Inventors list

Assignees list

Classification tree browser

Top 100 Inventors

Top 100 Assignees


Predictive

Subclass of:

375 - Pulse or digital communications

375240000 - BANDWIDTH REDUCTION OR EXPANSION

375240010 - Television or motion video signal

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
375240160 Motion vector 1370
375240130 Intra/inter selection 183
375240150 Bidirectional 179
375240140 Plural 141
Entries
DocumentTitleDate
20080260026Moving-picture coding apparatus, method and program - Decoded is a first stream carrying moving-picture signals coded with a first coding scheme with a first intra-picture coding and an inter-picture coding technique, thus generating decoded moving-picture data. Picture-type information on each frame or field picture of the decoded moving-picture data is generated. The picture-type information indicates a first picture type or a second picture type. The first picture type is for each picture coded with the first intra-picture coding technique whereas the second picture type is for each picture coded with the inter-picture coding technique. The decoded moving-picture data is encoded with a second coding scheme with a second intra-picture coding technique, thus generating a second stream. Auxiliary information areas are created in the second stream. Each auxiliary information area is accessible in relation to each picture of the decoded moving-picture data. The picture-type information is inserted into the auxiliary information areas.10-23-2008
20130044812ADAPTIVE CODING OF VIDEO BLOCK PREDICTION MODE - This disclosure describes techniques for coding of header information of video blocks. In particular, the techniques of this disclosure select one of a plurality of prediction modes for use in generating a prediction block of a video block of a coding unit, the plurality of prediction modes including unidirectional prediction modes and multi-directional prediction modes that combine at least two unidirectional prediction modes. An encoding device encodes the prediction mode of the current video block based on prediction modes of one or more previously encoded video blocks of the coding unit. Likewise, a decoding unit receives encoded video data of a video block of a coding unit and decodes the encoded video data to identify one of a plurality of prediction modes for use in generating a prediction block of the video block based on prediction modes of one or more previously decoded video blocks of the coding unit.02-21-2013
20130044811Content-Based Adaptive Control of Intra-Prediction Modes in Video Encoding - A method for encoding a video sequence in a video encoder is provided that includes receiving a picture in the video sequence, selecting an intra-prediction set for the picture from a plurality of intra-prediction sets based on activity in a previous picture in the video sequence, wherein the intra-prediction set is a subset of intra-prediction block sizes and modes of the video encoder, and coding the picture using the set of intra-prediction block sizes and modes for intra-prediction of macroblocks in the picture.02-21-2013
20130044813MOVING IMAGE PREDICTION ENCODING/DECODING SYSTEM - A moving image encoding/decoding system may include a video predictive encoding device, which may include: an encoding device which encodes each of a plurality of input pictures to generate compressed picture data including a random access picture, and encodes data about display order information of each picture; a restoration device which decodes the compressed picture data to restore a reproduced picture; a picture storage device which stores the reproduced picture as a reference picture; and a memory management device which controls the picture storage device. Following completion of an encoding process of generating the random access picture, the memory management device refreshes the picture storage device by setting every reference picture in the picture storage device, except for the random access picture, as unnecessary immediately before or immediately after encoding a picture with display order information larger than the display order information of the random access picture.02-21-2013
20130044814METHODS AND APPARATUS FOR ADAPTIVE INTERPOLATIVE INTRA BLOCK ENCODING AND DECODING - Methods and apparatus are provided for adaptive interpolative intra block encoding and decoding. An apparatus includes a video encoder for encoding at least an intra block in a picture by dividing the intra block into at least a first partition and a second partition, and generating predictions of pixels in the second partition by adaptively interpolating reconstructed pixels from the first partition.02-21-2013
20090257492VIDEO DATA MANAGEMENT - The invention relates to encoding and decoding pixel blocks of a video frame through a hybrid mode involving usage of a first prediction of a pixel block and at least a second prediction of the pixel block. An initial first weighting factor is modified using a factor modifier to generate a first weighting factor comprising multiple different factor values that are assignable to the different pixel-based first prediction values of the first prediction. The first weighting factor is applied to the first prediction and a second weighting factor is applied to the second block prediction. The at least two weighted predictions are then combined to form a hybrid prediction of the current pixel block.10-15-2009
20130028317INTRA-MODE SEARCH FOR VIDEO ENCODING - A search method for identifying an intra mode that can produce acceptable video-encoding quality for a pixel block while striking a proper balance between the quality and processor load. In a representative embodiment, the search method relies on a set of mode-selection rules for iteratively identifying candidate intra modes. Each identified candidate is evaluated based on a comparison of its sum of absolute differences (SAD) with the smallest SAD in the set of the previously identified candidates. The mode-selection rules use the comparison results as conditions that efficiently guide the search method toward an intra mode that is suitable for encoding the pixel block with acceptable video quality. On average, a representative embodiment of the search method disclosed herein is advantageously capable of finding a suitable intra mode in fewer iterations than a comparable prior-art search method.01-31-2013
20130028322MOVING IMAGE PREDICTION ENCODER, MOVING IMAGE PREDICTION DECODER, MOVING IMAGE PREDICTION ENCODING METHOD, AND MOVING IMAGE PREDICTION DECODING METHOD - An object is to improve the quality of a reproduced picture and improve the efficiency of predicting a picture using the reproduced picture as a reference picture. For this object, a video prediction encoder 01-31-2013
20130028321APPARATUS AND METHOD FOR IMAGE PROCESSING - The present invention relates to apparatuses and methods for image processing allowing for minimization of image degradation in a screen as a whole and improvement in local image degradation. An adaptive loop filter (01-31-2013
20130028320Redundant Data Dispersal In Transmission Of Video Data Based On Frame Type - The transmitting end of a content distribution system selectively employs a redundancy mechanism to encode video data. In the event that a particular frame contains information upon which the decoding of multiple frames may depend, the transmitting end can apply a redundancy mechanism to redundantly distribute the data of the frame throughout a set of data segments, each of which is separately transmitted via the network to the receiving end. Otherwise, in the event that a particular frame to be transmitted does not contain substantial information upon which the decoding of multiple frames may depend, the loss of some or all of the data of the frame may not appreciably affect the presentation of the video content at the receiving end and thus the transmitting end can forgo application of the redundancy mechanism to such frames so as to avoid unnecessary processing and reduce the overall network bandwidth used.01-31-2013
20130028318MOVING IMAGE DECODER AND MOVING IMAGE DECODING METHOD - In one embodiment, there is provided a moving image decoder for decoding a compression-coded moving image stream. The decoder includes: a deblocking filter configured to perform deblocking filter processing on each of frames to be decoded; a load detector configured to detect a magnitude of internal processing loads occurring inside a video player, including a processing load for decoding; a determination module configured to determine whether to bypass the deblocking filter processing, depending on the magnitude of the internal processing loads. The deblocking filter is configured to bypass the deblocking filter processing, if the magnitude of the internal processing loads is bigger than a threshold value and a processing subject block of the frame is decoded using inter-view prediction.01-31-2013
20130028319MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND MOVING PICTURE CODING AND DECODING APPARATUS - A moving picture coding method includes (i) transforming, for each of one or more second processing units included in the first processing unit, a moving picture signal in a spatial domain into a frequency domain coefficient and quantizing the frequency domain coefficient, and (ii) performing arithmetic coding on a luminance CBF flag indicating whether or not a quantized coefficient is included in the second processing unit in which transform and quantization are performed, wherein, in the arithmetic coding, a probability table for use in arithmetic coding is determined according to whether or not the size of the first processing unit is identical to the size of the second processing unit and whether or not the second processing unit has a predetermined maximum size.01-31-2013
20100061451DYNAMIC IMAGE DECODING DEVICE - A moving image decoding device of the present invention is for decoding moving image data encoded by a predictive encoding method. In decoding a block that has been encoded by an inter-screen predictive encoding, if a reference block is not stored in frame memory, the moving image decoding device decodes the block assuming that the block has been encoded by an intra-screen predictive encoding.03-11-2010
20100020871Method and Device for Video Coding and Decoding - Embodiments of the present invention relate to video coding for multi-view video content. It provides a coding system enabling scalability for the multi-view video content. In one embodiment, a method is provided for encoding at least two views representative of a video scene, each of the at least two views being encoded in at least two scalable layers, wherein one of the at least two scalable layers representative of one view of the at least two views is encoded with respect to a scalable layer representative of the other view of the at least two views.01-28-2010
20090196350METHODS AND DEVICES OF INTRA PREDICTION ENCODING AND DECODING - Methods and devices of intra prediction encoding and decoding are described, so that the encoding performance of intra coding is better. A prediction encoding is performed on the same frame by using at least two intra prediction encoding modes, and information indicating the intra prediction encoding mode of each block is written into the encoded result, so as to encode different blocks by using the most appropriate modes. By using at least two intra prediction encoding modes, relevant indication information is written into the encoded result, so as to correctly perform the decoding. During decoding, the information of intra prediction encoding mode of each block of the same frame is firstly read, and then the block is decoded by using this mode. Each block is organized in a form of hierarchical tree, so as to obtain the optimal performance, and reduce the amount of the information indicating the intra prediction encoding mode of each block in the encoded result.08-06-2009
20090196349METHOD FOR ESTIMATING CONTOUR OF VIDEO OBJECT - A method for estimating a boundary between a background and a user object in a video, in which the user object is segmented from the background is provided. The initial object contour is estimated in a first video frame for object segmentation, and color probability density functions are estimated for the user object and the background segmented from the first video frame. An edge strip with a predetermined width is generated in a current frame based on an object contour of a previous frame, and a coherence probability density function of the edge strip is estimated. The user object is segmented in the current frame by energy minimization.08-06-2009
20100150231APPARATUS FOR REFERENCE PICTURE RESAMPLING GENERATION AND METHOD THEREOF AND VIDEO DECODING SYSTEM USING THE SAME - The exemplary embodiments of the present invention are direct to a method for generating a resampling reference picture and an apparatus and video decoding system using this method. The video image decoding system is used to decode a bit stream, so as to obtain a current frame. The method for generating a resampling reference picture includes following steps: (a) looking ahead specific information of next x frames of the current frame in the bit stream; (b) determining whether to generate a resampling reference picture according to the specific information of the next x frames.06-17-2010
20120183057SYSTEM, APPARATUS, AND METHOD FOR ENCODING AND DECODING DEPTH IMAGE - An apparatus and method for encoding and decoding a depth image. An encoding apparatus may apply a block to a plurality of pixels forming a depth image, may divide the block into at least two areas based on a representative value, and may perform prediction encoding. Additionally, the encoding apparatus may encode prediction information associated with the block, may separate the at least two areas, and may select a prediction mode to perform prediction encoding.07-19-2012
20120183056METHOD AND DEVICE FOR IMPROVED MULTI-LAYER DATA COMPRESSION - An encoder and method for encoding data in a scalable data compression format are described. In particular, process for encoding spatially scalable video are described in which the base layer uses downscaled residuals from a full-resolution encoding of the video in its motion estimation process. The downscaled residuals may also be used in the coding mode selection process at the base layer.07-19-2012
20120183055Temporal Prediction Structure Aware Temporal Filter - Disclosed are a system, method, apparatus, and computer readable media containing instructions for pre-filtering one or more pictures of a prediction structure. In an exemplary embodiment, a system includes an input for receiving the one or more pictures and a pre-filter, operatively coupled to the input and receiving the one or more pictures. The pre-filter can include a prediction position determining module for determining a position of at least one picture in the prediction structure, a context memory for storing determined position information, and a filter module for selecting a filter context based on the determined position and using the selected filter context to filter the at least one picture.07-19-2012
20120183059IMAGE CODING METHOD, IMAGE DECODING METHOD, MEMORY MANAGING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, MEMORY MANAGING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - With an image coding method which allows reduction of processing loads, when pictures included in a video signal are classified into layers so as to belong to their respective layers, a picture that belongs to the second layer that is located in a range restricted according to the first layer to which a current picture to be coded that is one of the pictures belongs, is referred to as a reference picture for the current picture, and the current picture is coded based on the reference picture.07-19-2012
20120183058MACRO-BLOCK ENCODING OF SKIPPED VIDEO FRAMES - A video system includes an encoder for generating a compressed bit stream in response to a received video signal. A transitional location is located in the bit stream that includes skip macro-block encoding, where the transitional location provides an indication where a linear relationship starts to exist between a length of the encoded bit stream and a length of a number of skipped macro-blocks. The skipped macro-blocks in the bit stream before the transitional location are encoded using a predetermined nonlinear relationship between the length of the encoded bit stream and the length of the number of skipped macro-blocks, whereas skipped macro-blocks in the bit stream are encoded using a linear relationship between the length of the encoded bit stream and the length of the number of skipped macro-blocks.07-19-2012
20110194604CODE CONVERSION/TRANSMISSION METHOD AND APPARATUS FOR MOVING PICTURE DATA, AND CODE CONVERSION/RECEPTION METHOD AND APPARATUS FOR MOVING PICTURE DATA - A code conversion/transmission apparatus for being supplied with compressed encoded data and converting and outputting the data to a transmission path has code converter/transmitters for outputting the encoded data input thereto and encoded data produced by re-encoding the encoded data input thereto, or outputting a plurality of encoded data comprising encoded data produced by separately re-encoding the encoded data input thereto, respectively, and transmitting the plurality of encoded data to at least one transmission path. At least a portion of the encoded data input thereto and at least a portion of the re-encoded encoded data are transmitted to the transmission path.08-11-2011
20110194601VIDEO DECODING DEVICE - A video decoding device is provided. The device includes an error checking unit and a decoding unit. The error checking unit checks the error state of a video data, so as to produce an error information. Then, the decoding unit selectively performs an error concealment process and a decoding process for the video data according to the error information. The video decoding device of the present invention can perform error checking process, error concealment process, and video decoding process for the video data.08-11-2011
20090122864MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, AND APPARATUSES OF THE SAME - A moving picture coding method according to the present invention is a moving picture coding method for coding a moving picture which includes pictures, the method including: partitioning a picture into blocks each of which includes pixels; selecting a scanning scheme from among plural scanning schemes; scanning the blocks according to the selected scanning scheme; and coding the blocks in an order in which the blocks are scanned. In doing so, in the partitioning, the picture is partitioned into rows and columns of macroblocks each of which is partitioned into the blocks. The plural scanning schemes include a first scanning scheme for scanning the blocks in the macroblock per row of blocks.05-14-2009
20090122865METHOD AND DEVICE FOR CODING A SCALABLE VIDEO STREAM, A DATA STREAM, AND AN ASSOCIATED DECODING METHOD AND DEVICE - A video sequence is coded in the form of a base level and an refinement level. A group of pictures of the base level comprises intra coded or mono-predicted end images (I,P) and bi-predicted images (B05-14-2009
20130077683SYSTEM AND METHOD FOR INTRACODING AND DECODING VIDEO DATA - A video system for coding a stream of video data that includes a stream of video frames divides each video frame into a matrix of a plurality of subblocks, wherein each subblock includes a plurality of pixels. The video system operates in accordance with nine prediction modes. Each prediction mode determines a prediction mode according to which a present subblock is to be coded. One of the nine prediction modes is selected to encode the present subblock, wherein the selected prediction mode provides for a minimum error value in the present subblock.03-28-2013
20120177116Efficient Transform Unit Representation - In one embodiment, a method includes receiving a prediction unit (PU) for a coding unit (CU) of the video content. The method analyzes the prediction unit to determine a size of prediction unit. A size of a transform unit is determined based on the size of the prediction unit based on a set of rules. The set of rules specify the size of the transform unit is linked to the size of prediction unit and not a size of the coding unit. The method then outputs the size of the transform unit for use in a transform operation.07-12-2012
20100118945METHOD AND APPARATUS FOR VIDEO ENCODING AND DECODING - An video encoding apparatus includes a dividing unit 05-13-2010
20100118939PREDICTED REFERENCE INFORMATION GENERATING METHOD, VIDEO ENCODING AND DECODING METHODS, APPARATUSES THEREFOR, PROGRAMS THEREFOR, AND STORAGE MEDIA WHICH STORE THE PROGRAMS - When video images are processed by applying temporal or spatial interframe prediction encoding to each divided area, and generating a predicted image of a processing target area based on a reference frame of the processing target area and reference information which indicates a predicted target position of the processing target area in the reference frame, predicted reference information is generated as predicted information of the reference information. Reference information used when an area adjacent to the processing target area was processed is determined as predicted reference information prediction data used for predicting the reference information of the processing target area. Reference area reference information is generated using one or more pieces of reference information used when a reference area indicated by the prediction data was processed. The predicted reference information prediction data is updated using the reference area reference information. The predicted reference information is generated using one or more pieces of the updated predicted reference information prediction data.05-13-2010
20100158110Methods and Apparatus for Weighted Prediction in Scalable Video Encoding and Decoding - There are provided methods and apparatus for weighted prediction in scalable video encoding and decoding. A scalable video encoder includes an encoder (06-24-2010
20100158111Method for insertion of data, method for reading of inserted data - The invention relates to a method for insertion of data in a block of image data, called the current block, of a sequence of images. The current block is coded or intended to be coded in the form of temporally predicted image data from prediction image data defined according to a first prediction mode According to the invention, the insertion method comprises the modification, according to the data to be inserted, of the first prediction mode into a second prediction mode different from the first prediction mode with a view to coding of the current block according to the second prediction mode, the second prediction mode being defined so that the prediction image data obtained with the second prediction mode are identical to the prediction image data obtained with the first prediction mode.06-24-2010
20100074331Image encoder, image decoder, and image encoding system - An image coding system includes an image encoder and a predictive image decoder. The image encoder encodes an input image to obtain encoded data, compares the input image with a reference image, generates error information identifying parts of the input image that are changed with respect to the reference image, and outputs the encoded data and the error information. The predictive image decoder predicts the image, using a simplified prediction method for parts of the image identified by the error information as not being changed, and decodes the encoded data and the predicted data to obtain decoded image data. Use of the simplified prediction method in unchanged parts of the image reduces the prediction processing load without significant loss of prediction accuracy.03-25-2010
20100074334Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation for a single direction or a bi-direction between a plurality of views with view number information and view identification information, obtaining type information indicating whether the random access slice is predicted for a single direction or a bi-direction, initializing the reference picture list using the view number information and the view identification information according to the type information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header.03-25-2010
20100074333Method and system for transcoding based robust streaming of compressed video - Described herein is a novel transcoding technique called lossless inter frame transcoding (LIFT) for improving the error resilience of video streaming. According to various embodiments, conventional coded blocks are selectively transcoded into new transcoded block. At the decoder, the transcoded block can be transcoded back to the conventional coded block when the prediction is available and can also be robustly decoded independently when the prediction is unavailable. According to another embodiment, an offline transcoding and online composing technique is provided for generating a composite frame using the transcoded and conventional coded blocks and adjusting the ratio of the transcoded blocks, thereby achieving error robustness scalability.03-25-2010
20100074332OFFSET CALCULATION IN SWITCHED INTERPOLATION FILTERS - This disclosure describes techniques for adding offset to predictive video blocks during video coding. In one example, a method of encoding a video block includes interpolating a first block of predictive values based on a first reference video unit within a first list of reference data, and a second block of predictive values based on a second reference video unit within a second list of reference data, calculating, for sub-integer pixel positions, a first offset value based on the first block and the current video block, and a second offset value based on the first offset value and the second block, determining a final block of offset values based on the first block of predictive values, the second block of predictive values, the first offset values, and the second offset values, and encoding the current video block based on the final block of offset values.03-25-2010
20100074330ADAPTIVE FILTER - A video encoder includes a prediction unit for performing prediction techniques according to original video data and reconstructed video data to generate prediction samples, a reconstruction unit for reconstructing the prediction samples to form the reconstructed video data, and a reference picture buffer for storing the reconstructed video data as reference video data. The video encoder also includes a filter parameter estimator for estimating filter parameters according to the original video data of a current picture and the reconstructed video data of the current picture, and an adaptive loop filter for filtering the reconstructed video data of the current picture according to stored filter parameters of a prior picture in coding order. The filter parameter estimator and adaptive loop filter can operate in parallel.03-25-2010
20100074329ADAPTIVE INTERPOLATION FILTER FOR VIDEO CODING - A video encoder that utilizes adaptive interpolation filtering for coding video data includes a prediction unit, a reconstruction unit, a reference picture buffer, a filter parameter estimator for estimating filter parameters according to the original video data and the predicted samples, and an adaptive interpolation filter for utilizing the stored filter parameters to perform filtering on the reconstructed video data.03-25-2010
20130077680DECODED PICTURE BUFFER MANAGEMENT - Techniques are described related to output and removal of decoded pictures from a decoded picture buffer (DPB). The example techniques may remove a decoded picture from the DPB prior to coding a current picture. For instance, the example techniques may remove the decoded picture if that decoded picture is not identified in the reference picture set of the current picture.03-28-2013
20130077678REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING - Techniques are described related to constructing reference picture lists. The reference picture lists may be constructed from reference picture subsets of a reference picture set. In some examples, the techniques may repeatedly list reference pictures identified in the reference picture subsets until the number of entries in the reference picture list is equal to the maximum number of allowable entries in the reference picture list.03-28-2013
20130077677REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING - Techniques are described related to constructing reference picture lists. The reference picture lists may be constructed from reference picture subsets of a reference picture set. In some examples, the reference picture subsets may be ordered in a particular manner to form the reference picture lists.03-28-2013
20130039419Method for Accessing a Spatio-Temporal Part of a Compressed Video Sequence - The present invention concerns a processing method for accessing a spatio-temporal part of a compressed video sequence, as well as an associated device.02-14-2013
20130039417RESIDUAL TREE STRUCTURE OF TRANSFORM UNIT PARTITIONING - In one embodiment, a method includes receives a prediction unit (PU) for a coding unit (CU) of video content. The PU is partitionable into a plurality of PU partition types. The method determines a PU partition type for the PU and a residual tree structure based on the PU partition type for partitioning of the CU into transform units (TUs). The residual tree includes a binary partition of a node into two. A TU partition for the PU partition type is determined based on the residual tree structure and a desired level of partitioning in the residual tree structure. The method then uses the TU partition in a transform operation.02-14-2013
20130039420METHOD OF PROCESSING AN IMAGE - The invention relates to a method for processing an image divided into blocks of pixels comprising the steps of: 02-14-2013
20130039418System and Method for Video and Audio Encoding on a Single Chip - An apparatus is disclosed for performing real time video/audio encoding on a single chip. Within the single chip, a video encoder generates encoded video data from uncompressed video data and an audio encoder generates encoded audio data from uncompressed audio data. A mux processor within the single chip generates an output stream of encoded data from the encoded video data and the encoded audio data.02-14-2013
20130039416IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD AND PROGRAM - Provided is an image encoding apparatus including a characteristic quantity generation unit that generates a characteristic quantity showing a correlation between pictures for each candidate of a reference picture, with a first viewpoint picture different in time direction from the first viewpoint picture and a second viewpoint picture different from the first viewpoint picture being set as the candidates of the reference picture, and a reference picture list generation unit that generates a reference picture list by selecting as many reference pictures for the first viewpoint picture as the reference pictures for the second viewpoint picture from the candidates of the reference pictures based on the characteristic quantity.02-14-2013
20130039415METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE USING VARIABLE-SIZE MACROBLOCKS - A video encoding apparatus includes a candidate block type configuration unit for configuring block type candidates for encoding an image by using variable sized macroblocks; a video encoder for encoding an input image for each block type candidate; and a block type determiner for determining a block type based on encoding costs by the block type candidate, and generating a bitstream including image data encoded by the determined block type and information for the determined block type. Determining the block type to match the image characteristics enables combinations of diverse modes such as a large block and macroblock size, a minimum subblock size, available divisional block type, prediction mode type within a macroblock, and so on to achieve more effective encoding and decoding of high resolution images.02-14-2013
20130083847MOVING IMAGE COMPRESSION ENCODING APPARATUS, METHOD, AND CONTROL PROGRAM - A moving image encoding apparatus decides a picture number for identifying a frame which is encoded by each encoding unit on the basis of a count value of a sync signal of an input moving image signal and a value corresponding to the number of a plurality of encoding units and notifies each encoding unit of the picture number. Each encoding unit obtains a moving image signal of the frame to be subjected to encoding among the input moving image signal, on the basis of the notified picture number and encodes the obtained moving image signal. Data encoded by a plurality of encoding units is multiplexed as a bit stream in accordance with the picture number and output.04-04-2013
20130077679VIDEO CODING WITH SUBSETS OF A REFERENCE PICTURE SET - Techniques are described related to deriving a reference picture set. A reference picture set may identify reference pictures that can potentially be used to inter-predict a current picture and picture following the current picture in decoding order. In some examples, deriving the reference picture set may include constructing a plurality of reference picture subsets that together form the reference picture set.03-28-2013
20130077681REFERENCE PICTURE SIGNALING AND DECODED PICTURE BUFFER MANAGEMENT - Techniques are described related to performing random access starting from a random access point picture that is not an instantaneous decoder refresh picture. Some techniques are also related to reducing the amount of information that is signaled for long-term reference pictures of a reference picture set. Additional techniques are also related to decoded picture buffer management, such as removing decoded pictures based on a temporal identification value.03-28-2013
20130083848SYSTEMS AND METHODS FOR DYNAMIC TRANSCODING OF INDEXED MEDIA FILE FORMATS - Methods and systems for transcoding from an input media stream to an output media stream, wherein the input media stream and the output media stream are in an indexed file format. The methods and systems are capable of generating an efficiently coded media file where the movie box is generated and sent before transcoding is complete, while maintaining acceptable and consistent quality throughout and minimizing the total size of the file.04-04-2013
20130083849IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency.04-04-2013
20100046621IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - The present invention can suppress the decline in video quality during encoding. The present invention generates, for each of the nine intra image prediction modes preset according to the AVC standard, a difference image data item containing a difference value from pixels surrounding a process-target pixel. Then, an encoding device (02-25-2010
20100046620SCALABLE VIDEO CODING ENCODER WITH ADAPTIVE REFERENCE FGS AND FGS MOTION REFINEMENT MECHANISM AND METHOD THEREOF - Provided are alternatives for improving coding efficiency when an AR-FGS technique and an FGS motion refinement technique are applied to scalable video coding. When prediction of a residual signal an FGS layer is not performed, a ′ prediction signal of block related to the FGS layer is predicted in the same manner as the manner of predicting a prediction signal of a base quality layer. A scaling factor is allowed to have a non-zero value if required, and the residual signal of the FGS layer is used to determine a scaling factor of a higher FGS layer. The AR-FGS and FGS motion refinement techniques are restricted from being simultaneously used for key pictures.02-25-2010
20100046619METHOD AND APPARATUS FOR DECODING/ENCODING A VIDEO SIGNAL - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.02-25-2010
20130034156INTER-PREDICTION METHOD AND VIDEO ENCODING/DECODING METHOD USING THE INTER-PREDICTION METHOD - An inter-prediction method and a video encoding/decoding method using the inter-prediction method are disclosed. The video encoding method using inter-prediction includes: encoding a first picture that serves as a reference for random access; inter-prediction encoding a block included in a second picture, which is displayed before the first picture, by using a plurality of reference pictures; generating reference picture information representing whether a past picture, which is displayed before the second picture, is used as a reference picture for encoding the second picture; and transmitting the encoded first and second pictures and the reference picture information.02-07-2013
20130034159DECODER, ENCODER, METHOD FOR DECODING AND ENCODING, DATA STREAM - A decoder for decoding a picture is described, having: an extractor adapted to extract a first subset of syntax elements from a received data stream and a second subset of syntax elements being disjoint from the first subset of syntax elements, wherein the second subset of syntax elements has filter indication information defining a first filter for a first region of at least two different regions of the picture and a second filter for a second region of the at least two different regions of the picture; a pre-decoder adapted to pre-decode the picture based on the first subset of syntax elements to produce a reconstructed version of the picture; and a filter stage adapted to apply the first filter to the first region of the reconstructed picture to obtain a first filtered version of the reconstructed version of the picture and to apply the second filter to the second region of the first filtered version of the reconstructed version of the picture to obtain a second filtered version of the reconstructed version of the picture.02-07-2013
20130034158APPARATUS FOR INTRA PREDICTING A BLOCK, APPARATUS FOR RECONSTRUCTING A BLOCK OF A PICTURE, APPARATUS FOR RECONSTRUCTING A BLOCK OF A PICTURE BY INTRA PREDICTION - An apparatus for intra predicting a block to be predicted of a picture from neighboring image samples sequentially extending along two rays starting at a common intersection point and pointing into different directions, the neighboring image samples including edge neighboring samples bordering the block to be predicted, includes a smoothing filter and a determiner. The smoothing filter is configured to one-dimensionally filter the neighboring image samples, which are sequentially arranged into a sequence by anti-parallelly traveling along a first one of the two rays and parallelly traveling along a second one of the two rays to obtain a filtered image sample sequence. The determiner is configured to determine a prediction value for a predetermined image sample of the block to be predicted by using the filtered image sample sequence.02-07-2013
20130034157INHERITANCE IN SAMPLE ARRAY MULTITREE SUBDIVISION - A better compromise between encoding complexity and achievable rate distortion ratio, and/or to achieve a better rate distortion ratio is achieved by using multitree sub-divisioning not only in order to subdivide a continuous area, namely the sample array, into leaf regions, but using the intermediate regions also to share coding parameters among the corresponding collocated leaf blocks. By this measure, coding procedures performed in tiles—leaf regions—locally, may be associated with coding parameters individually without having to, however, explicitly transmit the whole coding parameters for each leaf region separately. Rather, similarities may effectively exploited by using the multitree subdivision.02-07-2013
20130077682VIDEO ENCODING METHOD AND VIDEO ENCODING APPARATUS AND VIDEO DECODING METHOD AND VIDEO DECODING APPARATUS, WHICH PERFORM DEBLOCKING FILTERING BASED ON TREE-STRUCTURE ENCODING UNITS - A method of encoding a video is provided, the method includes: determining a filtering boundary on which deblocking filtering is to be performed based on at least one data unit from among a plurality of coding units that are hierarchically configured according to depths indicating a number of times at least one maximum coding unit is spatially spilt, and a plurality of prediction units and a plurality of transformation units respectively for prediction and transformation of the plurality of coding units, determining filtering strength at the filtering boundary based on a prediction mode of a coding unit to which pixels adjacent to the filtering belong from among the plurality of coding units, and transformation coefficient values of the pixels adjacent to the filtering boundary, and performing deblocking filtering on the filtering boundary based on the determined filtering strength.03-28-2013
20090232207METHOD AND APPARATUS FOR ENCODING/DECODING IMAGE BASED ON INTRA PREDICTION - Provided are an intra prediction-based encoding method, and an apparatus for accomplishing the same. In the method, a linear prediction coefficient of a current block is calculated based on encoded blocks adjacent to the current block, a predicted block is generated by performing intra prediction on the current block by using a linear prediction coefficient, and a residual block that is the difference between the current block and the predicted block is encoded. Accordingly, information regarding a direction of intra prediction does not need to be additionally transmitted, thereby reducing the amount of bits that are to be transmitted, and the quality of an image can be improved by adaptively controlling the efficiency and precision of intra prediction.09-17-2009
20130034155VIDEO-ENCODING METHOD AND VIDEO-ENCODING APPARATUS USING PREDICTION UNITS BASED ON ENCODING UNITS DETERMINED IN ACCORDANCE WITH A TREE STRUCTURE, AND VIDEO-DECODING METHOD AND VIDEO-DECODING APPARATUS USING PREDICTION UNITS BASED ON ENCODING UNITS DETERMINED IN ACCORDANCE WITH A TREE STRUCTURE - Provided are a method and apparatus for encoding a video and a method and apparatus for decoding a video. The encoding method includes: splitting a picture of the video into one or more maximum coding units; encoding the picture based on coding units according to depths which are obtained based on a partition type determined according to the depths of the coding units according to depths, determining coding units according to coded depths with respect to each of the coding units according to depths, and thus determining coding units having a tree structure; and outputting data that is encoded based on the partition type and the coding units having the tree structure, information about the coded depths and an encoding mode, and coding unit structure information indicating a size and a variable depth of a coding unit.02-07-2013
20100111179VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-06-2010
20110194603APPARATUS, A METHOD AND A COMPUTER PROGRAM FOR VIDEO CODING - There is disclosed an apparatus, a method and a computer program for video coding. The apparatus comprises a selector configured for selecting a pixel for prediction; a projection definer configured for determining a projection of said pixel to a set of reference pixels; and a prediction definer configured for selecting one or more reference pixels from said set of reference pixels on the basis of said projection, and using said selected one or more reference pixels to obtain a prediction value for said pixel to be predicted.08-11-2011
20100104011MOVING PICTURE CODING METHOD - A moving picture coding method for coding a moving picture includes: determining a luminance change (S04-29-2010
20100104010REAL-TIME RATE-CONTROL METHOD FOR VIDEO ENCODER CHIP - The present invention discloses a real-time rate-control method for a video encoder chip, wherein a BU-based RC algorithm is realized in a pipeline architecture, and wherein the RC algorithm is divided into an UpdateQP part arranged before the IME stage and an UpdateModel part arranged behind the entropy stage. When a currently processed frame contains a plurality of macro blocks, the bits used by several leading macro blocks and the remaining bits are predicted. Only the average value of the MADs of the preceding frame is stored in the memory. Thereby, memory consumption is greatly reduced, and quantization parameters are obtained to predict the bit number required by the next frame. The present invention further defines a region of interest and automatically regulates the bit distribution ratio thereof to enhance the sharpness thereof.04-29-2010
20100104012Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.04-29-2010
20100104009METHODS AND SYSTEMS FOR IMPROVING NETWORK RESPONSE DURING CHANNEL CHANGE - In response to a channel change command in a home network, to reduce latency a real time network bandwidth determination is made and if the determination indicates that bandwidth is sufficient to support only I-frame transmission, then only I-frames are sent temporarily from the source to the sink. Otherwise, I and P frames only are sent and may he encoded at a faster than normal frame rate and displayed at a lower than normal frame rate. If the sink is not configured for non-standard groups of pictures (GOP) some of the P frames can be indicated to the sink as being B-frames.04-29-2010
20100040143Video coding apparatus and method - A video coding apparatus includes an intra prediction mode determining unit that fixedly selects a mode in which same intra prediction values are used for all blocks to be processed in a macroblock; and an intra prediction coding unit that performs intra prediction coding separately for an AC component and a DC component of a block to be processed.02-18-2010
20100027624METHODS AND APPARATUS FOR USING SYNTAX FOR THE CODED_BLOCK_FLAG SYNTAX ELEMENT AND THE CODE_BLOCK_PATTERN SYNTAX ELEMENT FOR THE CAVLC 4:4:4 INTRA, HIGH 4:4:4 INTRA, AND HIGH 4:4:4 PREDICTIVE PROFILES IN MPEG-4 AVC HIGH LEVEL CODING - There are provided methods and apparatus for using syntax for the coded_block_flag syntax element for the CAVLC 4:4:4 Intra, High 4:4:4 Intra, and High 4:4:4 Predictive profiles in MPEG-4 AVC high level coding. An apparatus includes an encoder for encoding image data into a resultant bitstream in accordance with an encoding profile that encodes a sample of the image data such that the sample includes two chrominance arrays and a luminance array. Each of the two chrominance arrays has a same height and a same width as the luminance array. The encoder indicates a presence of at least one 8x8 block in the resultant bitstream using a syntax element.02-04-2010
20090122863Video transcoding techniques for gaming networks, and gaming networks incorporating the same - The exemplary embodiments described herein relate to light-weight video transcoding techniques for allowing media (e.g., audiovisual content that may be pre-recorded media and/or live media provided in substantially real-time) to one or more peripherals (e.g., gaming devices, overhead displays, etc.) attached to gaming networks. In certain exemplary embodiments, video data to be distributed is received from a video server. The video data is decompressed into raw video data. The raw video data is stripped down by discarding at least some component data of the raw video data and at least some lower bits of the raw video data. A predictor algorithm is run on the stripped-down raw video data. Recompressed data to be sent to one or more peripherals is generated based on output of the predictor algorithm in accordance with a compression algorithm. The recompressed data may be received at at least one peripheral, the recompressed data may be decompressed, and existing component data may be substituted for the discarded component data.05-14-2009
20120213277MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND STREAM DATA - A signal separation unit (08-23-2012
20120183062METHOD OF EFFECTIVELY PREDICTING MULTI-LAYER BASED VIDEO FRAME, AND VIDEO CODING METHOD AND APPARATUS USING THE SAME - A method and apparatus are provided for effectively predicting a video frame that use all of the advantages of an intra mode and an intra BL mode in multi-layer structure based-video coding. The method includes reconstructing the intra block of a lower layer using the previously reconstructed first neighboring blocks of the intra block; subtracting the first neighboring blocks from previously stored the second neighboring blocks of an upper layer corresponding to the first neighboring blocks; creating a differential predicted block based on a predetermined intra prediction mode by performing intra prediction using virtual differential neighboring blocks that are created as a result of the subtraction; adding the differential predicted block and the reconstructed intra block; and subtracting a predicted block, which is created as a result of the addition, from a block of the upper layer corresponding to the intra block.07-19-2012
20120183061Apparatus and Method for Decoding Picture Data - A decoding apparatus for decoding two encoded field data obtained by hierarchically encoding two field data associated with each of a plurality of picture data composing a moving picture image. The decoding apparatus comprising: a first decoding unit configured to decode one of the two encoded field data and obtain information associated with the two encoded field data; a conversion unit configured to interpolate first predicted image data generated by decoding by the first decoding unit according to the information and generate second predicted image data of a scanning position of the other encoded field data of the two encoded field data; and a second decoding unit configured to decode the other encoded field data of the two encoded field data based on the second predicted image data generated by the conversion unit.07-19-2012
20120183060TECHNIQUES FOR DESCRIBING TEMPORAL CODING STRUCTURE - The disclosed subject matter describes a new pattern description that can be part of an SEI message or a parameter set, and can be used to describe a temporal picture coding structure and associated bitrates and frame rates. The knowledge of the coding structure can benefit transraters, bitstream extractors, and digital video recorders. Decoders can utilize the coding structure information for example, to decode pictures in parallel, using multiple threads/cores.07-19-2012
20130083850IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency.04-04-2013
20100091853VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100091850VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100091846IMAGE PREDICTION/ENCODING DEVICE, IMAGE PREDICTION/ENCODING METHOD, IMAGE PREDICTION/ENCODING PROGRAM, IMAGE PREDICTION/DECODING DEVICE, IMAGE PREDICTION/DECODING METHOD, AND IMAGE PREDICTION DECODING PROGRAM - An objective is to provide an image predictive encoding device, image predictive encoding method, image predictive encoding program, image predictive decoding device, image predictive decoding method, and image predictive decoding program for selecting a plurality of candidate prediction signals, without increase in information amount. A weighting unit 04-15-2010
20130089146INFORMATION PROCESSING APPARATUS AND INFORMATION PROCESSING METHOD - To efficiently use anchor information. When anchor information to be used in a decoding process of a target block to be decoded does not satisfy an identity condition with anchor information used for a previous block, anchor information of an anchor block corresponding to the target block to be decoded is acquired from an anchor information storage unit. When the identity condition is satisfied, the anchor information of the previous block is continuously used. A motion vector is calculated using the acquired anchor information or the anchor information to be continuously used. Motion compensation is performed based on the calculated motion vector, and prediction image data is generated. Further, decoded image data is generated using the prediction image data04-11-2013
20130089145MOST PROBABLE TRANSFORM FOR INTRA PREDICTION CODING - A video coder can be configured to determine an intra-prediction mode for a block of video data, identify a most probable transform based on the intra-prediction mode determined for the block of video data, and code an indication of whether the most probable transform is a transform used to encode the block of video data. The most probable transform can be a non-square transform.04-11-2013
20130089147Video Transfer System - A synchronization signal generator of a decoder adds a predetermined value to a time value, and outputs a synchronization signal when the added time value coincides with a reproducing time value in a frame.04-11-2013
20130089143Method, System, and Apparatus for Intra-Prediction in a Video Signal Processing - According to an aspect of the present disclosure, a video encoder selects a block of intermediate size from a set of block sizes for intra-prediction estimation for encoding a video signal. A set of neighbouring blocks with the intermediate size are tested for combining. If the set of neighbouring blocks are determined to be combinable, the video encoder selects a larger block size formed by the tested neighbouring blocks for encoding. On the other hand, if the set of neighbouring blocks are determined to be not combinable, the video encoder selects a smaller block size from the set of tested neighbouring blocks for prediction. According to another aspect of the present disclosure, the best mode for intra-prediction is determined by first intra-predicting a block with intermediate modes in a set of modes. Then the intra-predictions are performed for the neighbouring modes of at least one intermediate mode.04-11-2013
20130089142Bandwidth-Friendly Representation Switching in Adaptive Streaming - Plural representations of a video stream may be provided. The plural representations may comprise a first chunk, a second chunk, and a transition chunk. The first chunk may comprise a first bitrate and the second chunk may comprise a second bitrate. The first and second chunks may be in decode order starting with an instantaneous decoding refresh (IDR) frame. The transition chunk may be in decode order starting with a non-IDR frame. Next, a request to transition from the first chunk to the second chunk may be received. Then a transition from the first chunk to the transition chunk responsive to the request may occur and the transition chunk may then be provided to another device.04-11-2013
20130089144METHODS AND APPARATUSES OF ENCODING/DECODING INTRA PREDICTION MODE USING CANDIDATE INTRA PREDICTION MODES - A method and an apparatus of encoding/decoding intra prediction mode using a plurality of candidate intra prediction modes are disclosed. A method of decoding an intra prediction mode can comprise deriving three candidate intra prediction modes about a current block and deriving an intra prediction mode of the current block. Therefore, by predicting an intra prediction mode of the current block based on a plurality of candidate intra prediction modes, video encoding efficiency can be improved.04-11-2013
20130051466METHOD FOR VIDEO CODING - A method for video coding is provided. The method includes retrieving a video frame, determining a maximal number of reference frames for the video frame, determining a search window size according to the maximal number of reference frames, and performing prediction encoding on the video frame according to the maximal number of reference frames and the search window size.02-28-2013
20130051465REFERENCE DATA BUFFER FOR INTRA-PREDICTION OF DIGITAL VIDEO - Encoding or decoding digital video frames in intra-prediction mode by selecting column reference data locations for blocks adjacent a current block from a column reference data buffer storing column reference data samples for no more than two macro blocks of the frame. In some cases, the column reference data buffer may include a storage size for samples of a first column of data of blocks of one macro block of luminance samples. Encoding and decoding may also include selecting row reference data locations for blocks adjacent a current block from a row reference data buffer storing row reference data samples for at least one row of macro blocks of the frame. In some cases, the row reference data buffer may include storage for samples of a first row of data of fourteen successive blocks spanning two rows. The concept can be applied to various video processing components and standards.02-28-2013
20100002767DYNAMIC IMAGE ENCODING DEVICE, DYNAMIC IMAGE DECODING DEVICE, DYNAMIC IMAGE ENCODING METHOD, DYNAMIC IMAGE DECODING METHOD, DYNAMIC IMAGE ENCODING PROGRAM, AND DYNAMIC IMAGE DECODING PROGRAM - A device and method to perform encoding and decoding at a high compression rate even with a video of a mixture of pictures of different bandwidths. In a video encoding device, a predicted signal generator extracts spatial frequency components in a predetermined band from a predetermined extraction reference picture except for a target reference picture used as a picture for prediction of a target picture as an object to be encoded, among reference pictures stored in memory. The predicted signal generator generates a predicted signal for the target picture from the target reference picture and the extracted spatial frequency components.01-07-2010
20100002765Image encoding apparatus and method - An image encoding apparatus includes a calculation unit for calculating complexity from pixel values of an input image, the complexity representing a code amount generated by prediction encoding each block included in a prediction target region of the input image, and an allocation unit for allocating a code amount to each block based on the calculated complexity of each block and an allowable code amount previously set for the prediction target region. The apparatus further includes a determination unit for determining an encoding parameter corresponding to each block based on the complexity of each block and the code amount allocated to each block, and an encoding unit for encoding each block by using the determined encoding parameter of each block. Finally, the apparatus includes a resetting unit for resetting the allowable code amount for a next prediction target region based on an occupancy amount of a buffer.01-07-2010
20090110066Method and Apparatus for Selecting a Coding Mode - A method and apparatus for selecting a coding mode for a block of a current picture are disclosed. For example, the method selects a coding mode in accordance with a cost function, for coding the block, wherein the cost function comprises a coding distortion parameter and a number of coding bits parameter, wherein said coding distortion parameter is measured in accordance with at least one of: between a prediction residual and a reconstructed prediction residual, or between a transformed prediction residual and a dequantized transformed prediction residual, wherein the number of coding bits parameter is computed in accordance with at least one of: from a true number of compressed bits resulting from coding said block, directly from a plurality of bins, or directly from a plurality of quantized transform coefficients.04-30-2009
20090304077REFRESH METHOD AND APPARATUS - Apparatuses and methods for improving coding processes and coding parameters for coding video data are provided for. A coder may select coding parameters for video data according to a default coding policy. The default coding policy may include selection of prediction modes (e.g., intra-coding or inter-coding) for each pixel group in each frame. A video coder may select some pixel groups in a frame to be coded as refresh pixel groups as an exception to the default assignment policies. The selection of refresh pixel groups may be based on prediction relationships among multiple frames of source video data. The default coding of the refresh pixel groups is then modified to enhanced the coding of the refresh pixel groups. The refresh pixel groups may permit fewer intra (I) frames be sent and/or may improve the quality of the recovered video.12-10-2009
20090304074Image Decoding Method, Device Therefore, and Program - A lower hierarchical decoder (12-10-2009
20090304075Moving Image Processing Method, Program of Moving Image Processing Method, Recording Medium Having Program of Moving Image Processing Method Recorded Thereon, and Moving Image Processing Apparatus - The present invention is applied, for example, to a moving image encoding apparatus and decoding apparatus based on ITU-T H.264. Syntax elements with a high frequency of appearance are processed using probability state variables held in a second memory 12-10-2009
20090103616METHOD AND DEVICE FOR GENERATING DEPTH IMAGE USING REFERENCE IMAGE, METHOD FOR ENCODING/DECODING DEPTH IMAGE, ENCODER OR DECODER FOR THE SAME, AND RECORDING MEDIUM RECORDING IMAGE GENERATED USING THE METHOD - The present invention relates to a method and device for generating a depth image, a method for encoding/decoding the depth image, an encoder/decoder for the same, and a recording medium recording an image generated by the method, which are related to a depth image encoding method that can effectively reduce a bit generation rate using a reference image obtained by at least one camera and improve encoding efficiency. A depth image generating method according to an embodiment of the invention includes a step (a) of obtaining a depth image at a viewpoint and setting the obtained depth image to a reference image; a step (b) of applying a 3D warphing method to the reference image and predicting and generating a depth image at a specific viewpoint; and a step (c) of removing a hole that exists in the predicted and generated depth image.04-23-2009
20090041122IMAGE CODING APPARATUS, IMAGE CODING METHOD AND IMAGE CODING PROGRAM - The image coding apparatus is provided to realize image coding with little calculation quantity and through rate distortion optimization thereby maintaining a favorable image quality. The image coding apparatus includes a processing unit that conducts frequency transform and quantization on a block in a predetermined manner for a plurality of coding modes, each mode having a different coding process, a cost calculating unit that calculates a predictive coded quantity and coding distortion in a coding mode using a result of the quantization conducted by the processing unit and a residue to obtain a cost regarding the coding mode, a minimum coding cost selecting unit that selects a minimum coding cost among the coding costs calculated for respective coding modes, and a coding unit that conducts coding on the blocks in a coding mode associated with the minimum coding cost selected by the minimum coding cost selecting unit.02-12-2009
20090041121Method and apparatus for encoding video data, and method and apparatus for decoding video data - Scalable video coding based on H.264/AVC uses motion compensation, which results in motion vectors and residual pictures. To optimize the encoding of the residual pictures of the enhancement-layer, they can be predicted from the base-layer. This requires complex encoders and decoders. Simplified residual prediction techniques are provided that focus on reducing the encoding and decoding complexity of the spatial scalable enhancement-layer with optimized coding efficiency. The method for encoding video data containing high-pass frames and low-pass frames comprises the steps of encoding the low-pass frames, wherein residual prediction may be used, splitting the high-pass frames into two interleaving frame groups, encoding the frames of the first of said frame groups, wherein residual prediction may be used, and encoding the frames of the second of the frame groups using an encoding method without residual prediction.02-12-2009
20090041120Luma and Chroma Encoding Using a Common Predictor - There are provided video encoders, video decoders, and corresponding methods. A video encoder for encoding video signal data for an image block includes an encoder for encoding all color components of the video signal data using a common predictor. A video decoder for decoding video signal data for an image block includes a decoder for decoding all color components of the video signal data using a common predictor. Additionally, an apparatus and method for encoding and decoding signal data for an image block includes an encoder and decoder for encoding/decoding color components of the video signal data without applying a residual color transform thereto. Furthermore, a video encoder and decoder for encoding/decoding video signal data for an image block includes an encoder and decoder for encoding/decoding the video signal data using unique predictors for each of color components of the video signal data.02-12-2009
20130136178IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, PROGRAM, AND INTEGRATED CIRCUIT - An image decoding method includes: restoring a selected prediction mode used in prediction at a time of coding; and decoding a current block included in coded image data to generate a decoded block, according to the prediction based on the selected prediction mode. The restoring includes: determining a first estimated prediction mode; determining a second estimated prediction mode different from the first estimated prediction mode; and restoring the selected prediction mode based on the mode information, the first estimated prediction mode, and the second estimated prediction mode.05-30-2013
20130136175NON-SQUARE TRANSFORM UNITS AND PREDICTION UNITS IN VIDEO CODING - This disclosure proposes techniques for transform partitioning in an intra-prediction video coding process. In one example, for a given intra-predicted block, a reduced number of transform unit partition options is allowed, based on certain conditions. In another example, transform units are decoupled from prediction units for intra-predicted block. For a given prediction unit, transforms of different sizes and shapes from the prediction unit may be applied. In another example, a reduced number of intra-prediction modes are allowed for a prediction unit having a non-square shape.05-30-2013
20090092187Luma and Chroma Decoding Using a Common Predictor - There are provided video encoders, video decoders, and corresponding methods. A video encoder for encoding video signal data for an image block includes an encoder for encoding all color components of the video signal data using a common predictor. A video decoder for decoding video signal data for an image block includes a decoder for decoding all color components of the video signal data using a common predictor. Additionally, an apparatus and method for encoding and decoding signal data for an image block includes an encoder and decoder for encoding/decoding color components of the video signal data without applying a residual color transform thereto. Furthermore, a video encoder and decoder for encoding/decoding video signal data for an image block includes an encoder and decoder for encoding/decoding the video signal data using unique predictors for each of color components of the video signal data.04-09-2009
20130070850Method For Modeling Coding Information Of A Video Signal To Compress/Decompress The Information - A method and an apparatus of decoding a video signal are provided. The present invention includes the steps of parsing first coding information indicating whether a residual data of an image block in the enhanced layer is predicted from a corresponding block in the base layer, from the bitstream of the enhanced layer, and decoding the video signal based on the first coding information. And, the step of parsing includes the step of performing modeling of the first coding information based on second coding information indicating whether prediction information of the corresponding block in the base layer is used to decode the image block in the enhanced layer. Accordingly, the present invention raises efficiency of video signal processing by enabling a decoder to derive information on a prediction mode of a current block in a decoder instead of transferring the information to the decoder.03-21-2013
20130070849Method and Device for Reordering Video Information - A method and device that allow picture slices of a Video stream to be processed in an order different than the order they were received is disclosed. Information mapping the location of picture slices that are stored in the order they were received is stored to allow subsequent processing to access the picture slice in any order, including render order.03-21-2013
20130070848LINE BUFFER REDUCTION FOR SHORT DISTANCE INTRA-PREDICTION - A video coder, such as a video encoder or a video decoder, identifies an entropy coding context in a set of one or more entropy coding contexts. The video coder identifies the entropy coding context without reference to a neighboring coding unit that is above a current coding unit in a current picture. The video coder then entropy codes a short distance intra-prediction (SDIP) syntax element of a coding unit (CU) using the identified entropy coding context. The SDIP syntax element at least partially defines a mode by which the CU is partitioned into a set of one or more transform units.03-21-2013
20110058608Method and apparatus for image encoding using hold-MBs, and method and apparatus for image decoding using hold-MBs - In video/image coding, macroblocks (MBs) are often intra coded in raster scan order, starting from one seed MB. The invention improves intra prediction for optimized usage of multi-core processors. Encoding starts from multiple intra coded seed MBs per frame, and continues with adjacent MBs. A predefined prediction spread pattern (growth pattern) is used that comprises simultaneous prediction of two or more adjacent MBs per MB. Adjacent MBs with high coding cost are called “Hold-MB” and can be held from being processed, until another neighbouring edge is available for prediction. Encoding comprises marking a MB with high coding cost for deferred prediction. This MB is skipped while the other MBs are encoded. When a further adjacent MB was encoded, the marked MB is predicted based on the adjacent MBs. Since a decoder receives the deferment marks and uses the same growth pattern, it follows the encoder, and predicts and decodes correctly.03-10-2011
20110058607Video coding - A method of transmitting video, a method of receiving and decoding video, and a corresponding transmitter, receiver and computer program products. The method of transmitting video to one or more recipient terminals comprises: transmitting a stream of inter frame encoded video data to a recipient terminal; during ongoing transmission of the stream to the recipient terminal, receiving a request signal from that recipient terminal; and in response to the request signal, transmitting alternatively encoded video data to the recipient terminal in association with the inter frame encoded video data.03-10-2011
20110058606Latency Rate Distortion Optimisation - There is provided a method of improving latency in a Rate Distortion Optimisation apparatus, comprising re-ordering processing of a sequence of 4×4 blocks of pixels received for processing by the Rate Distortion Optimisation apparatus, the received order of the 4×4 blocks of pixels corresponding to the location of the 4×4 blocks of pixels within a macroblock, and processing the re-ordered sequence of 4×4 blocks in the Rate Distortion Optimisation apparatus, where the re-ordering of the processing of the 4×4 blocks of pixels comprises interleaving the processing of two upper 4×4 blocks of pixels of a current 8×8 block with the processing of two lower 4×4 blocks of pixels of a previous 8×8 block. There is also provided a method of improving latency in a Rate Distortion Optimisation apparatus, where the Rate Distortion Optimisation apparatus assesses nine intra prediction modes and the method further comprises re-ordering processing of intra prediction modes such that a first six modes processed are not dependent on a block of pixels above and to the right of a current block of pixels, and processing the re-ordered sequence of intra prediction modes in the Rate Distortion Optimisation apparatus.03-10-2011
20130058405Video Coding - A method of performing a rate-distortion optimization process comprising, for each of a plurality of target image portions to be encoded in each of a plurality of frames, selecting a preferred one of a set of encoding modes by optimizing a function comprising an estimate of distortion for the target image portion and a measure of bit rate required to encode the target image portion, wherein the estimate of distortion is based on source coding distortion and an estimate of a distortion that would be experienced due to possible loss over the channel; encoding the target image portion into the encoded video stream using the selected encoding mode; and transmitting the encoded video stream over the channel. The rate-distortion optimization process for a current one of the frames is performed in dependence on feedback received from the receiving terminal based on an earlier one of the frames.03-07-2013
20130058407CODING OF TRANSFORM COEFFICIENTS FOR VIDEO CODING - This disclosure describes coding transform coefficients associated with a block of residual video data in a video coding process. Aspects of this disclosure include the selection of a scan order for both significance map coding and level coding, as well as the selection of contexts for entropy coding consistent with the selected scan order. This disclosure proposes a harmonization of the scan order to code both the significance map of the transform coefficients as well as to code the levels of the transform coefficient. It is proposed that the scan order for the significance map should be in the inverse direction (i.e., from the higher frequencies to the lower frequencies). This disclosure also proposes that transform coefficients be scanned in sub-sets as opposed to fixed sub-blocks. In particular, transform coefficients are scanned in a sub-set consisting of a number of consecutive coefficients according to the scan order.03-07-2013
20130058411METHODS AND APPARATUS FOR INTRA CODING A BLOCK HAVING PIXELS ASSIGNED TO GROUPS - Methods and apparatus are provided for intra coding a block having pixels assigned to groups. An apparatus includes a video encoder for encoding a block in a picture using intra prediction by dividing pixels within the block into at least a first group and a second group and encoding the pixels in the first group prior to encoding the pixels in the second group. A prediction for at least one of the pixels within the second group is obtained by evaluating the pixels within the first group and the second group.03-07-2013
20130058410ENCODING DEVICE, DECODING DEVICE, AND DATA STRUCTURE - A video encoding device includes a side information determination section and a side information encoding section. The side information determination section sets a quantization parameter for each macroblock in such a manner that a difference between quantization parameters for each pair of macroblocks with successive encoding orders is equal to one of n difference values, and transforms the difference into one of n indices with respect to each pair. The side information encoding section generates a binary sequence having a length corresponding to the size of the absolute value of the index. The total of absolute values of the n indices is smaller than the total of absolute values of the n difference values.03-07-2013
20130058409MOVING PICTURE CODING APPARATUS AND MOVING PICTURE DECODING APPARATUS - A moving picture coding apparatus includes: a coding unit which codes pictures with reference to decoded pictures of previously coded pictures to generate coded data of the pictures; a transmission unit which transmits the coded data to a moving picture decoding apparatus; and a control unit. When an acknowledgement signal indicating successful receiving of coded data of all of a predetermined number of consecutive pictures is received from a receiver apparatus, the control unit stores, as a key picture in a memory, a decoded picture of a current picture being coded when the acknowledgement signal is received. When a negative-acknowledgement signal indicating unsuccessful receiving of coded data of any of the consecutive pictures is received, the control unit causes the coding unit to code the current picture with reference to a key picture stored in the memory.03-07-2013
20130058408IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image coding method includes: writing, into a sequence parameter set, buffer description defining information for defining a plurality of buffer descriptions; selecting one of the buffer descriptions for each processing unit that is a picture or a slice, and writing buffer description selecting information for specifying the selected buffer description, into a first header of the processing unit which is included in the coded bitstream; and coding the processing unit using the selected buffer description, and the buffer description defining information includes long-term information for identifying, among a plurality of reference pictures indicated in the buffer descriptions, a reference picture to be assigned as a long-term reference picture.03-07-2013
20130058404METHOD OF MOTION PREDICTION OF MULTIMEDIA VIDEO CODING - A method of motion prediction of multimedia video coding includes the steps of a) defining that each of macroblocks of enhancement layers has corresponding BL_Residual, EL_Residual, and EL_Residual03-07-2013
20120307895IMAGE-ENCODING APPARATUS AND METHOD, TRANSFORM-ENCODING APPARATUS AND METHOD, APPARATUS AND METHOD FOR GENERATING A TRANSFORM BASE, AND IMAGE-DECODING APPARATUS AND METHOD USED IN SAME - A video encoding apparatus includes an intra prediction error collector; a transform base generator; an intra predictor; and a transform encoder, the intra prediction error collector collecting prediction errors of blocks having an equal intra prediction mode from macroblocks in a regular unit, which are encoded prior to a current macroblock, the transform base generator generating transform bases for respective intra prediction modes based on the prediction errors collected by the intra prediction error collector. Accordingly, the intra prediction encoding performance can be significantly improved with adding no addition information by adaptively generating a transform base according to an image characteristic change and transform-encoding an intra prediction error. As a result, the compression efficiency of a video compression apparatus or the picture quality of a reconstructed image can be greatly improved.12-06-2012
20130058406PREDICTIVE FRAME DROPPING METHOD USED IN WIRELESS VIDEO/AUDIO DATA TRANSMISSION - A predictive frame dropping method used in wireless video/audio data transmission using a video decoder or a video encoder under compressed domain instead of raw domain is provided. The method drops at least one consecutive P-frame directly in front of each I-frame sequentially in each group of pictures (GOP) for reducing the total amount of cache memory required for frame buffering and avoiding the memory from overflowing either before the data are being decompressed by the video decoder at the receiver side or after being compressed by the video encoder at the transmitter side. A controller for controlling the quantity of number of P-frames to be dropped is provided. The video decoder does not need any off-chip DDR memory. An SRAM can reside in either the video decoder or the video encoder for carrying out the predictive frame dropping method.03-07-2013
20110013694VIDEO QUALITY OBJECTIVE ASSESSMENT METHOD, VIDEO QUALITY OBJECTIVE ASSESSMENT APPARATUS, AND PROGRAM - A bit string of a video encoded using motion-compensated inter-frame prediction and DCT and, more particularly, H.264 is received. A quantization parameter included in the received bit string is extracted, and its statistic is calculated. The subjective quality of the video is estimated based on the minimum value of the quantization parameter.01-20-2011
20090285295VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285293VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090279607Method and apparatus for video coding - In uniform superposition of two predictions toward a weighted superposition, such as in coding B frames, weighting is based on reliability of a reference picture used for determination of the prediction. Since there is a relationship between the reliability and the respective quantization parameter, coupling to the quantization parameter that is also known in the receiver also can be effected advantageously.11-12-2009
20090268816ADVANCED VIDEO CODING TO MULTIVIEW VIDEO CODING TRANSCODER - Systems, methods and computer program products for transcoding advanced video coding (AVC) bitstreams into multiview video coding (MVC) bitstreams are described. In some implementations, a MVC transcoder may be used to convert non-anchor pictures (e.g., at a specified temporal point) into anchor pictures by using only inter-view prediction. The MVC transcoder also may utilize inter-view reference pictures (in addition to temporal reference pictures) in the motion estimation/mode decision functions of the non-anchor pictures. The output of the MVC transcoder may be one or more MVC bitstreams each representing a different view of a same scene or image.10-29-2009
20090268815VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-29-2009
20090268813VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-29-2009
20090268810Geometric intra prediction - The use of parametric models to capture and represent local signal geometry allows a new geometric intra prediction scheme to better encode video images. The encoding scheme gives the video encoder the flexibility and scalability to match the video frame content with the desired computational complexity. It also allows the encoder to encode the images more efficiently using intra prediction because it reduces the artificial edges that occur during standard intra encoding.10-29-2009
20090268809Method, apparatus and system for robust video transmission - A method of transmitting video data related to a sequence of video frames, includes: encoding the video frames according to a first predictive encoding to generate encoded video data, the encoded video data including a prediction error based on the difference between a portion of a current video frame in the sequence and a first predictor thereof based on a first preceding video frame in the sequence; generating auxiliary video data related to the portion of the current video frame; and transmitting the encoded video data and the auxiliary video data to a receiver, the encoded video data being transmitted over a first channel, and the auxiliary video data being transmitted over a second channel. The step of generating auxiliary video data includes calculating a correlation between the first predictor and a predetermined second predictor based on a second preceding video frame in the sequence, the second preceding video frame preceding in the sequence the first preceding video frame.10-29-2009
20120224631METHODS AND DEVICES FOR IMAGE ENCODING AND DECODING, AND CORRESPONDING COMPUTER PROGRAMS - A method and device relate to coding an image split up into partitions, which comprises the selection of at least one mode of coding and of its associated coding information items, from among items placed in competition, the prediction of the data of a current partition, the determination of residual data. Calculation of the value of a function representative of said residual data are performed, then the comparison of said calculated value with a value selected as value of competition index from among the associated values. If the values are equal, said signal transmitted comprises said residual data and said associated coding information items. If not, the residual data determined are modified so that the value of the function representative of the residual data is equal to the selected value of competition index, the signal transmitted comprising the modified residual data, excluding the selected value of competition index.09-06-2012
20120224630METHOD AND APPARATUS FOR PROVIDING PREDICTION MODE FINE GRANULARITY SCALABILITY - In an encoding process, video data are represented as a bitstream of a quantized base layer and at least two enhancement layers, with each picture in each layer identified by a start code. The base layer, plus a number of enhancement layers capable of being transmitted by the communication channel's bandwidth, are transmitted on the communication channel.09-06-2012
20130064295MOTION DETECTION METHOD AND ASSOCIATED APPARATUS - A motion detection method is provided. The method includes steps of: capturing a current frame, generating a current luma frame according to the current frame, generating a foreground binary image according to the current luma frame, a background luma image and a sensitivity, and updating the background luma frame according to an updating frequency and the sensitivity.03-14-2013
20130064294CONTEXT ADAPTIVE ENTROPY CODING FOR NON-SQUARE BLOCKS IN VIDEO CODING - Disclosed are techniques for coding coefficients of a video block having a non-square shape defined by a width and a height, comprising coding one or more of x- and y-coordinates that indicate a position of a last non-zero coefficient within the block according to an associated scanning order, including coding each coordinate by determining one or more contexts used to code the coordinate based on one of the width and the height that corresponds to the coordinate, and coding the coordinate by performing a context adaptive entropy coding process based on the contexts. Also disclosed are techniques for coding information that identifies positions of non-zero coefficients within the block, including determining one or more contexts used to code the information based on one or more of the width and the height, and coding the information by performing a context adaptive entropy coding process based on the contexts.03-14-2013
20130182764IMAGE PROCESSING METHOD AND IMAGE PROCESSING APPARATUS - An image processing method of performing filtering on image blocks using a plurality of deblocking filters having different filter strengths includes: a first parameter calculating step of calculating a first parameter indicating a boundary strength; a second parameter calculating step of calculating a second parameter indicating a limit value for each of the deblocking filters, based on the first parameter and a quantization parameter; and a selecting step of selecting a deblocking filter to be used in the filtering from among the deblocking filters, using one or more threshold values which are determined based on the second parameter.07-18-2013
20130163666Method and System for Illumination Compensation and Transition for Video Coding and Processing - Deriving illumination compensation parameters and detection of illumination dominant transitions types for video coding and processing applications is described. Illumination changes such as fade-ins, fade-outs, cross-fades, and flashes are detected. Detection of these illumination changes is then used for weighted prediction to provide for improved illumination compensation.06-27-2013
20130163664UNIFIED PARTITION MODE TABLE FOR INTRA-MODE CODING - In an example, aspects of this disclosure relate to a method for coding video data that includes predicting a first non-square partition of a current block of video data using a first intra-prediction mode, where the first non-square partition has a first size. The method also includes predicting a second non-square partition of the current block of video data using a second intra-prediction mode, where the second non-square partition has a second size different than the first size. The method also includes coding the current block based on the predicted first and second non-square partitions.06-27-2013
20130064296METHODS AND SYSTEMS FOR IMAGE INTRA-PREDICTION MODE MANAGEMENT - Embodiments of the present invention relate to methods and systems for ordering, communicating and applying pixel intra-prediction modes.03-14-2013
20090257491MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND STREAM DATA - A signal separation unit (10-15-2009
20130101036Sample-Based Angular Intra-Prediction in Video Coding - A method for processing a prediction unit (PU) to generate predicted samples is provided that includes computing predicted samples for samples of the PU using sample-based angular intra-prediction (SAP) when lossless coding is enabled for the PU, and computing predicted samples for the samples of the PU using block-based angular intra-prediction when lossless coding is not enabled for the PU. Computation of the predicted using SAP includes determining an intra-prediction angle for the PU, and computing a predicted sample for each sample of the samples in the PU based on linear interpolation of two reference samples adjacent to the sample, wherein the two reference samples are selected according to the intra-prediction angle.04-25-2013
20090238275VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-24-2009
20090238274VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-24-2009
20090238273VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-24-2009
20090238272VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-24-2009
20090238271APPARATUS AND METHOD FOR ENCODING AND DECODING USING ALTERNATIVE CONVERTER ACCODING TO THE CORRELATION OF RESIDUAL SIGNAL - Provided is an apparatus and method for encoding and decoding using alternative transform units according to the correlation of residual signals. The video encoding apparatus includes a first transforming unit for performing discrete cosine transform (DCT), first quantization, first inverse quantization, and inverse DCT on a block basis onto residual coefficients generated after intra frame prediction or inter frame prediction; a second transforming unit for performing discrete sine transform (DST), second quantization, second inverse quantization, and inverse DST on a block basis onto the residual coefficients; a selecting unit for selecting one having a high compression rate between the first and second transforming units for each block through performing rate-distortion optimization; and a flag marking unit for recording information about the selected transforming unit at a flag bit provided on a macroblock basis.09-24-2009
20090238270Apparatus and method for modifying predicted values, and decoding system - An apparatus for modifying predicted values in a predicted image for input to a decoder starts by taking the most significant information bit plane from the predicted image and submitting it to the decoder to be decoded. Subsequent information bit planes are then taken in descending order and submitted to the decoder, but first each of these information bit planes is modified at the locations of prediction errors identified in the preceding information bit plane by comparing that information bit plane with the corresponding decoded bit plane. The modifications improve the general accuracy of the decoded image, enabling the decoder to decode the bit planes with less additional coded information than would otherwise be required. The apparatus is useful in distributed video coding systems.09-24-2009
20090238269Method and Apparatus for Decoupling Frame Number and/or Picture Order Count (POC) for Multi-View Video Encoding and Decoding - There is disclosed and described a decoder and decoding method for decoding at least one picture corresponding to at least one of at least two views of multi-view video content from a bitstream, wherein in the bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds. Furthermore, there is disclosed and described an encoder and encoding method for encoding at least one picture corresponding to at least one of at least two views of multi-view video content to form a resultant bitstream, wherein in the resultant bitstream at least one of coding order information and output order information for the at least one picture is decoupled from the at least one view to which the at least one picture corresponds.09-24-2009
20090238268METHOD FOR VIDEO CODING - A method for video coding is provided. The method comprises retrieving a video frame and at least one reference frame, determining a search window size according to the number of the at least one reference frame, performing prediction encoding on the video frame according to the number of the at least one reference frame and the search window size to obtain coding information and determining another search window size and a number of reference frames according to the coding information.09-24-2009
20130128969EXPLICIT WAY FOR SIGNALING A COLLOCATED PICTURE FOR HIGH EFFICICENCY VIDEO CODING (HEVC) USING REFERENCE LIST0 AND LIST1 - A system is provided for determining a collocated reference picture to enable encoding and decoding of a current picture for high efficiency video coding (HEVC). The collocated picture is identified by accessing syntax that can include an index for a list0 and a list1, a reference picture set number indicating the number of pictures in list0 and list1, and a flag indicating if the collocated picture is in list0 or list1. The system can further use slice type to determine if both list0 and list1 should be accessed.05-23-2013
20090232209VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-17-2009
20090232208METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - Provided are a method and an apparatus for encoding and decoding an image to improve the efficiency for predicting an image by reducing discontinuity between prediction blocks by performing filtering on a prediction picture. The method of encoding an image includes generating filtered prediction pixel values by performing filtering in which a weighted sum of prediction pixels of a prediction picture with respect to peripheral prediction pixels is calculated, and encoding a difference value between the filtered prediction picture comprising the filtered prediction pixel values and a current picture.09-17-2009
20090232206IMAGE PREDICTION ENCODING DEVICE, IMAGE PREDICTION DECODING DEVICE, IMAGE PREDICTION ENCODING METHOD, IMAGE PREDICTION DECODING METHOD, IMAGE PREDICTION ENCODING PROGRAM, AND IMAGE PREDICTION DECODING PROGRAM - An image predictive encoding device including an intra frame predictive signal generation method determination section that determines, for adjacent areas including regenerated pixel signals and adjacent to the target area, a predictive method derived on the basis of data corresponding to the adjacent areas as an R mode predictive method or an L mode predictive method, an intra frame predictive signal generation section that generates an intra frame predictive signal on the basis of the R mode predictive method thus determined, and a subtractor, a transform section, a quantization section, and an entropy encoding section that encode a residual signal of a pixel signal of the target area on the basis of the generated intra frame predictive signal.09-17-2009
20090046781MOVING IMAGE CODING APPARATUS AND MOVING IMAGE DECODING APPARATUS - A macro block size determining unit 02-19-2009
20090016435REPLACEMENT OF FRAME DATA IN A VIDEO STREAM SIGNAL - An apparatus processes a video stream signal. The video stream signal represents a succession of frames, comprising a plurality of dependent frames that each provide for prediction of visual content using selectable ones of a preceding and following anchor frame that precede and follow the plurality of frames respectively. When a shortage of transmission bandwidth occurs, the apparatus generates a processed version of the video stream signal wherein a bit-rate alteration is performed starting from one of the dependent frames before an end of said plurality. Said alteration is executed by substituting a standard prediction from the following anchor frame at least for data in the video stream signal that encodes a region in said one of the dependent frames. The bit rate alteration is accompanied by a switch to a mode in which the processing circuit substitutes a standard prediction from the following anchor frame in all following dependent frames that follow said one of the dependent frames until the following anchor frame, for data in the video stream signal that encodes the region in said following dependent frames. In an embodiment interlacing is killed for the replaced regions.01-15-2009
20120230402CONTEXT REDUCTION FOR LAST TRANSFORM POSITION CODING - A context reduced last transform (CRLT) coding technique which enhances parallel context processing, such as utilized in JCTVC-D262, to reduce complexity by reducing the number of context models using for coding the position of the last significant transform coefficient. Selected context models are removed and additional bins are shared which reduce the number of contexts required. In one benchmark test for YUV 4:2:0 video, the number of context models were reduced from 120 for the proposed entropy encoding of JCTVC-D262 test model HM 2.0, versus 82 context models required for CRLT coding.09-13-2012
20090010332Method and Apparatus for Decoding/Encoding a Video Signal - A method of decoding a current layer using inter-layer prediction is disclosed. The present invention includes obtaining a first flag information indicating whether a current block of the current layer is coded using the inter-layer prediction, obtaining a quality identification information identifying a quality of the current block, obtaining a second flag information based on the first flag information and the quality identification information, the second flag information indicating whether a reference block is included in a specific slice of a reference layer, and decoding the current block based on the second flag information.01-08-2009
20090010331Method and Apparatus for Decoding/Encoding a Video Signal - A method of decoding a video signal is disclosed. The present invention includes decoding a bit stream of a first layer, obtaining a flag information indicating whether inter-layer prediction is carried out on a current block of a second layer, obtaining at least one offset information indicating a position difference between an up-sampled picture of the first layer used for the inter-layer prediction and a current picture of the second layer based on the flag information, and up-sampling a reference picture of the first layer using at least the one offset information.01-08-2009
20090010330Method and Apparatus for Adaptive Weight Selection for Motion Compensated Prediction - There are provided a method and apparatus for adaptive weight selection for motion compensated prediction. The apparatus includes an encoder for encoding a picture by deriving a set of weighting parameters, selecting at least one weighting parameter in the set based upon a selection criteria, and applying the selected at least one weighting parameter to a reference picture used to encode the picture.01-08-2009
20090010329Encoding Device, Encoding Method, and Computer Program for Encoding - A closed GOP is arranged at a plurality of positions in a video data string (01-08-2009
20120114038METHOD AND APPARATUS FOR ENCODING AND DECODING VIDEO SIGNAL ACCORDING TO DIRECTIONAL INTRA RESIDUAL PREDICTION - A method and apparatus for encoding and decoding a video signal according to directional intra-residual prediction. The video encoding method of the present invention includes calculating first residual data by performing directional intra-prediction on a first block of a base layer with reference to a second block of the base layer, calculating second residual data by performing directional intra-prediction on a third block of an enhancement layer that corresponds to the first block of the base layer with reference to a fourth block of the enhancement layer that corresponds to the second block of the base layer, and encoding the third block according to the directional intra-residual prediction by obtaining third residual data that is a difference between the first residual data and the second residual data.05-10-2012
20120114037COMPRESSING AND DECOMPRESSING MULTIPLE, LAYERED, VIDEO STREAMS EMPLOYING MULTI-DIRECTIONAL SPATIAL ENCODING - A process for compressing and decompressing non-keyframes in sequential sets of contemporaneous video frames making up multiple video streams where the video frames in a set depict substantially the same scene from different viewpoints. Each set of contemporaneous video frames has a plurality frames designated as keyframes with the remaining being non-keyframes. In one embodiment, the non-keyframes are compressed using a multi-directional spatial prediction technique. In another embodiment, the non-keyframes of each set of contemporaneous video frames are compressed using a combined chaining and spatial prediction compression technique. The spatial prediction compression technique employed can be a single direction technique where just one reference frame, and so one chain, is used to predict each non-keyframe, or it can be a multi-directional technique where two or more reference frames, and so chains, are used to predict each non-keyframe.05-10-2012
20120114036Method and Apparatus for Multiview Video Coding - The present invention relates to method and apparatus for multiview video coding. In particular, the present invention describes a disparity compensated prediction to exploit the inter-view correlation in multiview video coding by providing stretching, compression, and shearing (SCSH) disparity compensation to approximate the actual disparity effects in addition to the translational disparity. A sub-sampled block-matching disparity estimation technique is provided to implement the SCSH disparity compensation which makes use of the interpolated reference frames for subpixel motion and disparity estimation in conventional hybrid video coding structure.05-10-2012
20100086028VIDEO ENCODING AND DECODING METHOD AND APPARATUS - A video encoding apparatus includes a predictor to perform prediction for an input image signal to generate a prediction image signal, a subtractor to calculate a difference between the input image signal and the prediction image signal to generate a prediction residual signal, a transformer to transform the prediction residual signal to generate a transform coefficient, a modulating unit to perform modulation on a quantization matrix to obtain a modulated quantization matrix, a quantizer to quantize the transform coefficient using the modulated quantization matrix to generate a quantized transform coefficient, and an encoder to encode the quantized transform coefficient and a modulation index to generate encoded data.04-08-2010
20100086029VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels, for example, 64×64 pixels. In one example, an apparatus includes a video encoder configured to encode a video block having a size of more than 16×16 pixels, generate block-type syntax information that indicates the size of the block, and generate a coded block pattern value for the encoded block, wherein the coded block pattern value indicates whether the encoded block includes at least one non-zero coefficient. The encoder may set the coded block pattern value to zero when the encoded block does not include at least one non-zero coefficient or set the coded block pattern value to one when the encoded block includes a non-zero coefficient.04-08-2010
20100086032VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels. In one example, an apparatus includes a video encoder configured to encode a coded unit comprising a plurality of video blocks, wherein at least one of the plurality of video blocks comprises a size of more than 16×16 pixels and to generate syntax information for the coded unit that includes a maximum size value, wherein the maximum size value indicates a size of a largest one of the plurality of video blocks in the coded unit. The syntax information may also include a minimum size value. In this manner, the encoder may indicate to a decoder the proper syntax decoder to apply to the coded unit.04-08-2010
20100086039VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20100086044VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20100086046VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20090285294VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20130163667VIDEO STREAMING - The network contains one or more network based video servers connected to one or more video receivers over a shared network. Multiple pieces of video content are each encoded at a number of constant quality levels and stored on one or more of the network based servers. In response to requests from a receiver, video content is selected on a server and delivered over the shared network to the receiver. The system selects the quality level of the stream to deliver based on characteristics of the video stream currently being delivered, and the number of bits already buffered at the video receiver and the available network throughput. The aim is to select the video quality being delivered according to the available network throughput so as maximise the quality while ensuring that all video data is delivered over the network in time for it to be decoded and displayed without interruption. The invention proposes a method for making that selection in advance.06-27-2013
20120236938METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE BY USING LARGE TRANSFORMATION UNIT - Disclosed are an image encoding method and apparatus for encoding an image by grouping a plurality of adjacent prediction units into a transformation unit and transforming the plurality of adjacent prediction into a frequency domain, and an image decoding method and apparatus for decoding an image encoded by using the image encoding method and apparatus.09-20-2012
20130163663IMPLICIT DETERMINATION OF COLLOCATED PICTURE FOR TEMPORAL PREDICTION - In one embodiment, a method determines a block of a current picture and a prediction type associated with the block. Also, the method determines one of a first list of reference pictures and a second list of reference pictures for the block. An encoder or a decoder selects the one of the first list of reference pictures or the second list of reference pictures implicitly without communication of information between the encoder and the decoder indicating which of the first list of reference pictures or the second list of reference pictures was selected. Then, the method sets a reference picture in the selected one of the first list of reference pictures and the second list of reference pictures as a collocated picture for the block. The selected reference picture is used in a temporal prediction process for the block.06-27-2013
20130128966Scanning of Prediction Residuals in High Efficiency Video Coding - A video codec comprising a processor configured to generate a prediction block for a current block, compute a difference between the current block and the prediction block to generate a residual block, scan a plurality of prediction residuals located in the residual block following a scanning order, and if the plurality of residual values comprise at least one non-zero prediction residual, entropy encode the at least one non-zero prediction residual. A method comprising generating a prediction block for a current block, computing a difference between the current block and the prediction block to generate a residual block, scanning a plurality of prediction residuals located in the residual block, and if the plurality of residual values comprise at least one non-zero prediction residual, entropy encoding the at least one non-zero prediction residual.05-23-2013
20110249731Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. The pixel values for a block within a first set of blocks may be predicted using reconstructed values from only neighboring macroblocks. The pixel values for a block within another set of blocks may be subsequently predicted using reconstructed values from blocks in previously reconstructed sets of blocks and/or reconstructed values from neighboring macroblocks. The pixel values for blocks within a set of blocks may be predicted in parallel.10-13-2011
20100067574VIDEO DECODING METHOD AND VIDEO ENCODING METHOD - The present invention prevents coding artifacts caused in applying image enhancement technologies to pictures that have been encoded and then decoded. A video decoder (03-18-2010
20100014585METHOD AND SYSTEM FOR ENCODING A VIDEO SIGNAL, ENCODED VIDEO SIGNAL, METHOD AND SYSTEM FOR DECODING A VIDEO SIGNAL - Some video compression standards use multiple temporal predictions. One or more of the oldest temporal predict ions are overwritten with another prediction. A prediction used in an enhancement encoder is in embodiment overwritten by a prediction produced in a base stream encoder.01-21-2010
20100014584Methods circuits and systems for transmission and reconstruction of a video block - Disclosed is a method, circuit and system for transmission and reconstruction of a video block. A video stream may be composed of sequential video frames, and each video frame may be composed of one or more video blocks including a set of pixels. Prior to transmission of the data associated with a video block, the video block data may be transformed into a set of transform (e.g. frequency) coefficients using a spatial to frequency transform such as a two dimensional discrete cosine transform. Selection of the subset of transform coefficients to be transmitted may be based on a characteristic of the video block.01-21-2010
20100034263VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-11-2010
20100027638VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20110280305IMAGE PROCESSING DEVICE, DECODING METHOD, INTRA-FRAME DECODER, METHOD OF DECODING INTRA-FRAME AND INTRA-FRAME ENCODER - Adopted is a decoder, in which on condition that a prediction block shown by vector information extracted from a data stream, and a decode-target block have an overlap where respective pixels overlay each other, pixel information of an already-decoded portion at a distance of an integer multiple of a vector provided by the vector information from the overlap is made a prediction signal instead of the overlap, and the prediction signal is added to difference image data taken from the data stream to generate reproduction image data. The decoder is adopted for an intra-frame decoder, a local decoder of an encoder, and the like. According to a fundamental rule concerning a repetitive pattern of an image, a pixel at a distance of an integer multiple is a like pixel, and therefore the process of decoding can be performed efficiently.11-17-2011
20110280304INTRA PREDICTION MODES - New intra angular prediction modes and methods for decoding are offered for providing greater accuracy when processing predictions of digital video data blocks. One new method considers predicting a current prediction sample by taking the linear interpolation of two previously reconstructed reference samples that lay along a common angular line. Another new method offers a method for making previously unavailable samples from a neighboring block available as reference samples when predicting a current prediction sample. Another new method considers a new combined intra prediction mode that utilizes a local mean to predict a current prediction sample. And a new decoding method offers to rearrange the order in which video data blocks are predicted based on the intra prediction mode used for predicting the video data blocks.11-17-2011
20130022113SLICE HEADER PREDICTION FOR DEPTH MAPS IN THREE-DIMENSIONAL VIDEO CODECS - In one example, a video coder is configured to code a first slice, wherein the first slice comprises one of a texture slice and a corresponding depth slice, wherein the first slice has a slice header comprising complete syntax elements representative of characteristics of the first slice. The video coder is further configured to determine common syntax elements for a second slice from the slice header of the first slice. The video coder is also configured to code the second slice after coding the first slice at least partially based on the determined common syntax elements, wherein the second slice comprises one of the texture slice and the depth slice that is not the first slice, wherein the second slice has a slice header comprising syntax elements representative of characteristics of the second slice, excluding values for syntax elements that are common to the first slice.01-24-2013
20090135908VIDEO FRAME ENCODING AND DECODING - A video frame arithmetical context adaptive encoding and decoding scheme is presented which is based on the finding, that, for sake of a better definition of neighborhood between blocks of picture samples, i.e. the neighboring block which the syntax element to be coded or decoded relates to and the current block based on the attribute of which the assignment of a context model is conducted, and when the neighboring block lies beyond the borders or circumference of the current macroblock containing the current block, it is important to make the determination of the macroblock containing the neighboring block dependent upon as to whether the current macroblock pair region containing the current block is of a first or a second distribution type, i.e., frame or field coded.05-28-2009
20100195721LOCAL PICTURE IDENTIFIER AND COMPUTATION OF CO-LOCATED INFORMATION - Video decoding innovations for using local picture identifiers and computing co-located information are described. In one aspect, a decoder identifies reference pictures in a reference picture list of a temporal direct prediction mode macroblock that match reference pictures used by a co-located macroblock using local picture identifiers. In another aspect, a decoder determines whether reference pictures used by blocks are the same by comparing local picture identifiers during calculation of boundary strength. In yet another aspect, a decoder determines a picture type of a picture and based on the picture type selectively skips or simplifies computation of co-located information for use in reconstructing direct prediction mode macroblocks outside the picture.08-05-2010
20090086817IMAGE ENCODING APPARATUS AND IMAGE ENCODING METHOD - An image capturing apparatus 04-02-2009
20110142126LOW BIT RATE CODEC - The present invention relates to improvements of predictive encoding/decoding operations performed on a signal which is transmitted over a packet switched network. The signal is encoded on a block by block basis in such way that a block A-B is predictive encoded independently of any preceding blocks. A start state 06-16-2011
20120014439PARALLEL VIDEO CODING BASED ON SCAN ORDER - A system encoding and decoding video that uses a parallel encoding and decoding technique.01-19-2012
20120189054Apparatus and Method for Coding Picture Data - A coding apparatus for hierarchically (layered data) coding two field data associated with each of a plurality of picture data composing a moving picture image. The coding apparatus comprising: a first coding unit configured to encode one of the two field data; a conversion unit configured to interpolate first predicted image data generated by the first coding unit encoding the one of the two field data and generate second predicted image data of a scanning position of the other field data of the two field data; and a second coding unit configured to encode the other field data of the two field data based on the second predicted image data generated by the conversion unit.07-26-2012
20130022112FILTERING METHOD, MOVING PICTURE DECODING METHOD, MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING APPARATUS, MOVING PICTURE CODING APPARATUS, AND MOVING PICTURE CODING AND DECODING APPARATUS - A filtering method is for performing deblocking filtering on the boundary between an IPCM block and a non-IPCM block adjacent to each other in an image and including: determining a first quantization parameter for the non-IPCM block; determining a second quantization parameter for the IPCM block, using the first quantization parameter; determining a filter strength for the boundary, using the first quantization parameter and the second quantization parameter; and performing the deblocking filtering on the boundary using the determined filter strength.01-24-2013
20120099647METHOD AND APPARATUS FOR VARIABLE ACCURACY INTER-PICTURE TIMING SPECIFICATION FOR DIGITAL VIDEO ENCODING - A method and apparatus for variable accuracy inter-picture timing specification for digital video encoding is disclosed. Specifically, the present invention discloses a system that allows the relative timing of nearby video pictures to be encoded in a very efficient manner. In one embodiment, the display time difference between a current video picture and a nearby video picture is determined. The display time difference is then encoded into a digital representation of the video picture. In a preferred embodiment, the nearby video picture is the most recently transmitted stored picture. For coding efficiency, the display time difference may be encoded using a variable length coding system or arithmetic coding. In an alternate embodiment, the display time difference is encoded as a power of two to reduce the number of bits transmitted.04-26-2012
20120099645METHOD AND APPARATUS FOR NON-LINEAR DECODING OF VIDEO FRAMES OF A VIDEO STREAM ENCODED USING AN INTRA MACROBLOCK REFRESH PROCESS - A video decoder system receives a user request for non-linear decoding of at least one video frame from a video stream encoded using an Intra macroblock refresh process. The request includes a first frame offset corresponding to a user requested first decoding frame within the video stream for commencing the non-linear decoding. The decoder system: determines an Intra-refresh period corresponding to at least one encoded Predictive frame in the video stream during which all macroblocks in the user requested first decoding frame are Intra encoded at least once; determines a second frame offset as a function of the Intra-refresh period and the user requested first frame offset, the second frame offset corresponding to a second decoding frame within the video stream. Finally, the decoder system decodes the video stream starting at the second decoding frame and suppresses the display of the video stream until the first decoding frame.04-26-2012
20120106634METHOD AND APPARATUS FOR PROCESSING MULTI-VIEW VIDEO SIGNAL - Disclosed is a method of processing a video signal. the present invention includes obtaining inter-view reference flag information on a picture of a base view, if the picture of the base view is used for an inter-view prediction in accordance with the inter-view reference flag information, obtaining picture coding structure flag for the picture of the base view, generating a reference picture list for the inter-view prediction based on the picture coding structure flag, and predicting a pixel value of a picture of a non-base view using the reference picture list for the inter-view prediction. Accordingly, the present invention defines profile information indicating a stereo video, thereby coding a multiview video signal more efficiently. The present invention re-defines an access unit, thereby performing inter-view prediction without being restricted by a coding format of an inter-view reference picture in decoding a stereo video.05-03-2012
20110286522SELECTING ENCODING TYPES AND PREDICTIVE MODES FOR ENCODING VIDEO DATA - In some embodiments, a method of determining encoding type and predictive mode(s) selections for a macroblock of a video frame is provided. In some embodiments, a general method 1) selects the encoding type (16×16 or 4×4) that is initially considered for a macroblock using an encoding type selection algorithm (based on an attribute of the macroblock that is easy to compute), 2) if the 16×16 encoding type is selected in step 1, consider the four 16×16 prediction modes that may be used on the macroblock using conventional methods or an improved 16×16 predictive mode search algorithm based on distortion thresholds, and 3) if the 4×4 encoding type is selected in step 1, select the 4×4 prediction mode to be used for each of the sixteen 4×4 blocks of the macroblock using conventional methods or an improved 4×4 predictive mode search algorithm based on the positional relationships between predictive modes.11-24-2011
20110286521METHOD AND DEVICE FOR ENCODING AN IMAGE USING A PREDICTION MASK DECODING METHOD AND DEVICE AND CORRESPONDING SIGNALS AND COMPUTER PROGRAMS - A method is provided for encoding at least one image, divided into macroblocks, one macroblock including a set of blocks de pixels. The method includes, for at least one current macroblock of a current image, at least two iterations of the following steps: allocation of a priority level for encoding to at least one pixel of the current macroblock, selection of a pixel with the highest priority level called the priority pixel, prediction of a set of pixels including the priority pixel and a step of encoding a remainder from prediction for a region made up of predicted pixels of the macroblock, called the predicted region, the encoding step being used as and when the predicted region meets a predetermined encoding criterion.11-24-2011
20110286520METHODS AND APPARATUS FOR IMPLICIT AND SEMI-IMPLICIT INTRA MODE SIGNALING FOR VIDEO AND DECODERS - Methods and apparatus are provided for implicit and semi-implicit intra mode signaling for video encoders and decoders. An apparatus includes an encoder for encoding picture data for at least a portion of a picture. The encoder derives an intra mode to apply to the portion from neighboring template data and abstains from explicitly signaling the intra mode for the portion. The neighboring template data corresponds to a neighboring template formed from neighboring pixels with respect to the portion.11-24-2011
20100254453INVERSE TELECINE TECHNIQUES - This disclosure describes inverse telecine techniques that are performed to adjust or convert the frame rate of a video sequence. The described techniques provide a very useful way to identify a telecine technique that was used to increase the frame rate of a video sequence. Upon identifying the telecine technique that was used, the corresponding inverse telecine technique can be performed with respect to the sequence of video frames in order to decrease the frame rate back to its original form (prior to telecine). This disclosure also provides many useful details that can improve inverse telecine, e.g., by simplifying the inverse telecine process and by reducing memory accesses during the process.10-07-2010
20120014438PARALLEL VIDEO CODING BASED ON PREDICTION TYPE - A system encoding and decoding video that uses a parallel encoding and decoding technique.01-19-2012
20110293001NEW PLANAR PREDICTION MODE - New intra planar modes are introduced for predicting digital video data. As part of the new intra planar modes, various methods are offered for predicting a first sample within a prediction unit, where the first sample is needed for referencing to when processing the new intra planar modes. And once the first sample is successfully predicted, the new intra planar modes are able to predict a sample of video data within the prediction unit by processing a bi-linear interpolation of four previously reconstructed reference samples.12-01-2011
20110293002METHODS AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING - There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block.12-01-2011
20110292999SUPER MACRO BLOCK BASED INTRA CODING METHOD AND APPARATUS - Provided are technologies that may perform intra coding of a super macro block that is an enlarged macro block. In this case, the super macro block is handled as a single entity or may be divided into a plurality of macro blocks. The present invention may perform intra coding both when the super macro block is handled as the single entity and when the super macro block is divided into the plurality of macro blocks.12-01-2011
20110293000IMAGE PROCESSOR, IMAGE DISPLAY APPARATUS AND IMAGE PROCESSING METHOD - In one embodiment, an image processor includes: a decoder configured to decode a coded moving image signal, and generate a decoded moving image signal; an output module configured to output a picture type of a field or a frame of the decoded moving image signal; a detector configured to detect an inter-frame difference of the field or the frame of the decoded moving image signal at least every time the output picture type is changed; a flicker reduction module configured to reduce flicker noise included in the decoded moving image signal by using the decoded moving image signal of a plurality of the fields and frames; and a controller configured to control a strength of the reduction effect of the flicker noise with respect to the field or the frame of a same picture type as the changed picture type based on the inter-frame difference.12-01-2011
20090285292VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090103614Picture coding method and picture decoding method - A picture coding apparatus (04-23-2009
20090103615Simplified Inter-layer Motion Prediction for Scalable Video Coding - The invention relates to a method for determining for a high layer macroblock that uses inter-layer prediction a partitioning of the macroblock in partitions. It comprises the following steps: —dividing the high layer macroblock in non-overlapping high layer blocks of a predefined size; —determining a corresponding base layer pixel for one pixel, called reference pixel, of each high layer block; —identifying, for each reference pixel, a base layer macroblock to which the corresponding base layer pixel belongs, a base layer partition to which the corresponding base layer pixel belongs in the identified base layer macroblock, a base layer sub-partition to which the corresponding base layer pixel belongs in the identified base layer partition if the sub-partition exists; —deriving, for each of the high layer block, a single value, called Part Info value; and —determining a partitioning of the high layer macroblock in macroblock partitions by comparing between them the Part Info values associated with each of the high layer blocks.04-23-2009
20090103613Method for Decoding Video Signal Encoded Using Inter-Layer Prediction - A method for receiving and decoding an encoded bitstream of a first layer and an encoded bitstream of a second layer into a video signal is provided. It is determined whether or not a block temporally coincident with a target block in a picture of the first layer is present in the bitstream of the second layer. An operation for checking information (intra_base_flag and residual_pediction_flag) indicating whether or not the target block has been predicted based on data of a block in a different layer corresponding to the target block is skipped if no block temporally coincident with the target block is present in the bitstream of the second layer. This method eliminates the need for encoders to transmit unnecessary information (intra_base_flag and residual_prediction_flag) when performing inter-layer prediction using a temporally adjacent frame.04-23-2009
20090034616PICTURE CODING METHOD AND PICTURE DECODING METHOD - The method includes the following units: a coefficient number detecting unit (02-05-2009
20100034260VIDEO ENCODING METHOD AND DECODING METHOD, APPARATUSES THEREFOR, PROGRAMS THEREFOR, AND STORAGE MEDIA WHICH STORE THE PROGRAMS - A video encoding method for generating, based on disparity information between an already-encoded reference camera image and an encoding target camera image corresponding to the reference camera image, a disparity-compensated image by means of inter-camera image prediction; and encoding a differential image between the encoding target camera image and the disparity-compensated image. The method includes selecting, for each predetermined section unit on the differential image, one of a decoded differential image group obtained by decoding a differential image between the already-encoded camera image and the disparity-compensated image and a decoded camera image group obtained by decoding the already-encoded camera image, by determining whether or not there is a disparity-compensated image at the corresponding position, that is, whether or not the corresponding pixel in the disparity-compensated image has an effective value.02-11-2010
20110222601MOVING IMAGE ENCODING AND DECODING SYSTEM - A moving image encoding and decoding system reduces compressed moving picture data amounts by producing a prediction signal suitable for moving pictures including dynamic textures. The system includes a moving picture encoding device 09-15-2011
20100034264VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-11-2010
20100034262VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-11-2010
20100034261VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-11-2010
20100027622Methods and apparatus for efficient first-pass encoding in a multi-pass encoder - There are provided methods and apparatus for efficient first-pass encoding in a multi-pass encoder. An apparatus includes a multi-pass video encoder for performing a first-pass encoding of input image data for at least one picture by sub-sampling at least a portion of the input image data prior to the first-pass encoding. The sub-sampling is at least one of spatial sub-sampling and temporal sub-sampling.02-04-2010
20100027628VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027627VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027623METHOD AND DEVICE FOR OPTIMIZING THE COMPRESSION OF A VIDEO STREAM - The purpose of the invention is to enable, or not enable, motion compensation depending on whether it is profitable to do so, with profitability being expressed in terms of the costs in rate and in distortion.02-04-2010
20100027635VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027637VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027636VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027626VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20120189053COMBINED REFERENCE PICTURE LIST CONSTRUCTION FOR VIDEO CODING - This disclosure relates to techniques for constructing a combined reference picture list, List C, based on List 07-26-2012
20120189051METHODS AND APPARATUS FOR DEBLOCKING FILTERING OF NON-LOCAL INTRA PREDICTION - Methods and apparatus are provided for deblocking filtering on non-local intra prediction. An apparatus includes an encoder for encoding picture data using non-local intra prediction. The encoder includes a deblocking filter configured for use with non-local intra prediction modes so as to deblock filter at least a portion of the picture data encoded using the non-local intra prediction.07-26-2012
20120189052SIGNALING QUANTIZATION PARAMETER CHANGES FOR CODED UNITS IN HIGH EFFICIENCY VIDEO CODING (HEVC) - In one example, this disclosure describes a method of decoding video data. The method comprises receiving a coding unit (CU) of encoded video data. The CU is partitioned into a set of block-sized coded units (CUs) according to a quadtree partitioning scheme, and decoding one or more syntax elements for the CU to indicate a change in a quantization parameter for the CU relative to a predicted quantization parameter for the CU only if the CU includes any non-zero transform coefficients. The one or more syntax elements are decoded from a position within the encoded video data after an indication that the CU will include at least some non-zero transform coefficients, and before the transform coefficients for the CU.07-26-2012
20090245359VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245353METHOD AND APPARATUS FOR INTRA-PREDICTION VIDEO CODING/DECODING - An intra-prediction coding and decoding method is provided, in which a picture to be encoded is received in coding units, each of the coding units is divided into a plurality of sub-units, an IPM is determined for each coding unit, residual data is acquired for each sub-unit of each coding unit according to the determined IPM, and information about the IPM of each coding unit and the residual data of each sub-unit of each coding unit are encoded.10-01-2009
20110261881METHOD AND APPARATUS FOR TRANSMITTING A CODED VIDEO SIGNAL - A method and apparatus for transmitting a digitally encoded video image in real time via a data network wherein the video image is digitally encoded using a compression algorithm having a variable bit rate, e.g., JPEG2K, to provide an encoded data stream, the encoded data stream is fed into a buffer of known size, and the data is read from the buffer via a streamer with a controllable bit rate to provide a bit stream at a desired stream bit rate for transmission via the network. The bit rate of the encoded data stream from the encoder is monitored by a predictor and predicts a future bit rate of the encoded data stream; and, the bit rate of at least one of the encoder and the streamer is adjusted to provide the desired streaming bit rate.10-27-2011
20090245366VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090060034Method and apparatus for scalably encoding and decoding video signal - In one embodiment, the method includes predicting at least a portion of a current image in a current layer based on at least a residual coded portion of a base image in a base layer, a reference image, shift information for samples in the predicted current image, and offset information indicating a position offset between at least one boundary pixel of the reference image and at least one boundary pixel of the current image. The residual coded portion represents difference pixel data.03-05-2009
20110194602METHOD AND APPARATUS FOR SUB-PIXEL INTERPOLATION - There is provided a method and apparatus for decoding an encoded video stream. The method comprises receiving an indication of a motion vector for a current picture, the motion vector referring to a previously decoded picture. The method also comprises applying a mask, the mask defining a subset of sub-pixel positions of the previously decoded picture which may be referenced by the motion vector for the current picture. The method further comprises identifying at least one pixel value for the current picture by referring to the value of at least one pixel in an allowed pixel position of the previously decoded picture.08-11-2011
20100091843Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining identification information representing the multi-view video data stream including initialization information of a reference picture list for the random access slice, obtaining initialization information of a reference picture list for the random access slice based on the identification information, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list using the view number information and the view identification information, obtaining modification information for the intitialized reference picture list from a multi-view video data stream, the modification information representing how to assign an inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the modification information, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header.04-15-2010
20100091844Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list for inter-view prediction by appending an inter-view reference index to an initialized reference picture list for temporal prediction, the inter-view reference index being appended based on the view number information and the view identification information, obtaining modification information for the intitialized reference picture list from a multi-view video data stream, the modification information representing how to assign an inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the modification information, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header.04-15-2010
20100091848VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100091851VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100091852VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100091855VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100091856VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20090147846SCALABLE PREDICTIVE CODING METHOD AND APPARATUS - A scalable predictive coder in which the current frame of data is predicted at the enhancement-layer by processing and combining the reconstructed signal at: (i) the current base-layer (or lower layers) frame; and (ii) the previous enhancement-layer frame. The combining rule takes into account the compressed prediction error of the base-layer, and the parameters used for its compression.06-11-2009
20120140822VIDEO CODING USING FUNCTION-BASED SCAN ORDER FOR TRANSFORM COEFFICIENTS - Video coding devices and methods use a function-based definition of scan order to scan transform coefficients associated with a block of residual video data. A video coder may define a scan order for coefficients based on a predefined function and one or more parameter values. A video encoder may use a function-based scan order to scan a two-dimensional array of coefficients to produce a one-dimensional array of coefficients for use in producing encoded video data. The video encoder may signal the parameters to a video decoder, or the video decoder may infer one or more of the parameters. The video decoder may use the function-based scan order to scan a one-dimensional array of coefficients to reproduce the two-dimensional array of coefficients for use in producing decoded video data. In each case, the scan order may vary according to the parameter values, which may include block size, orientation, and/or orientation strength.06-07-2012
20100118947DECODER FOR SELECTIVELY DECODING PREDETERMINED DATA UNITS FROM A CODED BIT STREAM - A decoder (05-13-2010
20090316781PICTURE CODING METHOD - A picture coding method according to the present invention includes: a coding step (S12-24-2009
20090310674METHOD AND DEVICE FOR CODING A SEQUENCE OF IMAGES - The method of coding a sequence of images comprising at least one group of a plurality of original images, in several scalability layers, comprises, to code said group of original images, a step of coding at least one base layer on the basis of the group of original images to code to constitute an intermediate data stream.12-17-2009
20100118952VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-13-2010
20100118941FRAME ACCURATE SWITCHING - A system comprising a decoder arrangement to decode a plurality of video sequences including a first video sequence and a second video sequence, each of the video sequences including a plurality of frames including a first plurality of reference frames and a second plurality of non-reference frames, a selector operationally connected to the decoder arrangement, the selector being operative to select which of the video sequences is outputted to a display device for display, wherein during at least some of the time while the decoder arrangement is decoding the second video sequence which is selected for output to the display device, the decoder arrangement is operative to selectively decode the first video sequence, and then the selector is operative to switch to selecting the first video sequence for outputting to the display device for display. Related apparatus and methods are also described.05-13-2010
20100118953VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-13-2010
20100118951VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-13-2010
20100118950VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-13-2010
20100118949VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-13-2010
20100118946VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-13-2010
20100118944PICTURE INFORMATION CODING DEVICE AND CODING METHOD - In a picture information coding device for outputting picture compression information based on an AVC encoding scheme, optimum reference relationships in a GOP structure including hierarchical B pictures can be obtained and random access from an I picture that is not an instantaneous decoding refresh picture can be performed.05-13-2010
20100118938ENCODER AND METHOD FOR GENERATING A STREAM OF DATA - A method generates a stream of data, wherein the stream comprises a plurality of encoded data blocks. The encoded data blocks comprise a plurality of self-contained blocks including all information for decoding the block and a plurality of blocks including only partial information for decoding. The distance of the self-contained blocks in the stream is varied dependent on the content encoded in the stream. The stream is a main stream, and wherein tuning into the main stream is effected via a secondary stream comprising at least a subset of the data blocks of the main stream encoded at a quality different from a quality of the data blocks of the main stream. The self-contained blocks are inserted at positions in the main stream where differences in the quality of the data encoded in the main stream and in the secondary stream are less detectable.05-13-2010
20100086031VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels, for example, 64×64 pixels. In one example, an apparatus includes a video encoder configured to receive a video coding unit, determine a first rate-distortion metric for encoding the video coding unit using first video blocks with sizes of 16×16 pixels, determine a second rate-distortion metric for encoding the video coding unit using second video blocks with sizes of more than 16×16 pixels, encode the video coding unit using the first video blocks when the first rate-distortion metric is less than second rate-distortion metric, and encode the video coding unit using the second video blocks when the second rate-distortion metric is less than the first rate-distortion metric.04-08-2010
20100086027EFFICIENT PREDICTION MODE SELECTION - In generally, techniques are described for efficiently selecting a prediction mode by which to predict predictive video data from reference video data. In particular, an apparatus may include a memory that stores at least a first and second reference coded unit that each includes a first and second reference video data unit, respectively. The apparatus may further comprise a motion compensation unit that performs default weighted prediction to predict a first version of a predictive video data unit from the first and second reference video data units and calculates an offset value for the first version of the predictive video data unit. The motion compensation unit may then perform, based on the calculated offset value, either implicit weighted prediction or explicit weighted prediction to predict a second version of the predictive video data unit and encode the predictive video data unit as either the first or second version.04-08-2010
20090207912Reducing key picture popping effects in video - Techniques and tools are described for reducing key picture popping effects. In some embodiments, an encoding system filters a video picture that is to be encoded as a key picture using intra-picture compression. The filtering reduces detail in the picture relative to other video pictures that are to be encoded using inter-picture compression. In many cases, the filtering reduces key picture popping effects by selectively attenuating detail in the picture that is to be encoded as a key picture. The encoding tool can use a key picture filter strength parameter to control strength of the filtering. The tool encodes the filtered video picture using intra-picture compression and encodes the other video pictures using inter-picture compression.08-20-2009
20100086042VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20100086041VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20100086038VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20100086037VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20100086043VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20100086040VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20090086818FRAME BUFFER MEMORY OPERATING METHOD USED TO DECOMPRESS COMPRESSED MOVING PICTURES, AND DECODING APPARATUS ADAPTED TO FRAME BUFFER MEMORY OPERATING METHOD - Provided are a buffer memory operating method used to decompress compressed moving pictures, in which a buffer memory used during decompression of compressed moving picture is efficiently operated to efficiently reduce the capacity of an actually used buffer memory, and a decoding apparatus adapted to the buffer memory operating method. The frame buffer memory operating method includes the operations of decoding a current input I frame and storing the decoded current I frame in a standby buffer and converting the standby buffer having the decoded current I frame into a storage buffer and simultaneously converting a storage buffer having a previous I frame into another standby buffer; and decoding a current input P frame with reference to the decoded current I frame stored in the storage buffer, storing the decoded current P frame in one of the standby buffers, and converting the standby buffer having the current P frame to the other standby buffer.04-02-2009
20090285285INFORMATION PROCESSING APPARATUS AND INTER-PREDICTION MODE DETERMINATION METHOD - According to one embodiment, an information processing apparatus which encodes a moving image signal, includes an inter-prediction mode determination unit which determines a combination of an inter-prediction mode used by an inter-prediction unit and a DCT used by a transformation unit among from an inter-prediction modes and a DCTs, for each of macroblocks. The inter-prediction mode determination unit includes a first selection unit which selects DCTs of a predetermined number from the DCTs, for at least one specific inter-prediction mode among the inter-prediction modes, and a second selection unit which selects a combination of one inter-prediction mode and one DCT from the inter-prediction modes and the DCTs of the predetermined number selected by the first selection unit.11-19-2009
20100080293Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining identification information representing the multi-view video data stream including initialization information of a reference picture list for the random access slice, obtaining initialization information of a reference picture list for the random access slice based on the identification information, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list using the view number information and the view identification information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header.04-01-2010
20090080521VIDEO FRAME ENCODING AND DECODING - A video frame arithmetical context adaptive encoding and decoding scheme is presented which is based on the finding, that, for sake of a better definition of neighborhood between blocks of picture samples, i.e. the neighboring block which the syntax element to be coded or decoded relates to and the current block based on the attribute of which the assignment of a context model is conducted, and when the neighboring block lies beyond the borders or circumference of the current macroblock containing the current block, it is important to make the determination of the macroblock containing the neighboring block dependent upon as to whether the current macroblock pair region containing the current block is of a first or a second distribution type, i.e., frame or field coded.03-26-2009
20090190659VIDEO ENCODING METHOD AND APPARATUS, AND VIDEO DECODING METHOD AND APPARATUS - A video encoding method and apparatus, and a video decoding method and apparatus, which are capable of improving efficiency of encoding a luminance component video signal by predicting information on various encoding modes of the luminance component video signal by using a result obtained by encoding a chrominance component video signal, are provided. Accordingly, a block mode and an intra-prediction mode of the luminance component video signal are predicted from a previously encoded and recovered chrominance component video signal, and the predicted block mode and the predicted intra-prediction mode are used to encode the luminance component video signal.07-30-2009
20100091847VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100086034 METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - The present invention relates to a video signal decoding method for adding an intra prediction mode as a sub-macroblock type to prediction of a macroblock in coding a video signal. The present invention includes obtaining a macroblock type, obtaining a sub-macroblock type when a macroblock includes a plurality of coded sub-macroblocks according the macroblock type, obtaining flag information indicating a DC (discrete cosine) transform size, determining the DC transform size of the coded sub-macroblock based on the flag information, when the sub-macroblock is intra prediction coded based on the sub-macroblock type, determining a prediction size of the intra prediction coded sub-macroblock based on the determined DC transform size, obtaining prediction direction information from a block adjacent to the sub-macroblock based on the prediction size of the sub-macroblock, and obtaining a prediction value of the sub-macroblock based on the prediction direction information. Accordingly, the present invention is able to raise coding efficiency of video signal by adding an intra prediction mode as a sub-macroblock type in predicting a macroblock.04-08-2010
20090168872Method and Apparatus for Encoding/Decoding Video Signal Using Block Prediction Information - This invention relates to a method and apparatus for encoding video signals based on prediction information of an intra mode block of a sub-layer and decoding the encoded video data accordingly. The method encodes a video signal in a scalable MCTF scheme to output a bit stream of an enhanced layer, and simultaneously encodes the video signal using a pre-determined method to output a bit stream of a base layer. When the video signal is encoded in the MCTF scheme, an image block included in an arbitrary frame of the video signal is coded to be an error value using the uncoded value of pixels adjacent to the image block, on the basis of prediction information of the corresponding block coded as an intra mode, the corresponding block being included in a bit stream of the base layer and corresponding to the image block, and a bit stream including the coded image block is transmitted while constraint information being released.07-02-2009
20090097556Encoding Apparatus, Encoding Method, Program for Encoding Method, and Recording Medium Having Program for Encoding Method Recorded Thereon - An encoding apparatus for generating, in an intra prediction mode, difference data by subtracting prediction values from input image data, and performing encoding processing on the input image data by processing the difference data. The apparatus includes a first prediction mode detecting section for detecting a first best prediction mode, a second prediction mode detecting section for detecting a second best prediction mode, and a prediction value generating section for selecting a best prediction mode. The first prediction mode detecting section detects the first best prediction mode by utilizing processing in the second prediction mode detecting section.04-16-2009
20110200104PARALLEL ENTROPY CODING AND DECODING METHODS AND DEVICES - A method for entropy coding data using parallel entropy coders to encode an input sequence as a plurality of encoded subsequences, which are then combined to form an output bitstream. The input sequence is separated into subsequences on the basis of a context model. A method for entropy decoding a bitstream of encoded data by extracting a plurality of encoded subsequences from the bitstream and entropy decoding the encoded subsequences in parallel to generate a plurality of decoded subsequences, which are then interleaved based on a context model to produce a reconstructed sequence.08-18-2011
20120106636IMAGE ENCODING/DECODING METHOD AND APPARATUS - The present disclosure relates to a video encoding/decoding method and provides a video encoding apparatus including: an intra-prediction mode determiner for determining an intra prediction mode of current block entitled an encoder prediction mode by using candidate intra-predictable mode set including intra-prediction mode candidates being selected from a whole and predictable by video decoding apparatus; an encoder for encoding residual block from subtracting predicted block from predicting the current block by the encoder prediction mode from current block; a mode information generator for generating mode information depending on whether the video decoding apparatus can predict the encoder prediction mode; and an encoded data generator for generating encoded data including an encoded residual block and the mode information. The present disclosure selectively encodes mode information on the intra-prediction mode to reduce the bit rate of encoded data from encoding video and improve video compression efficiency and quality of compressed video.05-03-2012
20120106635ENCODER, ENCODING METHOD, AND PROGRAM - An encoder including a code amount prediction unit predicting the amount of code of data to be encoded, the code amount prediction unit including a conversion unit converting input syntax elements to symbol data, and a measurement unit measuring the predicted amount of code of the data to be encoded on the basis of the number of times of renormalization processing performed on each bit in an arithmetic encoding process applied to the symbol data.05-03-2012
20120106633APPARATUS AND METHOD FOR IMAGE ENCODING/DECODING CONSIDERING IMPULSE SIGNAL - An apparatus and method for video encoding/decoding considering impulse signal are disclosed. The method for video encoding includes generating a predicted block from predicting a current block and subtracting the predicted block from the current block to generate an M×N residual block, and encoding an A×B residual block containing residual signals of an impulsive component in the M×N residual block to generate a bitstream. The apparatus and the method of the present disclosure improve coding efficiency by efficiently encoding or decoding the residual signals of the impulse component in encoding or decoding videos.05-03-2012
20120106632METHOD AND APPARATUS FOR ERROR RESILIENT LONG TERM REFERENCING BLOCK REFRESH - A system and method for coding video data wherein a pixel block may be coded for refresh with reference to an LTR frame that was successfully transmitted, or has a high probability of having been successfully transmitted from the encoder to the decoder. Not all pixel blocks in the frame may be refreshed at the same rate. Pixel blocks containing edge details, containing a significant object, or containing foreground image data may be refreshed more often than pixel blocks containing smooth, background, or relatively less significant image data.05-03-2012
20090175334ADAPTIVE CODING OF VIDEO BLOCK HEADER INFORMATION - This disclosure describes techniques for adaptively coding video block header information based on previously encoded video blocks. A video encoder may adaptively select a coding table for use in encoding a syntax element of a current video block based on corresponding syntax elements of one or more previously encoded blocks. In one aspect, the video encoder may adaptively select the coding table for use in encoding a block type of the current block based on block types of one or more video blocks adjacent to the current video block, i.e., neighboring video blocks. The video encoder may also predict one or more other header syntax elements of the current block based on at least one of the previously encoded video blocks. If prediction is successful, the video encoder may encode a flag to indicate the success of prediction.07-09-2009
20090168874Methods and Apparatus for Multi-View Video Coding - There are provided methods and apparatus for multi-view video coding. A video encoder includes an encoder for encoding a block in a picture by choosing between temporal prediction and cross-view prediction to enable a prediction for the block. The picture is one of a set of pictures corresponding to multi-view video content and having different view points with respect to a same or similar scene. The picture represents one of the different view points. A high-level syntax is used to indicate the use of cross-view prediction for the block.07-02-2009
20090168877VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.07-02-2009
20090274211APPARATUS AND METHOD FOR HIGH QUALITY INTRA MODE PREDICTION IN A VIDEO CODER - A computer readable storage medium has executable instructions to select a plurality of blocks in a video sequence to be coded as intra-coded blocks. Aggregate intra prediction costs are computed for each intra-coded block relative to a corresponding previous intra-coded block. An intra prediction mode is selected for each intra-coded block based on the aggregate intra prediction costs.11-05-2009
20090274212Semiconductor Device Having Moving Image Transcoder and Transcoding Method Therefor - Embodiments include systems and methods for transcoding moving image data. Specifically, in one embodiment, moving image data encoded in a first format can be time divided into a plurality of segments and transmission segments formed from these segments. Each transmission segments can correspond to a particular segment of the moving image data and include the moving image data of that segment plus terminal end data from a preceding segment. One or more second terminals can receive these transmission segments from the first terminal and, working at least partially in parallel, generate second encoded portions from a transmission segment by decoding the moving image data in the first format from the transmission segment using the terminal end data included in the transmission segment and encoding the moving image data in the second format. Moving image data encoded in the second format may be generated by connecting these second encoded portions.11-05-2009
20090279606METHOD AND APPARATUS FOR ENCODING AND DECODING AN IMAGE BASED ON PLURALITY OF REFERENCE PICTURES - A method and apparatus for encoding and decoding an image using a plurality of reference pictures. In an exemplary embodiment, the method of encoding an image comprises: generating information about transforms between a first picture and a second picture; generating a reference picture by transforming the second picture based on the generated information about transforms; predicting a current block of a current picture based on at least one of the reference picture and the first picture; and encoding the current block based on the predicting. Therefore, prediction encoding based on more accurate prediction is possible, thereby increasing a compression ratio of image encoding.11-12-2009
20090262814VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262813VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262812VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262811VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262810VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262809VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262808VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262806VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262804Reference picture list management syntax for multiple view video coding - A picture reference list ordering process is defined for a multiview coder for coding moving pictures, where the picture list has the coding order of reference pictures used to code a picture specified in relationship to whether a picture to be coded is associated with a view. The ordering of the picture list will therefore change the coding order of the reference pictures in the picture reference list depending on the temporal relationships the reference pictures have with the picture to be coded and views associated with the reference picture.10-22-2009
20090262803Encoding Apparatus, Encoding Method, and Program of Same and Decoding Apparatus, Decoding Method, and Program of Same - An encoding apparatus for encoding progressive image data and interlace image data corresponding to this progressive image data, having a first encoding unit configured to encode picture data composing the interlace image data to generate first encoded data and decoding and recomposing the first encoded data to generate recomposed image data, an up sample processing unit configured to up sample the generated recomposed image data to generate image data having the same resolution as that of the progressive image data, and a second encoding unit configured to encode the picture data composing the progressive image data to generate second encoded data using the generated image data as predictive image data.10-22-2009
20090290638Simplified transmission method for a stream of signals between a transmitter and an electronic device - The present invention essentially relates to a transmission method, via a communications network using a packet data transmission protocol, of a stream of multimedia samples between a transmitter server and at least one decoder receiver intended to restore these data in real time, this stream of samples coding images of variable size, the stream of samples coding images (I, P, B) of variable size, characterized in that the method comprises notably different steps consisting in: 11-26-2009
20090296810VIDEO CODING APPARATUS AND METHOD FOR SUPPORTING ARBITRARY-SIZED REGIONS-OF-INTEREST - A computer readable storage medium has executable instructions to select a plurality of macroblocks in a video sequence to be coded as anchor macroblocks, the anchor macroblocks distributed across the video sequence and facilitating random access decoding of a portion of the video sequence. The video sequence is coded into a bit stream. Auxiliary information associated with the anchor macroblocks is generated. The auxiliary information associated with the anchor macroblocks is inserted in a supplementary section of the bit stream.12-03-2009
20090285290VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285298VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285297VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285296VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285288Video Encoding/Decoding Method and Apparatus - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285291VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285289VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285287VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285286VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-19-2009
20090285284PICTURE CODING APPARATUS AND PICTURE DECODING APPARATUS - The present invention provides a picture coding apparatus which can reduce a load in decoding. When a RAU to be coded is an open GOP type RAU, the present invention includes: a motion estimation unit, a motion compensation unit, and the like which codes a picture to be coded to generate a BI-picture; a BI information generation unit which generates a RAU map indicating whether or not the BI-picture is positioned in a display order immediately before a starting I-picture in the RAU of the stream; and a variable length coding unit which writes the RAU map into the RAU of the stream.11-19-2009
20110170593METHOD AND APPARATUS FOR ENCODING VIDEO AND METHOD AND APPARATUS FOR DECODING VIDEO BY CONSIDERING SKIP AND SPLIT ORDER - A method of encoding a video includes: splitting a picture into a maximum coding unit; for the maximum coding unit, determining coding units having a tree structure including coding units of coded depths and determining encoding modes for the coding units of the coded depths by performing encoding based on coding units according to depths, the coding units according to depths obtained by hierarchically splitting the maximum coding unit as a depth deepens; and outputting information about a maximum coding unit size and, for the maximum coding unit, information indicating an order of split information and skip mode information which is selectively determined for the coding units according to depths, information about the encoding modes for the coding units of the coded depths including the split information and the skip mode information which are arranged according to the order, and encoded video data.07-14-2011
20090290640VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-26-2009
20090290639VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.11-26-2009
20090296812FAST ENCODING METHOD AND SYSTEM USING ADAPTIVE INTRA PREDICTION - Fast encoding method and system are provided which can transmit video data in real time using adaptive intra prediction in accordance with the H.264/AVC (Advanced Video Codec) standard so as to efficiently provide security-related images or multimedia images in various network environments with high quality. An intra prediction method of compressing and encoding an image includes the steps of: comparing an SAD value C calculated from macro block data of a present frame and a previous frame with a reference value K to determine a prediction method; and selectively performing on input macro block data a first method of determining a best mode and a block size by prediction in a plurality of prediction modes based on spatial directivity and generating prediction data and a second method of generating prediction data using the best mode and the block size used in the previous frame, depending on the determined prediction method.12-03-2009
20090296811Method and Apparatus for Decoding/Encoding a Video Signal - The present invention provides a method of decoding a video signal. The method includes the steps of obtaining view information of a picture from the video signal and generating information for reference picture management using the view information.12-03-2009
20100118942METHODS AND APPARATUS AT AN ENCODER AND DECODER FOR SUPPORTING SINGLE LOOP DECODING OF MULTI-VIEW CODED VIDEO - There are provided methods and apparatus at an encoder and decoder for supporting single loop decoding of multi-view coded video. An apparatus includes an encoder for encoding multi-view video content to enable single loop decoding of the multi-view video content when the multi-view video content is encoded using inter-view prediction. Similarly, a method is also described for encoding multi-view video content to support single loop decoding of the multi-view video content when the multi-view video content is encoded using inter-view prediction. Corresponding decoder apparatus and method are also described.05-13-2010
20100111177VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-06-2010
20100111176VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-06-2010
20100111175REFERENCE DATA BUFFER FOR INTRA-PREDICTION OF DIGITAL VIDEO - Encoding or decoding digital video frames in intra-prediction mode by selecting column reference data locations for blocks adjacent a current block from a column reference data buffer storing column reference data samples for no more than two macro blocks of the frame. In some cases, the column reference data buffer may include a storage size for samples of a first column of data of blocks of one macro block of luminance samples. Encoding and decoding may also include selecting row reference data locations for blocks adjacent a current block from a row reference data buffer storing row reference data samples for at least one row of macro blocks of the frame. In some cases, the row reference data buffer may include storage for samples of a first row of data of fourteen successive blocks spanning two rows. The concept can be applied to various video processing components and standards.05-06-2010
20100111169Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation for a single direction or a bi-direction between a plurality of views with view number information and view identification information, obtaining type information indicating whether the random access slice is predicted for a single direction or a bi-direction, initializing the reference picture list using the view number information and the view identification information according to the type information, obtaining modification information for the initialized reference picture list from a multi-view video data stream, the modification information representing how to assign an inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the modification information, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained from an extension area of a sequence header.05-06-2010
20100111174Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.05-06-2010
20100111173Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.05-06-2010
20100111172Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.05-06-2010
20100111171Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.05-06-2010
20100111170Method and apparatus for decoding/encoding a video siganl - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.05-06-2010
20100111168DATA COMMUNICATION UNIT, DATA COMMUNICATION NETWORK AND METHOD OF DECODING - A wireless communication unit comprises a receiver for receiving information from a remote transmitter unit. The receiver comprises a demodulator for demodulating received data packets operably coupled to a decoder arranged to perform a cyclic redundancy check (CRC) on the demodulated received data packets and perform multi-protocol encapsulated (MPE) decoding thereon. The demodulator forwards both valid CRC corrected data packets and non-corrected CRC data packets to the decoder and the decoder is configured to place the MPE non-corrected CRC data packets into Reed Solomon (RS) code words.05-06-2010
20100111166DEVICE FOR DECODING A VIDEO STREAM AND METHOD THEREOF - A device is disclosed having a motion vector processing module to determine a first set of motion vectors associated with a macroblock of a video picture. A motion vector reduction module determines a second set of motion vectors, based on the first set of motion vectors, associated the macroblock, the second set having fewer motion vectors than the first set. A decode module comprising an input completes decoding of the macroblock based upon the second set of motion vectors05-06-2010
20080212674METHOD AND APPARATUS FOR VIDEO DECODING AND DE-INTERLACING - A method for video decoding in a video decoding/de-interlacing display apparatus that utilizes a storage device having four frame buffers is provided. The method includes following steps: (a) decoding video data of a next picture; (b) if the next picture is a B picture, buffering the decoded video data of the next picture into a frame buffer of the storage device not stored with a reference picture nor a present display picture nor a previous display picture; and (c) if step (b) is not applicable, buffering the decoded video data of the next picture into a frame buffer of the storage device stored with the previous display picture.09-04-2008
20110206120SYSTEM AND METHOD FOR ENCODING AND DECODING USING TEXTURE REPLACEMENT - The invention provides devices and methods that process images. The invention processes a received signal representing information of texture and information of an image, which has the texture removed from at least one region. The image information is encoded to obtain encoded information of the image. An output signal is generated representing the texture information and the encoded image information. In another embodiment, the invention synthesizes texture based on the received texture information, decodes received image information, which is encoded, to obtain a decoded image, and then maps the synthesized texture onto the decoded image.08-25-2011
20100061454METHOD OF PROCESSING A VIDEO SIGNAL - A method of processing a video signal is disclosed. The present invention includes obtaining a DC (discrete cosine) transform coefficient for a current macroblock and partition information of a DC (direct current) component block from a bitstream, obtaining transform size information of each partition of the DC component block based on the partition information of the DC component block, performing an inverse DC transform or a Hadamard transform based on the transform size information of the partition of the DC component block, performing inverse quantization on a result value from the transform and an AC (alternating current) component, and reconstructing a residual block by performing an inverse DC transform on a result value from the inverse quantization, wherein the residual block includes a block indicating a pixel value difference between an original picture and a predicted picture.03-11-2010
20100128780METHOD AND SYSTEM FOR SECURELY TRANSMITTING AND RECEIVING MULTIMEDIA CONTENT - A method and a system for transmitting and receiving multimedia content includes identifying the Intra coded frames (I-frames) from a combination of the I-frames, predicted frames (P-frames), and bi-directional predicted frames (B-frames). The method comprises scrambling Intra coded frames selectively, generating multimedia content comprising scrambled information of the I-frames, and transmitting the multimedia content. The method further comprises receiving the multimedia content and &scrambling the I-frames selectively. The system comprises transmitting unit including a selective scrambler, and a processor including an encoding unit and a decoding unit. The system further comprises a receiving unit including selective a descrambler.05-27-2010
20090168873Method for Modeling Coding Information of a Video Signal for Compressing/Decompressing Coding Information - A method for context-modeling coding information of a video signal for compressing or decompressing the coding information is provided. An initial value of a function for probability coding of coding information of a video signal of an enhanced layer is determined based on coding information of a video signal of a base layer.07-02-2009
20110206118Data Compression for Video - The present invention provides an encoded bitstream and corresponding decoder. An encoded bit stream of compressed video data represents a plurality of successive video frames with each frame being divided into a plurality of portions and each portion corresponding to a plurality of pixels. The encoded bit stream comprises: a set of quantized transform domain coefficients representing a first one of said portions; difference data for a second one of said portions, wherein the difference data defines a difference between transform domain coefficients of the first portion and the predicted second portion, such that the second portion can be predicted from the first portion; and an address specifying the location of the first portion in terms of a whole number of said portions instead of a pixel offset.08-25-2011
20100135389METHOD AND APPARATUS FOR IMAGE ENCODING AND IMAGE DECODING - An image encoding apparatus includes a transform/quantization unit configured to perform transform and quantization with respect to a prediction error signal indicative of a difference value between a predicted image signal and an input image signal in order to generate a quantized transform coefficient, a encoding unit configured to perform entropy encoding with respect to the quantized transform coefficient in order to generate encoded data, a derivation unit configured to derive prediction complexity indicative of a degree of complication of the prediction processing, a determination unit configured to determine filtering strength for a locally decoded image signal to become low as the prediction complexity increases, a filter unit configured to perform deblocking filter processing with respect to the locally decoded image signal in accordance with the filtering strength, and a storage unit configured to store the locally decoded image signal after the deblocking filter processing.06-03-2010
20100215102VIDEO ENCODING METHOD AND DECODING METHOD, APPARATUSES THEREFOR, PROGRAMS THEREFOR, AND STORAGE MEDIA WHICH STORE THE PROGRAMS - An image encoding method for encoding a pixel value of an encoding target by using a predicted value generated by means of spatial or temporal prediction using a previously-decoded image. The method performs prediction of the pixel value of the encoding target and obtains the predicted value; computes data of a probability distribution which indicates what value an original pixel value has for the obtained predicted value, by shifting, in accordance with the predicted value, difference distribution data of a difference between the original pixel value and the predicted value in predictive encoding, where the difference distribution data is stored in advance; clips the obtained data of the probability distribution so as to contain the data in a range from a lower limit to an upper limit for possible values of the original pixel value; and encodes the pixel value of the encoding target by using the clipped data of the probability distribution of the original pixel value from the lower limit to the upper limit.08-26-2010
20100086033IMAGE PREDICTION APPARATUS AND METHOD, IMAGE ENCODING APPARATUS, AND IMAGE DECODING APPARATUS - An image predicting apparatus used in an image encoding apparatus or decoding apparatus and performing encoding or decoding of an image while performing image prediction processing for each macroblock, the image predicting apparatus comprises: a characteristic amount image extracting unit extracting characteristic amount image data from predicted image data obtained as a result of the image prediction processing; a characteristic amount image adjusting unit adjusting the characteristic amount image data according to the predicted image data; and a predicted image combining unit combining the adjusted characteristic amount image data obtained from the characteristic amount image adjusting unit and the predicted image data and outputting the composite predicted image.04-08-2010
20100135390VIDEO CODING - Improved video coding is described to encode video data within a sequence of video frames. To this end, at least a portion of a reference frame is encoded to include motion information associated with the portion of the reference frame. At least a portion of a predictable frame that includes video data predictively correlated to said portion of said reference frame is defined based on the motion information. At least said portion of the predictable frame is encoded without including corresponding motion information and including mode identifying data. The mode identifying data indicate that the encoded portion of the predictable frame can be directly derived using at least the motion information associated with the portion of the reference frame.06-03-2010
20110206121IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD, AND IMAGE ENCODING PROGRAM - It is an object of the present invention to provide an image encoding apparatus, an image encoding method, and an image encoding program, which can homogenize image quality of an image as a whole without lowering encoding efficiency, being operable at high speed, and reduce the size of circuit scale by performing macroblock shuffling without changing slice structure. Provided is an image encoding apparatus, including: a shuffling portion which collects and shuffles a plurality of macroblocks constituting image data from respective positions within an image; an encoding portion which performs space-frequency transform and entropy encoding on the plurality of macroblocks collected and shuffled by the shuffling portion, as a base unit; and a rate control portion which controls the encoding portion to adjust the rate of the plurality of macroblocks after the encoding.08-25-2011
20100135391METHODS AND APPARATUS FOR MOTION SKIP MOVE WITH MULTIPLE INTER-VIEW REFERENCE PICTURES - There are provided methods and apparatus for motion skip mode with multiple inter-view reference pictures. An apparatus includes an encoder for encoding an image block relating to multi-view video content by performing a selection, for the image block, of at least one of an inter-view reference picture list from a set of inter-view reference picture lists, an inter-view reference picture from among a set of inter-view reference pictures, and a disparity vector from among a set of disparity vectors corresponding to the inter-view reference picture. The encoder extracts motion information for the image block based on at least one of the inter-view reference picture list, the inter-view reference picture, and disparity vector.06-03-2010
20090168875Inter-Layer Prediction Method for Video Signal - The present invention relates to a method for using interlaced video signal of a base layer in interlayer texture prediction. The present method constructs a pair of frame macro blocks from vertically-adjacent two field macro blocks pertaining to interlaced video signal of a base layer, separates video signal containing the pair of frame macro blocks into even-field and odd-field components, interpolates the even- field and the odd- field components respectively in vertical and/or horizontal direction, and constructs a combined video data by interleaving the interpolated even-field and odd-field components.07-02-2009
20090034615DECODING DEVICE AND DECODING METHOD - According to one embodiment, a decoding device, includes an input unit configured to input a moving image stream wherein each image is encoded in macro-blocks of n×n pixels to be generated by being divided in a matrix shape, a detection unit configured to analyze information of a slice composed of more than one macro-block included in the moving image stream input from the input unit and detects inter-macro-blocks in the slice, two or more decoding units configured to decode the moving image stream in macro-blocks, and a control unit configured to make the decoding unit decode intra-macro-blocks in the slice after making the two or more decoding units decode in parallel the inter-macro-blocks in the slice detected by the detection unit.02-05-2009
20100128784VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-27-2010
20100128782VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-27-2010
20100128779METHOD AND APPARATUS FOR SPLICING IN A COMPRESSED VIDEO BITSTREAM - Methods and apparatus for splicing multiple video streams together. In one embodiment, two compressed video bit streams having one or more disparate qualities, such as bit rate, format, field parity, etc., are spliced together to form a single video bit stream that is free from any significant artifact. In one variant, a splicing boundary is located (e.g., at an I-frame or P-frame of a first stream), and the second stream spliced in at that point. A correction (e.g., addition or deletion of a frame) is then applied. In one implementation, the process maintains compliance with H.264 requirements.05-27-2010
20090168876VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.07-02-2009
20080291997Method of Encoding and Decoding Video Signals - Disclosed herein is a method of encoding video signals. The method includes creating a bit stream of a first layer by encoding the video signals, and creating a bit stream of a second layer by encoding the video signals based on the first layer. When residual data, corresponding to an image difference, within the first layer, is up-sampled and used for the encoding of the second layer, the residual data is up-sampled for each block that is predicted based on motion compensation.11-27-2008
20080291998VIDEO CODING APPARATUS, VIDEO CODING METHOD, AND VIDEO DECODING APPARATUS - The video coding apparatus of the present invention for reducing pulsing artifacts includes: a correlation calculation unit which calculates a correlation value indicating a correlation degree of correlation between: a first block; and a second block or a third block. The first block including pixels included in a first original picture in an original picture sequence of original pictures, the second block including pixels included in a second original picture which precedes the first original picture, and the third block being obtained by coding and reconstructing the second block. The video coding apparatus includes a correlation judgment unit which judges whether the correlation value exceeds a first threshold, and judge that the correlation is high when the correlation value exceeds the first threshold; and a blending unit which blends the first block and the third block when the correlation judgment unit judges that the correlation is high.11-27-2008
20090028240Encoder, Decoder, Method for Encoding/Decoding, Computer Readable Media and Computer Program Elements - An encoder for encoding a first digital signal representative for a first channel and a second digital signal representative for a second channel is described. The encoder comprises cascaded intra-channel prediction elements for compressing the first digital signal and the second digital signal based on intra-channel correlation and an inter-channel prediction element for compressing the first digital signal and the second digital signal based on inter-channel correlation.01-29-2009
20080304566Method for Decoding Video Signal Encoded Through Inter-Layer Prediction - A method for decoding a video signal encoded through inter-layer prediction is provided. When encoded bitstreams of first and second layers are received and decoded into a video signal, pictures of the first layer are predicted from pictures of the second layer. It is determined whether or not inter-layer prediction is constrained under the condition that a target block in the first layer has been coded in an intra mode through prediction from a picture of the second layer. An operation for checking a flag “intra_base_flag” indicating whether or not image data of the target block has been coded into difference data with reference to residual data, coded in an intra mode, of a corresponding block of a different layer is skipped if it is determined that inter-layer prediction is constrained. This eliminates the need for an encoder to transmit the flag under the same condition.12-11-2008
20080304565REDUCING THE NETWORK LOAD OF EVENT-TRIGGERED VIDEO - In one embodiment, a method for reducing the network load of an event-triggered video system comprising transmitting a first ‘play’ indication by a controlling process over a data network, to an appropriately configured video encoding process, transmitting first video data by the encoding process in response to receiving the first ‘play’ indication, the first video data being transmitted over the data network through a communication channel established over the data network between the encoding process and a recording process and receiving the first video data by the recording process.12-11-2008
20080310506Joint Spatio-Temporal Prediction for Video Coding - Systems and methods are described for joint spatio-temporal prediction (JSTP) during video coding. A given block of pixels is simultaneously predicted via inter frame prediction and intra frame prediction. The joint spatio-temporal prediction provides a new JSTP coding mode besides inter and intra modes in coding schemata such as the H.264/AVC video coding standard. In one implementation, subband decomposition obtains a high-pass component of inter frame prediction of a block and a low-pass component of intra frame prediction of the same block. The high-pass component of the inter prediction and the low-pass component of the intra prediction are combined to produce the joint spatio-temporal prediction. In one implementation, a difference between the original block and the JSTP prediction is coded in a bitstream to represent the block.12-18-2008
20120294359REGION-BASED PROCESSING OF PREDICTED PIXELS - A method for decoding a compressed video data sequence containing one or more coded pixel blocks. The compressed video sequence is buffered. Prediction information for each of the coded pixel blocks is reviewed. One or more groups of coded pixel blocks are formed based on the reviewed prediction information such that the coded pixel blocks within a given group have similar prediction dependencies and/or at least do not depend on a reconstructed pixel within a group of received pixel blocks to enable parallel decoding. The formed groups are scheduled for processing and subsequently decoded to produce a decoded video data sequence.11-22-2012
20120294358IMAGE PROCESSING DEVICE AND METHOD - An image processing device and method, enabling improvement in encoding efficiency. A plane approximation unit uses each of pixels values themselves of a block to be processed to obtain each of the parameters of a function representing a plane approximating the pixel values. A plane generating unit obtains pixel values on a plane represented by the supplied plane parameters. A prediction encoding unit predicts the values of the plane parameters, and obtains the difference between the prediction values and the actual plane parameter values, thereby reducing the data amount thereof. The entropy encoding unit further performs entropy encoding of the encoded plane parameters. The encoded plane parameters are supplied to the decoding side.11-22-2012
20110206119Data Compression for Video - A method of compressing a video signal. The method comprises: for each of a plurality of image portions, transforming from a spatial domain representation into a transform domain representation; and for each of a plurality of target image portions to be encoded, determining a respective reference portion, determining a prediction of the target image portion based on the reference portion, and encoding the target image portion based on the prediction. The prediction comprises predicting a non-lateral motion of the target image portion relative to the reference portion based on processing of their transform domain coefficients. The encoding comprises generating an encoded bitstream comprising information about the non-lateral motion for use by a decoder.08-25-2011
20080205520Method of coding a video signal - The invention relates to methods and apparatuses for encoding and decoding of a video sequence. In connection with encoding/decoding a video sequence it is desirable to increase the video quality without having to increase the bit-rate for the encoded video too much, thereby still providing a bit-efficient representation of the video. If multiple descriptions of the video sequence is used the invention improves the video quality without any increase of the bit-rate. According to the invention, this is achieved by using two or more coding units for encoding the same video sequence, wherein the encoding units perform their encoding operations displaced in time in relation to each other. Correspondingly, two or more decoding units are used for decoding the same video sequence, wherein the decoding units perform their decoding operations displaced in time in relation to each other.08-28-2008
20080285648Efficient Video Decoding Accelerator - The present invention relates to a decoding apparatus and method for decoding compressed video data having a plurality of video frames with a plurality of blocks, wherein the video frames are split in a first predetermined direction into at least two stripes whose width does not exceed a hardware prediction line size. Then, coefficient prediction is performed on one of the at least two stripes to provide a predictor in a second predetermined direction for at least one other of the at least two stripes, the second predetermined direction being perpendicular to the first predetermined direction. Additionally, fake blocks are generated to be inserted into the at least one other of said at least two stripes in order to initialize prediction in the second predetermined direction. Thereby, hardware accelerators with fixed processing width can be used in a more flexible manner.11-20-2008
20120294357Methods, Apparatuses and Computer Programs for Video Coding - There is disclosed apparatuses, methods and computer programs for video coding. The filtering process to be applied to intra predicted sample values is selected and adapted based on the characteristics of the sample prediction process. According to some embodiments an angularity information and pixel values for filtering by a filter are received. The angularity information is used to adapt the filter. The adapting may comprise selecting a filter algorithm and/or filter coefficients. The selected pixels are then filtered by the adapted filter.11-22-2012
20080198927Weighted prediction video encoding - A method of encoding a source picture using at least two reference pictures by dividing the source picture into regions based on a predetermined criterion and dividing the reference pictures into corresponding regions using the predetermined criterion. At least luminance values for the source picture are obtained by weighting and offsetting luminance values of at least one of the regions of at least one of the reference pictures by an average luminance difference between the region of the reference picture and the corresponding region of the source picture. The weighted and offset luminance values from the at least two reference pictures are averaged or summed to predict luminance values of the source picture.08-21-2008
20080267287SYSTEM AND METHOD FOR IMPLEMENTING FAST TUNE-IN WITH INTRA-CODED REDUNDANT PICTURES - A system and method by which instantaneous decoding refresh (IDR)/intra pictures that enable one to tune in or randomly access a media stream are included within a “normal” bitstream as redundant coded pictures. In various embodiments, each intra picture for tune-in is provided as a redundant coded picture, in addition to the corresponding primary inter-coded picture.10-30-2008
20080240238INTRA PREDICTION SYSTEM OF VIDEO ENCODER AND VIDEO DECODER - There is provided an intra prediction system having high prediction performance and satisfactory encoding efficiency in a pattern image in which pixel value is periodically changed and a pattern image in which pixel value has a constant change tendency like gradation effect. A frequency component extraction unit allows a pixel value of an encoded MB to be made one-dimensional for one-dimensional orthogonal conversion. A frequency component-considering prediction value calculation unit receives, as inputs, a pixel value of an encoded adjacent MB and an alternating current frequency component output to create an orthogonal conversion coefficient. The orthogonal conversion coefficient then is subjected inverted orthogonal conversion (IDCT) to generate a prediction value p(i). A prediction direction determination unit selects and outputs a prediction value p′ (i) in a prediction direction having the highest encoding efficiency among a conventional prediction value calculation unit and a prediction value calculation unit according to the present invention.10-02-2008
20110206117Data Compression for Video - A method of selecting reference blocks for intra or inter prediction coding of a current block of a video signal. Each reference blocks is selected by: (i) determining a group of candidate blocks comprising at least some candidate blocks other than immediately adjacent spatial neighbours of the current block; and (ii) selecting one of the candidate blocks as the reference block based on a second metric, different from the first metric, the second metric relating to a number of bits that would be required in the encoded bitstream to encode both the residual block and the side information identifying the respective reference block.08-25-2011
20100142615METHOD AND APPARATUS FOR SCALABLE VIDEO ENCODING AND DECODING - Disclosed is a scalable video coding algorithm. A method for video coding includes temporally filtering frames in the same sequence to a decoding sequence thereof to remove temporal redundancy, obtaining and quantizing transformation coefficients from frames whose temporal redundancy is removed, and generating bitstreams. A video encoder comprises a temporal transformation unit, a spatial transformation unit, a quantization unit and a bitstream generation unit to perform the method. A method for video decoding is basically reverse in sequence to the video coding. A video decoder extracts information necessary for video decoding by interpreting the received bitstream and decoding it. Thus, video streams may be generated by allowing a decoder to decode the generated bitstreams, while maintaining the temporal scalability on an encoder-side.06-10-2010
20090161759METHOD AND APPARATUS FOR VIDEO CODING ON PIXEL-WISE PREDICTION - Provided is a video encoding and decoding method and apparatus using pixel-based prediction. A pixel-based video encoding apparatus includes a block prediction unit, a residual image generation unit, a pixel prediction unit, and an entropy-coding unit. The block prediction unit performs temporal or spatial prediction between a reference image and a current image in order to generate a prediction block corresponding to a current block to be encoded. The residual image generation unit generates a residual image block composed of a residual signal corresponding to a difference between pixels of the prediction block and pixels of the current block. The pixel prediction unit determines whether to apply differential pulse coded modulation (DPCM) to each of pixels of the residual image block based on a rate distortion optimization (RDO) value calculated for the case where DPCM is applied to each of the pixels of the residual image block and a RDO value calculated for the case where DPCM is not applied to each of the pixels of the residual image block. The entropy-coding unit performs entropy-coding on the residual image block.06-25-2009
20120069903REFERENCE PICTURE LIST CHANGING METHOD OF MULTI-VIEW VIDEO - Disclosed is a method of changing a reference picture list. The present invention includes parsing a profile identifier and a slice type from a multiview video bitstream, obtaining inter-view reference information based on the profile identifier, initializing a reference picture list using the inter-view reference information, and modifying the reference picture list in consideration of the slice type. Accordingly, the present invention defines profile information indicating a stereo video, thereby coding a multiview video signal more efficiently.03-22-2012
20120069902MOVING PICTURE DECODING DEVICE, MOVING PICTURE DECODING METHOD AND INTEGRATED CIRCUIT - An moving picture decoding device includes a receiver that receives data that has been coded according to multi-view coding of pictures that are included in a moving picture and provided for a plurality of views; a first decoder that decodes coded data that is included in the data coded according to the multi-view coding and provided for a first view; and a second decoder that decodes coded data that is included in the data coded according to the multi-view coding and provided for a second view A detector detects a region of the data that cannot be decoded and is among a plurality of regions to be decoded by the first decoder. A concealing unit conceals the predetermined region detected by the detector using decoded data.03-22-2012
20120069901VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND COMPUTER PROGRAM - It is a purpose of the present invention to provide a video encoding apparatus, a video decoding apparatus, a video encoding method, a video decoding method, and a computer program, which allow adaptive filter coefficients to be used with a reduced amount of coding. A video encoding apparatus AA selects a suitable coefficient from among multiple kinds of interpolation filter coefficients determined beforehand by means of a component external to the video encoding apparatus AA. Subsequently, the video encoding apparatus AA records identification information uniquely defined for the selected interpolation filter coefficient in control information for each slice. Furthermore, the video encoding apparatus AA uses the interpolation filter coefficient thus selected to generate encoded data c including the identification information uniquely defined for the interpolation filter coefficient thus selected.03-22-2012
20090268814VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-29-2009
20090268812VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-29-2009
20090268811Dynamic Image Reproducing Method And Device - A moving picture reproducing apparatus reproduces a moving picture file including different picture formats at a high speed. A parameter setting unit sets the number of frame α to be displayed per a unit time, a reproduction speed ratio β, a bit rate γ (α, β, and γ are real numbers). A seek distance setting unit sets a seek distance SD according to a value given by γ/α×β. An intra-frame encoded picture searching unit starts a search for a next intra-frame encoded picture at a search start position. A decoder decodes an intra-frame encoded picture found as a result of the search by the intra-frame encoded picture searching unit. The intra-frame encoded picture searching unit sets a data position ahead of a data position of the intra-frame encoded picture found by the seek distance, as a search start position to start searching for a next intra-frame encoded picture.10-29-2009
20080317125Bit Stream Recording Medium, Video Encoder, and Video Decoder - A conventional coding method has a problem that for frame-by-frame reverse playback, data must be once decoded in a forward direction and thus a larger volume of data must be processed and a larger volume of memory is required.12-25-2008
20080317126Methods and Apparatus For Parallel Implementations of 4:4:4 Coding - There are provided methods and apparatus for parallel implementations of 4:4:4 coding. A video encoder for encoding video signal data for an image block includes an encoder (12-25-2008
20090052529Method and Apparatus for Providing Reduced Resolution Update Mode for Multi-View Video Coding - There are provided a method and apparatus for illumination and color compensation for multi-view video coding. A video encoder includes an encoder (02-26-2009
20090052528Method and Apparatus for Encoding/Decoding Video Signal Using Block Prediction Information - This invention relates to a method and apparatus for encoding video signals using prediction information of an intra mode block of a sub-layer and decoding the encoded video data accordingly. The method encodes a video signal in a scalable MCTF scheme to output a bit stream of an enhanced layer, and simultaneously encodes the video signal using a pre-determined method to output a bit stream of a base layer. When the video signal is encoded in the MCTF schemes, an image block included in an arbitrary frame of the video signal is coded as an intra mode using pixels adjacent to the image block, in the basis of prediction information of the corresponding block coded as the intra mode, the corresponding block being included in a bit stream of the base layer and corresponding to the image block.02-26-2009
20090141801VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.06-04-2009
20090141800Transmitting Video Streams - Systems, methods, and devices for transmitting video streams are described herein. One method of transmitting video streams includes coordinating transmission of intra-frames in a first video stream with transmission of intra-frames in a second video stream. The method further includes transmitting I-frames in the first and second video streams such that the I-frames do not overlap in the first and second video streams.06-04-2009
20090141799Method of Processing a Signal and Apparatus for Processing a Signal - A method and apparatus for processing a signal compressed in accordance with a specific alternative coding scheme are disclosed. In detail, a coding method for signal compression and signal restoration using a specific alternative coding scheme, and an apparatus therefor are disclosed. Data coding and entropy coding according to the present invention are executed under the condition in which they have a co-relation with each other. The method for signal processing includes obtaining a pilot reference value corresponding to a plurality of data and a pilot difference value corresponding to the pilot reference value, and obtaining the data using the pilot reference value and the pilot difference value.06-04-2009
20090141798Image Decoding Apparatus and Image Decoding Method - An image decoding apparatus and an image decoding method capable of generating a decoded image even in the case where a pixel in a block is necessary as a reference pixel, the block where an intra prediction mode specified in a stream is unavailable according to a standard, due to a transmission error, a coding-method error, or the like. An image decoding apparatus (06-04-2009
20120287997MOVING PICTURE CODING METHOD, AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus for performing inter-picture predictive coding for pictures constituting a moving picture is provided with a coding unit for performing predictive error coding for image data; a decoding unit for performing predictive error decoding for an output from the coding unit; a reference picture memory for holding output data from the decoding unit; and a motion vector detection unit for detecting motion vectors on the basis of the decoded image data stored in the memory. When coding a B picture as a target picture, information indicating whether or not the target picture should be used as a reference picture when coding another picture is added as header information. Therefore, in a decoding apparatus for decoding a bit stream Bs outputted from the moving picture coding apparatus, management of a memory for holding the reference picture can be facilitated on the basis of the header information.11-15-2012
20120287993MANAGEMENT OF SLICES11-15-2012
20120287996MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - An image decoding method is provided for generating a predictive pixel value of a current picture to be decoded, and decoding the current picture using the predictive pixel value. The method includes a first parameter calculation step of calculating a first parameter corresponding to a distance between the current picture and a first reference picture; a second parameter calculation step of calculating a second parameter corresponding to a distance between the first reference picture and a second reference picture; a judgment step of judging whether or not a value of a third parameter calculated using a value obtained by dividing the first parameter by the second parameter is a value which is represented by a plurality of bits; a predictive pixel value generation step of generating a predictive pixel value of the current picture; and a decoding step of decoding the current picture using the predictive pixel value.11-15-2012
20120287995Luma-Based Chroma Intra-Prediction for Video Coding - A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes filtering reconstructed neighboring samples of a reconstructed down sampled luma block, computing parameters α and β of a linear model using the filtered, reconstructed neighboring samples of the reconstructed down sampled luma block and reconstructed neighboring samples of a corresponding chroma block, wherein the linear model is Pred11-15-2012
20120287994FILTERING BLOCKINESS ARTIFACTS FOR VIDEO CODING - In one example, an apparatus for coding video data includes a video coder configured to determine a first prediction mode for a first block of video data and a second prediction mode for a second block of video data, wherein the first block and the second block share a common edge, decode the first block using the first prediction mode and the second block using the second prediction mode, and determine whether to deblock the common edge between the first block and the second block based at least in part on whether at least one of the first prediction mode and the second prediction mode comprises short distance intra-prediction (SDIP).11-15-2012
20110222602METHOD AND DEVICE FOR PROCESSING A VIDEO SIGNAL USING INTER-VIEW PREDICTION - A method and apparatus for processing a video signal using inter-viewpoint prediction are disclosed. The video signal processing method includes acquiring a type of a current block, acquiring a depth inter-view prediction flag according to the current block type, acquiring color information of a reference block corresponding to the current block when the current block is encoded using depth inter-view prediction according to the depth inter-view prediction flag, and predicting color information of the current block using the color information of the reference block. The video signal processing method performs inter-viewpoint prediction using depth information, such that a motion vector of a macroblock can be induced from a decoder using such depth information. Therefore, a motion vector of the macroblock is not separately coded. In addition, the video signal processing method uses a flag that indicates whether to perform inter-viewpoint prediction using depth information.09-15-2011
20090052531VIDEO CODING - A video encoder using inter-frame differential coding has a store (02-26-2009
20090097557Image Encoding Apparatus, Image Encoding Method, Image Decoding Apparatus, and Image Decoding Method - The present invention provides an image encoding/decoding technique that is capable of achieving the higher compression efficiency. An image encoding method comprises: an intra prediction step which performs intra prediction on a block basis to generate a predicted image; a subtraction step which calculates the difference in prediction between the predicted image generated by the intra prediction step and an original image; a frequency conversion step which performs frequency conversion processing for the difference in prediction; a quantization step which subjects the output of the frequency conversion step to quantization processing; and a variable-length encoding step which subjects the output of the quantization step to variable-length encoding processing; wherein the intra prediction encoding step predicts a target pixel to be encoded by use of pixel values of two reference pixels between which the target pixel to be encoded is located.04-16-2009
20130215964Scanning Method and Device, and Reverse Scanning Method and Device - A scanning method and device, and a reverse scanning method and device in coding and decoding technologies are provided. The scanning method includes: receiving quantized transformed coefficients of a current block; obtaining a prediction direction of the current block; finding, according to the prediction direction, a scanning order corresponding to the prediction direction of the current block from a mapping relationship table of the prediction direction and the scanning order, wherein at least one scanning order in the mapping relationship table of the prediction direction and the scanning order corresponds to at least two prediction directions; and performing scanning processing on the coefficients by using the scanning order corresponding to the prediction direction of the current block. With the solutions of the present invention, the number of the scanning orders used in coding and decoding is decreased, and system complexity of a codec system is reduced.08-22-2013
20090052530IMAGE DATA COMPRESSION DEVICE, COMPRESSING METHOD, IMAGE DATA DECOMPRESSION DEVICE, DECOMPRESSING METHOD, AND RECORDING MEDIUM - A quantizer quantizes a “prediction error” as a difference value between a pixel X to be compressed and a prediction value X′. A variable-length encoder inputs a quantization number obtained from a quantization table of the quantizer, and outputs a variable-length code (compressed code). A prediction value candidate calculation module calculates candidates 1 through k for a prediction value on the basis of peripheral pixels A, C, and B, and transmits them to a multiplexer (MPX). A prediction value determination module determines a prediction value among the candidates 1 through k for a prediction value on the basis of an intermediate value correspondence table and an intermediate value—image format correspondence table depending on an image format, and transmits a control signal to the multiplexer (MPX). The multiplexer (MPX) outputs one of the candidates 1 through k for a prediction value as a prediction value X′.02-26-2009
20110142127Image Processing Device - Disclosed is an image processing technique which more suitably reduces flicker noise. An image display device is comprised of an input unit which inputs encoded image data containing images encoded by intraframe prediction and interframe prediction, an image decoder which decodes the encoded image data, a filter unit which filters the decoded images output from the image decoder, and a display unit which displays the image after filtering. The filter unit performs at least a process to correct the pixel values in a decoded image decoded by interframe prediction immediately preceding in time a decoded image decoded by intraframe prediction of the decoded images output from the image decoder.06-16-2011
20090201990METHOD AND DEVICE FOR REORDERING AND MULTIPLEXING MULTIMEDIA PACKETS FROM MULTIMEDIA STREAMS PERTAINING TO INTERRELATED SESSIONS - A method for reordering and multiplexing multimedia packets from multimedia data streams (S08-13-2009
20090097555Video encoding method and device - Successive images (F) of a video sequence are encoded in order in generate parameters which are included in an output flow (F) that is to be transmitted to a decoder. The encoding of certain images is effected in Inter mode relative to one or several previous images of the sequence. The output flow also includes long term marking commands for certain images and demarking commands for previously marked images. Each long-term marked image is kept in a memory by the decoder until a corresponding demarking command is received. Return information on the restoration of the images of the video sequence by the decoder is received by the encoder (1) and analyzed in order to identify an image that has been lost by the decoder. It is possible to encode a following image of the sequence in Inter mode in relation to a long-term marked image in response to identification of an image lost to the decoder.04-16-2009
20130121415METHODS AND APPARATUSES FOR ENCODING AND DECODING VIDEO USING INTER-COLOR-PLANE PREDICTION - Recent video coding schemes support inter-color-plane prediction to achieve higher coding efficiency and improved visual quality. Inter-color-plane prediction schemes in the prior art do not account for the variety of video content representations that are used in practice. The current invention provides methods and apparatuses for performing inter-color-plane prediction with adaptability to various existing video content representations. The benefit of the current invention is in the form of improved applicability and coding efficiency of inter-color-plane prediction techniques.05-16-2013
20110228849IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - An image processing apparatus includes a predictive picture generator configured to generate a predictive picture for an encoding target block based on pixel values of pixels included in already-encoded blocks around the encoding target block, a predictive error generator configured to generate predictive error based on a picture expressed by the encoding target block and a weighting unit configured to apply weights to pixel values by conducting a multiplication that multiplies by a constant greater than 1 the pixel values of pixels used to generate a predictive picture for another encoding target block, the pixels being pixels from among a plurality of pixels included in predictive error generated by the predictive error generator.09-22-2011
20110228850METHOD OF PROCESSING A VIDEO SEQUENCE AND ASSOCIATED DEVICE - The invention concerns a method of processing a video sequence and an associated device.09-22-2011
20110228848INTRA VIDEO IMAGE COMPRESSION AND DECOMPRESSION - A method for compressing an image having rows and columns, comprising providing an image, sub-sampling the image into a plurality of sub-image by selecting subsets of non-overlapping pixels in neighboring rows and columns in the image and encoding the sub-images in a video sequence.09-22-2011
20110228847Methods and Systems to Encode and Decode Sequences of Images - Methods and systems to compress and decompress sequences of images, such as video frames, including compression techniques to estimate pixel values, to determine differences between the estimated pixel values and actual pixel values, to arithmetically encode a corresponding sequence of difference values or symbols as a code value, and to output the code value and associated reference information in a data stream. Decompression techniques include techniques to read the code value and associated reference information from the data stream, to arithmetically decode the symbols from the code value, and to reconstruct the sequence of video frames from the decoded symbols and the associated reference information. Also disclosed are techniques to reduce or preclude overflow of registers or buffers used to hold code range values, and to order tables of code range values to improve efficiency of table look-up operations.09-22-2011
20100166068System and Method for Multi-Stream Video Compression Using Multiple Encoding Formats - A computer-implemented system and method are described for performing video compression. For example, a method according to one embodiment comprises: encoding a plurality of video frames or portions thereof according to a first encoding format, the first encoding format being optimized for transmission to a client device over a current communication channel; transmitting the plurality of encoded video frames or portions to the client device over the communication channel; concurrently encoding the first plurality of video frames according to a second encoding format, the second encoding format having a relatively higher-quality compressed video and/or a lower compression ratio than the first encoding format; storing the first plurality of video frames encoded in the second encoding format on a storage device; and making the first plurality of video frames encoded in the second encoding format available to the client device and other client devices for playback of the video stream.07-01-2010
20090207913METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - Provided are methods and apparatuses for encoding an image and methods and apparatuses for decoding an image. The methods and apparatuses generate a compensated prediction block by compensating a prediction block of a current block by using a predetermined compensation value and encode a residual value that is a difference between the compensated prediction block and an input current block.08-20-2009
20090219996VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-03-2009
20090219995VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-03-2009
20090129467Method for Encoding at Least One Digital Picture, Encoder, Computer Program Product - A method for encoding at least one digital picture is described, wherein a first representation of the picture is generated, a second representation of the picture is generated and a third representation of the picture is generated from the first representation of the picture and the second representation of the picture by predicting the coding information of the picture elements of the picture using the first representation of the picture and the second representation of the picture.05-21-2009
20090219999VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-03-2009
20090219998VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-03-2009
20090219997VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.09-03-2009
20090257494SYMMETRY FOR INTEROPLATION FILTERING OF SUB-PIXEL POSITIONS IN VIDEO CODING - This disclosure describes filtering techniques applied by an encoder and a decoder during the prediction stage of a video encoding and/or decoding process. The filtering techniques may enhance the accuracy of predictive data used during fractional interpolation, and may improve predictive data of integer blocks of pixels. There are several aspects to this disclosure, including a useful twelve-pixel filter support that may be used for interpolation, techniques that use coefficient symmetry and pixel symmetry to reduce the amount of data needed to be sent between an encoder and a decoder to configure the filter support for interpolation, and techniques for filtering data at integer pixel locations in a manner that is similar to sub-pixel interpolation. Other aspects of this disclosure concern techniques for encoding information in the bitstream to convey the type of filter used, and possibly the filter coefficients used. Predictive coding of filter coefficients is also described.10-15-2009
20090245369VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245370VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245364VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245368VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245367VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245365VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245361VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245363VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245362VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245360VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245358VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245357VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245356VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245355VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245354VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20090245352VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-01-2009
20100266011MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - A moving picture prediction method for enabling a calculation amount and a storage capacity to be reduced in a prediction about a moving picture by scaling processing is provided. A method for predicting the value P of Time T from the value P10-21-2010
20080260027MODE UNIFORMITY SIGNALING FOR INTRA-CODING - Techniques for efficiently signaling one or more prediction modes for blocks in a macroblock. A mode uniformity indicator is provided for each macroblock to indicate whether all blocks in the macroblock are to be predicted using the same prediction mode. In an embodiment, an encoder signals a mode uniformity indicator and a prediction mode. In another embodiment, a decoder receives a mode uniformity indicator and a prediction mode, and predicts at least two blocks of the macroblock using the prediction mode if the mode uniformity indicator is true.10-23-2008
20090252225VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-08-2009
20090252224VIDEO ENCODING / DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-08-2009
20090252223VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-08-2009
20090252222VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-08-2009
20090252221METHOD AND AN APPARATUS FOR ENCODING OR DECODING A VIDEO SIGNAL - A method of processing a video signal is disclosed. The present invention includes receiving prediction information of a macroblock and filer information, predicting a current picture using the prediction information of the macroblock, and applying a filter using the predicted current picture and the filter information.10-08-2009
20090257495VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-15-2009
20120195380METHOD AND APPARATUS FOR DECODING AND ENCODING VIDEO, AND METHOD AND APPARATUS FOR PREDICTING DIRECT CURRENT COEFFICIENT - Embodiments of the present invention provide a method and an apparatus for decoding and encoding a video, and a method and an apparatus for predicting a direct current coefficient. The video decoding method includes: receiving current frame image information sent by an encoding end, where the current frame image information includes prediction value information, and the prediction value information includes at least one intra-frame direct current DC prediction value; selecting a prediction value from the at least one intra-frame DC prediction value in the prediction value information as an intra-frame DC prediction value of the current image. Through the embodiments of the present invention, flexibility of encoding and decoding a video can be improved.08-02-2012
20120195379METHOD AND APPARATUS FOR ENCODING IMAGES, AND METHOD AND APPARATUS FOR DECODING ENCODED IMAGES - Methods and apparatuses for encoding and decoding an image are provided. The method of encoding an image includes: replacing a transformation coefficient having a low frequency component to be predicted from among transformation coefficients of a transformation block with a predetermined value; generating an incomplete residual block by inversely transforming the transformation block including the replaced transformation coefficient; and predicting the transformation coefficient having the low frequency component by using values of the incomplete residual block.08-02-2012
20090252226VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-08-2009
20100150233FAST MODE DECISION APPARATUS AND METHOD - A fast mode decision apparatus includes a data storage for storing therein data on a reference picture, a per-mode calculator for computing values on a macroblock to be encoded and a mode decision unit for determining an optimal encoding mode for the macroblock to be encoded based on the values computed by the per-mode calculator and data on the reference picture stored in the data storage. The apparatus further includes a mode deactivator for deactivating P8×8 mode I4×4 mode, wherein the mode decision unit selects, as the optimal encoding mode, one among modes other than the modes deactivated by the mode deactivator.06-17-2010
20100150232METHOD FOR CONCEALING A PACKET LOSS - A method of concealing a packet loss during video decoding is provided. An input stream having a plurality of network abstraction layer units NAL is received. A loss of a network abstraction layer unit in a group of pictures in the input stream is detected. A valid network abstraction layer unit order from the available network abstraction layer units is outputted. The network abstraction layer unit order is received by a video coding layer (VCL) and data is outputted.06-17-2010
20100150236Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.06-17-2010
20100150234Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.06-17-2010
20100150229Method of Encoding and Decoding Video Images With Spatial Scalability - The invention relates to a method of encoding and decoding video images with spatial scalability. The inventive method comprises the following steps consisting in: encoding (06-17-2010
20100158115METHOD AND APPARATUS FOR CODING AND DECODING USING BIT-PRECISION - Disclosed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding /decoding video data by use of the bit precision.06-24-2010
20100158114Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.06-24-2010
20100158113Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.06-24-2010
20120140824METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are a method and a apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels.06-07-2012
20120140823METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks.06-07-2012
20100189177VIDEO ENCODING METHOD AND DECODING METHOD, APPARATUSES THEREFOR, PROGRAMS THEREFOR, AND STORAGE MEDIA WHICH STORE THE PROGRAMS - A video encoding apparatus used in encoding of a multi-viewpoint image. The apparatus generates a synthetic image for a camera used for obtaining an encoding target image, by using an already-encoded reference camera image having a viewpoint different from the viewpoint of the camera used for obtaining the encoding target image, and disparity information between the reference camera image and the encoding target image, thereby encoding the encoding target image. A predicted image for a differential image between an input image of an encoding target area to be encoded and the synthetic image generated therefor is generated, and a predicted image for the encoding target area, which is represented by the sum of the predicted differential image and the synthetic image for the encoding target area, is generated. A prediction residual represented by a difference between the predicted image for the encoding target area and the encoding target image of the encoding target area is encoded.07-29-2010
20080232470Method of Scalable Video Coding and the Codec Using the Same - Since joint scalable video coding (JSVC) adopts a scheme in which numbers are assigned to all of the pictures according to the order in which the pictures are displayed, it is difficult to detect a drop (or loss) of a key picture and thus it is difficult to effectively take action against an error caused by the loss of the key picture. The present invention provides a coding method of detecting a loss of a key picture by numbering key pictures in JSVC in which predictive (P) pictures have a closed-loop structure and of effectively taking action against an error in the case of a loss of a key picture, and a codec using the coding method. The SVC method includes performing encoding while assigning a number to a key picture of an upper layer and performing decoding with respect to the number-encoded current key picture of the upper layer using data of a decoded image of a picture of a lower layer that is temporally matched with the current key picture of the upper layer when a loss of a key picture between the number-encoded current key picture of the upper layer and a previous key picture that is number-encoded prior to the current key picture is detected. Therefore, it is possible to effectively take action against to an error caused by a loss of a key picture by detecting the loss of a key picture during decoding by encoding using numbering of key pictures in JSVC in which closed-loop coding is performed by consecutively predicting key pictures. Moreover, it is possible to minimize degradation in image quality by concealing an error caused by an incorrect reference by using data of a decoded image of a corresponding picture of a lower base layer when a key picture of an upper layer is lost in an environment where transmission of the lower base layer is guaranteed with a video stream having a multi-layered structure.09-25-2008
20110103472METHODS, SYSTEMS AND DEVICES FOR COMPRESSION OF DATA AND TRANSMISSION THEREOF USING VIDEO TRANSMISSION STANDARDS - Systems, devices and methods are implemented for compressing high-definition video content. Consistent with one such implementation, a device is implemented for preparing a media stream containing high-definition video content for transmission over a transmission channel. A receiver unit is arranged to receive the media stream in a high-definition encoding format that does not compress the high-definition video content contained therein. A decoder unit is arranged to decode the media stream. A compression unit is arranged to compress the decoded media stream to produce a compressed media stream. An encapsulation unit is arranged to encapsulate the compressed media stream within an uncompressed video content format. An encoding unit is arranged to encode the encapsulated media stream using the high-definition format to produce a data stream and may be arranged to encrypt the data stream, e.g., using High-Bandwidth Digital Content Protection (HDCP).05-05-2011
20100220784Video Encoding Method and Decoding Method, Apparatuses Therefor, Programs Therefor, and Storage Media for Storing the Programs - By using parallax compensation which performs prediction by using parallax between video images, the video images are encoded as a single video image. Reference parallax for a target image to be encoded is set, wherein the reference parallax is estimated using a reference image; area division in an image frame is set; parallax displacement for each divided area is set, wherein the parallax displacement is the difference between the reference parallax and parallax for the parallax compensation; data of the area division is encoded; and data for indicating the parallax displacement is encoded. During decoding, reference parallax for a target image to be decoded is set, wherein it is estimated using a reference image; data for indicating area division, which is included in encoded data, is decoded; and data of parallax displacement, which is included in the encoded data, is decoded for each area indicated by the area division data.09-02-2010
20100177821Moving picture coding apparatus - A moving picture coding apparatus divides a picture into basic blocks and generates a prediction image of a block to be predicted in a basic block by using adjacent pixels in reference pixel blocks adjacent to the block to be predicted as reference pixels to perform predictive coding of a moving picture. When some of the reference pixels are not available, pixel values of the reference pixels that are not available are calculated based on pixels in the reference pixel blocks. The prediction image of the block to be predicted is generated by using the calculated pixel values instead of the reference pixels that are not available.07-15-2010
20100158112Method and apparatus for decoding/encoding a video siganl - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.06-24-2010
20110103475IMAGE ENCODING METHOD AND DEVICE, AND DECODING METHOD AND DEVICE THEREFOR - A video encoding method and apparatus and a video decoding method and apparatus. In the video encoding method, a first predicted coding unit of a current coding unit that is to be encoded is produced, a second predicted coding unit is produced by changing a value of each pixel of the first predicted coding unit by using each pixel of the first predicted coding unit and at least one neighboring pixel of each pixel, and the difference between the current coding unit and the second predicted coding unit is encoded, thereby improving video prediction efficiency.05-05-2011
20110110424Video Encoder and Data Processing Method - A video encoder for evaluating a prediction error by using a prediction technique include: an image encoding section which encodes a prediction image; and an encoding control device which selects any one of a plurality of prediction modes in prediction used by the image encoding section. The image encoding section performs clipping of higher-order bits of the prediction error input to the encoding control device and reduction of lower-order bits thereof for each of the prediction modes to control prediction mode selection, thus reducing the prediction error bit width to a predetermined bit width. The encoding control device sets to the image encoding section the number of higher-order bits to be clipped and the number of lower-order bits to be reduced. The predetermined bit width of the prediction error after bit width reduction is matched with the bus width used for prediction error transmission by the encoding control device and the image encoding section.05-12-2011
20130215965VIDEO ENCODING AND DECODING USING AN EPITOME - A method and apparatus are provided for encoding an image sequence. The method includes the following steps for at least one current image of the sequence, namely: construction of an epitome representative of the current image, from a set of at least two images from the sequence; and inter-image prediction of the current image from the epitome.08-22-2013
20100239005VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included.09-23-2010
20100239004VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included.09-23-2010
20100239002METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - A method of processing a video signal is disclosed. The present invention includes receiving prediction mode information of a current block, generating a half pel using an integer pel of a neighbor block, and generating a predictor of the current block using the half pel and the prediction mode information.09-23-2010
20100254452SYSTEM AND METHOD OF VIDEO DATA ENCODING WITH MINIMUM BASEBAND DATA TRANSMISSION - Just-in-time up-conversion utilizes frame tagging, and optionally pixel tagging, to minimize the data bandwidth required to drive a display. According to this approach video is maintained in its native frame rate until needed in the display device, such as for pixel control at the row/column drivers. By way of example, a frame tag comprises a repeat count and direction information upon which display refresh is based. In addition, pixel tagging can be utilized to dynamically configure the up-converter to generate pixel displacements within synthesized intermediate frames, such as based on different pixel layer representations. The data stream can utilize traditional fixed pixel lengths or variable pixel lengths to conserve additional bandwidth.10-07-2010
20100239000Camera Coupled Reference Frame - Techniques are provided for managing long-term reference frames (LTRFs) for two or more video sources. A first video source is selected from a plurality of video sources. The first video source is encoded to produce an encoded video stream, where a reference frame message identifies a recent video frame as long-term reference frame (LTRF) associated with the first video stream. The process is repeated for other video streams. The LTRF associated with the first video stream is used as a reference for temporal predictive coding upon receiving a signal that the first video source has been re-selected.09-23-2010
20100232500IMPROVEMENT FOR SPATIAL WYNER ZIV CODING09-16-2010
20100239003WYNER ZIV CODING09-23-2010
20100239001VIDEO STREAMING SYSTEM, TRANSCODING DEVICE, AND VIDEO STREAMING METHOD - A video streaming system includes a streaming server (09-23-2010
20100254454Apparatus for decoding video compression coded data - A decoding apparatus includes a standard predicted image generating unit which generates a standard decoded image and a standard predicted image of standard image quality; a non-standard decoded image generating unit which generates a non-standard decoded image different in image quality based on a prediction error information; a non-standard predicted image generating unit which generates a non-standard predicted image different in image quality based on the non-standard decoded image; and a correction value calculating unit which calculates correction values corresponding to differences between the standard and non-standard predicted images. The non-standard decoded image generating unit includes a predicted image reconstructing unit which corrects the non-standard predicted image, and a decoding unit which inverse-quantizes the prediction error information and adds the inverse-quantized prediction error information and the corrected non-standard predicted image to generate the non-standard decoded image.10-07-2010
20100254456DEVICE AND METHOD OF ENCODING MOVING IMAGE - An encoding device is a device for encoding a moving image and includes: an imaging unit that shoots a subject; an encoder circuit that encodes an input moving image; a stream buffer that accumulates the encoded data; a network circuit that transmits the encoded data in the stream buffer to a network; and a read position skipping unit that, when an accumulated amount of the accumulated data, which has been accumulated in the stream buffer, is greater than or equal to a threshold value, transmits the encoded data to the network after advancing a read position at which the encoded data is to be read to, for example, the head position of the latest I-picture.10-07-2010
20100254455IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - An image processing apparatus synchronizing a first video stream constituted of a plurality of image data items and a second video stream different from the first video stream, the image processing apparatus including a calculation section and a detection section. The calculation section calculates, based on a data size of each of the plurality of image data items constituting the first video stream and the data size of each of image data items constituting the second video stream, a correlation value that represents a degree of similarity between the plurality of image data items constituting the first video stream and the image data items constituting the second video stream. The detection section detects the image data items constituting the second video stream and corresponding to the plurality of image data items constituting the first video stream based on the correlation value.10-07-2010
20100208809METHODS AND APPARATUS FOR INTER-LAYER RESIDUE PREDICTION FOR SCALABLE VIDEO - There are provided methods and apparatus for inter-layer residue prediction for scalable video. An apparatus is described for an encoder for encoding a block of a picture, or a decoder for decoding a block of a picture, by applying inverse tone mapping to an inter-layer residue prediction process for the block, wherein the inverse tone mapping is performed in the pixel domain. Methods for encoding or decoding a block of a picture are also described; and performed by applying inverse tone mapping to an inter-layer residue prediction process for the block, wherein the inverse tone mapping is performed in the pixel domain.08-19-2010
20100208808Apparatus and Method for Coding an Information Signal into a Data Stream, Converting the Data Stream and Decoding the Data Stream - More customization and adaptation of coded data streams may be achieved by processing the information signal such that the various syntax structures obtained by pre-coding the information signal are placed into logical data packets, each of which being associated with a specific data packet type of a predetermined set of data packet types, and by defining a predetermined order of data packet types within one access unit of data packets. The consecutive access units in the data stream may, for example, correspond to different time portions of the information signal. By defining the predetermined order among the data packet types it is possible, at decoder's side, to detect the borders between successive access units even when removable data packets are removed from the data stream on the way from the data stream source to the decoder without incorporation of any hints into the reminder of the data stream. Due to this, decoders surely detect the beginnings and endings of access units and therefore are not liable to a buffer overflow despite a removal of data packets from the data stream before arrival at the decoder.08-19-2010
20100208813IMAGE CODING APPARATUS WITH SEGMENT CLASSIFICATION AND SEGMENTATION-TYPE MOTION PREDICTION CIRCUIT - A segmenting section divides an input image into a plurality of segments. A hierarchizing section determines classes of the respective segments according to a predetermined criterion, and produces a class identification signal indicating the classes of the respective segments. A coding section encodes the segmented image signal into code data while changing the value of a coding control parameter for each of the segments in accordance with the class identification signal. Examples of the coding control parameter are a coding time interval and precision of quantization.08-19-2010
20100208812IMAGE CODING APPARATUS WITH SEGMENT CLASSIFICATION AND SEGMENTATION-TYPE MOTION PREDICTION CIRCUIT - A segmenting section divides an input image into a plurality of segments. A hierarchizing section determines classes of the respective segments according to a predetermined criterion, and produces a class identification signal indicating the classes of the respective segments. A coding section encodes the segmented image signal into code data while changing the value of a coding control parameter for each of the segments in accordance with the class identification signal. Examples of the coding control parameter are a coding time interval and precision of quantization.08-19-2010
20100128785VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-27-2010
20100128783VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-27-2010
20120140821PIXEL ADAPTIVE INTRA SMOOTHING - The present invention relates to spatial prediction of pixels of a block, the block being a block of a digital image. In particular, for a block pixel at least one reference pixel(s) is selected and out of the selected reference pixel(s), the block pixel is predicted. In particular, the prediction of the block pixel is performed depending on the distance of this pixel to the reference pixel(s) from which it is to be predicted.06-07-2012
20080310507ADAPTIVE CODING OF VIDEO BLOCK PREDICTION MODE - This disclosure describes techniques for coding of header information of video blocks. In particular, the techniques of this disclosure select one of a plurality of prediction modes for use in generating a prediction block of a video block of a coding unit, the plurality of prediction modes including unidirectional prediction modes and multi-directional prediction modes that combine at least two unidirectional prediction modes. An encoding device encodes the prediction mode of the current video block based on prediction modes of one or more previously encoded video blocks of the coding unit. Likewise, a decoding unit receives encoded video data of a video block of a coding unit and decodes the encoded video data to identify one of a plurality of prediction modes for use in generating a prediction block of the video block based on prediction modes of one or more previously decoded video blocks of the coding unit.12-18-2008
20100086036Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list for inter-view prediction by appending an inter-view reference index to an initialized reference picture list for temporal prediction, the inter-view reference index being appended based on the view number information and the view identification information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list; 04-08-2010
20100054332MOVING PICTURE DECODING APPARATUS AND MOVING PICTURE DECODING METHOD - A moving picture decoding apparatus (03-04-2010
20120033731VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - While maintaining a high degree of freedom in choosing partition sizes and transformation sizes adapted for local characteristics of videos, the amount of metadata is decreased. A video encoding apparatus (02-09-2012
20090074060Method, medium, and apparatus for encoding and/or decoding video - A method, medium, and apparatus for encoding and/or decoding video by generating a scalable bitstream formed of a base layer bitstream and an enhancement layer bitstream so as to have forward compatibility, wherein the enhancement layer bitstream comprises a bit-depth field of the enhancement layer, a frame or a picture type field of the enhancement layer in consideration of a frame or a picture type of the base layer, an additional quantization information field for obtaining a quantization parameter of the enhancement layer together with a quantization parameter of the base layer, an intra-macroblock field of the enhancement layer, and an inter-macroblock field of the enhancement layer.03-19-2009
20090262807VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090262805VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.10-22-2009
20090323805VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information.12-31-2009
20110032988TRANSCODER, METHOD OF TRANSCODING, AND DIGITAL RECORDER - A transcoder reducing processing amount when a coded stream to which at least intra prediction is applied is transcoded into a coded stream to which intra prediction and inter prediction are applied. The transcoder (02-10-2011
20110032989MOVING PICTURE CODING DEVICE AND MOVING PICTURE CODING METHOD - Provided is a moving picture coding device which makes it possible to suppress deterioration in coding efficiency caused by flickers occurring at a time of high-speed capturing under fluorescent lamp lighting or the like.02-10-2011
20120195378PIXEL LEVEL ADAPTIVE INTRA-SMOOTHING - This disclosure describes intra-smoothing techniques for intra-coding of video data. In one example, a video encoder is configured to determine a plurality of prediction samples for intra-predictive coding of a block to be coded in a video frame, calculate a local statistic for a first prediction sample of the prediction samples, select a filter from a plurality of filters based on the local statistic, and apply the selected filter to the first prediction sample. The video encoder may also be configured to calculate at least one local statistic for each prediction sample of the prediction samples, select a filter from a plurality of different filters based on the at least one local statistic for each prediction sample, and apply each selected filter to the corresponding prediction sample to generate the filtered version of the prediction sample. Embodiments further include video decoders and method of decoding encoded video signals.08-02-2012
20120195377METHOD TO OPTIMIZE THE TRANSFORMS AND/OR PREDICTIONS IN A VIDEO CODEC - A joint optimization iterative algorithm determines optimized mode pairs. Each mode pair includes an intra-predictor and a transform pair that are iteratively modified to determine an optimized intra-predictor and an optimized transform that forms the optimized mode pair. A set of training videos and a set of quantization parameters (QPs) are used as the base data for determining the optimized mode pairs. Each video includes a plurality of pixel blocks, herein referred to as blocks. Block statistics associated with each mode pair are accumulated by separately encoding each block using each mode pair, and selecting the best mode pair for each block according to a measured characteristic of each encoding. The accumulated block statistics are used to modify the intra-predictor and the transform within each mode pair.08-02-2012
20120195376DISPLAY QUALITY IN A VARIABLE RESOLUTION VIDEO CODER/DECODER SYSTEM - In a video coder/decoder system using variable resolution adaptation, decoder techniques provide a mechanism to changing resolution of coded lower-resolution video to a higher resolution for rendering. Coded video data of a low resolution frame may be decoded. A motion estimation search may be performed between the decoded low resolution frame and a cache of previously-stored high resolution video frames. If the motion estimation search generates one or more matches, high resolution video data of the decoded frame may generated as a derivation of matching data from the cached video frames.08-02-2012
20090110072MOVING PICTURE PREDICTION METHOD, MOVING PICTURE CODING METHOD AND APPARATUS, AND MOVING PICTURE DECODING METHOD AND APPARATUS - A moving picture prediction method for enabling a calculation amount and a storage capacity to be reduced in a prediction about a moving picture by scaling processing is provided. A method for predicting the value P of Time T from the value P04-30-2009
20090110070IMAGE ENCODING DEVICE AND ENCODING METHOD, AND IMAGE DECODING DEVICE AND DECODING METHOD - In an image encoding/decoding device of the present invention, the prediction direction in a target block, i.e., a block which becomes the target of the intra-frame prediction processing, is estimated by taking advantage of pre-encoded blocks which are adjacent to the target block. First, as edge information on decoded images on the adjacent blocks, intensities and angles of the edges are calculated. Next, of the degrees of likelihood calculated with respect to each prediction direction by taking advantage of this edge information and, e.g., a neural network, the prediction direction whose degree of likelihood is the highest is employed as the prediction direction in the target block. Also, a variable-length code table is dynamically created based on the estimated result, which allows a significant reduction in the prediction-direction representing code amount.04-30-2009
20090110069Method and apparatus encoding and/or decoding image by using diffusion properties of the image - Provided are a method and apparatus for encoding/decoding a moving picture by using the diffusion properties of the image. In the method, a value of a current pixel is predicted from the values of neighboring pixels of the current pixel, based on the variations between the values of the neighboring pixels present in directions toward the current pixel; a correction value of the predicted value is calculated from at least one variation from among the variations; the value of the current pixel is determined by reflecting the correction value into the predicted value; and then, the original image is reconstructed using the determined value of the current pixel.04-30-2009
20090110068Coding Apparatus, Coding Method, Decoding Apparatus, Decoding Method, and Program - A coding apparatus for hierarchically (layering) coding top field data and bottom field data divided from each of a plurality of picture data composing a moving picture image has a first coding unit (04-30-2009
20090110067IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD AND IMAGE DECODING METHOD - An encoding device includes a color component separating unit for separating an input bit stream for the respective color components, a block dividing unit for dividing an input color component signal into blocks to generate a signal of an encoding unit area, a predicted image generating unit for generating a predicted image for the signal, a determining unit for determining a prediction mode used for encoding according to a prediction efficiency of the predicted image, a prediction error encoding unit for encoding a difference between the predicted image corresponding to the prediction mode determined by the determining unit and the input color component signal, and an encoding unit for variable length-coding the prediction mode, an output from the prediction error encoding unit, and a color component identification flag indicating the color component to which the input bit stream belongs as a result of the color component separation.04-30-2009
20130128963Multiple-Pass Rate Control for Video Coding Applications - Methods and systems for coding applications are described, where multiple coding passes are performed for purposes of rate control. Prediction structures are generated and used by the multiple coding passes to update coding statistics generated prior to the coding passes. The updated coding statistics are used for a subsequent coding operation.05-23-2013
20130128971TRANSFORMS IN VIDEO CODING - Aspects of this disclosure relate to coding video data. In an example, a method of coding video data includes determining a first residual quadtree (RQT) depth at which to apply one or more first transforms to residual video data based on at least one characteristic of the residual of video data. The method also includes determining a second RQT depth at which to apply one or more second transforms to the residual video data based on the at least one characteristic. The method also includes coding the residual video data using the one or more first transforms and the one or more second transforms.05-23-2013
20130128973METHOD AND APPARATUS FOR ENCODING AND DECODING AN IMAGE USING A REFERENCE PICTURE - A method and apparatus for encoding and decoding an image by performing motion prediction and compensation on pictures in a group of pictures by selectively using a high-quality key picture that is previously encoded and restored, and a second picture that is previously encoded and restored. The method of encoding an image improves the prediction efficiency of an image by storing a key picture, which is encoded and restored to a high quality by reducing a loss caused by a quantization error using a small quantization coefficient, in a first storage unit and storing a previously encoded and restored second picture in a second storage unit, and then performing motion prediction and compensation by selectively using the key picture stored in the first storage unit and the second picture stored in the second storage unit while encoding a next picture in a group of pictures.05-23-2013
20100278235VIDEO ENCODING/ DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included.11-04-2010
20100278234APPARATUS FOR CODING OR DECODING INTRA IMAGE BASED ON LINE INFORMATION OF REFERENCE IMAGE BLOCK - An apparatus for coding an image which may effectively code the image and an apparatus for decoding an image which may decode the effectively coded image. The apparatus for coding the image includes: an input image segmentation unit to segment an input image into a plurality of image blocks including a first image block and a second image block; a waveform information generation unit to select a plurality of reference pixels from among pixels included in the first image block, generate first waveform information about the first image block based on a pixel value difference between the selected plurality of reference pixels, and generate second waveform information about the second image block based on a pixel value difference between the pixels included in the second image block; and coding unit to code an image included in the second image block based on the first waveform information and second waveform information.11-04-2010
20090110071VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-30-2009
20100278233MOVING IMAGE ENCODING APPARATUS AND MOVING IMAGE ENCODING METHOD - There is provided a moving image encoding apparatus comprising: an encoding unit which encodes moving image data using inter-frame prediction, the moving image data being input by an image pickup unit which captures an object image, and generates an encoded bitstream; a setting unit which performs settings for an encoding process performed by the encoding unit; a transmitting unit which transmits setting information created by the setting unit to an external moving image encoding apparatus; a receiving unit which receives setting information for an encoding process transmitted by the external moving image encoding apparatus; and an encoding control unit which controls the encoding process performed by the encoding unit in accordance with a first setting made by the setting unit and a second setting based on the setting information received by the receiving unit.11-04-2010
20100303152Method And System For Decoding Digital Video Content Involving Arbitrarily Accessing An Encoded Bitstream - A technique for decoding an encoded bitstream of digital video content involves decoding a bitstream, wherein decoding the bitstream generates decoded syntax elements and decoded pixel information, creating an access point in the currently decoded bitstream by saving state information related to the decoding, saving the decoded syntax elements, and saving the decoded pixel information, and synchronizing a subsequent decoding operation to the access point utilizing the saved state information, the saved decoded syntax elements, and the saved decoded pixel information.12-02-2010
20130136174LUMA-BASED CHROMA INTRA PREDICTION - Systems, devices and methods for performing luma-based chroma ultra prediction are described. Down-sample filters may be applied to luma values of luma pixel positions to generate reconstructed luma values for chroma pixel positions in a prediction unit of an intra frame. The down-sampled reconstructed luma values may then be used to predict chroma values for the chroma pixel positions. In some implementations, a reconstructed luma value of a chroma position may be used to predict that position's chroma value. In other implementations, reconstructed luma values of neighboring chroma pixel positions may be analyzed to adaptively predict a chroma value for a chroma pixel position.05-30-2013
20130136176ACTIVATION OF PARAMETER SETS FOR MULTIVIEW VIDEO CODING (MVC) COMPATIBLE THREE-DIMENSIONAL VIDEO CODING (3DVC) - In general, techniques are described for separately coding depth and texture components of video data. A video coding device for coding video data that includes a view component comprised of a depth component and a texture component may perform the techniques. The video coding device may comprise, as one example, a processor configured to activate a parameter set as a texture parameter set for the texture component of the view component, and code the texture component of the view component based on the activated texture parameter set.05-30-2013
20130136177VIDEO DECODING APPARATUS, VIDEO CODING APPARATUS, VIDEO DECODING METHOD, VIDEO CODING METHOD, AND PROGRAM - In the present invention, reconstructed images for prediction are stored in uncompressed reference picture memory and compressed reference picture memory. A video decoder stores in uncompressed reference picture memory a reconstructed image of a frame to be decoded which has been generated on the basis of a prediction, and among reconstructed images which have been stored in the uncompressed reference picture memory, compresses a reconstructed image that will not be used for prediction of the frame to be decoded and stores the image in the compressed reference picture memory. Using the reconstructed images which are stored in the uncompressed reference picture memory and the compressed reference picture memory, the video bitstream is decoded into a video.05-30-2013
20110122947IMAGE DECODING APPARATUS AND METHOD FOR HANDLING INTRA-IMAGE PREDICTIVE DECODING WITH VARIOIUS COLOR SPACES AND COLOR SIGNAL RESOLUTIONS - The present invention is directed to an image information decoding apparatus adapted for performing intra-image decoding based on resolution of color components and color space of an input image signal. An intra prediction unit serves to adaptively change block size in generating a prediction image based on a chroma format signal indicating whether resolution of color components is one of 4:2:0 format, 4:2:2 format, and 4:4:4 format, and a color space signal indicating whether color space is one of YCbCr, RGB, and XYZ. An inverse orthogonal transform unit and an inverse quantization unit serve to also change orthogonal transform technique and quantization technique in accordance with the chroma format signal and the color space signal. A decoding unit decodes the chroma format signal and the color space signal to generate a prediction image corresponding to the chroma format signal and the color space signal.05-26-2011
20100303151Method for decoding video signal encoded using inter-layer prediction - A method for receiving and decoding an encoded bitstream of a first layer and an encoded bitstream of a second layer into a video signal is provided. It is determined whether or not a block temporally coincident with a target block in a picture of the first layer is present in the bitstream of the second layer. An operation for checking information (intra_base_flag and residual_prediction_flag) indicating whether or not the target block has been predicted based on data of a block in a different layer corresponding to the target block is skipped if no block temporally coincident with the target block is present in the bitstream of the second layer. This method eliminates the need for encoders to transmit unnecessary information (intra_base_flag and residual_prediction_flag) when performing inter-layer prediction using a temporally adjacent frame.12-02-2010
20100309977Adaptive Intra Mode Selection - In video encoding and decoding predictions may be generated by intra-frame prediction. Intra-frame prediction uses reconstructed pixels in a reconstructed frame. Intra-frame prediction is performed by extending the reconstructed pixels into a predicted block using intra-frame prediction modes, each intra-frame prediction mode indicating a direction of the extension. In order to reduce the number of possible intra-frame prediction modes, a subset is selected from a predetermined set of possible intra-frame prediction modes. A subset of intra-frame prediction modes can be created by forming preselection sets of intra-frame prediction modes on the basis of similarity of their associated predicted blocks and selecting a representative intra-frame prediction mode from each preselection set.12-09-2010
20100309976METHOD AND APPARATUS FOR ENHANCING REFERENCE FRAME SELECTION - A method and apparatus for selecting a reference frame for producing an encoded image. The method includes retrieving a histogram for a current frame, determining the difference between the histogram and a previous histogram, and calculating adaptive threshold utilizing the determined difference and encoding the frame as intra frame if it is an intra frame, and selecting a reference frame and encoding the frame as non-intra frame if the frame is a non-intra frame.12-09-2010
20100322309METHOD FOR SPATIAL ERROR CONCEALMENT - A method for performing spatial error concealment is provided. The method includes the following steps: detecting a damaged macroblock; obtaining coding information of neighboring macroblocks of the damaged macroblock; determining edge feature of the damaged macroblock based on the coding information; and according to the edge feature, selecting a bilinear interpolation algorithm or a directional interpolation algorithm to conceal errors within the damaged macroblock.12-23-2010
20100322311Method and System for Decoding Multiview Videos with Prediction Dependencies - Multiview videos are acquired of a scene with corresponding cameras arranged at poses, such that there is view overlap between any pair of cameras. V-frames are generated from the multiview videos. The V-frames are encoded using only spatial prediction. Then, the V-frames are inserted periodically in an encoded bit stream to provide random temporal access to the multiview videos. Additional view dependency information enables the decoding of a reduced number of frames prior to accessing randomly a target frame for a specified view and time, and decoding the target frame. The method also decodes multiview videos by maintaining a reference picture list for a current frame of a plurality of multiview videos, and predicting each current frame of the plurality of multiview videos according to reference pictures indexed by the associated reference picture list.12-23-2010
20100322310Video Processing Method - A first video stream is analyzed for generating consecutive video segments. Each video segment indicates a specific scene in the video stream. A first intra frame is added at a start of each of the video segments, and second intra frames are inserted each fixed interval of video frames from the start of each of the video segments for spacing two consecutive second intra frames by the fixed interval of video frames in each of the video segments.12-23-2010
20090067495RATE DISTORTION OPTIMIZATION FOR INTER MODE GENERATION FOR ERROR RESILIENT VIDEO CODING - Optimal selection of an inter mode is provided for video data being encoded to achieve enhanced error resilience when the video data is decoded. End to end distortion cost from encoder to decoder for inter mode selection is determined based on residue energy and quantization error. Using the distortion cost function based on residue energy and quantization error, and an optimal Lagrangian parameter, the optimal inter mode is selected for use during encoding for maximum error resilience. The optimal Lagrangian parameter can be set to be proportional to an error-free Lagrangian parameter with a scale factor determined by packet loss rate.03-12-2009
20110110425Video Encoder and Method for Performing Intra-Prediction and Video Data Compression - The invention provides a method for performing intra-prediction. A target pixel is selected from a plurality of pixels of a current block. A first intra-prediction mode of a left block and a second intra-prediction mode of an up block are then determined A first prediction value of the target pixel is calculated according to the first intra-prediction mode. A second prediction value of the target pixel is calculated according to the second intra-prediction mode. The first prediction value and the second prediction value are then weighted-averaged to obtain a weighted-average prediction value as an intra-prediction value of the target pixel.05-12-2011
20110019739Method for modeling coding information of a video signal to compress/decompress the information - A method and an apparatus of decoding a video signal are provided. The present invention includes the steps of parsing first coding information indicating whether a residual data of an image block in the enhanced layer is predicted from a corresponding block in the base layer, from the bitstream of the enhanced layer, and decoding the video signal based on the first coding information. And, the step of parsing includes the step of performing modeling the first coding information based on second coding information indicating whether prediction information of the corresponding block in the base layer is used to decode the image block in the enhanced layer. Accordingly, the present invention raises efficiency of video signal processing by enabling a decoder to derive information on a prediction mode of a current block in a decoder instead of transferring the information to the decoder.01-27-2011
20110026591SYSTEM AND METHOD OF COMPRESSING VIDEO CONTENT - A method of compressing video content is disclosed and may include receiving an image frame of a video signal having multiple components, generating an edge-map for the image frame, generating a bitstream base layer for each component of the video signal, generating a first bitstream enhancement layer for each component of the video signal, and generating successive bitstream enhancement layers for each component of the video signal. As the successive bitstream enhancement layers are generated, the method of compressing video content goes from lossy to lossless.02-03-2011
20110026592INTRA BLOCK WALK AROUND REFRESH FOR H.264 - An apparatus and method for digital video encoding is disclosed. The disclosed system provides for an improved way of correcting divergence of a reference block in a decoder while minimizing the overhead required to update the reference block.02-03-2011
20110026594CODING AND DECODING OF AN IMAGE OR OF A SEQUENCE OF IMAGES SLICED INTO PARTITIONS OF PIXELS OF LINEAR FORM - A method is provided of coding an image or a sequence of images generating a stream of data comprising data representative of at least one group of pixels in one of said images. Such a method comprises the steps of: selecting, for a group of pixels to be coded, an initial partition of predetermined linear form, slicing said group of pixels to be coded according to said selected initial partition, propagating said initial partition selected in said group of pixels to be coded, until the latter is sliced in its entirety into a plurality of partitions of predetermined form, selecting, for said sliced group of pixels, a predetermined order of traversal of said partitions, predicting and coding said partitions one after the other, according to said selected order of traversal.02-03-2011
20110032987Apparatus and method of encoding and decoding image data using color correlation - An image data encoding apparatus and method and an image data decoding apparatus and method are provided. The image data encoding apparatus may perform at least one image prediction with respect to image data, and select a prediction mode for encoding. The image data encoding apparatus may simultaneously perform both intra prediction and color prediction, and thereby may efficiently perform encoding.02-10-2011
20100172413VIDEO DECODER AND DIGITAL BROADCAST TRANSRECEIVER - A video decoder includes a storage unit that stores therein vector data; and a video generating unit that, when an input stream is abnormal, generates based on data before the input stream became abnormal and the vector data stored in the storage unit, an image that is an image displayed using the data before the input stream became abnormal and to which motion has been added.07-08-2010
20100172411HIGH DYNAMIC RANGE CODECS - A method for encoding high dynamic ränge (HDR) images involves providing a lower dynamic ränge (LDR) image, generating a prediction function for estimating the values for pixels in the HDR image based on the values of corresponding pixels in the LDR image, and obtaining a residual frame based on differences between the pixel values of the HDR image and estimated pixel values. The LDR image, prediction function and residual frame can all be encoded in data from which either the LDR image of HDR image can be recreated.07-08-2010
20110116544METHODS OF INTRA PREDICTION, VIDEO ENCODER, AND VIDEO DECODER THEREOF - A method of intra prediction includes the steps of: receiving a video input having a plurality of blocks; encoding and reconstructing the plurality of blocks one by one; after encoding and reconstructing a designated block of the plurality of blocks to generate a designated reconstructed block, performing a deblocking operation upon the designated reconstructed block so as to generate a reference block with at least one sample being deblocked; and performing an intra prediction operation upon a current block by using samples of the reference block generated by the deblocking operation.05-19-2011
20100150230VIDEO CODING SYSTEM USING SUB-CHANNELS AND CONSTRAINED PREDICTION REFERENCES TO PROTECT AGAINST DATA TRANSMISSION ERRORS - A coding technique is disclosed in which frames of a video sequence are assigned to one of a plurality of sub-channels to be transmitted to a decoder. The frames are coded according to predictive coding techniques such that ordinarily prediction references of the frames in each sub-channel only reach the reference frames that occur within the same sub-channel. Thus, if transmission errors arise with respect to one sub-channel, decoding may occur for other sub-channels until the transmission error is detected and corrected. The decoder may also try to reconstruct the frames in the failed sub-channel by interpolating from the frames in other channels. Furthermore, when feedback scheme is available between the encoder and decoder, the encoder may restart the failed sub-channel by coding the next frames in the sub-channel by predicting from correctly received frames in other sub-channels. And the encoder and decoder may resume normal encoding and decoding once the restart frame is sent and received, respectively. Additionally, the encoder and decoder can maintain an identical and correctly received long-term reference frame that can be used to restart all sub-channels in cases all sub-channels are corrupted at one point. The long-term reference frame can be refreshed periodically.06-17-2010
20110211636IMAGE ENCODER AND IMAGE DECODER - An image encoder includes a preprocessing unit 09-01-2011
20110243225DETERMINING INTRA PREDICTION MODE OF IMAGE CODING UNIT AND IMAGE DECODING UNIT - A method and apparatus for determining an intra prediction mode of a coding unit. Candidate intra prediction modes of a chrominance component coding unit, which includes an intra prediction mode of a luminance component coding unit, are determined, and costs of the chrominance component coding unit according to the determined candidate intra prediction modes are compared to determine a minimum cost intra prediction mode to be the intra prediction mode of the chrominance component coding unit.10-06-2011
20110243226LOW COMPLEXITY ENTROPY-ENCODING/DECODING METHOD AND APPARATUS - Entropy encoding and entropy decoding of image data are respectively performed whereby context modeling is performed on a context unit of blocks of the image data based on a context model of a previously encoded or decoded block.10-06-2011
20110243224Methods and Apparatus Using Virtual Reference Pictures - There are provided methods and apparatus using virtual reference pictures. An apparatus includes an encoder for encoding at least one picture, using at least one virtual reference picture, to form a resultant bitstream. The at least one virtual reference picture is different than a previously decoded picture.10-06-2011
20110122944PARALLEL DECODING FOR SCALABLE VIDEO CODING - A method for decoding a stream encoded using a scalable video coding and including a plurality of layers of frames divided into a plurality of blocks, decodes block-wise in parallel the layers of the stream. A target block in an enhancement layer is decoded as soon as the block data required for its decoding are available from the reference layer.05-26-2011
20110075732APPARATUS AND METHOD FOR ENCODING AND DECODING MOVING IMAGES - According to an embodiment, a moving image encoding method includes generating a predicted image of an original image based on a reference image, performing transform and quantization on a prediction error between the original image and the predicted image to obtain a quantized transform coefficient, performing inverse quantization and inverse transform on the quantized transform coefficient to obtain a decoded prediction error, adding the predicted image and the decoded prediction error to generate a local decoded image, setting filter data containing time-space filter coefficients for reconstructing the original image based on the local decoded image and the reference image, performing a time-space filtering process on the local decoded image in accordance with the filter data to generate a reconstructed image, storing the reconstructed image as the reference image, and encoding the filter data and the quantized transform coefficient.03-31-2011
20100135387METHOD AND APPARATUS FOR CONTEXT DEPENDENT MERGING FOR SKIP-DIRECT MODES FOR VIDEO ENCODING AND DECODING - There are provided methods and apparatus for context dependent merging for SKIP/DIRECT modes for video encoding and decoding. An apparatus includes an encoder for joint coding partitions of an image region using frame partitioning and a partition merging procedure, wherein any given one of the partitions that use a coding mode with implicit coding rules is subject to being merged, with another one of the partitions, using a distinct merging rule different than that used for a coding mode with explicit coding rules.06-03-2010
20090080520VIDEO DECODING APPARATUS AND VIDEO DECODING METHOD - According to one embodiment, a video decoding apparatus includes a decoding module configured to decode syntax values of respective macroblocks included in a picture to be decoded in the video stream, an error detection module configured to detect an error in the syntax values decoded by the decoding module, and an error concealment processing module configured to execute, in the case where the picture to be decoded whose error has been detected by the error detection module is an intra-frame prediction picture for which motion compensation prediction processing is not performed, error concealment processing of rewriting the syntax values of the macroblock in which an error has been detected and subsequent macroblocks so as to estimate, from information of the intra-frame prediction picture or data of macroblocks that have been decoded, data of the macroblock in which an error has been detected and subsequent macroblocks.03-26-2009
20100226431Video encoder and decoder apparatus deciding error in transform coefficients between an original image and a predictive image - A video encoder apparatus using a distributed video coding (DVC) includes a Wyner-Ziv frame encoder for forming a predictive image of a Wyner-Ziv frame on the basis of coded key frames, and determining, according to the fallibility of the transform coefficients of the predictive image with respect to the transform coefficients of an original image based on the Wyner-Ziv frame, the amount of error correction codes to be transmitted so as to transmit the error correction codes corresponding to the determined amount. When no errors are found between the transform coefficients of the original image of the Wyner-Ziv frame and the predictive image, information indicating that no errors are found is sent out instead of the error correction codes for the Wyner-Ziv frame in question.09-09-2010
20100226432INTERPOLATION FILTERING METHOD, IMAGE CODING METHOD, IMAGE DECODING METHOD, INTERPOLATION FILTERING APPARATUS, PROGRAM, AND INTEGRATED CIRCUIT - An interpolation filtering method includes selecting (S09-09-2010
20120134414INTERPOLATION OF VIDEO COMPRESSION FRAMES - Coding techniques for a video image compression system involve improving an image quality of a sequence of two or more bi-directionally predicted intermediate frames, where each of the frames includes multiple pixels. One method involves determining a brightness value of at least one pixel of each bi-directionally predicted intermediate frame in the sequence as an equal average of brightness values of pixels in non-bidirectionally predicted frames bracketing the sequence of bi-directionally predicted intermediate frames. The brightness values of the pixels in at least one of the non-bidirectionally predicted frames is converted from a non-linear representation.05-31-2012
20110134999METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - A method and apparatus for encoding a video, and a method and apparatus for decoding a video, for increasing image compression efficiency by spatially transforming, scaling and frequency-transforming residual image data. The method of encoding an image includes spatially transforming a residual block through performing wavelet transformation or downsampling on the residual block to have a size that is equal to or smaller than a maximum size of a transformation unit when the size of the residual block is larger than the maximum size of the transformation unit, and transforming the spatially transformed residual block to a frequency domain.06-09-2011
20110249733Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. According to a second aspect of the present invention, when a block is in a first set of blocks, a predicted intra-prediction mode for the block may be predicted based on the intra-prediction modes of available blocks within the first set and of blocks in available neighboring macroblocks. According to a third aspect of the present invention, when a block is in the first set of blocks, a predicted intra-prediction mode for the block may be predicted based on the intra-prediction modes of blocks in available neighboring macroblocks.10-13-2011
20110249736Codeword restriction for high performance video coding - A system for encoding and/or decoding video that includes the use of restricted codewords. The use of restricted codewords permits a reduction in the bit-rate of the video bit stream without substantially impacting the resulting image quality.10-13-2011
20110243227MOVING PICTURE DECODING METHOD AND DEVICE, AND MOVING PICTURE ENCODING METHOD AND DEVICE - The objective is to reduce the amount of code in the encoding/decoding process for a moving picture. In an intra prediction process, the degree of ease of estimating the prediction direction or the block mode for a block to be decoded is determined based on the prediction direction data or the block mode for multiple adjacent blocks which have been decoded previously and which are adjacent to the block to be decoded; the prediction direction data or the block mode for the block to be decoded is decoded based on the result of said determination; and intra prediction is performed based on the decoded prediction direction data or the block mode to generate decoded image data.10-06-2011
20110085592VIDEO FRAME LOSS RECOVERY SCHEME - A video frame loss recovery scheme essentially belongs to a loss packet in a low overhead and low complicated recovery scheme and serves to protect P-frames of a group of pictures (GOP). Namely, if a P-frame of the same group of pictures loses during the transmission, a compensation frame could be applied to serve and recovered as a lost P-frame, thereby promoting to a preferable video presenting performance of a receiver.04-14-2011
20100177822FILTER PREDICTION BASED ON ACTIVITY METRICS IN VIDEO CODING - This disclosure describes techniques associated with filtering of video data in a video encoding and/or decoding process. In accordance with this disclosure, filtering is applied at an encoder, and filter information is encoded in the bitstream to identify the filtering that was applied at the encoder. Different types of filtering may be applied based on an activity metric determined for the video data. Moreover, in accordance with this disclosure, the manner in which the filter information is encoded into the bitstream may be dependent on the activity metric. In particular, for a first range of the activity metric, one or more filters are encoded directly, and for a second range of the activity metric, one or more filters are predictively encoded.07-15-2010
20090323806VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding apparatus comprises a frame memory/predictive image generator having a first predictive mode for generating a predictive image signal by selecting a combination from among a plurality combinations of a reference image number and a plurality of predictive parameters, and a second predictive mode for generating a predictive image signal according to a predictive parameter computed based on reference image numbers of reference images and an image-to-image distance, and a variable-length encoder to select one of the first and second prediction modes by the number of reference images, and encode orthogonal transformation coefficient information concerning a predictive error signal of a predictive image signal with respect to input video signal, mode information indicating an encoding mode, motion vector information and combination of selected reference image number with predictive parameter index information indicating combination of selected reference image information.12-31-2009
20100061452METHOD AND APPARATUS FOR VIDEO ERROR CONCEALMENT USING HIGH LEVEL SYNTAX REFERENCE VIEWS IN MULTI-VIEW CODED VIDEO - There are provided a method and apparatus for video error concealment using high level syntax reference views in multi-view coded video. The apparatus includes a decoder for decoding pictures for at least one view corresponding to multi-view video content from a bitstream. The pictures are representative of at least a portion of a video sequence. At least some of the pictures correspond to different time instances in the video sequence. The decoder determines whether any of the pictures corresponding to a particular one of the different time instances are lost using an existing syntax element. The existing syntax element is for indicating at least one reference view used for inter-view prediction of at least one of the pictures.03-11-2010
20120243606METHODS, APPARATUSES AND COMPUTER PROGRAMS FOR VIDEO CODING - There is disclosed apparatuses, methods and computer programs for video coding. One or more subsets of a set of operations is determined; an operation among the operations within said subset of operations is selected; and an indication on the subset and on the selected operation is provided at the encoding. The decoding comprises determining one or more subsets of a set of operations; receiving a subset indication indicative of a selected subset among said one or more subsets and for receiving an operation indication indicative of an operation selected among operations within said selected subset; and selecting an operation on the basis of said operation indication.09-27-2012
20100054333VIDEO TRAFFIC BANDWIDTH PREDICTION - Video traffic bandwidth prediction may be provided. Frames of a video stream may be encoded according to a compression scheme. The encoded frames may be received and, depending on the type of frame, may be used to predict the size of other frames of the stream. The predicted frame sizes may then be used to allocate bandwidth for transmission of the video stream.03-04-2010
20100054331VIDEO ENCODING WITH INTRA ENCODING SELECTION - The method, for the determination of the coding mode of a macroblock constituted of picture blocks, carries out a pre-selection of intra directional predictive coding modes of macroblock blocks according to the following steps: 03-04-2010
20100061453VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.03-11-2010
20110103474APPARATUS FOR TRANSFORMING MEDIUM GRAINED SCALABILITY-BASED SCALABLE VIDEO CODING BITSTREAM INTO ADVANCED VIDEO CODING BITSTREAM - A Medium Grained Scalability (MGS)-to-Advanced Video Coding (AVC) transform apparatus may modify an accumulated residual signal of at least one MGS layer of a key picture, included in an MGS-based Scalable Video Coding (SVC) bitstream, and rewrite the MGS-based SVC bitstream into an AVC bitstream.05-05-2011
20100128781METHOD AND APPARATUS FOR CODING AND DECODING USING BIT-PRECISION - Discussed are a method and an apparatus of encoding/decoding by using a bit precision. In accordance to an aspect of the present invention, it is possible to encoding and decoding an image or a video by using a bit precision. Accordingly, compression efficiency can be improved and the decoding complexity can be reduced by encoding/decoding video data by use of the bit precision.05-27-2010
20090028241Device and method of coding moving image and device and method of decoding moving image - In the intra-screen predictive coding according to the H.264/AVC, adjacent encoded pixels are used to perform prediction of a target block, so that the prediction needs to be performed by referencing spatially-separate pixels. As such, the prediction accuracy is not always sufficient.01-29-2009
20090213931VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.08-27-2009
20110249739CONTEXT ADAPTIVE DIRECTIONAL INTRA PREDICTION - Enhanced directional prediction apparatus and methods are taught which are based on edge-based adaptive directional estimation, for providing an improved prediction direction for intra prediction within a coding device. Image gradient vectors are obtained for pixels in the neighborhood of the current block, and edge directions determined. Candidate edge directions are processed to derive a dominant edge direction in response to defining an objective function as a summation of projections to a candidate direction and computing suggested direction of each neighboring pixel. The dominant edge direction may be utilized for the prediction direction, such as in response to a detection mode flag signaled to the decoder, or modified by an angular adjustment, which can be communicated to a decoder.10-13-2011
20110249735Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. The pixel values for a block within a first set of blocks may be predicted using reconstructed values from only neighboring macroblocks. The pixel values for a block within another set of blocks may be subsequently predicted using reconstructed values from blocks in previously reconstructed sets of blocks and/or reconstructed values from neighboring macroblocks. A reconstructed block used in the prediction may be above, below, to left of or to the right of the block being predicted. The pixel values for blocks within a set of blocks may be predicted in parallel.10-13-2011
20110249734Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. According to another aspect of the present invention, the pixel values for a block within a first set of blocks may be predicted using reconstructed values from only neighboring macroblocks, wherein the reconstructed values may be weighted according to their distance from the block.10-13-2011
20110249732Methods and Systems for Intra Prediction - Aspects of the present invention relate to systems and methods for intra prediction. According to one aspect of the present invention, a macroblock may be partitioned into two, or more, sets of blocks. The pixel values for a block within a first set of blocks may be predicted using reconstructed values from only neighboring macroblocks. The pixel values for a block within another set of blocks may be subsequently predicted using reconstructed values from blocks in previously reconstructed sets of blocks and/or reconstructed values from neighboring macroblocks. The block residuals for the first set of blocks may be signaled, and the block residuals for subsequently predicted blocks may be signaled. The pixel values for blocks within a set of blocks may be predicted in parallel.10-13-2011
20110080948METHOD AND SYSTEM FOR 3D VIDEO DECODING USING A TIER SYSTEM FRAMEWORK - A video receiver receives a layered and predicted compressed 3D video comprising a base view video and an enhancement view video. A portion of pictures in the received compressed 3D video are selected to be decoded for display at an intended pace. Pictures in the received compressed 3D video are generated based on a tier system framework with tiers ordered hierarchically according to corresponding decodability. Each picture in the base view and enhancement view videos belongs to one of the plurality of tiers. A picture in a particular tier does not depend directly or indirectly on pictures in a higher tier. Each tier comprises one or more pictures with the same coding order. The video receiver decodes the pictures with the same coding order in parallel, and adaptively decodes the selected pictures according to corresponding coding layer information. The selected pictures are determined based on a particular display rate.04-07-2011
20110080947Line-Based Compression for Digital Image Data - A method of compressing digital image data is provided that includes selecting an entropy code for encoding a line of pixels in the digital image data, wherein the entropy code is selected from a plurality of variable length entropy codes, using spatial prediction to compute a pixel predictor and a pixel residual for a pixel in the line of pixels, and selectively encoding the pixel residual using one of the entropy code or run mode encoding.04-07-2011
20110080949IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM - An image processing apparatus includes: a storage means for storing a decoded image, which is obtained by encoding pictures constituting a frame sequential, in which pictures of a first image and a second image each having a disparity are alternately arranged, and performing local decoding, as a reference picture which is referenced when a predicted image is created for use in temporally later predictive encoding; and a storage control means for performing storage control to control the storage of the reference picture in the storage means such that, from among the pictures which are encoded temporally earlier than a current picture in encoding process which is a picture to be encoded, and are capable of becoming reference pictures, a picture which is a picture of an image at the same viewpoint as the current picture in encoding process from among the first image and the second image and is closest to the current picture in encoding process in a display order is stored in the storage means.04-07-2011
20110075733Moving picture encoding apparatus and distribution system - A moving picture encoding apparatus divides a moving picture signal into key frames and non-key frames, encodes the key frames, predicts the non-key frames from the encoded key frames, determines a final encoding rate for each non-key frame, encodes each non-key frame, and outputs an error-correcting code at the final encoding rate as encoded data of the non-key frame. To determine the final encoding rate, the number of error-correcting bits needed to correct prediction errors is estimated by a first method and one or more second methods. The second methods are used to decide whether to use the number of bits estimated by the first method as the final encoding rate, or whether to supplement the estimated number of bits by adding an encoding rate correction. As a result, the encoding rate is not supplemented unnecessarily and the encoding efficiency is improved.03-31-2011
20110069757CONTENT ADAPTIVE VIDEO ENCODER AND CODING METHOD - A method of pre-processing a sequence of video picture data comprising I pictures, P pictures and B pictures, where the pictures are arranged as a plurality of Group Of Pictures (GOP) and each of the Group Of Pictures has a first picture and a plurality of Sub Group of Pictures (Sub-GOP). The method uses an analysis of the sequence of video picture data to determine a position of a scene change relative to a position of a start of a new GOP within the sequence of video picture data and then moves the start of the new GOP to coincide with the scene change by extending or decreasing a current GOP length according to whether the scene change and the start of a new GOP are within a predetermined number of pictures of each other. An apparatus for carrying out the method is also provided.03-24-2011
20110069756PREDICTIVE ENCODING/DECODING METHOD AND APPARATUS - A predictive encoding/decoding method and apparatus in which the decoder signals available reference frames for use by the encoder for subsequent encoding.03-24-2011
20120201300ENCODING/DECODING METHOD AND DEVICE FOR HIGH-RESOLUTION MOVING IMAGES - Disclosed is a high-resolution video encoding/decoding method and apparatus. The video encoding method includes: predicting a current block to generate a predicted block, subtracting the predicted block from the current block to generate a residual block, determining a transform and quantization type according to the block type of the current block; transforming and quantizing the residual block according to the determined transform and quantization type; and encoding the transformed and quantized residual block. According to the video encoding/decoding method and apparatus, not only the encoding efficiency can be improved because it enables an encoding using a high correlation between temporally/spatially adjacent pixels appearing in a video, but the compression efficiency can also be improved by reducing block distortion.08-09-2012
20120201299IMAGING APPARATUS, RECEIVING APPARATUS, VIDEO TRANSMISSION SYSTEM, AND VIDEO TRANSMISSION METHOD - An imaging apparatus includes: an encoded-data generating section configured to generate encoded data including a first picture that can be decoded without referring to other pictures and one or more second pictures that can be decoded referring to other pictures; a transmission-data generating section configured to combine the first picture of the encoded data and the one or more second pictures of encoded data immediately preceding the encoded data to generate transmission data; and a radio communication section configured to intermittently transmit, in a unit of the transmission data, a plurality of the transmission data included in a video stream.08-09-2012
20110150087METHOD AND DEVICE FOR IMAGE ENCODING/DECODING USING ARBITRARY PIXELS IN A SUB-BLOCK - A video encoding/decoding method and apparatus using arbitrary pixels in each sub-block are disclosed. The present disclosure comprises an extractor, a first predictor, a first subtractor, a first transformer, a first quantizer, a first inverse quantizer, a first inverse transformer, a first adder, a second predictor, a second subtractor, a combiner for combining arbitrary residual pixels, a second transformer, a second quantizer, and an encoder whereby arbitrary pixels may be extracted from the respective sub-blocks of a current block and then encoded and decoded into reconstructed arbitrary pixels, which are used to predict and encode the remaining pixels of the respective sub-blocks. According to the disclosed encoding and decoding of a video, an intra prediction of pixels in a block to currently encode or decode is improved in accuracy to increase the video coding efficiency.06-23-2011
20110150085TEMPORAL AND SPATIAL VIDEO BLOCK REORDERING IN A DECODER TO IMPROVE CACHE HITS - This disclosure describes techniques in which the decoding order of video blocks is modified relative to the display order of video blocks. The decoding order may be modified temporally such that video blocks of different video frames (or other coded units) are decoded in an alternating manner. In this case, the decoding order of video blocks may alternate between video blocks of two or more different frames. Furthermore, the decoding order may also be modified spatially within a given video block such that the video blocks are decoded in an order that does not correspond to the raster scan order of the video blocks. The techniques may improve the use of memory by improving the likelihood of cache hits, thereby reducing the number of memory loads from an external memory to an internal cache associated with the decoder.06-23-2011
20110249737MIXED TAP FILTERS - During the prediction stage of a video encoding and/or decoding process, a video coder can use relatively longer filters for certain motion vectors pointing to certain sub-pixel positions and relatively shorter filters for motion vectors pointing to other sub-pixel positions, where a longer filter generally refers to an interpolation filter with a greater number of filter coefficients, also called taps, while a shorter filter generally refers to an interpolation filter with fewer taps.10-13-2011
20130163665MOVING IMAGE ENCODING APPARATUS AND MOVING IMAGE ENCODING METHOD - There is provided a moving image encoding apparatus comprising: an encoding unit which encodes moving image data using inter-frame prediction, the moving image data being input by an image pickup unit which captures an object image, and generates an encoded bitstream; a setting unit which performs settings for an encoding process performed by the encoding unit; a transmitting unit which transmits setting information created by the setting unit to an external moving image encoding apparatus; a receiving unit which receives setting information for an encoding process transmitted by the external moving image encoding apparatus; and an encoding control unit which controls the encoding process performed by the encoding unit in accordance with a first setting made by the setting unit and a second setting based on the setting information received by the receiving unit.06-27-2013
20100296578SYSTEM AND METHOD FOR INTRACODING AND DECODING VIDEO DATA - A video system for coding a stream of video data that includes a stream of video frames divides each video frame into a matrix of a plurality of subblocks, wherein each subblock includes a plurality of pixels. The video system operates in accordance with nine prediction modes. Each prediction mode determines a prediction mode according to which a present subblock is to be coded. One of the nine prediction modes is selected to encode the present subblock, wherein the selected prediction mode provides for a minimum error value in the present subblock.11-25-2010
20110176608METHOD AND APPARATUS FOR DETERMINING INTRA PREDICTION MODE, AND METHOD AND APPARATUS FOR ENCODING/DECODING VIDEO USING SAME - Disclosed are a method and apparatus for determining an intra prediction mode, and for encoding/decoding video using the same. An apparatus for determining an intra prediction mode is provided, the apparatus comprising a calculator to calculate a variation of adjacent pixels to a current block; a threshold setter to set a threshold to evaluate the pixel variation; a comparator to compare between the variation and the threshold; a first prediction mode determination unit to determine a single predetermined prediction mode to be an optimal prediction mode if the variation is below the threshold; and a second prediction mode determination unit to determine a particular prediction mode from a plurality of prediction modes to be the optimal prediction mode through a rate-distortion optimization by performing intra predictions in the plurality of prediction modes if the variation is greater than or equal to the threshold.07-21-2011
20100118940ADAPTIVE REFERENCE PICTURE DATA GENERATION FOR INTRA PREDICTION - A device incorporates an H.264 compatible video encoder for providing compressed, or encoded, video data. The H.264 encoder comprises a buffer for storing previously coded macroblocks of a current picture being encoded; and a processor for generating adaptive reference picture data from the previously coded macroblocks of the current picture; wherein the adaptive reference picture data is for use in predicting uncoded macroblocks of the current picture.05-13-2010
20100266012DECODING AND PRESENTATION TIME STAMPS FOR MPEG-4 ADVANCED VIDEO CODING - A system, method, and apparatus for time stamping compressed video data is disclosed. A delay parameter is generated and can be encoded with the compressed video, representing the number of picture delay between the decoded sequence and the presented sequence. The presentation time stamp is associated with each of the pictures. The presentation time stamp is a function of the delay parameter and other parameters associated with picture associated therewith.10-21-2010
20100111178VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-06-2010
20100260260SCALABLE VIDEO CODING SUPPORTING PIXEL VALUE REFINEMENT SCALABILITY - A more efficient way of enabling scalability in terms of pixel value resolution is achieved by temporally predicting a first and a second representation of a video material separately to each other with the first representation being of a lower pixel value resolution than the second representation, with mapping the first prediction residual or a reconstructed version thereof from the first pixel value resolution to the second pixel value resolution dependent on the second prediction signal obtained from temporally predicting the second representation, and by coding a second prediction residual being of the second pixel value resolution as representing a deviation between a combination of the second and third prediction signals and the second representation.10-14-2010
20100098157 METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - A method of decoding a video signal is disclosed. The present invention includes obtaining IC (Illumination Compensation) difference information of a neighbor block of a current block, when information associated with illumination compensation for the current block is not available in a bitstream, deriving IC difference information of the current block using the IC difference information of the neighbor block, deriving an IC flag indicating whether illumination compensation is performed on the current block, based on the IC difference information of the current block, and performing the illumination compensation on the current block, based on the IC difference information of the current block and the IC flag.04-22-2010
20100098160VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-22-2010
20100098156WEIGHTED PREDICTION BASED ON VECTORIZED ENTROPY CODING - This disclosure describes methods that control the selection of predictive coding techniques for enhancement layer video blocks based on characteristics of vectorized entropy coding for such enhancement layer video blocks. In accordance with this disclosure, the predictive techniques used for predictive-based video coding of enhancement layer video blocks are dependent upon the vectorized entropy coding used for such enhancement layer the video blocks. For each coded unit, predictive coding techniques (e.g. weighted or non-weighted prediction) may be selected depending upon whether the vectorized entropy coding defines a single vector for the video blocks of that coded unit or multiple vectors for the video blocks of that coded unit.04-22-2010
20100098159VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-22-2010
20100098158VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-22-2010
20120033730RANDOM ACCESS POINT (RAP) FORMATION USING INTRA REFRESHING TECHNIQUE IN VIDEO CODING - A random access point can be generated in a stream of coded digital pictures containing a plurality of predictive coded frames in which one or more subsections of each frame are intra coded. A patch frame can be formed from intra-coded subsections in identified consecutive predictive-coded frames. The patch frame can be used as a synthetic random access point.02-09-2012
20090022221METHOD FOR VIDEO LAYERED CODING, DEVICE FOR CODING AND DECODING IN INTERLACED MODE - A video layered coding or decoding method in an interlaced mode, including: dividing a frame of a current layer into fields after interlacing; determining a field in the current layer at the same time point as a frame in an upper layer according to a corresponding relation on a time axis; and predicting the frame in the upper layer through the corresponding field at the same time point, so as to realize inter-layer predictive coding or decoding.01-22-2009
20100002766VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.01-07-2010
20110150086METHOD FOR DISPLAYING DECODED VIDEO BIT STREAMS - A method for improving display speed of decoding video bit streams obtains the video bit streams from a storage system of a computer by a decoder, and decodes the video bit streams in a display block of a memory of the computer to obtain decoded images by the decoder. The method further selects an image from the decoded images by the decoder, and updates a reference image stored in a buffer block of the memory with the selected image.06-23-2011
20090310675VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING PROGRAM, AND VIDEO DECODING PROGRAM - A video processing system is provided with video encoding apparatus 12-17-2009
20110150084SCALABLE VIDEO ENCODING AND DECODING METHOD USING SWITCHING PICTURES AND APPARATUS THEREOF - A conventional new video coding technology can provide a bitstream switching picture by encoding the bitstream switching picture into an I picture. However, an encoding efficiency is greatly reduced. As such, the new video coding technology does not provide an efficient bitstream switching function. Also, other advantages provided by a switching picture technology such as a random access, error durability, and a bitstream splicing are not provided. Provided is an apparatus for encoding a video bitstream including a base layer bitstream and an enhancement layer bitstream by encoding an enhancement layer picture of the enhancement layer bitstream, which is reproduced immediately after a base layer picture of the base layer bitstream is reproduced, into a non-switching pictures by interlayer prediction using a reference image generated by decoding a pre-encoded base layer picture or by motion prediction using another reference image generated by decoding a pre-encoded enhancement layer picture, and into a switching picture, which is decoded into the same image as the non-switching picture, by an interlayer prediction using the non-switching picture and a reference image generated by decoding a pre-encoded base layer picture, while the base layer picture is being reproduced.06-23-2011
20090022222METHOD AND DEVICE FOR MULTI-VIEW ENCODING/DECODING USING DISPARITY VECTOR - A method of obtaining a disparity vector and its encoding/decoding in the multi-view coding process is disclosed. The present invention includes essentially: determining a disparity vector between two views during the multi-view image coding, and computing a disparity vector between the other two views according to the disparity vector between the two views and the known relative location information between each of the views. Thereafter, the disparity vector is used for multi-view encoding/decoding. The present invention further makes use of the correlation between the disparity vector and depth information of the spatial vector on one hand, and on the other hand makes use of the direct relationship between the disparity vector and the location of each of the cameras. It is experimentally proved that the disparity vector between several views can be accurately computed during the multi-view coding, thereby improving the performance of multi-view coding.01-22-2009
20090022220METHOD AND APPARATUS FOR ENHANCED VIDEO CODING - Standard video compression techniques apply motion-compensated prediction combined with transform coding of the prediction error. In the context of prediction with fractional-pel motion vector resolution it was shown, that aliasing components contained in an image signal are limiting the prediction efficiency obtained by motion compensation. In order to consider aliasing, quantization and motion estimation errors, camera noise, etc., we analytically developed a two dimensional (2D) non-separable interpolation filter, which is independently calculated for each frame by minimizing the prediction error energy. For every fractional-pel position to be interpolated, an individual set of 2D filter coefficients is determined. Since transmitting filter coefficients as side information results in an additional bit rate, which is almost constant for different image resolutions and total bit rates, the loss in coding gain increases when total bit rates sink. Therefore, we developed an algorithm, which regards the non-separable two-dimensional filter as a polyphase filter. For each frame, predicting the interpolation filter impulse response through evaluation of the polyphase filter, we only have to encode the prediction error of the filter coefficients.01-22-2009
20080267288METHOD, APPARATUS, AND SYSTEM FOR ENHANCING ROBUSTNESS OF PREDICTIVE VIDEO CODECS USING A SIDE-CHANNEL BASED ON DISTRIBUTED SOURCE CODING TECHNIQUES - A method, apparatus, and system for providing distributed source coding techniques that improve data coding performance, such as video data coding, when channel errors or losses occur. Errors in the reconstruction of the data is eliminated or reduced by sending extra information. Correlation between a predicted sequence and an original sequence can be used to design codebooks and find the cosets required to represent the original image. This information may be sent over another channel, or a secondary channel.10-30-2008
20120201298Implicit Transform Unit Representation - In one embodiment, a method includes receiving a size of a coding unit (CU) for a block of video content. Information associated with a prediction unit (PU) type for a prediction unit of the coding unit is also received. The method then applies the size of the coding unit and the information associated with the prediction unit type to a function to determine a size of at least one transform unit for the prediction unit. The size of the at least one transform unit is outputted for use in a transform operation.08-09-2012
20110002384VIDEO ENHANCEMENT USING RECURSIVE BANDLETS - A wavelet transform is applied to successive images of a video sequence to obtain wavelet coefficients for each image, and directions of regularity are estimated in association with the wavelet coefficients. Recursive weights are also determined to be associated with the wavelet coefficients. An average multiscale bandlet coefficient associated with a wavelet coefficient for a current image is computed from this wavelet coefficient, the recursive weight associated therewith and a corresponding average multiscale bandlet coefficient computed for a previous image and associated with a wavelet coefficient offset according to the direction of regularity associated with the wavelet coefficient. The average multiscale bandlet coefficients can then be processed to produce an enhanced bandlet image to which an inverse wavelet transform is applied. The determination of a recursive weight associated with a wavelet coefficient for the current image comprises checking a condition between this wavelet coefficient and the corresponding average multiscale bandlet coefficient computed for the previous image, and updating a value of the recursive weight depending on the condition.01-06-2011
20080205519Displayport CE system control functionality - An improved method and apparatus is disclosed for communicating control information between components of an audio/video system. Processing and control logic is implemented to transfer a plurality of data streams on predetermined channels of a digital video interface. A first data stream contains video data received by a video interface receiver, where it is used to generate an image on a digital display. A second data stream contains control data, which is similarly received by the video interface receiver, and is used to control source devices coupled to the digital display.08-28-2008
20110164680METHOD OF EFFECTIVELY PREDICTING MULTI-LAYER BASED VIDEO FRAME, AND VIDEO CODING METHOD AND APPARATUS USING THE SAME - A method and apparatus are provided for effectively predicting a video frame that use all of the advantages of an intra mode and an intra BL mode in multi-layer structure based-video coding. The method includes reconstructing the intra block of a lower layer using the previously reconstructed first neighboring blocks of the intra block; subtracting the first neighboring blocks from previously stored the second neighboring blocks of an upper layer corresponding to the first neighboring blocks; creating a differential predicted block based on a predetermined intra prediction mode by performing intra prediction using virtual differential neighboring blocks that are created as a result of the subtraction; adding the differential predicted block and the reconstructed intra block; and subtracting a predicted block, which is created as a result of the addition, from a block of the upper layer corresponding to the intra block.07-07-2011
20130121411AUDIO OR VIDEO ENCODER, AUDIO OR VIDEO DECODER AND RELATED METHODS FOR PROCESSING MULTI-CHANNEL AUDIO OR VIDEO SIGNALS USING A VARIABLE PREDICTION DIRECTION - An encoder/decoder is based on a combination of two audio or video channels to obtain a first combination signal as a mid-signal and a residual signal derivable using a predicted side signal derived from the mid-signal. A decoder uses the prediction residual signal, the first combination signal, a prediction direction indicator and prediction information to derive decoded first channel and second channel signals. A real-to-imaginary transform can be applied for estimating the imaginary part of the spectrum of the first combination signal. The prediction signal used in the derivation of the prediction residual signal, the real-valued first combination signal is multiplied by a real portion of the complex prediction information and the estimated imaginary part of the first combination signal is multiplied by an imaginary portion of the complex prediction information.05-16-2013
20100284460VIDEO ENCODING WITH TEMPORALLY CONSTRAINED SPATIAL DEPENDENCY FOR LOCALIZED DECODING - This disclosure describes techniques for region-of-interest (ROI) encoding. In accordance with the techniques described herein, an encoding device may determine a temporal spatial dependency value for a candidate reference video block for inter-coding a current block in a video frame. The encoding device may compare the temporal spatial dependency value to a threshold value and select a coding mode for the current block based on the comparison. A decoding device may receive data defining a ROI as well as the temporal spatial dependency value and decode a video block in the ROI based at least in part on the temporal spatial dependency value. In this manner, the techniques of this disclosure may allow a video content viewer the ability to choose a ROI to watch.11-11-2010
20100284459APPARATUS FOR ENCODING AND DECODING IMAGE USING ADAPTIVE DCT COEFFICIENT SCANNING BASED ON PIXEL SIMILARITY AND METHOD THEREFOR - The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes: a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.11-11-2010
20100329336METHOD AND APPARATUS FOR ENCODING AND DECODING BASED ON INTER PREDICTION USING IMAGE INPAINTING - Provided are a method and apparatus for encoding and decoding based on inter prediction. In the method of encoding based on inter prediction, image inpainting is performed by searching for at least one reference picture by using pixels that are adjacent to the boundary between a current block and a previously encoded region of a current picture and are included in the previously encoded region, and the current block is encoded based on a predicted block obtained as the result of performing image inpainting. Accordingly, it is possible to precisely generate a predicted block, thereby improving the compression rate of image encoding.12-30-2010
20100329335VIDEO ENCODING AND DECODING APPARATUS - According to one embodiment, a video encoding apparatus includes a setting module to set a filter coefficient for use in filtering in a video decoding apparatus, and to set a rounding offset for controlling rounding of operation in the filtering, and an encoder to output the filter coefficient and information of the rounding offset as encoded data.12-30-2010
20100329334METHODS AND APPARATUS FOR IMPLICIT BLOCK SEGMENTATION IN VIDEO ENCODING AND DECODING - Methods and apparatus are provided for implicit block segmentation in video encoding and decoding. An apparatus includes an encoder for encoding at least a portion of a picture using a block segmentation process performed on a pixel difference of at least two predictors for the portion. The encoder implicitly signals block segmentation information for use by a decoder to decode the portion.12-30-2010
20110038415METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are a method and a apparatus for encoding a video, and a method and apparatus for decoding a video, in which neighboring pixels used to perform intra prediction on a current block to be encoded are filtered and intra prediction is performed by using the filtered neighboring pixels.02-17-2011
20110038414METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks.02-17-2011
20110038413METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed is a method of encoding a video, the method including: splitting a current picture into at least one maximum coding unit; determining a coded depth to output a final encoding result according to at least one split region obtained by splitting a region of the maximum coding unit according to depths, by encoding the at least one split region, based on a depth that deepens in proportion to the number of times the region of the maximum coding unit is split; and outputting image data constituting the final encoding result according to the at least one split region, and encoding information about the coded depth and a prediction mode, according to the at least one maximum coding unit.02-17-2011
20110038412METHOD AND APPARATUS FOR ENCODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE, AND METHOD AND APPARATUS FOR DECODING VIDEO IN CONSIDERATION OF SCANNING ORDER OF CODING UNITS HAVING HIERARCHICAL STRUCTURE - A method and apparatus for decoding a video and a method and apparatus for encoding a video are provided. The method for decoding the video includes: receiving and parsing a bitstream of an encoded video; extracting, from the bitstream, encoded image data of a current picture of the encoded video assigned to a maximum coding unit, and information about a coded depth and an encoding mode according to the maximum coding unit; and decoding the encoded image data for the maximum coding unit based on the information about the coded depth and the encoding mode for the maximum coding unit, in consideration of a raster scanning order for the maximum coding unit and a zigzag scanning order for coding units of the maximum coding unit according to depths.02-17-2011
20110080951Image Encoding Method, Image Decoding Method, Image Encoding Apparatus, Image Decoding Apparatus, and Program - A technique for improving a compression rate without needing new determination information (encoding flag information) is provided. For compression of each area to be encoded, based on a skip mode (a process which does not compress information of the area to be encoded, but copies previous information of the area to be encoded), it is determined whether an existing predicted image generated by an existing encoding standard is used, or an interpolation predicted image newly generated by executing move searching between decoded images is used.04-07-2011
20120177114ADAPTIVELY PERFORMING SMOOTHING OPERATIONS - During a video coding process, a prediction block is generated for a CU. The CU has two or more prediction units. A computing device determines, based on sizes of one or more of the prediction units, whether to perform a smoothing operation on samples in a transition zone of the prediction block. The transition zone is located at a boundary between samples of the prediction block associated with different prediction units. If the computing device makes the determination to perform the smoothing operation, the smoothing operation is performed to smooth samples of the prediction block in the transition zone.07-12-2012
20100118948METHOD AND APPARATUS FOR VIDEO PROCESSING USING MACROBLOCK MODE REFINEMENT - Apparatus and methods for processing (e.g., transrating) one or more compressed video bitstreams including mode refinement analysis. In one embodiment, a method of transrating a digital video picture having a plurality of input macroblocks, each input macroblock having at least first and second attributes (e.g., slice type, encoding mode, and a “skipped” mode) is disclosed. In one variant, the method comprises generating an output macroblock corresponding to each input macroblock, with each of the output macroblocks having the first and second attributes. For each output macroblock having a first value for the first attribute (e.g., slice type), the second attribute (e.g., encoding mode) is decided at least in part by evaluating one or more error criteria, the error criteria being responsive to the second attribute of a corresponding input macroblock.05-13-2010
20100118943METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE - An image encoding apparatus includes a multidirectional predicting unit configured to predict a plurality of pixel blocks by using an encoded pixel as a reference pixel according to a plurality of prediction modes having different prediction directions to generate a plurality of first prediction signals corresponding to the pixel blocks obtained by dividing a frame of an input image signal a setting unit configured to set a weighting factor depending on the prediction directions of the plurality of prediction modes and a spatial distance between a prediction pixel in the pixel block and the reference pixel, a weighted average unit configured to calculate a weighted average of the plurality of first prediction signals according to the weighting factor to generate one second prediction signal corresponding to the pixel blocks, and an encoding unit configured to encode a prediction residual error signal representing a difference between an image signal of the pixel block and at least the second prediction signal to generate encoded data.05-13-2010
20110080950AUTOMATIC SELECTION OF ENCODING PARAMETERS TO CONTROL LENGTH OF TIME TO ENCODE AND SEND DATA OVER NETWORK - Data processing including encoding and sending is disclosed, which includes: encoding data using a selected one of a plurality of parameter sets each of which has at least one encoding parameter; calculating a length of an assigned time not exceeding a time limit for an original data set to be sent, per each data sub-set; calculating an estimate of an individual processing time T04-07-2011
20110096833SOFTWARE VIDEO DECODER DISPLAY BUFFER UNDERFLOW PREDICTION AND RECOVERY - Prediction of and recovery from display buffer underflow are described. A first time delay for displaying a first group of one or more frames of a video picture stream located in an output frame buffer is calculated. A second time delay for displaying a second group of one or more frames in the picture stream is calculated. The second group directly follows the first group in the output buffer and is currently decoded by a decoder, but not yet deposited into the output frame buffer. A third time delay for decoding a third group of one or more frames in the picture stream is calculated. The third group directly follows the second group and is not yet decoded by the decoder. The decoder switches to or remains in a fast decoding mode if the sum of the first and second time delays is less than the third time delay.04-28-2011
20110096834METHOD AND APPARATUS FOR ENCODING RESIDUAL BLOCK, AND METHOD AND APPARATUS FOR DECODING RESIDUAL BLOCK - Methods and apparatuses for encoding and decoding a residual block are provided. The method of encoding the residual block includes: generating a prediction block of a current block; generating a residual block based on a difference between the prediction block and the current block; generating a transformation residual block by transforming the residual block to a frequency domain; splitting the transformation residual block into frequency band units; and encoding effective coefficient flags indicating frequency band units, of the frequency band units, in which nonzero effective transformation coefficients exist.04-28-2011
20110096835CODING METHOD, ERROR DETECTING METHOD, DECODING METHOD, CODING APPARATUS, ERROR DETECTING APPARATUS, AND DECODING APPARATUS - Provided is a coding method that allows reduction of a code amount necessary for coding reference indexes and improvement in the coding efficiency. The coding method according to the present invention is a method of coding a random accessible picture using inter-view reference, and includes: writing, into a slice header of the random accessible picture, a reference list modification syntax for modifying a reference picture list so that an inter-view reference picture is placed at the beginning of the reference picture list (S04-28-2011
20100215100Method and Apparatus for Decoding/Encoding a Video Signal - The present invention provides a video signal decoding method including the steps of checking an encoding scheme of the video signal, reading attribute information for the video signal, and decoding an inter-view picture group existing on a same time zone using the attribute information.08-26-2010
20100215101METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - A method of processing a video signal is disclosed. The present invention includes extracting an overlapping window coefficient from a video signal bitstream, applying a window to at least one reference area within a reference picture using the overlapping window coefficient, obtaining a reference block by overlapping the window applied at least one reference area multiply, and obtaining a predictor of a current block using the reference block.08-26-2010
20100254457METHOD OF IMPLEMENTING INTRA PREDICTION COMPUTATION APPLIED TO H.264 DIGITAL VIDEO CODING AND DEVICE - The present invention provides a method of implementing an intra prediction computation applied to the H.264 digital video coding and a device. The method according to present invention of implementing the intra prediction computation applied to the H.264 video coding comprises selecting an image block to be intra-predicted and extracting the neighboring pixel values of said block; determining the prediction mode of said block, and perform first adding operation on said neighboring pixel values when the prediction mode is one of Diagonal_Down_Left, Diagonal_Down_Right, Vertical_Right, Horizontal_Down, Vertical_Left, and Horizontal_Up; performing first shifting operation and second adding operation on the result of first adding operation respectively; performing second shifting operation on the result of second adding operation; selecting a corresponding value to output from the results of first and second shifting operation according to said prediction mode and size of block. The method and circuit device according to present invention will decrease most of the repeated calculations and improve the efficiency without greatly increasing the required chip real estate area.10-07-2010
20100166067Method for Prediction Coding Using Scalable Video Codec - Provided is a method for prediction coding using scalable video codec, which can support various chrominance spaces. A method for prediction coding includes setting a target layer based on corresponding device information on a specific image service request, performing a chrominance space conversion on an image signal of a base layer using a chrominance space conversion equation preset in a scalable video codec selectively according to whether a chrominance space conversion is necessary in prediction coding between the base layer and the target layer, and performing inter-layer prediction coding through an additional signal conversion based on necessary any one of spatial scalability, chroma-format scalability and bit-depth scalability.07-01-2010
20100080291MOVING PICTURE ENCODING APPARATUS AND MOVING PICTURE DECODING APPARATUS - A prediction control unit determines whether to use intra-prediction method or a method of prediction based on reduced image in which a predicted image is generated using a locally decoded image of a block as an object of coding that has been coded and reduced, according to the amount of high-frequency component contained in the block as the object of coding. When use of intra-prediction method is determined, locally decoded images of previously-encoded neighboring blocks stored in a frame memory are down-sampled by a down-sampling unit and subjected to intra-prediction by an intra-prediction unit, and coding is done using the prediction data. When use of prediction method based of reduced image is determined, inter-layer prediction is done using neighboring images obtained by reading locally decoded images resulting from a process of a lower layer from the frame memory, and coding is done using the prediction data.04-01-2010
20100080292Video Rate Control for Video Coding Standards - A method and device for improving rate controlling in video coding of sequences including a series of Inter frames separated by Intra frames, when a decoding delay is considered, comprise for each Inter frame of the series: computing a target frame size, computing a maximum buffer level related to a position of each Inter frame relative to a previous Intra frame and an upcoming Intra frame, and optimizing a transmission buffer level in response to the computed target frame size and the computed maximum buffer level.04-01-2010
20100195729VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.08-05-2010
20100195728VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.08-05-2010
20100195727VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.08-05-2010
20100195724VIDEO COMPRESSION ENCODING/DECOMPRESSION DEVICE, VIDEO COMPRESSION ENCODING/DECOMPRESSION PROGRAM AND VIDEO GENERATION/OUTPUT DEVICE - When a periodic pattern is not included in image data 08-05-2010
20100195726VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.08-05-2010
20100195725VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.08-05-2010
20100195723MOVING IMAGE ENCODER AND MOVING IMAGE DECODER - The encoding efficiency when a plurality of reference blocks are used to generate prediction blocks for encoding is improved. A moving image encoder performs inter-picture predictive encoding to encode a difference value from a block to be encoded by generating a prediction image of the block to be encoded by using a plurality of reference images extracted from an encoded frame. The moving image encoder comprises a prediction method candidate generating portion 08-05-2010
20100067575DECODING METHOD, DECORDER AND DECODING APPARATUS - A decoding method generates a rectangular residual image by performing an inverse quantization and inverse frequency conversion processes based on coefficient data, a rectangular predicted image by reading a reference image based on motion vector data, and a decoded image by adding the residual image and the predicted image. The predicted images with respect to at least two or more rectangular regions are stored when generating the rectangular predicted image, and a predicted image ready signal notifies that the predicted image with respect to the at least two or more rectangular regions has been generated. The timings to store the coefficient data and the motion vector data are controlled in response to the predicted image ready signal.03-18-2010
20100067576Method and Apparatus to Prioritize Video Information During Coding and Decoding - A method and apparatus prioritizing video information during coding and decoding. Video information is received and an element of the video information, such as a visual object, video object layer, video object plane or keyregion, is identified. A priority is assigned to the identified element and the video information is encoded into a bitstream, such as a visual bitstream encoded using the MPEG-4 standard, including an indication of the priority of the element. The priority information can then be used when decoding the bitstream to reconstruct the video information03-18-2010
20120207216VIDEO AND IMAGE ENCODING/DECODING SYSTEM BASED ON SPATIAL DOMAIN PREDICTION - A video/image encoding/decoding system based on spatial prediction, in which at least one spatial prediciton mode is used to predict for encoding or decoding. At least one prediction mode acts on at least one pixel in the region to be encoded or decoded to generate the predictive values, using a prediction filter based on one or more reference pixels; furthermore, at least one of the spatial prediction modes has one or a combination of the following characteristics: the prediction filter which is content adaptively calculated through maximizing or minimizing the optimization objective in a specific region is used to generate the predictive values. The information of at least one spatial prediction filter of a specific spatial prediction mode is coded and written into the bit stream. The encoding/decoding system of this disclosure can better capture the dynamics of different video and image contents with improved precision of spatial prediction, and better coding performance is achieved.08-16-2012
20090310676PROCESSING MULTIVIEW VIDEO - Decoding a multiview video signal comprises receiving a bitstream comprising the multiview video signal encoded according to dependency relationships between respective views, and view-dependency information representing the dependency relationships in a two-dimensional data structure; extracting the two-dimensional data structure and determining the dependency relationships from the extracted data structure; and decoding the multiview video signal according to the determined dependency relationships.12-17-2009
20110051812Video Transmitting Apparatus, Video Receiving Apparatus, Video Transmitting Method, and Video Receiving Method - A video transmitting apparatus includes: an error receiver that receives, from a video receiving apparatus for receiving a bit stream resulting from encoding of video data including pictures, error information indicating that an error is detected; an encoding-mode selector that selects a propagation-prevention encoding mode as an encoding mode when the error receiver receives the error information; and an encoder that encodes the video data in accordance with the selected encoding mode. In the propagation-prevention encoding mode, intra coding is executed on a forced intra block; a search range is set for a reference encoding unit so as not to include correspondent pixels from a boundary line serving as a boundary between the forced intra block and another block, the correspondent pixels corresponding to the number of adjacent pixels; and a restriction is set on deblocking-filter processing through a change in deblocking-filter setting information.03-03-2011
20110051811PARALLEL DIGITAL PICTURE ENCODING - Apparatus and Method for parallel digital picture encoding are disclosed. A digital picture is partitioned into two or more vertical sections. An encoder unit is selected to serve as a master and one or more encoder units are selected to serve as slaves. The total number of encoder units used equals the number of vertical sections. A mode search is performed on the two or more vertical sections on a row-by-row basis. Entropy coding is performed on the two or more vertical sections on a row-by-row basis. The entropy coding of each vertical section is performed in parallel such that each encoder unit performs entropy coding on its respective vertical section. De-blocking is performed on the two or more vertical sections in parallel on a row-by-row basis.03-03-2011
20100027648VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027629VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20110188574DEBLOCKING METHOD, DEBLOCKING APPARATUS, DEBLOCKING PROGRAM AND COMPUTER-READABLE RECORDING MEDIUM RECORDED WITH THE PROGRAM - A direction is detected for each block in which a pixel value is changed which is represented by an edge that indicates a direction of change in pixel value in each block, a direction in which a deblocking filter is to be applied to a block boundary is determined based on a direction of an edge detected for a block to be processed which includes the block boundary subject to deblocking and on a direction of an edge detected for a block contacting the block to be processed, and the deblocking filter is applied to the block boundary in accordance with the determined direction.08-04-2011
20110188572METHOD AND APPARATUS FOR ENCODING VIDEO BASED ON SCANNING ORDER OF HIERARCHICAL DATA UNITS, AND METHOD AND APPARATUS FOR DECODING VIDEO BASED ON SCANNING ORDER OF HIERARCHICAL DATA UNITS - A video decoding method and apparatus and a video encoding method and apparatus based on a scanning order of hierarchical data units are provided. The decoding method includes: receiving and parsing a bitstream of an encoded video; extracting from the bitstream information about a size of a maximum coding unit for decoding a picture of the encoded video, and encoding information about a coded depth and an encoding mode for coding units of the picture, wherein the size of the maximum coding unit is a maximum size of a coding unit which is a data unit for decoding the picture; and determining a hierarchical structure of the maximum coding unit and the coding units into which the picture is divided according to depths, and decoding the picture based on the coding units, by using the information about the size of the maximum coding unit and the encoding information about the coded depth and the encoded mode.08-04-2011
20110188569SYSTEM AND METHOD FOR RELATIVE STORAGE OF VIDEO DATA - System and method for compressing and decompressing of differentially encoded video streams. I-frames of the encoded video stream may be relatively compressed and decompressed, thereby reducing video data size of an already encoded video stream. Compression and decompression may be lossless processes and may typically require relatively low processing power and small memory sizes.08-04-2011
20110188571RECURSIVE ADAPTIVE INTERPOLATION FILTERS (RAIF) - Adaptive interpolation filters which are recursively updated based on previously reconstructed images, and which can differ within a single frame as they adapt to spatial changes. An initial set of filters is known within a coding system, including both encoder and decoder. Fractional-pel motion estimation of macroblock is generalized by communicating integer-pel motion vectors and an index to a selected prediction interpolation filter. Prediction filters are updated based on local correlation data comprising auto-correlation data, and/or cross-correlation data.08-04-2011
20110188570MOVING IMAGE PROCESSING METHOD, PROGRAM AND APPARATUS - It is an object of the present invention to provide a method, a program, and an apparatus for processing a moving image, allowing efficient and smooth decoding in a simple configuration without heavily depending on the functions of an OS. Herein disclosed is a method for processing a moving image using a plurality of processing units, comprising: a step of dividing a frame of the moving image into a plurality of slices, where a number of the plurality of slices is not a multiple of a number of the plurality of processing units; a processing step, assigned to each of the plurality of slices, for processing each of the plurality of slices; and a switching step for executing slice switching, which switches between the slices to be processed, in the processing step. The method according to the present invention, not limited to the processing of moving images, allows efficient and smooth decoding in a simple configuration, even if the number of slices is not an integer multiple of the number of the processing units, without heavily depending on the functions of an OS.08-04-2011
20090175337Method of decoding a macroblock based on a macroblock level of the macroblock - In one embodiment, the method includes obtaining a first reference frame picture list and a second reference frame picture list including multiple reference frame pictures respectively. A reference frame picture index is determined based on display order information for the multiple reference frame pictures. The method further includes obtaining first motion vector information and second motion vector information for the macroblock and obtaining a first reference field picture index and a second reference field picture index associated with the macroblock. A first reference frame picture and a second reference frame picture are determined. The method further includes selecting first and second reference field pictures for the macroblock. The macroblock is decoded based on the first and second motion vector information and the selected first and second reference field pictures.07-09-2009
20090175336VIDEO CODING OF FILTER COEFFICIENTS BASED ON HORIZONTAL AND VERTICAL SYMMETRY - This disclosure recognizes and exploits the fact that some of the filter coefficients defined at the encoder may possess symmetry relative to other filter coefficients. Accordingly, this disclosure describes techniques in which a first set of the filter coefficients are used to predictively encode a second set of the filter coefficients, thereby exploiting any symmetry between filter coefficients. Rather than communicate all of the filter coefficients to the decoding device, the encoding device may communicate the first set of filter coefficients and difference values associated with the second set of filter coefficients. Using this information, the decoder may be able to reconstruct all of the filter coefficients. In some cases, if exact symmetry is imposed, the need to send the difference values may be eliminated and the decoder may be able to derive the second set of filter coefficients from the first set of filter coefficients.07-09-2009
20090175335Digital Watermarking Method - The invention relates to a method of watermarking a binary stream resulting from the encoding of a set of coefficients comprising at least one coefficient encoded by predictive coding, called predictively coded coefficient. The method comprises the steps of: 07-09-2009
20090175333METHOD AND APPARATUS FOR HIGHLY SCALABLE INTRAFRAME VIDEO CODING - An apparatus and method is provided for highly scalable intraframe video coding. The conventional macroblock DCT tools are integrated with the subband filter banks for the improved efficiency of scalable compression. The enhancement layers are represented in a subband domain and coded by an inter-layer frame texture coder utilizing inter-layer prediction signal formed by the decoded previous layer. Each quality enhancement layer is additionally scalable in resolution.07-09-2009
20110188573Method and Device for Processing a Video Sequence - The invention concerns a method and a device (08-04-2011
20100027647VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027645VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027654METHOD AND APPARATUS FOR DECODING/ENCODING A VIDEO SIGNAL - The method includes the steps of receiving the multi-view video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture; obtaining random access flag for inter-view prediction, the random access flag indicating whether a type of picture is the random access picture; obtaining initialization information of a reference picture list for the random access slice based on the random access flag, the initialization information representing a reference relation between a plurality of views with view number information and view identification information; initializing the reference picture list of the random access slice using the view number information and the view identification information; determining a prediction value of a macroblock in the random access picture based on the initialized reference picture list; and decoding the macroblock using the prediction value, wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views.02-04-2010
20100027653METHOD AND APPARATUS FOR DECODING/ENCODING A VIDEO SIGNAL - The method includes the steps of receiving the multi-view video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture; obtaining random access flag for inter-view prediction, the random access flag indicating whether a type of picture is the random access picture; obtaining initialization information of a reference picture list for the random access slice based on the random access flag, the initialization information representing a reference relation between a plurality of views with view number information and view identification information; initializing the reference picture list of the random access slice using the view number information and the view identification information; determining a prediction value of a macroblock in the random access picture based on the initialized reference picture list; and decoding the macroblock using the prediction value, wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views.02-04-2010
20100027652VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027651VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027650VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027649VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027646VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027644VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027643VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027642VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027641VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027640VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027639VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027634VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027633VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027632VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027631VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100027630VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.02-04-2010
20100020873MOVING PICTURE CODING METHOD, AND MOVING PICTURE DECODING METHOD - A moving picture coding apparatus (01-28-2010
20100020872INTRA PREDICTION ENCODING CONTROL METHOD AND APPARATUS, PROGRAM THEREFOR, AND STORAGE MEDIUM WHICH STORES THE PROGRAM - An intra prediction encoding control method used in intra prediction encoding having a plurality of prediction modes and prediction block sizes, wherein the prediction mode and the prediction block size each can be switched when encoding is performed. The method includes a step of computing a flatness degree index which indicates a degree of flatness of a target area for encoding; a step of determining a prediction block size used in intra prediction encoding of the target area, in accordance with the computed flatness degree index; and a step of selecting a prediction mode used in the intra prediction encoding of the target area, for the determined prediction block size.01-28-2010
20100020870Method and Apparatus for Decoding/Encoding a Video Signal - The present invention provides a method of decoding a video signal. The method includes the steps of obtaining identification information indicating an assignment method of a reference index from the video signal, reordering reference pictures for inter-view prediction according to the identification information, and decoding the video signal using the reordered reference pictures, wherein the reference index includes view information for identifying a view of the reference picture.01-28-2010
20110216827Method and apparatus for efficient encoding of multi-view coded video data - A method and apparatus for efficient encoding of multi-view coded video data is provided. The apparatus includes one or more encoders (09-08-2011
20110216829ENABLING DELTA COMPRESSION AND MODIFICATION OF MOTION ESTIMATION AND METADATA FOR RENDERING IMAGES TO A REMOTE DISPLAY - Delta compression may be achieved by processing video data for wireless transmission in a manner which reduces or avoids motion estimation by a compression process. Video data and corresponding metadata may be captured at a composition engine. Frame buffer updates may be created from the data and metadata. The frame buffer updates may include data relating to video macroblocks including pixel data and header information. The frame buffer updates may include pixel reference data, motion vectors, macroblock type, and other data to recreate a video image. The macroblock data and header information may be translated into a format recognizable to a compression algorithm (such as MPEG-2) then encoded and wirelessly transmitted.09-08-2011
20110216828I-FRAME DE-FLICKERING FOR GOP-PARALLEL MULTI-THREAD VICEO ENCODING - A method of encoding video is presented in which multiple groups of pictures (GOPs) are formed and encoded in parallel threads. Each encoded GOP has an initial I-frame followed by a series of P-frames. Each I-frame is deflicker coded with a first derived no flicker reference from the nearest coded frame of a preceding GOP and, the last P-frame in the series of the preceding GOP is deflicker coded with a second derived no flicker reference from the deflicker coded I-frame.09-08-2011
20120307897VIDEO ENCODER, VIDEO DECODER, METHOD FOR VIDEO ENCODING AND METHOD FOR VIDEO DECODING, SEPARATELY FOR EACH COLOUR PLANE - High-fidelity video coding nowadays tends to adopt the RGB coding for directly reducing RGB inter-color redundancy without color space conversion. A known method uses a blockbased inter-colour compensation algorithm for removing inter-colour redundancy on RGB colour planes by defining the correlation between colour planes within each coding block as a linear model of slope and offset parameters, codes the base plane block and then predicts the other two colour blocks from the base plane block. However, for most coding blocks the texture within a component block varies quite much. A new method for improved video coding uses adaptive segmentation of the base colour component block, corresponding segmentation of the other colour component blocks and individual slope and offset parameters for predicting each segment.12-06-2012
20120307896MOVING PICTURE CODING METHOD, MOVING PICTURE DECODING METHOD, AND APPARATUSES OF THE SAME - A moving picture coding method includes partitioning a picture into blocks each of which includes pixels, selecting a scanning scheme from among plural scanning schemes, scanning the blocks according to the selected scanning scheme, and coding the blocks in an order in which the blocks are scanned. In the partitioning, the picture is partitioned into rows and columns of macroblocks each of which is partitioned into the blocks. The plural scanning schemes include a first scanning scheme for scanning the blocks in the macroblock per row of blocks.12-06-2012
20120307894INTRA PREDICTION MODE CODING WITH DIRECTIONAL PARTITIONS - A video coder can determine a most probable mode for a block of video data using non-square partitions based on the direction of the non-square partitions. When the direction of the non-square partitions is vertical, an intra prediction mode of a left-neighboring block can be selected as the most probable intra prediction mode, and when the direction of the non-square partitions is horizontal, an intra prediction mode of an above-neighboring block can be selected as the most probable intra prediction mode.12-06-2012
20120307893FAST COMPUTING OF DISCRETE COSINE AND SINE TRANSFORMS OF TYPES VI AND VII - This disclosure presents techniques for implementing a fast algorithm for implementing odd-type DCTs and DSTs. The techniques include the computation of an odd-type transform on any real-valued sequence of data (e.g., residual values in a video coding process or a block of pixel values of an image coding process) by mapping the odd-type transform to a discrete Fourier transform (DFT). The techniques include a mapping between the real-valued data sequence to an intermediate sequence to be used as an input to a DFT. Using this intermediate sequence, an odd-type transform may be achieved by calculating a DFT of odd size. Fast algorithms for a DFT may be then be used, and as such, the odd-type transform may be calculated in a fast manner12-06-2012
20090257493INTERPOLATION FILTER SUPPORT FOR SUB-PIXEL RESOLUTION IN VIDEO CODING - This disclosure describes filtering techniques applied by an encoder and a decoder during the prediction stage of a video encoding and/or decoding process. The filtering techniques may enhance the accuracy of predictive data used during fractional interpolation, and may improve predictive data of integer blocks of pixels. There are several aspects to this disclosure, including a useful twelve-pixel filter support that may be used for interpolation, techniques that use coefficient symmetry and pixel symmetry to reduce the amount of data needed to be sent between an encoder and a decoder to configure the filter support for interpolation, and techniques for filtering data at integer pixel locations in a manner that is similar to sub-pixel interpolation. Other aspects of this disclosure concern techniques for encoding information in the bitstream to convey the type of filter used, and possibly the filter coefficients used. Predictive coding of filter coefficients is also described.10-15-2009
20090304078VARIABLE LENGTH DECODER AND ANIMATION DECODER THEREWITH - The variable length decoder has a memory device including a plurality of lookup tables, and sequentially decodes codewords of variable-length codes using the memory device. The decoded values corresponding to the codewords and control information pieces are stored in the lookup tables. In decoding one codeword, one lookup table is selected from among the plurality of lookup tables. In the decode, one decoded value corresponding to the one codeword, and a control information piece for selecting a next lookup table depending on the decoded value and used for a next decode are produced from the selected lookup table in response to the one codeword in parallel.12-10-2009
20100135388SINGLE LOOP DECODING OF MULTI-VIEW CODED VIDEO ( amended - There are provided methods and apparatus at an encoder and decoder for supporting single loop decoding of multi-view coded video. An apparatus includes an encoder for encoding multi-view video content to enable single loop decoding of the multi-view video content when the multi-view video content is encoded using inter-view prediction. Similarly, a method is also described for encoding multi-view video content to support single loop decoding of the multi-view video content when the multi-view video content is encoded using inter-view prediction. Corresponding decoder apparatus and method are also described.06-03-2010
20110305279Tertiary Content Addressable Memory Based Motion Estimator - Presented herein are Tertiary Content Addressable Memory based motion estimator(s). In one embodiment, there is presented a method for encoding a picture. The method comprises addressing a first memory with one or more data words for a first prediction block, and addressing a second memory with one or more data words for a second prediction block while addressing the first memory.12-15-2011
20110305278Method of accessing a spatio-temporal part of a video sequence of images - The invention concerns a method and a device for accessing a spatio-temporal part of a video sequence of images compressed using a coding format implementing a prediction.12-15-2011
20120039392METHOD OF CODING A VIDEO SIGNAL - The invention relates to methods and apparatuses for encoding and decoding of a video sequence. In connection with encoding/decoding a video sequence it is desirable to increase the video quality without having to increase the bit-rate for the encoded video too much, thereby still providing a bit-efficient representation of the video. If multiple descriptions of the video sequence is used the invention improves the video quality without any increase of the bit-rate. According to the invention, this is achieved by using two or more coding units for encoding the same video sequence, wherein the encoding units perform their encoding operations displaced in time in relation to each other. Correspondingly, two or more decoding units are used for decoding the same video sequence, wherein the decoding units perform their decoding operations displaced in time in relation to each other.02-16-2012
20120099646ADAPTIVE SCANNING OF TRANSFORM COEFFICIENTS FOR VIDEO CODING - In an example, an apparatus for decoding video data includes a video decoder that is configured to determine a number of transform coefficients associated with a block of video data, and to determine whether the number of transform coefficients exceeds a predetermined threshold. The video decoder is also configured to identify a scan order when the number of transform coefficients exceeds the predetermined threshold, wherein the scan order indicates an order in which the transform coefficients have been serialized from a two-dimensional array to a one-dimensional array, and to apply the scan order to inverse scan the number of transform coefficients associated with a block of video data.04-26-2012
20100195722IMAGE PREDICTION ENCODING DEVICE, IMAGE PREDICTION DECODING DEVICE, IMAGE PREDICTION ENCODING METHOD, IMAGE PREDICTION DECODING METHOD, IMAGE PREDICTION ENCODING PROGRAM, AND IMAGE PREDICTION DECODING PROGRAM - An object is to efficiently depress mode information for identification of a prediction method even if there are a lot of prediction methods provided as to methods of generating intra-frame prediction signals in a pixel domain. An image prediction encoding device 08-05-2010
20120099648Apparatus and Method for Decoding Picture Data - A coding apparatus for hierarchically (layering) coding top field data and bottom field data divided from each of a plurality of picture data composing a moving picture image has a first coding unit configured to encode one field data between two field data of the top field data and the bottom field data divided from the picture data, a conversion unit configured to interpolate first predicted image data generated by the first coding unit encoding above one field data and generate a second predicted image data of a scanning position of the other field data between the two field data, and a second coding unit configured to encode the other field data between the two field data based on the second predicted image data generated by the conversion unit.04-26-2012
20100124276METHOD AND APPARATUS FOR DETECTING VIDEO FIELD SEQUENCE - A method and apparatus for detecting a video field sequence and a video processing system are provided. The method includes: calculating a difference D05-20-2010
20120063512VIDEO CODING AND DECODING METHOD USING WEIGHTED PREDICTION AND APPARATUS FOR THE SAME - A video coding and decoding method using a weighted prediction and an apparatus for the same are provided. The video coding method includes generating a predicted image for a present block; generating a weighted prediction factor which is a scaling factor of the predicted image that minimizes the difference between the present block and the predicted image; generating a weighted prediction image by multiplying the predicted image by the weighted prediction factor; and coding a residual signal generated by subtracting the weighted prediction image from the present block.03-15-2012
20110317761IMAGE CODING APPARATUS AND IMAGE CODING METHOD - There is provided an image coding apparatus for outputting an image stream in which random access and easy editing are possible without reducing encoding efficiency. The image coding apparatus sets, in the image stream, a picture in which the random access is possible based on camera control data or correlation between the images.12-29-2011
20110158318ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD - Continuous reproduction can be made possible. An encoding apparatus for executing an encoding process with an encoding system capable of at least B-pictures as pictures to be prediction-encoded comprises a timing calculation means for, anticipating that a plurality of encoded information created by performing the encoding process will be sequentially decoded on a decoding side, calculating output timing for results of decoding the encoded information, and a timing notification means for notifying the decoding side of the output timing calculated by the timing calculation means before a result of decoding corresponding encoded information is obtained.06-30-2011
20110158317METHOD OF REDUCING COMPUTATIONS IN INTRA-PREDICTION AND MODE DECISION PROCESSES IN A DIGITAL VIDEO ENCODER - A method of improving the computation speed of the sum of absolute transformed distances (SATD) for different intra-prediction modes is described. Determining the SATD quicker provides the benefits of better coding performance without suffering the drawbacks of longer computation times. The method of reducing intra-prediction and mode decision processes in a video encoder, implements Hadamard transforms with improvements. Hadamard transforms are performed on an original block and predicted blocks and calculations are only performed where coefficients are non-zero thus skipping the coefficients that are zero. Using such an approach, the calculations required for the Vertical Prediction, Horizontal Prediction and DC Prediction are reduced significantly. Thus, the best intra-prediction mode is able to be determined very efficiently.06-30-2011
20110158316PICTURE CODING APPARATUS, PICTURE DECODING APPARATUS AND THE METHODS - A weighting factor mode determination unit determines whether to code an interlaced picture in a field mode or a frame mode, based on a value of a flag “AFF” indicating whether or not to switch between the field mode and the frame mode on a block-by-block basis and notifies switches and a multiplexing unit of the determined mode. The switches select either the field mode or the frame mode according to the notified mode. A field weighting factor coding unit or a frame weighting factor coding unit performs respectively the coding of respective weighting factors when the respective modes are selected.06-30-2011
20110090960Rate Control Model Adaptation Based on Slice Dependencies for Video Coding - Statistics for estimating quantization factors of a coding-unit type (e.g., B-coded or I-coded) pictures are determined from other, possibly different (e.g., P-coded) pictures, or previously coded coding-units. Bit rate and quality relationships between such coding-unit types may be used with the quantization parameters. Estimating bit rate and quality relationships between coding-unit types enables accurate rate control for pictures regardless of their coding-unit type. Bit rate and quality relationships between coding-unit types can be used with multiple rate control models to increase compression. Rate control parameters may be adjusted with statistics generated by a motion estimation and compensation framework. Rate control performance may be controlled in transcoding compressed bit streams. 04-21-2011
20110090959BIT-DEPTH SCALABILITY - To increase efficiency of a bit-depth scalable data-stream an inter-layer prediction is obtained by mapping samples of the representation of the picture or video source data with a first picture sample bit-depth from a first dynamic range corresponding to the first picture sample bit-depth to a second dynamic range greater than the first dynamic range and corresponding to a second picture sample bit-depth being higher than the first picture sample bit-depth by use of one or more global mapping functions being constant within the picture or video source data or varying at a first granularity, and a local mapping function locally modifying the one or more global mapping functions and varying at a second granularity smaller than the first granularity, with forming the quality-scalable data-stream based on the local mapping function such that the local mapping function is derivable from the quality-scalable data-stream.04-21-2011
20110090958NETWORK ABSTRACTION LAYER (NAL)-AWARE MULTIPLEXER WITH FEEDBACK - Advanced multiplexing methods and apparatus that are especially useful in multiplexing variable bit rate input video streams onto a fixed bandwidth output stream with minimum effect on video quality are described. A multiplexer provides feedback to a stagger transmitter to help it maintain its output bit rate. In addition, the stagger transmitter parses Network Abstraction Layers (NALs) from the given streams and makes decisions on which NALs to forward to the MUX.04-21-2011
20110090957VIDEO CODEC METHOD, VIDEO ENCODING DEVICE AND VIDEO DECODING DEVICE USING THE SAME - A video codec method synchronizes long term reference frames in a video encoding device and a video decoding device of a video communication system. The video encoding device encodes video frames to code streams in an inter-prediction mode and set the corresponding reference frames to non-committed long term reference frames. The video decoding device decodes the code streams using the corresponding reference frames, then transmits an acknowledgement of the non-committed long term reference frames to the video encoding device. The video encoding device sets the non-committed long term reference frames to committed long term reference frames, and encodes succeeding video frames in the inter-prediction mode using the committed long term reference frames.04-21-2011
20110090956COMPRESSION METHOD USING ADAPTIVE FIELD DATA SELECTION - A compression method using adaptive field data selection is able to compress video or other data while retaining quality. By determining if pixels in a field are able to be predicted, the method is able to retain the information that is not able to be predicted and predict the other information. The method enables significant compression of the data which allows larger data such as high definition videos to be compressed and effectively used.04-21-2011
20110317760SIGNALING VIDEO SAMPLES FOR TRICK MODE VIDEO REPRESENTATIONS - This disclosure describes techniques relevant to HTTP streaming of media data. According to these techniques, a server device may signal a byte range for at least one intra-decodable (I-frame) of a video fragment. According to the techniques of this disclosure, a client device may communicate a request to a server device to retrieve the at least one I-frame based on the signaled byte range, and use the retrieved I-frame to provide a high speed version of a video presentation that includes the at least one I-frame. A high speed version of a video presentation may be a trick mode of the video presentation, such as a fast forward or fast rewind version of the video presentation.12-29-2011
20110317759SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR PARAMETER ESTIMATION FOR LOSSLESS VIDEO COMPRESSION - Methods and systems to improve the efficiency of video processing. Compression/decompression efficiency for a current frame may be enhanced by using an appropriate coding parameter. To choose an appropriate coding parameter, a histogram of the previous frame's symbols may be created. The histogram may be used to predict the number of bits the current frame will contain after lossless compression, given a specific coding parameter. Iterating through all of the possible coding parameters on the previous frame histogram may yield a well-suited coding parameter with which the current frame can be compressed. This results in high compression efficiency by using the previous frame as the predictor.12-29-2011
20120044993Image Processing Device and Method - The present invention relates to an image processing device and method which enable compression efficiency to be improved.02-23-2012
20100208804MODIFIED ENTROPY ENCODING FOR IMAGES AND VIDEOS - A method and encoder for entropy encoding image data using a dynamically determined coding order, and a method and decoder for entropy decoding encoded data encoded using a dynamically determined coding order. The coding order for encoding quantized transform domain coefficients is dynamically determined for the image based on at least one characteristic of the quantized transform domain coefficients. The characteristic may be quantization step size if non-uniform quantization is employed for blocks of data.08-19-2010
20120044994IMAGE PREDICTIVE ENCODING AND DECODING DEVICE - An image predictive encoding device can efficiently encode an image, while suppressing an increase in prediction information and reducing the prediction error of a target block. In an image predictive encoding device, according to one embodiment, to produce a prediction signal of a partition in a target region, it is decided whether prediction information of a neighbouring region can be used. When prediction information of the neighbouring region can be used, a region width of the partition where the prediction information of the neighbouring region is used to produce the prediction signal is determined. The prediction signal of the target region is produced from a reconstructed signal based on at least one of the region width, the prediction information of the target region, and the prediction information of the neighbouring region. The prediction information, information identifying the region width, and a residual signal are encoded.02-23-2012
20120044992LOW COMPLEXITY ADAPTIVE FILTER - An interim filter determined for a previous series of video blocks can be applied to a current series of video blocks to determine an interim filter map for the current series of video blocks. Based on the interim filter map, a decoding filter can be determined. By applying the decoding filter to the current series of video blocks, a decoding filtering map can be determined. Based on CUs identified as having filtering off by the decoding filtering map, an interim filter for the current series of video blocks can be determined. The decoding filter and decoding filtering map can be transmitted to a decoder, while the interim filter and interim filter map may not be transmitted to a decoder. The interim filter for the current series of video blocks can be used to generate an interim filter map for a next series of video blocks.02-23-2012
20120044991MOVING IMAGE CODING APPARATUS AND MOVING IMAGE CODING METHOD - A moving image coding apparatus of one embodiment includes a prediction image generator that generates a prediction image abased on a moving image, a processor that performs deblocking process based on residual data that is generated based on a prediction residual being a difference between an input image of the moving image and the prediction image, and the prediction image, and an evaluator that evaluates the deblocking process based on the input image, the residual data, the prediction image, and the deblocked data. The moving image coding apparatus further includes a parameter determiner that calculates a threshold for determining presence or absence of the deblocking process based on a result of the evaluation by the evaluator and determines a parameter for deblocking based on the threshold, and an encoder that codes moving image data based on the prediction residual and the parameter.02-23-2012
20120002725Video coding apparatus and video coding control method - In a video coding apparatus, a plurality of coding units perform compression coding of a single source stream of video data. A control unit controls those coding units in such a way that all the coding units produce respective interframe coded pictures with identical playback times as a first-coded picture in a picture group (e.g., GOP) and produce identical local decoded pictures based on the respective intraframe coded pictures. A selection decision unit makes a selection, for each picture group, of one of the coded video data from the coding units on the basis of their coding results. According to this selection, a selection unit selectively outputs one of the coded video data. This output switching operation is performed at a point immediately before a forward interframe predictive coded picture that appears first of those in a picture group included in each of the coded video data outputs being switched.01-05-2012
20080253451Methods for real-time monitoring time reference in decoding systems - A method for real-time monitoring time related information in a bitstream by employing a prediction model is disclosed. When a bitstream is inputted to an decoding system, the bitstream having a series of embedded time references is decoded; a current time reference of the bitstream is sequentially supplied to a prediction model in real-time to generate an estimate time reference; determine whether the next time reference is valid based on the estimate time reference; and if the next time reference is determined as invalid, the frame associated with the next time reference is dropped from the bitstream, or the next time reference is corrected. Consequently, the timing of the bitstream is constantly monitored to prevent errors caused by incorrect timing information carried by the bitstream.10-16-2008
20120207214WEIGHTED PREDICTION PARAMETER ESTIMATION - Video coding systems incorporate techniques for deriving scalars W and/or O for use in weighted prediction. W represents a scaling factor and O represents an offset value. Given a frame of input video to be coded, a prediction match may be established one or more reference frames. The input frame may be parsed into a plurality of regions. Thereafter the scaling factor W and/or offset value O may be derived by developing a system of equations relating a predicted pixel to the pixel in the frame by the scaling factor W and/or offset value O. Equations within the system may be prioritized according to priority among regions, and scaling factor W and/or offset value O may be solved for. The scaling factor W and/or offset value O may be used during weighted prediction of the input frame.08-16-2012
20120008682VIDEO CODING USING DIRECTIONAL TRANSFORMS - In one example, an apparatus for encoding video data includes a video encoder configured to calculate a residual block for a block of video data based on a predicted block formed using an intra-prediction mode, and transform the residual block using a transform mapped from the intra-prediction mode. In another example, an apparatus includes video encoder configured to receive an indication of a first intra-prediction mode in a first set of intra-prediction modes for a block of video data, determine a second intra-prediction mode from a second set of intra-prediction modes, smaller than the first set of intra-prediction modes, to which the first intra-prediction mode is mapped, determine a directional transform to which the second intra-prediction mode is mapped, and apply the directional transform to residual data of the block.01-12-2012
20120008681LOSS-ROBUST VIDEO TRANSMISSION USING TWO DECODERS - Disclosed herein is a method of decoding a sequence of prediction-coded video frames using a primary and a secondary state-dependent decoder. The method includes receiving an incomplete frame at the primary decoder, copying a state of the primary decoder into the secondary decoder, decoding and outputting the incomplete frame and subsequent frames at the primary decoder, receiving data restoring the incomplete frame, decoding the restored incomplete frame and subsequent frames at the secondary decoder until the secondary decoder has caught up with the primary decoder; and copying the state of the secondary decoder into the primary decoder; wherein the secondary decoder has access to the subsequent frames received after the incomplete frame.01-12-2012
20120008684METHOD AND APPARATUS OF ENCODING AND DECODING VIDEO SIGNAL - Provided are methods and apparatuses for encoding and decoding a video including a plurality of color components. The method of encoding includes: splitting a first color component block and neighboring pixels of the first color component block into N segments, where N is an integer, based on pixel values of the first color component block which have been previously encoded and then restored; splitting a second color component block, corresponding to the first color component block, and neighboring pixels of the second color component block into N segments according to the N segments of the first color component block and the neighboring pixels of the first color component block; predicting the N segments of the second color component block by using the neighboring pixels of the second color component block split into the N segments; and encoding the second color component block, based on a result of the prediction.01-12-2012
20120008683SIGNALING SELECTED DIRECTIONAL TRANSFORM FOR VIDEO CODING - In one example, an apparatus for encoding video data includes a video encoder configured to select an intra-prediction mode to use to encode a block of video data, determine whether the block includes a sub-block of a size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, when the block includes the sub-block of the size for which multiple transforms are possible based on the size of the sub-block and the selected intra-prediction mode, select one of the multiple possible transforms, transform the sub-block using the selected one of the multiple possible transforms, and provide an indication of the selected one of the multiple possible transforms for the size of the block.01-12-2012
20080267286Image Encoding Device and Method - An image encoding device includes a prediction processing unit which performs prediction processing on m components among N components which constitute a quantized block; a first Coded Block Pattern (CBP) judging unit which judges whether or not (N−m) components include a non-zero component in a first operation mode, and whether or not (N−n) components include a non-zero component in a second operation mode; a second CBP judging unit which judges whether or not the m components on which the prediction processing has been performed include a non-zero component in the first operation mode, and whether or not n components include a non-zero component in the second operation mode; and a CBP generating unit which generates a CBP code indicating whether or not all the components of the block are 0 components based on the judgments made by the first and second judging units.10-30-2008
20120014443DIFFERENTIAL CODING OF INTRA DIRECTIONS (DCIC) - Spatial domain directional intra prediction has been shown to be very effective to remove the correlation between the pixels in the current block and reconstructed neighbors. In AVC, 8 directional prediction modes (plus the DC prediction mode) are defined. The prediction mode number is signaled to the decoder using a simple predictive coding method. The previous intra prediction methods have two major disadvantages: lack of precision for arbitrary directional patterns and accuracy lack of accuracy to exploit geometric dependency between blocks. To address these issues, a new method accurately predicts the intra directions from reconstructed neighboring pixels and differentially encode the intra directions. This allows a more precise directional prediction without the significant increase in the cost for transmitting the side information.01-19-2012
20120014444METHOD AND APPARATUS FOR ENCODING AND DECODING IMAGE THROUGH INTRA PREDICTION - A method and apparatus for encoding and decoding an image through intra prediction using a pixel of the neighboring block along an extended line having a predetermined gradient about a pixel inside the current block.01-19-2012
20120014440PARALLEL VIDEO CODING BASED ON MAPPING - A system encoding and decoding video that uses a parallel encoding and decoding technique.01-19-2012
20120014442IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - The present disclosure provides an image processing device including, a feature quantity generating section configured to generate a feature quantity used as a determination criterion for determining which of a temporal prediction using correlation between images in a temporal direction and a parallactic prediction using correlation between images of different visual points is dominant in image coding, and a reference index assigning section configured to assign reference indices to reference pictures used in the predictions on a basis of the feature quantity generated by the feature quantity generating section.01-19-2012
20120014441PARALLEL VIDEO CODING BASED ON BOUNDARIES - A system encoding and decoding video that uses a parallel encoding and decoding technique.01-19-2012
20120014437PARALLEL VIDEO CODING BASED ON SAME SIZED BLOCKS - A system encoding and decoding video that uses a parallel encoding and decoding technique.01-19-2012
20120014436PARALLEL VIDEO CODING BASED ON BLOCK SIZE - A system encoding and decoding video that uses a parallel encoding and decoding technique.01-19-2012
20120250765Method and Arrangement for Video Coding - Methods and arrangements in video encoding and decoding entities. The methods and arrangements relate to the joint encoding of reference information associated with encoded video. The method and arrangement in a decoding entity relate to obtaining (10-04-2012
20120250764PROCESS FOR CODING VIDEO DATA OF A SEQUENCE OF IMAGES - The process comprising splitting of an image into blocks, intra coding of a current block using spatial prediction based on a matching pursuit algorithm selecting, from a dictionary of atoms, the atom the most correlated with a causal neighborhood of the current block, is characterized in that it performs the following steps: determination of the two dimensional shift between the causal neighborhood and the selected atom, generation of at least, a new phased atom taking into account the values of the two dimensional spatial shift, use of this new atom for intra prediction, according to the matching pursuit algorithm, if better correlated than the selected one. Application to video data compression.10-04-2012
20100111167METHOD AND APPARATUS FOR ENCODING AND/OR DECODING BIT DEPTH SCALABLE VIDEO DATA USING ADAPTIVE ENHANCEMENT LAYER PREDICTION - A scalable video bitstream may have an H.264/AVC compatible base layer (BL) and a scalable enhancement layer (EL), where scalability refers to color bit depth. The SVC standard allows spatial inter-layer prediction, wherein a residual in the EL is generated which is then intra coded. Another spatial intra-coding mode for EL is pure intra coding (I_N×N). The invention discloses a new intra-coding mode and two new inter coding modes, particularly for bit depth scalability. The new intra coding mode uses encoding of the residual between upsampled reconstructed BL and original EL, using mode selection. Two possible modes are residual prediction from BL and additional intra-coding of this residual. The new inter coding modes use also prediction of EL from reconstructed BL. In a first inter coding mode, the residual is encoded using Motion Estimation based on this residual. In a second inter coding mode, the residual is encoded using upsampled motion information from the BL.05-06-2010
20120155538METHODS AND DEVICES FOR CREATING, DECODING AND TRANSCODING AN ENCODED VIDEO DATA STREAM - An image block is encoded by an inter-layer prediction into a first encoded image block and also encoded into a second encoded image block based on an encoding mode that excludes inter-layer prediction. The encoded first and second image blocks are decoded into reconstructed first and second image blocks, respectively. The first encoded image block is inserted into the encoded video stream. When encoding image blocks by an encoding mode that references the reconstructed first image block, the reference to the reconstructed second image block is changed. The image block encoded in this way is inserted into the encoded video data stream to achieve both a high compression rate with high image quality and low complexity in transcoding that can be used with different end devices by a scalable encoded video data stream, such as a video-on-demand service.06-21-2012
20120027087IMAGE DECODING DEVICE - An image decoding device for processing an input bit stream containing encoded data obtained by encoding a moving picture using intra-frame prediction, includes a stream divider configured to divide the input bit stream into a plurality of sub-streams, and a plurality of image decoders each configured to decode the corresponding one of the plurality of sub-streams, thereby outputting images. The stream divider divides the input bit stream so that the plurality of sub-streams each contain the encoded data corresponding to one or more prediction units, where macroblocks of the moving picture each include a plurality of the prediction units for the intra-frame prediction.02-02-2012
20120027085Method for Encoding of a Video Stream - A temporal sequence of pictures is generated in a method for encoding of a first video stream. To do so, a synchronization signal is used which is derived from a second video stream independently of the first video stream, or the encoding of a second video stream independent of the first video stream is based on the same principle as for the encoding of the first video stream.02-02-2012
20120027084METHODS OF UTILIZING TABLES ADAPTIVELY UPDATED FOR CODING/DECODING AND RELATED PROCESSING CIRCUITS THEREOF - A method of converting first data into second data includes: determining a target symbol corresponding to the first data by utilizing a determining unit; and generating the second data corresponding to the determined target symbol. One of the first data and the second data is a syntax element, and the other of the first data and the second data is an entropy-coded result of the syntax element. The target symbol corresponding to the first data is determined adaptively according to occurrence probability of candidate syntax element values of the syntax element.02-02-2012
20100202520VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.08-12-2010
20120027086PREDICTIVE CODING APPARATUS, CONTROL METHOD THEREOF, AND COMPUTER PROGRAM - A predictive coding apparatus which performs predictive coding for each picture forming a moving picture, comprising: a prediction processing unit configured to perform prediction processing for each predetermined block unit of a picture to be coded, a transformation unit adapted to orthogonally transform and quantize a result of the prediction processing by the prediction processing unit to generate multi-valued data, a binarization unit configured to convert the multi-valued data into binary data, a detection unit configured to detect an amount of the binary data, a coding unit configured to perform arithmetically coding of the binary data to create coded data, and a multiplexing unit configured to multiplex, onto the coded data, information indicating the amount of the binary data detected by the detection unit to generate a coded data stream.02-02-2012
20120207215VIDEO INFORMATION REPRODUCTION METHOD AND SYSTEM, AND VIDEO INFORMATION CONTENT - A plurality of I- or P-pictures for displaying video images with the same data as the last frame of the main data of the content are added as reproduction synchronization adjustment frames after the last frame of the main data; when reproduction leads a reference reproducing device, more synchronization adjustment frames are reproduced (ST08-16-2012
20120177113Method and Apparatus of Improved Intra Luma Prediction Mode Coding - A method and apparatus for improved intra prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra prediction modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. In High-Efficiency Video Coding (HEVC), a coding scheme for the intra luma prediction mode is being considered, where the intra prediction mode of a current block is compared with the minimum of two intra luma prediction modes corresponding to two neighboring blocks. If the intra prediction mode of the current block is the same as the minimum of the two neighboring intra luma prediction modes, a single bit is transmitted to indicate the case. Otherwise, information for the current intra prediction mode is transmitted in fixed-length codeword. While the coding scheme for the intra luma prediction mode being considered may not fully exploit the neighboring intra luma prediction modes, it is desirable to further improve the performance. Accordingly, an improved coding scheme for intra prediction mode is disclosed, where more than one intra prediction mode candidates are derived.07-12-2012
20120177112Method and Apparatus of Improved Intra Prediction Mode Coding - A method and apparatus for improved intra chroma prediction mode coding are disclosed. Intra prediction exploits the spatial correlation within a picture or within a picture region. In practice, a picture is divided into blocks and the intra mode prediction is performed on a block basis. In newer coding systems, multiple intra coding modes such as Vertical mode, Horizontal mode, DC mode and Diagonal mode, have been used to improve the coding efficiency of intra coding. Furthermore, a Luma_mode has also been used in intra prediction of chroma component to further improve the performance in the High Efficiency Video Coding (HEVC) standard being developed. However, the mode selection information for intra prediction has to be conveyed to the decoder for proper operation. Spatial features in a picture often exist in both luma and chroma components. The intra luma prediction mode and intra chroma prediction mode will have high probability to be the same. Accordingly, an embodiment according to the present invention adaptively assigns variable length codes to a set of mode symbols associated with intra chroma prediction by assigning a shortest code to the Luma_mode. Luma_mode not only can be the best luma mode of the corresponding luma block but also can be selected from several corresponding luma modes. The maximum length of chroma prediction codes is decreased by one bit when Luma_mode is equal to one of frequent modes. The coding efficiency of arithmetic coding of chroma prediction codes is further improved by selecting the context upon neighboring blocks.07-12-2012
20120177115ENCODING AND DECODING A VIDEO IMAGE SEQUENCE BY IMAGE AREAS - The invention relates to a method for coding a sequence of video images comprising a cutting into zones of at least one current image of the sequence, 07-12-2012
20090135905PROTECTING COMMERCIALS WITHIN ENCODED VIDEO CONTENT - In one embodiment, a method comprises identifying an identifiable video object from a video picture of a digital video having video content and commercial content, the video picture contained within the video content; encoding the identifiable video object as a video overlay object; encoding the commercial content based on generating a first key frame, and storing the video overlay object within the first key frame as an object that is not displayed as part of the commercial content; and encoding the video picture based on generating a second key frame that includes a default video object in place of the identifiable video object, the default video object including an overlay reference to the video overlay object within the first key frame, wherein unavailability of the video overlay object during rendering of the second key frame causes display of the default video object to visually corrupt the video picture.05-28-2009
20090135907VIDEO ENCODING/ DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.05-28-2009
20090135906Method and Apparatus for Transmitting Multiple Video Streams Over a Video Channel - There are provided methods and apparatus for transmitting multiple video streams over a video channel. A video encoder is provided for encoding a plurality of streams corresponding to a plurality of programs. The video encoder includes an encoder (05-28-2009
20120155539VIDEO FRAME ENCODING AND DECODING - A video frame arithmetical context adaptive encoding and decoding scheme is presented which is based on the finding, that, for sake of a better definition of neighborhood between blocks of picture samples, i.e. the neighboring block which the syntax element to be coded or decoded relates to and the current block based on the attribute of which the assignment of a context model is conducted, and when the neighboring block lies beyond the borders or circumference of the current macroblock containing the current block, it is important to make the determination of the macroblock containing the neighboring block dependent upon as to whether the current macroblock pair region containing the current block is of a first or a second distribution type, i.e., frame or field coded.06-21-2012
20120300843BLOCK-BASED INTERLEAVING - At least one implementation interleaves blocks from a stereo-image pair and enables intra-coding of the interleaved image using corresponding blocks as references. One particular implementation accesses a first image that includes multiple blocks, one of which is a first-image block. A second image is accessed that includes multiple blocks, one of which is a second-image block that has overlapping content with the first-image block. The multiple blocks of the first and second images are interleaved on a block basis to form an interleaved image. At least a portion of the interleaved image is encoded by encoding the first-image block using the second-image block as a reference. Another implementation provides the encoded portion in signal. Yet another implementation accesses the encoded image and decodes the portion by using the second-image block as a reference.11-29-2012
20120300841MULTI-COMPATIBLE LOW AND HIGH DYNAMIC RANGE AND HIGH BIT-DEPTH TEXTURE AND VIDEO ENCODING SYSTEM - A method of processing image data includes generating image data including luminance and chrominance data representing a selected object, separating the luminance and chrominance data, storing the separated luminance and chrominance data in corresponding separate spaces in memory, and separately compressing the stored luminance and chrominance data.11-29-2012
20120300840IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, IMAGE ENCODING METHOD, AND IMAGE DECODING METHOD - A disparity vector detection unit retrieves a signal having a high correlation with an encoding target block and acquire the signal having the high correlation and a disparity vector which is a disparity in a screen of the encoding target block by using a local decoded image of a block in the same image signal which was previously encoded, with respect to the encoding target block. A disparity prediction signal generation unit generates a prediction signal in accordance with the disparity vector. The disparity vector detection unit includes a DC calculation unit operative to predict a DC component of an image signal of the encoding target block from a neighboring decoded image, and a disparity reference DC calculation unit operative to calculate a DC component of a prediction signal represented by the disparity vector.11-29-2012
20120300838LOW RESOLUTION INTRA PREDICTION - A video decoder decodes video from a bit-stream including a low resolution predictor that predicts pixel values based upon both a low resolution reference image and an interpolated high resolution reference image at positions different from the low resolution reference image using low resolution motion data. A high resolution predictor predicts pixel values using a non-interpolated high resolution reference image at positions different from the low resolution reference image using the low resolution motion data, wherein the non-interpolated high resolution reference image and the interpolated high resolution reference image are co-sited.11-29-2012
20110007799NON-ZERO ROUNDING AND PREDICTION MODE SELECTION TECHNIQUES IN VIDEO ENCODING - In one aspect of this disclosure, techniques are described for selecting among default weighted prediction, implicit weighted prediction, and explicit weighted prediction. In this context, techniques are also described for adding offset to prediction data, e.g., using the format of explicit weighted prediction to allow for offsets to predictive data that is otherwise determined by implicit or default weighted prediction.01-13-2011
20110007800METHODS AND APPARATUS FOR ILLUMINATION COMPENSATION OF INTRA-PREDICTED VIDEO - There are provided methods and apparatus for illumination compensation of intra-predicted video. An apparatus includes an encoder for encoding a picture using non-local intra prediction. The encoder includes an illumination compensation processing unit for applying illumination compensation to predicted data obtained from the non-local intra prediction.01-13-2011
20120155537Moving Picture Decoding Device and Moving Picture Decoding Method - One embodiment provides a moving picture decoding device for decoding a compression-coded moving picture stream, including: an inter-view predicting module configured to perform inter-view prediction processing on processing subject blocks of each frame to be decoded; a load detector configured to detect a magnitude of an apparatus processing load including a processing load for decoding; a judging module configured to judge whether the magnitude of the apparatus processing load detected by the load detector is small; and a controller configured to control the inter-view predicting module so as to cause simplification of the inter-view prediction processing if the judging module judges that the magnitude of the apparatus processing load is not small.06-21-2012
20110075734MOVING PICTURE ENCODING SYSTEM, MOVING PICTURE ENCODING METHOD, MOVING PICTURE ENCODING PROGRAM, MOVING PICTURE DECODING SYSTEM, MOVING PICTURE DECODING METHOD, MOVING PICTURE DECODING PROGRAM, MOVING PICTURE REENCODING SYTEM, MOVING PICTURE REENCODING METHOD, AND MOVING PICTURE REENCODING PROGRAM - A first super-resolution enlarger 03-31-2011
20120121016Predictive encoding and data decoding control - Decoding control apparatus for decoding predictive encoded data. A picture detector determines the fewest possible pictures which must be decoded first before decoding a picture which are to be displayed after an edit point. A start-point finder for finds the start point for decoding the fewest possible pictures determined by said picture detector even though those fewest pictures are not to be displayed. A plurality of decoders decode the encoded data in picture units, on the basis of the start point. A picture obtained by the decoders is selected on the basis of the edit point and output.05-17-2012
20080273595APPARATUS AND RELATED METHOD FOR PROCESSING MACROBLOCK UNITS BY UTILIZING BUFFER DEVICES HAVING DIFFERENT DATA ACCESSING SPEEDS - A method for processing a plurality of macroblock units in a video image is disclosed. The method includes: performing a specific video processing operation upon at least a first macroblock unit; storing information of the first macroblock unit in a first buffer device; storing the information of the first macroblock unit read from the first buffer device into a second buffer device, wherein a data accessing speed of the second buffer device is faster than a data accessing speed of the first buffer device; and performing the specific video processing operation upon a second macroblock unit in the plurality of macroblock units according to the information of the first macroblock unit stored in the second buffer device.11-06-2008
20110103473Video Compression Under Multiple Distortion Constraints - Video compression is performed under multiple distortion constraints. Video coding includes determining a first set of Lagrangian cost values for multiple coding modes using a first distortion metric, determining a second set of Lagrangian cost values for the multiple coding modes using a second distortion metric, and selecting one of the coding modes base first set of Lagrangian cost values and the second set of Lagrangian cost values to encode a pixel block using the selected coding mode. The distortion metrics can include information associated with video display characteristics such as screen display size, video processing performance, a distortion characteristic, a temporal characteristic, or a spatial characteristic. The distortion metrics can also include characteristics of multiple video displays, such as parameters for usage, importance, design, and the technology type of the video displays.05-05-2011
20120121014Processing of Multimedia Data - The invention relates to techniques for processing media data at a receiver device in a packet-switched network. It is proposed to detect data packet losses in the media data, and to determine data frames, like P-frames or I-frames, within a group of successive frames, like the GOP structure, affected by a packet loss. The number of the affected data frames is compared with a threshold value and if said number is equal or higher then the threshold value, then it is proposed to drop the affected data frames and to provide for playing-out data frames in form of a slide show.05-17-2012
20120170650LOW COMPLEXITY INTERPOLATION FILTERING WITH ADAPTIVE TAP SIZE - During a prediction stage of video coding, a video coder may use relatively longer interpolation filters to generate predictive sub-pixel values using values of reference integer pixels of a reference block of video data positioned in parallel relative to a scanning order associated with the block and may use relatively shorter interpolation filters to generate predictive sub-pixel values using values of reference integer pixels of the block positioned perpendicular relative to the scanning order, wherein a longer interpolation filter generally refers to a filter with relatively more filter coefficients, or “taps,” and a shorter filter generally refers to a filter with relatively fewer taps.07-05-2012
20120170649VIDEO CODING USING MAPPED TRANSFORMS AND SCANNING MODES - A video encoder may transform residual data by using a transform selected from a group of transforms. The transform is applied to the residual data to create a two-dimensional array of transform coefficients. A scanning mode is selected to scan the transform coefficients in the two-dimensional array into a one-dimensional array of transform coefficients. The combination of transform and scanning mode may be selected from a subset of combinations that is based on an intra-prediction mode. The scanning mode may also be selected based on the transform used to create the two-dimensional array. The transforms and/or scanning modes used may be signaled to a video decoder.07-05-2012
20100091854VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100091849VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-15-2010
20100091845Method and apparatus for decoding/encoding a video signal - The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining identification information representing the multi-view video data stream including initialization information of a reference picture list for the random access slice, obtaining initialization information of a reference picture list for the random access slice based on the identification information, the initialization information representing a reference relation between a plurality of views with view number information and view identification information, initializing the reference picture list using the view number information and the view identification information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture, list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views.04-15-2010
20120121013Apparatus, A Method and a Computer Program for Video Coding - There is disclosed an apparatus, a method and a computer program for video coding. The apparatus comprises a selector configured for selecting an encoding method from a set of encoding methods comprising at least a first encoding method and a second encoding method for encoding a block of pixels of an image. The selector is further configured for selecting at least one control point among the pixels of said block of pixels; and selecting a first reference point different from said control point. The apparatus further comprises a determinator configured for determining values of the other pixels of said selected block of pixels on the basis of the value of said control point and the value of said at least one reference point.05-17-2012
20100290526Selecting Encoding Types and Predictive Modes for Encoding Video Data - In some embodiments, a method of determining encoding type and predictive mode(s) selections for a macroblock of a video frame is provided. In some embodiments, a general method 1) selects the encoding type (16×16 or 4×4) that is initially considered for a macroblock using an encoding type selection algorithm (based on an attribute of the macroblock that is easy to compute), 2) if the 16×16 encoding type is selected in step 1, consider the four 16×16 prediction modes that may be used on the macroblock using conventional methods or an improved 16×16 predictive mode search algorithm based on distortion thresholds, and 3) if the 4×4 encoding type is selected in step 1, select the 4×4 prediction mode to be used for each of the sixteen 4×4 blocks of the macroblock using conventional methods or an improved 4×4 predictive mode search algorithm based on the positional relationships between predictive modes.11-18-2010
20120121015PROCESSING MULTIVIEW VIDEO - Decoding a multiview video signal comprises: receiving a bitstream comprising encodings of multiple views of the multiview video signal, each view comprising multiple pictures segmented into multiple segments; and obtaining a predictor for illumination compensation of a first segment with respect to a reference picture using an offset value for illumination compensation of at least one neighboring segment adjacent to the first segment according whether the reference picture associated with the first segment is the same as a reference picture associated with the neighboring segment.05-17-2012
20100246673DYNAMIC IMAGE RECEIVING APPARATUS, DYNAMIC IMAGE RECEIVING METHOD AND PROGRAM - To provide a dynamic image receiving apparatus which receives dynamic image streams coded with inter-frame prediction such as MPEG from a plurality of channels, and collects the dynamic image streams containing intra-frame coded pictures from each channel in a short time. The dynamic image receiving apparatus includes: a time information accumulative processing device which accumulates code receiving time of the intra-frame coded picture of the dynamic image stream, and periodicity time information containing one of or both of presentation time information and decoding time information contained in the dynamic image stream for each dynamic image stream of the plurality of channels; code receiving time predicting devices which predict the code receiving time of the intra-frame coded pictures based on the periodicity time information; and a channel selection control device which controls channel selection of the dynamic image stream to be received based on the predicted code receiving time information.09-30-2010
20100246672METHOD AND APPARATUS FOR HIERARCHICAL BI-DIRECTIONAL INTRA-PREDICTION IN A VIDEO ENCODER - Method and apparatus for hierarchical bi-directional intra-prediction in a video encoder is described. In some examples, initial reference blocks are selected in an image. Sets of blocks in the image are predicted successively over a plurality of stages based on a respectively plurality of templates, each of the plurality of templates including reference blocks selected from at least one of: the initial reference blocks; or previously encoded and reconstructed blocks of the image. The image is encoded in the video encoder using the initial reference blocks and the sets of blocks as predicted.09-30-2010
20120128067Apparatus and Method of Constrained Partition Size for High Efficiency Video Coding - An apparatus and method for video coding and decoding with constrained PU partition are disclosed. In the High Efficient Video Coding (HEVC) system, rate-distortion function or other performance criterion usually is evaluated for various CU partition and PU partition during the encoding process in order to select a configuration with best possible performance. The PU design in the current HEVC development results in some redundancy that causes rate-distortion function or other performance criterion repeatedly evaluated for same PU configuration. Accordingly, constrained PU partition is developed to eliminate or reduce the redundancy in processing. Furthermore, necessary syntax to convey the information related to constrained PU partition between an encoder and a decoder is developed. Systems embodying the present invention has been shown to result in sizeable reduction in encoding and decoding time while the performance in terms of RD-rate remains approximately the same or slightly higher than a conventional HEVC system.05-24-2012
20120128068METHOD FOR DECODING A STREAM OF CODED DATA REPRESENTATIVE OF A SEQUENCE OF IMAGES AND METHOD FOR CODING A SEQUENCE OF IMAGES - A method for decoding a stream of coded data representative of a sequence of images is disclosed. The decoding method comprises05-24-2012
20120163454FIELD/FRAME ADAPTIVE DECODING WITH FIELD/FRAME INDEX - A moving picture coding method for coding a picture with switching between frame coding and field coding adaptively on a block-by-block basis includes: determining the maximum number of reference indices for field coding for specifying fields which are to be referred to at the time of field coding, using the maximum number of reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding; and assigning to fields the reference indices for field coding for specifying fields which are to be referred to at the time of field coding, within a range of the determined maximum number thereof, using the reference indices for frame coding for specifying frames which are to be referred to at the time of frame coding.06-28-2012
20120163453METHOD AND SYSTEM FOR PICTURE SEGMENTATION USING COLUMNS - Described is picture segmentation through columns and slices in video encoding and decoding. A video picture is divided into a plurality of columns, each column covering only a part of the video picture in a horizontal dimension. All coded tree blocks (“CTBs”) belonging to a slice may belong to one or more columns. The columns may be used to break the same or different prediction or in-loop filtering mechanisms of the video coding, and the CTB scan order used for encoding and/or decoding may be local to a column. Column widths may be indicated in a parameter set and/or may be adjusted at the slice level. At the decoder, column width may be parsed from the bitstream, and slice decoding may occur in one or more columns.06-28-2012
20120163452METHOD AND SYSTEM FOR SELECTIVELY BREAKING PREDICTION IN VIDEO CODING - Described are techniques in video coding and/or decoding that allow for selectively breaking prediction and/or in loop filtering across segment boundaries between different segments of a video picture. A high layer syntax element, such as a parameter set or a slice header, may contain one or more indications signalling to an encoder and/or decoder whether an associated prediction or loop filtering tool may be applied across the segment boundary. In response to such one or more indications, the encoder and/or decoder may then control the prediction or loop filtering tool accordingly.06-28-2012
20120163451Method for Coding Videos Using Dictionaries - A video encoded as a bit stream is decoded by maintaining a set of dictionaries generated from decoded prediction residual signals, wherein elements of the set of dictionaries have associated indices. A current macroblock is entropy decoded and inverse quantized to produce decoded coefficients. For the current macroblock, a particular dictionary of the set of dictionaries is selected according to a prediction mode signaled in the bit stream, and particular elements of the particular dictionary are selected according to a copy mode signal in the bit stream and the associated index. The particular elements is scaled and combined, using the decoded coefficients, to reconstruct a current decoded macroblock prediction residual signal. Then, the current decoded macroblock prediction residual signal is combined with previously decoded macroblocks to generate an output macroblock of a reconstructed video, wherein the steps are performed in a decoder.06-28-2012
20100208806IN-LOOP DEBLOCKING FOR INTRA-CODED IMAGES OR FRAMES - Methods and encoders/decoders for applying in-loop deblocking to intra-coded images/frames. In a decoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block prior to decoding the subsequent block in the decoding sequence. In an encoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block in an inter-coding loop before encoding a subsequent block in the coding order for the image.08-19-2010
20100208805ADAPTIVE QUANTIZATION WITH BALANCED PIXEL-DOMAIN DISTORTION DISTRIBUTION IN IMAGE PROCESSING - Methods and encoders and decoders for adaptively quantizing transform domain coefficients in image and/or video encoding/decoding. For an image having a number of blocks, each block having N coefficients, the quantization step size for each coefficient is selected dynamically, thus resulting in a quantizer that may apply different step sizes to different coefficients. The selected step sizes for each coefficient are used for those coefficients within all blocks in the image/frame. In one aspect, the step sizes are selected on the basis of balancing pixel domain distortion when the image/frame is decoded.08-19-2010
20100208803IMAGE ENCODING AND DECODING APPARATUSES, IMAGE ENCODING AND DECODING METHODS, PROGRAMS THEREOF, AND RECORDING MEDIA RECORDED WITH THE PROGRAMS - A method for encoding an image using an intraframe prediction is provided which includes selecting a gradient of a pixel value that is indicated by an image signal to be predicted among a plurality of gradient candidates, generating a predicted signal by applying a gradient in accordance with the distance from a prediction reference pixel based on the gradient, intraframe-encoding the image signal to be predicted based on the predicted signal, and encoding information indicating the size of the selected gradient. Alternatively, the method includes estimating the gradient of a pixel value that is indicated by an image signal to be predicted based on an image signal which has already been encoded, generating a predicted signal by applying a gradient in accordance with the distance from a prediction reference pixel based on the gradient, and intraframe-encoding the image signal to be predicted based on the predicted signal.08-19-2010
20100208802IMAGE ENCODING DEVICE, IMAGE ENCODING METHOD, IMAGE DECODING DEVICE, IMAGE DECODING METHOD, PROGRAM, AND STORAGE MEDIUM - A prediction set determining section (08-19-2010
20100208810METHOD AND APPARATUS FOR INTER-LAYER RESIDUE PREDICTION FOR SCALABLE VIDEO - There are provided methods and apparatus for inter-layer residue prediction for scalable video. An apparatus is described for an encoder for encoding a block of a picture, or a decoder for decoding a block of a picture, by applying inverse tone mapping to an inter-layer residue prediction process for the block, wherein the inverse tone mapping is performed in the pixel domain. Methods for encoding or decoding a block of a picture are also described; and performed by applying inverse tone mapping to an inter-layer residue prediction process for the block, wherein the inverse tone mapping is performed in the pixel domain.08-19-2010
20100208811IMAGE CODING APPARATUS WITH SEGMENT CLASSIFICATION AND SEGMENTATION-TYPE MOTION PREDICTION CIRCUIT - A segmenting section divides an input image into a plurality of segments. A hierarchizing section determines classes of the respective segments according to a predetermined criterion, and produces a class identification signal indicating the classes of the respective segments. A coding section encodes the segmented image signal into code data while changing the value of a coding control parameter for each of the segments in accordance with the class identification signal. Examples of the coding control parameter are a coding time interval and precision of quantization.08-19-2010
20110182358WAVELET TRANSFORM APPARATUS AND METHOD BASED ON PREDICTION-UPDATE LIFTING SCHEME, AND ADAPTIVE PREDICTION APPARATUS AND METHOD AND RECORDING MEDIUM FOR THE SAME - The present disclosure relates to a wavelet transform apparatus and method based on a prediction-update lifting scheme, and an adaptive prediction apparatus and method and a recording medium for the same. The disclosure comprises the steps of: setting first updated even polyphase samples influenced when being updated from corresponding odd polyphase samples, setting plural candidate groups for prediction direction based on the set first updated even polyphase samples, selecting a first prediction direction from the candidate groups to minimize the energy in a high band, obtaining a first prediction value based on the first prediction direction and the updated even polyphase samples corresponding to the first prediction direction, and obtaining residual odd polyphase samples by deducting the first prediction value from the corresponding odd polyphase samples. Therefore, the present disclosure is able to increase encoding efficiency by minimizing energy transfer to a high band signal when removing the spatial correlation within an image using a directional wavelet transform designed based on the prediction-update lifting scheme.07-28-2011
20110182357INTRA PREDICTION METHOD AND APPARATUS, AND IMAGE ENCODING/DECODING METHOD AND APPARATUS USING SAME - The present disclosure relates to an intra prediction method and apparatus and an image encoding/decoding method and apparatus using the same. The disclosure provides the intra prediction apparatus that predicts the pixel values of respective pixels in a current block by weight-averaging the pixel values of one or more adjacent pixels in neighboring blocks to the current block according to the distances between each pixel in the current block and the adjacent pixel(s). According to the disclosure, the current block to be encoded can be predicted more accurately so that the encoding efficiency is improved by reducing the difference between the original block and the predicted block, and thereby video compression efficiency can be improved.07-28-2011
20120213278MOVING IMAGE CODING DEVICE, MOVING IMAGE DECODING DEVICE, MOVING IMAGE CODING/DECODING SYSTEM, MOVING IMAGE CODING METHOD AND MOVING IMAGE DECODING METHOD - A frequency transformation determination unit determines whether a plurality of adjacent transformation target regions with the partition boundary interposed therebetween are integrated or not. A transformation coefficient generation unit generates, by applying one frequency transformation, a transformation coefficient for the transformation target regions where the frequency transformation determination unit determined to integrate.08-23-2012
20120213276PICTURE CODING METHOD AND PICTURE DECODING METHOD - A picture coding apparatus (08-23-2012
20120213275SCALABLE VIDEO CODING AND DEVICES PERFORMING THE SCALABLE VIDEO CODING - A data processing system includes a scalable encoder including an encoder and a control module. The encoder includes at least two layer encoders and has an encoder configuration determined during initialization. The control module is configured to generate an encoder control code in accordance with transmission conditions of a communication channel, the encoder control code controlling operation of the at least two encoding layers.08-23-2012
20120213274FILTERING METHOD, MOVING PICTURE CODING APPARATUS, MOVING PICTURE DECODING APPARATUS, AND MOVING PICTURE CODING AND DECODING APPARATUS - A filtering method according to the present invention is for filtering a plurality of blocks included in an image, and comprises: determining whether each of the blocks is an IPCM block or not; filtering a non-IPCM block that is not an IPCM block among the blocks to generate filtered data; outputting the filtered data as pixel values of the non-IPCM block, and outputting pixel values of the unfiltered IPCM block as pixel values of the IPCM block.08-23-2012
20120213279METHODS AND APPARATUS FOR DC INTRA PREDICTION MODE FOR VIDEO ENCODING AND DECODING - Methods and apparatus are provided for DC intra prediction mode for video encoding and decoding. An apparatus includes a video encoder for encoding image data for at least a portion of an input picture by deriving a direct current prediction value from a pre-determined constant and using the derived direct current prediction value for a direct current intra prediction mode. The portion is encoded using the direct current intra prediction mode.08-23-2012
20090060035TEMPORAL SCALABILITY FOR LOW DELAY SCALABLE VIDEO CODING - A method of processing video information which includes receiving encoded video information including an encoded base layer frame and encoded enhanced layer frames for providing temporal scalability, decoding the encoded video information in display order, and using a decoded first enhanced layer frame as a reference frame for decoding a second enhanced layer frame for forward prediction. Processing the video information in display order and using a decoded enhanced layer frame as a reference frame for processing another enhanced layer frame for forward prediction reduces coding latency for achieving temporal scalability for low delay scalable video coding. The coding memory space may also be reduced as compared to bidirectional prediction coding since the number of reference frames used for coding may be reduced.03-05-2009
20090060038Encoding device and encoding method and decoding device and decoding method - An encoding device including a calculation result storage unit adapted to store information based on a result of a difference calculation of the differential encoding along with information on a referenced picture used for the differential calculation a determination unit determining from the information on the referenced picture stored in the calculation result storage unit whether the difference calculation has been performed on the picture to be referred used for the difference calculation of a picture which undergoes the image compression, as a reference target of the difference calculation and a differential encoding unit reading from the calculation result storage unit the information on the result of the difference calculation corresponding to the picture to be referred and performs the differential encoding based on a determination by the determination unit that the difference calculation has been performed, as the reference target, on the picture to be referred.03-05-2009
20090060037METHOD AND SYSTEM FOR DETERMINING PREDICTION MODE PARAMETER - For determining a prediction mode parameter, a macroblock of an image is divided into a plurality of blocks; most prediction mode parameters corresponding to a plurality of first blocks along a left most edge of the macroblock are determined; most prediction mode parameters corresponding to a plurality of second blocks along a top most edge of the macroblock are determined; and the most prediction mode parameters of the first and second blocks are stored into a buffer allocated with designated position for the plurality of blocks.03-05-2009
20090060036Coding Apparatus, Coding Method, Decoding Apparatus, and Decoding Method - A coding apparatus includes: a storage section that stores information for coding an image area to be currently coded in a direct prediction mode that predicts motion information of an image area to be coded by referring to motion information of a previously coded image area; a deriving section that derives motion information of the image area in the direct prediction mode by referring to the information stored in the storage section; a selecting section that selects a prediction mode for coding the image area to be coded, in accordance with the motion information derived by the deriving section; and a determining section that determines information necessary for the deriving section to derive motion information of an uncoded image area, from coding information applied in the prediction mode selected by the selecting section to the image area to be coded, and stores only information determined necessary into the storage section.03-05-2009
20120250766Method and Arrangement for Video Coding - Methods and arrangements in video encoding and decoding entities. The methods and arrangements involve determining (10-04-2012
20120170652METHODS AND APPARATUS FOR EFFICIENT VIDEO ENCODING AND DECODING OF INTRA PREDICTION MODE - Methods and apparatus are provided for efficient video encoding and decoding of intra prediction mode. An apparatus includes a video encoder for encoding picture data for at least a block in a picture by determining a spatial pattern for a decoded intra prediction mode residue used to reconstruct the picture at the video encoder. The decoded intra prediction mode residue is obtained by inverse quantizing and inverse transforming a transformed and quantized difference between an original version of the block and at least one reference block. The spatial pattern is used to determine an intra prediction mode for encoding the block.07-05-2012
20120170651Video Encoding Method and Decoding Method, Apparatuses Therefor, Programs Therefor, and Storage Media which Store the Programs - A video encoding method includes selecting a reference vector target frame and a reference frame from among already-encoded frames; encoding information for designating each frame; setting a reference vector for indicating an area in the reference vector target frame with respect to an encoding target area; encoding the reference vector; performing a corresponding area search by using image information of a reference vector target area, which belongs to the reference vector target frame and is indicated by the reference vector, and the reference frame; determining a reference area in the reference frame based on the search result; generating a predicted image by using image information of the reference frame, which corresponds to the reference area; and encoding differential information between image information of the encoding target area and the predicted image.07-05-2012
20120076205Methods and Systems for Capturing Wide Color-Gamut Video - Aspects of the present invention relate to systems and methods for capturing, encoding and decoding wide color-gamut video. According to a first aspect of the present invention, a plurality of processed image frames are associated with a legacy bit-stream, and a plurality of unprocessed image frames are associated with an enhancement bit-stream.03-29-2012
20120076204METHOD AND APPARATUS FOR SCALABLE MULTIMEDIA BROADCAST USING A MULTI-CARRIER COMMUNICATION SYSTEM - A wireless distribution system is provided where multiple carrier frequencies/channels are used to facilitate transmission of scalable multimedia content. Some carrier frequencies are assigned to carry base layer data for one or more program/content channels and some other carrier frequencies are assigned to carry data for one or more enhancement layers associated with the base layer data of one or more program/content channels. The enhancement layer carrier frequency may be shared among program/content channels transmitted over multiple different base layer carrier frequencies. Different numbers of enhancement layers and their bandwidth may correspond to different refinements of the multimedia content.03-29-2012
20120177111EFFICIENT CLIPPING - A method for clipping pixel values of image and video data, and a method and an apparatus for encoding and decoding video data is provided. During the encoding and decoding process of video data, pixels are identified that are outside a certain range of allowable values. These out-of-scope pixels are corrected by replacing their original value with a replacement value within said range, i.e., by either the minimum or the maximum value of said range. In addition, pixels in the neighborhood of the out-of-scope pixels are corrected as well, even if their value is within the allowable range, in order to account for inter-pixel correlations. The correction of neighboring pixels may be performed by adding a correction value that is computed on the basis of the difference between the original value and the replacement value of the out-of-scope pixel.07-12-2012
20120314766ENHANCED INTRA-PREDICTION MODE SIGNALING FOR VIDEO CODING USING NEIGHBORING MODE - This disclosure describes techniques for intra-prediction mode signaling for video coding. In one example, a video coder is configured to determine, for a block of video data, a set of most probable intra-prediction modes such that the set of most probable intra-prediction modes has a size that is equal to a predetermined number that is greater than or equal to two. The video coder is also configured to code a value representative of an actual intra-prediction mode for the block based at least in part on the set of most probable intra-prediction modes and code the block using the actual intra-prediction mode. The video coder may further be configured to code the block using the actual intra-prediction mode, e.g., to encode or decode the block. Video encoders and video decoders may implement these techniques.12-13-2012
20100272174IMAGE DECODING DEVICE, IMAGE CODING DEVICE, IMAGE DECODING METHOD, IMAGE CODING METHOD, AND PROGRAM - An image decoding device is provided which is capable of decoding views coded using inter-view prediction even when decoding is not instantly completed. The image decoding device includes: a decoding processing unit (10-28-2010
20120177117Encoding Apparatus, Encoding Method, and Program of Same - An encoding apparatus for encoding progressive image data and interlace image data corresponding to this progressive image data, having a first encoding unit configured to encode picture data composing the interlace image data to generate first encoded data and decoding and recomposing the first encoded data to generate recomposed image data, an up sample processing unit configured to up sample the generated recomposed image data to generate image data having the same resolution as that of the progressive image data, and a second encoding unit configured to encode the picture data composing the progressive image data to generate second encoded data using the generated image data as predictive image data.07-12-2012
20100027625APPARATUS FOR ENCODING AND DECODING - An apparatus for encoding a sequence of samples of an audio signal, with each sample within the sequence having an original position, includes a sorter for sorting the samples depending on their sizes, in order to obtain a sorted sequence of samples, with each sample having a sorting position within the sorted sequence. Furthermore, the apparatus has an encoder for encoding the sorted samples and information on a relation between the original and sorting positions of the samples.02-04-2010
20100008418METHOD AND APPARATUS FOR ENCODING AND/OR DECODING VIDEO DATA USING ENHANCEMENT LAYER RESIDUAL PREDICTION FOR BIT DEPTH SCALABILITY - A scalable video bitstream may have an H.264/AVC compatible base layer and a scalable enhancement layer, where scalability refers to color bit depth. The H.264/AVC scalability extension SVC provides also other types of scalability, e.g. spatial scalability where the number of pixels in BL and EL are different. According to the invention, BL information is upsampled in two logical steps, one being texture upsampling and the other being bit depth upsampling. Texture upsampling is a process that increases the number of pixels, and bit depth upsampling is a process that increases the number of values that each pixel can have, corresponding to the pixels color intensity. The upsampled BL data are used to predict the collocated EL. The BL information is upsampled at the encoder side and in the same manner at the decoder side, wherein the upsampling refers to spatial and bit depth characteristics.01-14-2010
20120219061VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, AND METHOD - Provided are a scalable video encoding apparatus, a scalable video decoding apparatus, and method. The scalable video encoding apparatus includes a first encoding unit to generate a base layer bitstream, which is to be used for generating a reconstructed image having a second resolution, by encoding an original image having a first resolution into an encoded image having the second resolution, and a second encoding unit to generate an enhancement layer bitstream by reconstructing the reconstructed image having the second resolution, which is received from the first encoding unit, to be a reconstructed image having the first resolution in response to an interpolation mode signal, and then to encode the original image having the first resolution by using the reconstructed image having the first resolution, where the enhancement layer bitstream contains additional information for generating a reconstructed image having the first resolution or a third resolution.08-30-2012
20080267289Method And Device For Performing Interpolation In Scalable Video Coding - An interpolating method and a device for interpolating in grade video compression are disclosed. They apply mutual independent accurate interpolation filters to the luminance component and the chroma component, in which, their tap coefficients are mutual independent and the filters can be symmetric or not. And the interpolating result is used in interpolating in scalable video coding for a good effect. The increment of the compression efficiency and the reduction of the complexity can be realized. The interpolating method can be executed in the interpolating device.10-30-2008
20100284461Encoding Filter Coefficients - A method of encoding a plurality of adaptive filter coefficients (11-11-2010
20120314767BORDER PIXEL PADDING FOR INTRA PREDICTION IN VIDEO CODING - A video coder performs a padding operation that processes a set of border pixels according to an order. The order starts at a bottom-left border pixel and proceeds through the border pixels sequentially to a top-right border pixel. When the padding operation processes an unavailable border pixel, the padding operation predicts a value of the unavailable border pixel based on a value of a border pixel previously processed by the padding operation. The video coder may generate an intra-predicted video block based on the border pixels.12-13-2012
20120275515VIDEO ENCODING DEVICE, VIDEO ENCODING METHOD, AND VIDEO ENCODING PROGRAM - A video encoding device includes a re-encoding picture type judgment unit which judges whether a picture is to be taken as a reference picture or not in a subsequent re-encoding process. A prediction error generation unit generates a prediction error signal so that only a picture to be a reference picture is formed when an encoded picture is formed. The video encoding device includes a quantization control unit for, when the re-encoding picture type judgment unit judges that the picture is to be taken as a reference picture in the subsequent re-encoding process, controlling so that a quantization step for quantization by a quantization unit is smaller than a case where the picture is judged to be taken as a non-reference picture.11-01-2012
20120082221Multiple Predictor Set For Intra Coding with Intra Mode Prediction - An apparatus comprising a codec configured to predict an intra mode for a considered block based on a plurality of group numbers and a plurality of corresponding group indices for a plurality used modes of a plurality of adjacent blocks to the considered block, wherein a group number corresponding to an actual intra mode for the considered block is coded and sent if the predicted intra mode does not match the actual intra mode. Also disclosed is a network component comprising a processor configured to predict an intra mode for a considered block based on a minimum group number and a minimum group index of two used modes for two adjacent blocks of the considered block, and a transmitter configured to send coded bits of a group number for an actual intra mode for the considered block if the actual intra mode does not match the predicted intra mode.04-05-2012
20120082220INTRA-MODE PREDICTION FOR A VIDEO TRANSCODER - A video transcoder for converting an encoded input video bit-stream having one spatial resolution into an encoded output video bit-stream having a lower spatial resolution, wherein learned statistics of intra-mode transcoding are used to constrain the search of intra modes for the output video bit-stream. The statistics of intra-mode transcoding can be gathered, e.g., by applying brute-force downsizing to a training set of video frames and then analyzing the observed intra-mode transcoding patterns to determine a transition-probability matrix for use during normal operation of the transcoder. The transition-probability matrix enables the transcoder to select appropriate intra modes for the output video bit-stream without performing a corresponding exhaustive full search, which advantageously reduces the computational complexity and processor load compared to those of a comparably performing prior-art video transcoder.04-05-2012
20120082226SYSTEMS AND METHODS FOR ERROR RESILIENT SCHEME FOR LOW LATENCY H.264 VIDEO CODING - A new approach is proposed that contemplates systems and methods to support error resilient coding of H.264 compatible video streams for low latency/delay multimedia communication applications by utilizing and integrating a plurality of error resilient H.264 encoding/decoding schemes in an efficient manner. These error resilient H.264 encoding/decoding schemes can be used to offer a better quality video even when there is network loss of picture frames in the video stream. It has the ability to recover from such loss and recover faster than other techniques without requiring additional data/frames to be sent over the network to achieve the same level of recovery.04-05-2012
20120082225SELECTIVE INDICATION OF TRANSFORM SIZES - During a video encoding process, a video encoder may transform the residual data of a coding unit (CU) using a single transform if the CU only has a single prediction unit (PU). If the CU has multiple PUs, the video encoder may transform the residual data using multiple transforms. The video encoder outputs an indication of the size of a transform used to transform residual data of the CU only when the CU has more than one PU. If a video decoder receives such an indication, the video decoder may reconstruct residual data of the CU using a transform of the indicated size. Otherwise, the video decoder may reconstruct the residual data of the CU using a transform having same size as the CU.04-05-2012
20120082224INTRA SMOOTHING FILTER FOR VIDEO CODING - This disclosure relates to techniques for reducing the amount of additional data encoded with a block encoded using intra-predictive coding. Particularly, the techniques provide apparatus and methods of applying a smoothing filter to prediction samples used in intra-predictive coding. For example, in fixed mode-dependent intra-predictive coding, a video encoder may determine the type of smoothing filter applied to prediction samples based on block size and intra-prediction mode combination associated with the current block, where the combination is used to look up a filter in a first filter table. In adaptive mode-dependent intra-predictive coding, the encoder uses two filters, one from the first filter table and another from a second filter table, applies both filters, and determines which yields better results. When the second filter table filter yields better results, the encoder encodes a filtering indication. When a filter from the first filter table is used, no filtering indication is encoded.04-05-2012
20120082223INDICATING INTRA-PREDICTION MODE SELECTION FOR VIDEO CODING - For a block of video data, a video encoder can signal to a video decoder a selected intra-prediction mode using a codeword that is mapped to a modified intra-prediction mode index. The video decoder can receive the codeword, determine the modified intra-prediction mode index corresponding to the codeword, determine most probable modes based on a context, map the modified intra-prediction mode index to an intra-prediction mode index by comparing the modified intra-prediction mode index to the mode indexes of the most probable modes, and determine the selected intra-prediction mode used to encode the block of video data based on the intra-prediction mode index.04-05-2012
20120082222VIDEO CODING USING INTRA-PREDICTION - In general, techniques of this disclosure are related to determining a prediction characteristic associated with a coding unit of video data, wherein determining the prediction characteristic includes determining a prediction type that defines a number of prediction units associated with the coding unit. Techniques of this disclosure may also be related to generating a set of available intra-prediction modes for the coding unit based on the prediction characteristic, selecting an intra-prediction mode from the available intra-prediction modes, and applying one of the available intra-prediction modes to code the coding unit.04-05-2012
20120082219Content adaptive deblocking during video encoding and decoding - Disclosed herein are exemplary embodiments of methods, apparatus, and systems for performing content-adaptive deblocking to improve the visual quality of video images compressed using block-based motion-predictive video coding. For instance, in certain embodiments of the disclosed technology, edge information is obtained using global orientation energy edge detection (“OEED”) techniques on an initially deblocked image. OEED detection can provide a robust partition of local directional features (“LDFs”). For a local directional feature detected in the partition, a directional deblocking filter having an orientation corresponding to the orientation of the LDF can be used. The selected filter can have a filter orientation and activation thresholds that better preserve image details while reducing blocking artifacts. In certain embodiments, for a consecutive non-LDF region, extra smoothing can be imposed to suppress the visually severe blocking artifacts.04-05-2012
20120082218Methods and Systems for Entropy Coder Initialization - Aspects of the present invention are related to systems and methods for initialization of entropy encoders and decoders.04-05-2012
20120082217MOTION COMPENSATION USING DECODER-DEFINED VECTOR QUANTIZED INTERPOLATION FILTERS - The present disclosure describes use of dynamically assignable interpolation filters as part of motion compensated prediction. An encoder and a decoder each may store common codebooks that define a variety of interpolation filters that may be applied to predicted video data. During runtime coding, an encoder calculates characteristics of an ideal interpolation filter to be applied to a reference block that would minimize prediction error when the reference block would be used to predict an input block of video data. Once the characteristics of the ideal filter are identified, the encoder may search its local codebook to find a filter that best matches the ideal filter. The encoder may filter the reference block by the best matching filter stored in the codebook as it codes the input block. The encoder also may transmit an identifier of the best matching filter to a decoder, which will use the interpolation filter on predicted block as it decodes coded data for the block. The encoder and decoder may build their codebooks and maintain them independently from the other but in synchronism. The encoder and decoder may use decoded pixel block data as source data for calculation of interpolation filters.04-05-2012
20120257674METHOD AND ARRANGEMENT FOR JOINTLY ENCODING A PLURALITY OF VIDEO STREAMS - A method for jointly encoding a plurality of video streams (IV10-11-2012
20120263231Temporal Motion Data Candidate Derivation in Video Coding - A method for derivation of a temporal motion data (TMD) candidate for a prediction unit (PU) in video encoding or video decoding is provided. The derived TMD candidate is for inclusion in an inter-prediction candidate list for the PU. The method includes determining a primary TMD position relative to a co-located PU in a co-located largest coding unit (LCU), wherein the co-located PU is a block in a reference picture having a same size, shape, and coordinates as the PU, and selecting at least some motion data of a secondary TMD position as the TMD candidate when the primary TMD position is in a bottom neighboring LCU or in a bottom right neighboring LCU of the co-located LCU, wherein the secondary TMD position is determined relative to the co-located PU.10-18-2012
20120328013Luma-Based Chroma Intra-Prediction for Video Coding - A method for luma-based chroma intra-prediction in a video encoder or a video decoder is provided that includes down sampling a first reconstructed luma block of a largest coding unit (LCU), computing parameters α and β of a linear model using immediate top neighboring reconstructed luma samples and left neighboring reconstructed luma samples of the first reconstructed luma block and reconstructed neighboring chroma samples of a chroma block corresponding to the first reconstructed luma block, wherein the linear model is Pred12-27-2012
20090016434DEVICE AND METHOD FOR SCALABLY ENCODING AND DECODING AN IMAGE DATA STREAM, A SIGNAL, COMPUTER PROGRAM AND AN ADAPTATION MODULE FOR A CORRESPONDING IMAGE QUALITY - A method is provided for encoding a sequence of images generating a data stream in the form of a structure of embedded data layers of n successive levels each of which corresponds to the predetermined resolution of said images. Said method comprises an encoding stage, which encodes at least one of said layers of an n+1 level by prediction on the basis of said level n layer and encodes each data layer of the level n in the form of a base sub-stream and, optionally, in the form of at least one enhancement sub-stream enabling to obtain at least one version of the enhanced quality of said images. The method also encodes, for at least one data layer of the n level, at least one single sub-stream enabling to reconstruct the version of said images at said level n resolution with a quality higher than said enhanced qualities, wherein said single sub-steam of the level n layer is not used during the prediction encoding of the layers of a level other than the level n.01-15-2009
20120328010IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type.12-27-2012
20120328012IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and to the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is “inter_pred_flag”.12-27-2012
20120328011IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - The image decoding method includes: determining a context for use in a current block to be processed, from among a plurality of contexts; and performing arithmetic decoding on a bit sequence corresponding to the current block, using the determined context, wherein in the determining: the context is determined under a condition that control parameters of neighboring blocks of the current block are used, when the signal type is a first type, the neighboring blocks being a left block and an upper block of the current block; and the context is determined under a condition that the control parameter of the upper block is not used, when the signal type is a second type, and the second type is one of “ref_idx_l0” and “ref_idx_l1”.12-27-2012
20120328009IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE CODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image decoding method of decoding, on a block-by-block basis, image data included in a coded stream includes: deriving candidates for an intra prediction mode to be used for intra prediction for a decoding target block, the number of the candidates constantly being a plural number; obtaining, from the coded stream, an index for identifying one of the derived candidates for the intra prediction mode; and determining, based on the obtained index, one of the derived candidates for the intra prediction mode as the intra prediction mode to be used for intra prediction for the decoding target block.12-27-2012
20120263233DATA PROCESSING CIRCUIT - The present invention provides a functional block that executes video coding and video decoding based on H. 264/AVC. The functional block includes two moving picture processing units, and a memory unit that stores therein data related to the results of processing of first plural macroblocks arranged within one row of one picture by the first moving picture processing unit. Data related to the results of processing of plural adjacent macroblocks, which are selected from the data stored in the memory unit, are transferred to the second moving picture processing unit. The second moving picture processing unit performs processing of one macroblock of second plural macroblocks arranged in the following row, using the transferred data.10-18-2012
20120230403Using Multiple Prediction Sets to Encode Extended Unified Directional Intra Mode Numbers for Robustness - An apparatus comprising a codec configured to predict an intra mode for a considered pixel block based on a plurality of coded intra modes for a plurality of adjacent pixel blocks to the considered pixel block, wherein the predicted intra mode and the coded intra modes correspond to a set of intra-frame modes that comprise a plurality of directional intra modes and at least two non-directional intra modes and that are assigned a plurality of corresponding group numbers and group index numbers, and wherein the intra mode is predicted based on the group numbers and group index numbers of the coded intra modes.09-13-2012
20120230400MEAN ABSOLUTE DIFFERENCE PREDICTION FOR VIDEO ENCODING RATE CONTROL - Mean absolute difference (MAD) prediction for video encoding may be provided. Upon receiving a video stream comprising a plurality of quality layers, a first quantization parameter (QP) may be selected for a first frame of the video stream according to a second QP associated with a second frame and a third QP associated with a third frame. The first frame may then be encoded according to the selected first QP.09-13-2012
20120230404VIDEO BITSTREAM TRANSCODING METHOD AND APPARATUS - A video transcoder is disclosed. The video transcoder generally comprises a processor and a video digital signal processor. The processor may be formed on a first die. The video digital signal processor may be formed on a second die and coupled to the processor. The video digital signal processor may have (i) a first module configured to perform a first operation in decoding an input video stream in a first format and (ii) a second module configured to perform a second operation in coding an output video stream in a second format, wherein the first operation and the second operation are performed in parallel.09-13-2012
20120230401BUFFER MANAGEMENT IN VIDEO CODECS - In one example, a video decoder is configured to determine, from data associated with an open decoding refresh (ODR) picture of video data, an identifier for a previous picture of the video data, determine whether the previous picture is currently stored in a reference picture memory, and decode only data for pictures of the video data having display order values that are greater than a display order value of the ODR picture, when the previous picture is not stored in the reference picture memory. In another example, a video encoder is configured to encode an open decoding refresh (ODR) picture, determine a previously coded picture having a display order value less than a display order value of the ODR picture and having a temporal identifier value equal to zero, and signal syntax data for the ODR picture representative of an identifier of the determined previously coded picture.09-13-2012
20110122946ELECTRONIC SYSTEM AND METHOD FOR SELECTIVELY ALLOWING ACCESS TO A SHARED MEMORY - An electronic system, an integrated circuit and a method for display are disclosed. The electronic system contains a first device, a memory and a video/audio compression/decompression device such as a decoder/encoder. The electronic system is configured to allow the first device and the video/audio compression/decompression device to share the memory. The electronic system may be included in a computer in which case the memory is a main memory. Memory access is accomplished by one or more memory interfaces, direct coupling of the memory to a bus, or direct coupling of the first device and decoder/encoder to a bus. An arbiter selectively provides access for the first device and/or the decoder/encoder to the memory based on priority. The arbiter may be monolithically integrated into a memory interface. The decoder may be a video decoder configured to comply with the MPEG-2 standard. The memory may store predicted images obtained from a preceding image.05-26-2011
20110122945METHODS FOR ERROR CONCEALMENT DUE TO ENHANCEMENT LAYER PACKET LOSS IN SCALABLE VIDEO CODING (SVC) DECODING - Methods for concealing Scalable Video Coding (SVC) decoding errors. Lost pictures in the target layer are replaced with up-sampled pictures from a lower layer, such as the base layer. In multiloop decoding applications, lost pictures in the target layer are replaced with corresponding up-sampled pictures from the lower layer. Subsequent target layer pictures in the same Group of Pictures (GOP) are either replaced with corresponding upsampled pictures from the lower layer, or they are decoded with up-sampled pictures from the lower layer used as reference pictures. For single-loop decoding, the bit stream of each layer is buffered, for each GOP, and inspected for errors. If an error is detected in the target layer, the pictures of the highest level layer without an error are decoded and up-sampled and used as the output pictures for the current GOP.05-26-2011
20110002383MOVING IMAGE CODING/DECODING SYSTEM AND MOVING IMAGE CODING APPARATUS AND MOVING IMAGE DECODING APPARATUS USED THEREIN - An image quality/rate control portion 01-06-2011
20120263232METHODS FOR ENCODING AND DECODING IMAGES, CORRESPONDING ENCODING AND DECODING DEVICES AND COMPUTER PROGRAMS - A method is provided for encoding an image represented by a sequence of symbols. The method includes the following steps: defining subsequences within the sequence; and going through the subsequences applying the following sub-steps for a routine subsequence: determining an adjacent routine encoded group including two previously encoded subsequences, one of which belongs to an adjacent encoded group associated with a subsequence that is separate from the routine subsequence; initializing a routine probability of occurrence of a symbol, taking into account two known probabilities of occurrence of the symbol, relating to two previously encoded subsequences of the adjacent routine encoded group; the consecutive entropic encoding of the symbols, and updating the routine probability of occurrence; and storing the routine probability of occurrence after encoding the last symbol.10-18-2012
20120320974Mode Dependent Intra Smoothing Filter Table Mapping Methods for Non-Square Prediction Units - An apparatus comprising a processor configured to determine whether to use an intra smoothing filter for a rectangular prediction unit (PU) based on a lookup table (LUT) used for square PUs, wherein a width of the rectangular PU is not equal to a height of the rectangular PU.12-20-2012
20110026593IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, PROGRAM AND INTEGRATED CIRCUIT - An image processing apparatus (02-03-2011
20110044386METHOD AND APPARATUS FOR ENCODING GROUPS OF PICTURES OF A VIDEO SEQUENCE, EACH OF SAID GROUPS INCLUDING AN INTRA ENCODED PICTURE AND MORE THAN TWO PREDICTED ENCODED PICTURES - In known video coding standards there are basically three types of pictures: I, P and B. Video sequences are usually coded in a group of picture structure wherein several P or B pictures are coded following one I picture. However, this GOP structure has some disadvantages with respect to error resilience and storage medium recording. If a P picture is lost e.g. due to transmission channel error, then the subsequent P pictures can not be reconstructed correctly, and the error will propagate temporally and cause unpleasing artifacts. This GOP structure is designed for forward play only and makes complicated a reverse play operation. According to the invention, a reversible GOP structure is used for the video encoding and decoding. The RGOP structure contains both, a forward encoding chain and a backward encoding chain. Each picture in the RGOP structure is assigned to only one of these chains and the video pictures of adjacent RGOP chains are interleaved.02-24-2011
20120128069IMAGE PROCESSING APPARATUS AND METHOD - The present invention relates an image processing apparatus and method able to realize parallelized or pipelined intra prediction while also improving coding efficiency.05-24-2012
20110235709FRAME DROPPING ALGORITHM FOR FAST ADAPTATION OF BUFFERED COMPRESSED VIDEO TO NETWORK CONDITION CHANGES - A video coding and transmission system may employ techniques for adapting buffered video to network condition changes. Video data may be coded as reference data and non-reference data. According to the embodiments, non-reference frame may be detected in buffered video while awaiting transmission to a network. When network degradation is detected, one or more of the buffered non-reference frames may be dropped when network degradation is detected. Information about the dropped frames may be passed to an encoder for updating buffer parameters for future encoding. In this manner, a video coding system may provide faster responses to changing network conditions than systems without such buffer management techniques.09-29-2011
20110235708Method and System for Detecting Global Brightness Change for Weighted Prediction in Video Encoding - A method of encoding a coding unit of a digital video sequence is provided that includes computing a brightness measure for each region in a plurality of regions in the coding unit, wherein the brightness measure indicates a relative brightness between the region in the coding unit and a corresponding region in a reference coding unit, determining a number of regions in the plurality of regions with significant brightness change by comparing each brightness measure to a region brightness change threshold, detecting whether there is global brightness change in the coding unit by comparing the number of regions to a global brightness threshold, and when global brightness change is detected, computing weighted prediction factors to be used for weighted prediction in encoding the coding unit.09-29-2011
20100232502VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included.09-16-2010
20100232501VIDEO ENCODING/DECODING METHOD AND APPARATUS FOR MOTION COMPENSATION PREDICTION - A video encoding method and apparatus to select one combination, for each block of an input video signal, from a plurality of combinations. Each combination includes a predictive parameter and at least one reference picture number determined in advance for the reference picture. A prediction picture signal is generated in accordance with the reference picture number and predictive parameter of the selected combination. A predictive error signal is generated representing an error between the input video signal and the prediction picture signal. Encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination is included.09-16-2010
20100232499METHOD OF DETERMINING AN IMAGE DISTRIBUTION FOR A LIGHT FIELD DATA STRUCTURE - The invention relates to a method of determining an image distribution (D09-16-2010
20120087410METHOD AND SYSTEM FOR GENERATING A TRANSFORM SIZE SYNTAX ELEMENT FOR VIDEO DECODING - In a video processing system, a method and system for generating a transform size syntax element for video decoding are provided. For high profile mode video decoding operations, the transform sizes may be selected based on the prediction macroblock type and the contents of the macroblock. A set of rules may be utilized to select from a 4×4 or an 8×8 transform size during the encoding operation. Dynamic selection of transform size may be performed on intra-predicted macroblocks, inter-predicted macroblocks, and/or direct mode inter-predicted macroblocks. The encoding operation may generate a transform size syntax element to indicate the transform size that may be used in reconstructing the encoded macroblock. The transform size syntax element may be transmitted to a decoder as part of the encoded video information bit stream04-12-2012
20110293003METHODS AND APPARATUS FOR BIT DEPTH SCALABLE VIDEO ENCODING AND DECODING UTILIZING TONE MAPPING AND INVERSE TONE MAPPING - Methods and apparatus are provided for bit depth scalable video encoding and decoding utilizing tone mapping and inverse tone mapping. An apparatus includes an encoder (12-01-2011
20120320976VIDEO ENCODING DEVICE, VIDEO ENCODING METHOD, VIDEO ENCODING PROGRAM, VIDEO DECODING DEVICE, VIDEO DECODING METHOD, AND VIDEO DECODING PROGRAM - A video encoding device including a region division section for dividing a frame image constituting video data into a plurality of regions as encoding target regions, an encoding section for encoding an image of each region, an inverse transformation section and an addition section for generating reproduced image of the encoded image, a storage section for storing reproduced images, a prediction generation section for searching a region which is highly correlated to a reproduced image of a template region, which is adjacent to the region of the encoding target image in a predetermined positional relationship and is a part of the reproduced image, from the reproduced image, and determining a prediction signal based on the searched region and the above-mentioned positional relationship, and a subtraction section for generating a difference signal between the prediction signal and the encoding target image as a signal for encoding.12-20-2012
20120320977ENCODING/DECODING APPARATUS, IMAGING APPARATUS, AND METHODS FOR CONTROLLING THEREFOR - An encoding method and apparatus which include a coded picture that enables special playback to be easily performed while suppressing reduction in coding efficiency are provided. Coding is performed per a certain number of pictures, including pictures for special playback. When coded pictures for special playback using an interframe predictive coding scheme, referencing is limited to coded pictures encoded using an intraframe predictive coding scheme or coded pictures encoded using the interframe predictive coding scheme having the same reference limitation.12-20-2012
20120320975VIDEO ENCODING DEVICE AND ENCODING METHOD THEREOF, VIDEO DECODING DEVICE AND DECODING METHOD THEREOF, AND DIRECTIONAL INTRA-PREDICTION METHOD TO BE USED THERETO - The present disclosure provides a video encoding apparatus and encoding method thereof, video decoding apparatus and decoding method thereof, and directional intra-prediction method to be used therefor. The video encoding apparatus includes a main mode search unit for searching for main mode for a current block from among directional intra-prediction modes; a sub mode search unit for searching for sub modes formed by inclining indicated orientation of found main mode by main mode search unit by a predetermined offset in both clockwise and counterclockwise directions; a predicted block generator for generating predicted block of the current block from neighboring blocks of the current block based on found main mode by the main mode search unit and found sub modes by the sub mode search unit; a differentiator for calculating differential between the current block and the predicted block; and an encoder for encoding calculated differential by the differentiator.12-20-2012
20120320978CODER OPTIMIZATION USING INDEPENDENT BITSTREAM PARTITIONS AND MIXED MODE ENTROPY CODING - A system, apparatus, and method for encoding a video signal having a plurality of frames including a current frame. The method includes identifying a first block within the current frame; determining at least one predictor token related to the first block; identifying a reference block within the plurality of frames; determining at least one prediction error token derived from a difference between the first block and the reference block; assigning the at least one predictor token to a first bitstream partition; assigning the at least one prediction error token to a second bitstream partition; and selecting a first encoding scheme for the first bitstream partition and a second encoding scheme for the second bitstream partition.12-20-2012
20120328014VIDEO CODING DEVICE, VIDEO CODING METHOD THEREOF, VIDEO DECODING DEVICE, AND VIDEO DECODING METHOD THEREOF - The present disclosure provides a video encoding apparatus and method and a video decoding apparatus and method. The video encoding apparatus, includes: a block mode determiner for determining a block mode of a current block; an NCI block intra encoder responsive if the block mode of the current block determined by the block mode determiner is an intra mode and neighboring blocks of the current block include an NCI block, for encoding the NCI block through an intra prediction of the NCI block; and a current block intra encoder responsive if the block mode of the current block determined by the block mode determiner is the intra mode and the neighboring blocks of the current block include the NCI block, for encoding the current block through an intra prediction of the current block.12-27-2012
20120287998IMAGE PROCESSING APPARATUS AND METHOD - The present invention relates to an image processing apparatus and a method capable of improving the coding efficiency in intra prediction.11-15-2012
20100208807METHOD AND DEVICE FOR AVOIDING ROUNDING ERRORS AFTER PERFORMING AN INVERSE DISCRETE ORTHOGONAL TRANSFORMATION - The present invention provides a method for avoiding rounding errors during rounding of values after performing an inverse discrete orthogonal transformation. In a first step, a block of coefficients (F′[u][v]) is transformed into a block of image pixel values (f′[y][x]) by means of an inverse discrete orthogonal transformation, wherein each image pixel comprises an image pixel value. In a second step, a product of the block of image pixel values (f′[y][x]) with a first pixel pattern (A[y][x]) is calculated. In a third step, the product values of the second step are summed up to a first sum (Sum08-19-2010
20100172412VIDEO ENCODER AND VIDEO DECODER - A video encoder that encodes each of a plurality of blocks obtained by dividing an input image, includes: a definition unit configured to define a valid area which is allowed to be used as reference in a reference image in interframe coding; a detection unit configured to detect a reference area in the reference image for a target block; a predicted image generation unit configured to generate a predicted image by outputting an image of the reference area for the reference area belonging to the valid area and outputting a complementary image for the reference area not belonging to the valid area; and a coding unit configured to encode the input image using the predicted image, wherein valid area information indicating the valid area is transmitted to a video decoder, for each group of a plurality of blocks.07-08-2010
20100202519Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.08-12-2010
20100202518METHOD AND APPARATUS FOR COMPUTING A SLIDING SUM OF ABSOLUTE DIFFERENCES - A logic circuit is configured to calculate a sliding sum of absolute differences of a plurality of numbers from a plurality of members respectively selected successively from all members of a sequence of numbers.08-12-2010
20130010863MERGING ENCODED BITSTREAMS - At least one implementation provides a transcoder for merging two AVC (including, for example, the SVC annex) bitstreams. Various implementations provide advantages such as, for example, avoiding full decoding of at least one bitstream and/or avoiding motion compensation during the coding of an enhancement layer block. One particular implementation includes accessing a first and a second AVC encoding of a sequence of data. The second AVC encoding differs from the first AVC encoding in quality. The particular implementation further includes merging the first AVC encoding and the second AVC encoding into a third AVC encoding that uses the SVC extension of AVC. The merging is performed such that the first and second AVC encodings occupy different layers, and the first layer is a reference layer for the second layer.01-10-2013
20130010864IMAGE DATA COMPRESSION - The techniques directed to data compression are described. In some examples, the techniques may implement a bit budget-based scheme that indicates the available bit budget for a current image data block to achieve the target compression. The techniques may continuously update the bit budget after the compression of the current image data block to determine the bit budget for the next image data block.01-10-2013
20130010867VIDEO COMPRESSION AND ENCODING METHOD - Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X01-10-2013
20130010865REDUCED RESOLUTION PIXEL INTERPOLATION - An offset can be applied to intermediate values obtained while performing an interpolation filtering operation such that applying the offset reduces the bitdepth of the intermediate value. The intermediate value can be stored with the reduced bitdepth, and when retrieved, the offset can be added back such that future calculation can be performed using the intermediate value with the original bitdepth.01-10-2013
20130010866Method of decoding a digital video sequence and related apparatus - A method for rendering an MPEG sequence includes decoding a first picture in the MPEG sequence; reducing a data size of the decoded first picture by quantizing at least one component of the first picture, the quantized component selected from the luminance and chrominance components of the first picture; storing a reduced data size representation of the decoded first picture to a memory; reading a prediction block of the reduced data size representation of the decoded first picture; inverse quantizing the selected component of the prediction block of the reduced data size representation of the decoded first picture to restore the prediction block of the decoded first picture; and decoding a block of a second picture in the sequence according to the restored prediction block of the decoded first picture.01-10-2013
20130010868VIDEO COMPRESSION AND ENCODING METHOD - Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X01-10-2013
20100150235Method and apparatus for decoding/encoding a video signal - A method of decoding a video signal is disclosed. The present invention includes obtaining identification information indicating whether a coded picture of a current NAL unit is an inter-view picture group, obtaining interview reference information of the inter-view picture group, and constructing a reference picture list for inter-view prediction using the inter-view reference information according to the identification information, wherein the inter-view reference information includes view identification information of an inter-view reference picture.06-17-2010
20130016778VIDEO COMPRESSION AND ENCODING METHOD - Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X01-17-2013
20130016780METHOD FOR DECODING MOVING PICTURE IN INTRA PREDICTION MODE - Provided is a method that de-multiplexes a bit stream to extract intra prediction mode information and residual signals, restores an intra prediction mode of a current prediction unit using the intra prediction information and intra prediction modes of prediction units adjacent to the current prediction unit, generates reference pixels using one or more available reference pixel if there exist unavailable reference pixels of the prediction unit, adaptively filters the reference pixels based on the restored intra prediction mode, generates a prediction block using the restored intra prediction mode and the reference pixels, decodes the residual signal to generating a residual block, and generates a reconstructed block using the prediction block and the residual block. Accordingly, additional bits resulted from increase of a number of intra prediction mode are effectively reduced. Also, an image compression ratio can be improved by generating a prediction block similar to an original block.01-17-2013
20130016777Pixel-Based Intra Prediction for Coding in HEVC - An apparatus comprising a processor configured to receive a video frame comprising a current block, wherein the current block comprises a plurality of original pixels, compute a plurality of reconstructed pixels based on the original pixels, and use an intra prediction mode to generate a set of prediction pixels based on a set of reconstructed pixels in the plurality of reconstructed pixels.01-17-2013
20130016779VIDEO COMPRESSION AND ENCODING METHOD - Disclosed herein is a method for decoding a video signal having at least one frame with a plurality of blocks including a current block, including generating, for at least a selected pixel in the current block, a predicted value for at least one pixel located in a row i and a column j of the current block using a processor and according to the following equation: X01-17-2013
20120147956Method and Apparatus for Multi-Threaded Video Decoding - A method and an apparatus for performing multi-threaded video decoding are disclosed. The method takes use of a multi-threaded scheme to process an encoded picture stream on a picture by picture basis. In the method, multiple threads are used for performing video decoding at the same time, such as one thread for the operation of parsing input bits into syntax elements of one picture implemented by the first thread, another thread for the operation of decoding the parsed syntax elements of another picture into pixel values implemented by the second thread, and the other threads for the operations of the non-reference picture, such as bidirectional predictive picture, including parsing input bits into syntax elements and the subsequent operation of decoding the parsed syntax elements into pixel values. Therefore, the decoding speed is substantially increased, and the decoding efficiency is enhanced.06-14-2012
20120147955Mode Adaptive Intra Prediction Smoothing in Video Coding - A method for decoding an encoded video bit stream in a video decoder is provided that includes decoding an intra prediction mode for a block of pixels encoded in the video bit stream, determining, based on the intra prediction mode, whether or not a smoothing filter is to be applied to reference pixel values used for intra prediction of the block, applying a smoothing filter to the reference pixel values when a result of the determining is that a smoothing filter is to be applied, and performing intra prediction according to the intra prediction mode using the smoothed reference pixel values to generate a predicted block of pixels.06-14-2012
20110134998METHOD AND APPARATUS FOR ENCODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION, AND METHOD AND APPARATUS FOR DECODING VIDEO BY MOTION PREDICTION USING ARBITRARY PARTITION - Disclosed is a method and apparatus of encoding a video, the method including: splitting video data into a maximum coding unit; encoding the video data of the maximum coding unit based on deeper coding units of hierarchical structures in which a coding unit of an upper depth is split as a depth deepens, according to at least one split region of the maximum coding unit, and determining a coding depth at which an encoding result is to be output, including inter prediction using partitions obtained by splitting the coding unit according to arbitrary ratios; and outputting a bitstream including the encoded video data corresponding to a coding depth for the at least one split region according to maximum coding units and information regarding the coding depth and encoding modes.06-09-2011
20130022115APPARATUS AND METHOD FOR ENCODING IMAGE - Provided is a moving picture coding apparatus for increasing a compression ratio of a moving picture signal while maintaining high image quality. To minimize the number of bits required for a residual block, quantized transform coefficients are adaptively divided into a plurality of subsets according to a size of a transform block, and non-zero quantized transform coefficients of each subset are scanned and encoded. Also, an intra prediction mode of the current block is determined using reference pixels obtained by filtering reference pixels of the current block. Accordingly, it is possible to minimize the amount of data required for the residual block of the current block.01-24-2013
20130022111CODING MOTION DEPTH MAPS WITH DEPTH RANGE VARIATION - This disclosure describes techniques for coding 3D video block units. In one example, a video encoder is configured to determine a first real-world depth range for a first depth view component comprising a reference view component, determine a second real-world depth range for a second depth view component comprising a current view component, wherein the current view component is predicted relative to the reference view component, determine a predictive block for a portion of the current view component from the reference view component, adjust values of the predictive block based on a difference between the first real-world depth range and the second real-world depth range, and predict the portion of the current view based on the adjusted values of the predictive block.01-24-2013
20130022114METHOD AND RELATED APPARATUSES FOR DECODING MULTIMEDIA DATA - A method for decoding compressed multimedia data is disclosed. At least one performance parameter corresponding to a system environment or a display requirement of the compressed multimedia data is first acquired. A rendering flow for the compressed multimedia data according to the at least one performance parameter is then determined dynamically, wherein the rendering flow comprises a specific arrangement of rendering procedures indicating the execution order of the rendering procedures. Then, the compressed multimedia data is decoded with the determined rendering flow so as to display the decoded data as an image data.01-24-2013
20120243608VIDEO CODING AND DECODING METHOD, AND CODING AND DECODING APPARATUS - The present invention relates to a video coding and decoding method, and coding and decoding apparatus. The coding method includes: generating a second order prediction flag for a coding block; when the coding block needs second order prediction, generating a second order prediction flag for at least one sub-block of the coding block, where the second order prediction flag of the sub-block is used to indicate whether second order prediction is performed on the sub-block; performing prediction according to the second order prediction flag of the coding block and the second order prediction flag of the at least one sub-block of the coding block to obtain a prediction image; and obtaining a prediction residual according to the prediction image, and coding the prediction residual.09-27-2012
20120243607METHOD FOR IMAGE CODING AND DECODING - A method for coding an image divided into sub-regions is described. The coding method comprises the following steps: 09-27-2012
20080253453MOVING PICTURE DISPLAY APPARATUS - A moving picture display apparatus is for displaying, on a liquid crystal panel or the like, moving picture data generated by encoding according to a predictive encoding method. In parallel with picture decoding processing, the moving picture display apparatus finds minimum values and a maximum values of YUV data of a picture being decoded, and when the picture is being displayed, performs backlight control based on an upper bound value of RGB data found from YUV data of the picture.10-16-2008
20080253452Video Encoder Using a Refresh Map - The present invention relates to a video encoder (ENC) for encoding frames (FR) of a video signal before transmission, said video encoder (ENC) including an encoding decision unit (EDU) for deciding which kind of coding will be used for each data of said frame (FR) in an encoding unit (ENU). Said video encoder (ENC) further implements a freshness map calculation unit (FMCU) for calculating, throughout the time, for each data of said frame (FR), a corresponding freshness value (FV) taking into account Intra and Inter prediction mechanisms, independently from a calculation of a distortion. Said freshness value (FV) express on which degree encoded data (ED) are relying on previously transmitted data and said freshness value (FV) is used by said encoding decision unit (EDU).10-16-2008
20080247464METHOD AND APPARATUS FOR ENCODING AND DECODING BASED ON INTRA PREDICTION USING DIFFERENTIAL EQUATION - Provided are a method and apparatus for encoding and decoding an image based on intra prediction. The image encoding method comprises determining boundary values of a differential equation that is to be used to intra-predict a current block based on pixel values of pre-encoded pixels adjacent to the current block, predicting the current block using the differential equation and the boundary values and encoding the current block based on the prediction block of the current block.10-09-2008
20080247463LONG TERM REFERENCE FRAME MANAGEMENT WITH ERROR FEEDBACK FOR COMPRESSED VIDEO COMMUNICATION - An apparatus, software encoded in tangible media, and a method at an encoder. The method includes sending compressed video data including a reference frame message to create a long term reference frame to a plurality of decoders at one or more destination points, receiving feedback from the decoders indicative of whether or not the decoders successfully received the reference frame message, and in the case that the received feedback is such that at least one of the decoders did not successfully receive the reference frame message or does not have the indicated recent frame, repeating sending a reference frame message to create the long term reference frame. Using the method can replaces I-frame error recovery with long term reference frames, even in the case where the reference frame management messages are lost to at least one decoder.10-09-2008
20080240239METHODS AND APPARATUS TO SELECTIVELY REDUCE STREAMING BANDWIDTH CONSUMPTION - Methods and apparatus to selectively transmit compressed data based upon whether a image movement threshold has been met. In one embodiment, edge map frames are transmitted during periods of camera movement. Edge maps generated from a video stream are processed to identify the periods of camera movement.10-02-2008
20090304076MEMORY ARRANGEMENT METHOD AND SYSTEM FOR AC/DC PREDICTION IN VIDEO COMPRESSION APPLICATIONS BASED ON PARALLEL PROCESSING - A memory arrangement method and system for AC/DC prediction in video compression applications based on parallel processing is disclosed. The method and system achieves optimum operating efficiency for data operation and reading based on parallel computing characteristics (Single Instruction Multiple Data (SIMD)) of an operation unit of the system. Additionally, the method transplants a VC-1 video compression system running in an operating system (the Windows operating system, for example) to a system platform using a digital signal processor (DSP) as an operation unit and implements a real-time VC-1 encoder according to parallel computing characteristics of a hardware core of the system platform.12-10-2009
20080232469Rate Control for a Multimedia Compression and Encoding System - A rate controller for allocating a bit budget for video frames to be encoded is disclosed. The rate controller of the present invention considers many different factors when determining the frame bit budget including: desired video quality, target bit rate, frame type (intra-frame or inter-frame), frame duration, intra-frame frequency, frame complexity, intra-block frequency within an intra-frame, buffer overflow, buffer underflow, and the encoded video frame quality for a possible second pass.09-25-2008
20080232468METHOD AND APPARATUS FOR ADAPTIVE GOP STRUCTURE DETERMINATION - A video encoder, determining a Group of Picture (GOP) structure and a method thereof. The video encoder comprises an input frame buffer, an I-frame module and a P-frame module. The input frame buffer receives and stores input frames. The I-frame module coupled to the input frame buffer identifies an I-frame based on a correlation between two consecutive input frames to obtain the GOP size. The P-frame module coupled to the input frame buffer and the I-frame module, determines P-frames in the GOP having the GOP size based on the GOP rate.09-25-2008
20080232467Image Decoding Method - There is provided an image decoding method for decoding a picture to be decoded by referencing an appropriate picture even when random access reproduction is performed. The method includes: a first storage step (S09-25-2008
20100086045VIDEO ENCODING/DECODING METHOD AND APPARATUS - A video encoding method comprises selecting one combination, for each block of an input video signal, from a plurality of combinations each including a predictive parameter and at least one reference picture number determined in advance for the reference picture, generating a prediction picture signal in accordance with the reference picture number and predictive parameter of the selected combination, generating a predictive error signal representing an error between the input video signal and the prediction picture signal, and encoding the predictive error signal, information of the motion vector, and index information indicating the selected combination.04-08-2010
20100086026ADAPTIVE DECIMATION FILTER - An initial decimation filter is applied to an original frame to generate a decimated frame. An optimized prediction filter is extracted from both the decimated frame and the original frame, while the initial decimation filter is held fixed. A predicted from is generated from the optimized prediction filter and the decimated frame, and an optimize decimation filter is extracted from the decimated frame and the predicted frame, while the optimized prediction filter remains fixed.04-08-2010
20100086030VIDEO CODING WITH LARGE MACROBLOCKS - Techniques are described for encoding and decoding digital video data using macroblocks that are larger than the macroblocks prescribed by conventional video encoding and decoding standards. For example, the techniques include encoding and decoding a video stream using macroblocks comprising greater than 16×16 pixels, for example, 64×64 pixels. Each macroblock may be partitioned into two or more partitions, and two or more of the partitions may be encoded using different modes. In one example, an apparatus includes a video encoder configured to receive a video block having a size of more than 16×16 pixels, partition the block into partitions, encode one of the partitions using a first encoding mode, encode another of the partitions using a second encoding mode different from the first encoding mode, and generate block-type syntax information that indicates the size of the block and identifies the partitions and the encoding modes used to encode the partitions.04-08-2010
20100086035METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - The present invention relates to a video signal decoding method for adding an intra prediction mode as a sub-macroblock type to prediction of a macroblock in coding a video signal. The present invention includes obtaining a macroblock type, checking whether a macroblock includes a intra prediction coded sub-macroblock and a inter prediction coded sub-macroblock when a macroblock includes a plurality of coded sub-macroblocks according the macroblock type, when the macroblock includes the ultra prediction coded sub-macroblock and the inter prediction coded sub-macroblock, obtaining prediction mode flag information indicating whether the sub-macroblock is the intra prediction coded or the inter prediction coded, when the sub-macroblock is the intra prediction coded based on the prediction mode flag information, obtaining prediction direction information from a block adjacent to the sub-macroblock and a prediction value of the sub-macroblock based on the prediction direction information, and when the sub-macroblock is inter prediction coded based on the prediction mode flag information, obtaining motion information from the block adjacent to the sub-macroblock and a prediction value of the sub-macroblock based on the motion information. Accordingly, the present invention is able to raise coding efficiency of video signal by adding an intra prediction mode as a sub-macroblock in predicting a macroblock.04-08-2010
20130202034EXPLICIT WAY FOR SIGNALING A COLLOCATED REFERENCE PICTURE FOR VIDEO CODING - In one embodiment, a method for use in encoding and decoding a group of pictures in a video stream is provided. The method identifies a current picture in the group of pictures for encoding or decoding and determines a slice type for the current picture. When the slice type for the current picture is not equal to an I-type, the method identifies a collocated reference picture in the group of pictures using a syntax to determine if a collocated reference picture index should be accessed to identify the collocated reference picture and uses the collocated reference picture to encode or decode the current picture.08-08-2013
20130202035REFERENCE PICTURE LIST MODIFICATION FOR VIDEO CODING - A video coder may, in some cases, signal whether one or more initial reference picture lists are to be modified. When an initial list is to be modified, the video coder can signal information indicating a starting position in the initial reference picture list. When the starting position signaled by the video coder is less than a number of pictures included in the initial reference picture list, then the video coder signals the number of pictures to be inserted into the initial reference picture list, and a reference picture source from which a picture can be retrieved to insert into the initial reference picture list to construct a modified reference picture list.08-08-2013
20080225949VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING PROGRAM, AND VIDEO DECODING PROGRAM - A video processing system is provided with video encoding apparatus 09-18-2008
20080225948Method of Data Reuse for Motion Estimation - A so-called inter-macroblock parallelism is proposed for motion estimation. First, pixel data of one of the consecutive candidate blocks in an overlapped region of search windows of current blocks in a reference frame including reference blocks corresponding to the current blocks are read and transferred to a plurality of processing element (PE) arrays in parallel. The plurality of PE arrays are used to determine the match situation of the current blocks and the reference blocks. Then, the above process is repeated for the rest of the candidate blocks in sequence. For example, if there are four current blocks CB09-18-2008
20080225947QUANTIZATION FOR HYBRID VIDEO CODING - Method for coding a video signal using hybrid coding, comprising: reducing temporal redundancy by block based motion compensated prediction in order to establish a prediction error signal; performing quantization samples of the prediction error signal or on coefficients resulting from a transformation of the prediction error signal into the frequency domain to obtain quantized values, representing quantized samples or quantized coefficients respectively; calculating a quantization efficiency for the quantized values; calculating a zero efficiency for a quantization, when the quantized values are set to zero; selecting the higher efficiency; and maintaining the quantized values or setting quantized values to zero, for further proceeding, depending on the selected efficiency.09-18-2008
20080225946Error Concealment Technique Using Weighted Prediction - A decoder (09-18-2008
20110261880BOUNDARY ADAPTIVE INTRA PREDICTION FOR IMPROVING SUBJECTIVE VIDEO QUALITY - Described herein are apparatus and methods for enhancing perceived visual quality of video which has been coded using enhanced intra predictive coding referred to as boundary adaptive intra predictions (BAIP). BAIP is performed in response to the type of prediction, and the smoothness of the boundary between a current block and its neighboring pixels which have already been coded. Intra prediction is performed separately for each pixel along the left side and/or top side within a current block, which takes into account the pixel itself and multiple pixels along the left and/or top border of that current block. The BAIP technique can be applied for different block sizes, including 4×4, 8×8, and 16×16, and includes vertical, horizontal, and DC intra predictions.10-27-2011
20130170546METHOD OF ADAPTIVE INTRA PREDICTION MODE ENCODING AND APPARATUS FOR THE SAME, AND METHOD OF ENCODING AND APPARATUS FOR THE SAME - Disclosed are a method and an apparatus for intra prediction mode encoding that may increase compression efficiency of intra prediction mode encoding. The intra prediction mode encoding method may include detecting a similarity of a prediction direction of a neighbor block with respect to a current block based on a position of the neighbor block and an intra prediction direction of the neighbor block with respect to the current block, and determining a candidate prediction mode of the current block based on the similarity and the number of candidate intra prediction modes (N). Accordingly, intra encoding performance of an image may be improved by more accurately and efficiently compressing information about an intra prediction mode of a current block by considering local statistics, which is different from a related art in which only global statistics are considered.07-04-2013
20130170547VIDEO TRANSMISSION APPARATUS AND CONTROL METHOD FOR VIDEO TRANSMISSION APPARATUS - Waiting-for-transmission fragments that cannot be transmitted by a transmission unit due to the interruption of transmission by the transmission unit are stored. In accordance with the waiting-for-transmission fragments, a fragment to be transmitted prior to a first fragment including an intra-coded frame is eliminated from the waiting-for-transmission fragments. The transmission unit is controlled so that the first fragment is transmitted at the resumption of transmission.07-04-2013
20130170548VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD AND PROGRAM - The present invention is a video encoding device having: video encoder for encoding an inputted video on the basis of a prediction; reference picture compressor for compressing a reference picture used for the prediction; storage for storing the compressed reference picture; reference picture decompressor for decompressing the compressed reference picture stored in the storage; compression and decompression controller for controlling the reference picture compressor and the reference picture decompressor on the basis of predetermined control information; quantized information encoder for encoding a portion of the control information of the compression and decompression control means by means of a predetermined method and for generating a quantized information bitstream; and multiplexer for multiplexing the video bitstream from the video encoder, at least a portion of the control information excluding the portion that was encoded by means of the quantized information encoder, and the quantized information bitstream.07-04-2013
20130142256CODING LEAST SIGNFICANT BITS OF PICTURE ORDER COUNT VALUES IDENTIFYING LONG-TERM REFERENCE PICTURES - In general, techniques are described for coding picture order count values identifying long-term reference pictures. A video decoding device comprising a processor may perform the techniques. The processor may be configured to determine a number of bits used to represent least significant bits of the picture order count value that identifies a long-term reference picture to be used when decoding at least a portion of a current picture and parse the determined number of bits from a bitstream representative of the encoded video data. The parsed bits represent the least significant bits of the picture order count value. The processor retrieves the long-term reference picture from a decoded picture buffer based on the least significant bits, and decodes at least the portion of the current picture using the retrieved long-term reference picture.06-06-2013
20130142257CODING PICTURE ORDER COUNT VALUES IDENTIFYING LONG-TERM REFERENCE FRAMES - In general, techniques are described for coding picture order count values identifying long-term reference pictures. A video decoding device comprising a processor may perform the techniques. The processor may determine least significant bits (LSBs) of a picture order count (POC) value that identifies a long-term reference picture (LTRP). The LSBs do not uniquely identify the POC value with respect to the LSBs of any other POC value identifying any other picture in a decoded picture buffer (DPB). The processor may determine most significant bits (MSBs) of the POC value. The MSBs combined with the LSBs is sufficient to distinguish the POC value from any other POC value that identifies any other picture in the DPB. The processor may retrieve the LTRP from the decoded picture buffer based on the LSBs and MSBs of the POC value, and decode a current picture of the video data using the retrieved LTRP.06-06-2013
20130142258IMAGE PROCESSING APPARATUS - When identification information of an appending start frame coincides with identification information of the final frame of moving image data of an existing moving image file, an image processing apparatus changes the appending start frame to another frame.06-06-2013
20130142259METHOD OFFOR SIGNALING IMAGE INFORMATION, AND METHOD OFFOR DECODING IMAGE INFORMATION USING SAME - The present invention relates to a method offor signaling information on a prediction mode and to a method of for decoding image information using same. According to the present invention, the method offor signaling prediction mode information, serving according to the present invention, as a method offor signaling image information, includes performing prediction on a current block and signaling the prediction-type information applied to the current block. The signaling of the information includes joint-coding and components of signaling information components constituting the prediction-type information. According to the present invention, overhead may be reduced when information on a prediction is signaled.06-06-2013
20130142260IMAGE CODING METHOD AND IMAGE DECODING METHOD - An image coding method includes obtaining image format information, determining a subsampling method for a luminance signal, storing the subsampling method in a memory, obtaining the subsampling method from the memory, performing subsampling on a luminance signal of a surrounding pixel, calculating a parameter of the linear model using (i) the luminance signal that is subsampled and (ii) chrominance of the surrounding pixel, performing subsampling on the luminance signal of the current block to be coded, and calculating prediction chrominance of the current block to be coded using (i) the parameter of the linear model and (ii) the luminance signal that is subsampled.06-06-2013
20110274168INTRAPREDICTION ENCODING/DECODING METHOD AND APPARATUS - An intraprediction encoding/decoding method and apparatus are provided. The intraprediction encoding method includes forming a flipped reference block by flipping pixels of a reference block used for intraprediction symmetrically with respect to a straight line of a predetermined direction passing through the center of the reference block, and performing intraprediction using the flipped reference block.11-10-2011
20110274167VIDEO CODING SYSTEM USING SUB-CHANNELS AND CONSTRAINED PREDICTION REFERENCES TO PROTECT AGAINST DATA TRANSMISSION ERRORS - A coding technique is disclosed in which frames of a video sequence are assigned to one of a plurality of sub-channels to be transmitted to a decoder. The frames are coded according to predictive coding techniques such that ordinarily prediction references of the frames in each sub-channel only reach the reference frames that occur within the same sub-channel. Thus, if transmission errors arise with respect to one sub-channel, decoding may occur for another sub-channel until the transmission error is detected and corrected.11-10-2011
20110274166Method And Apparatus For Processing Video Signals Using Boundary Intra Coding - A boundary intra coding flag is obtained according to a current macroblock type. When the boundary intra coding flag indicates that the current macroblock is coded in an intra prediction mode using boundary intra coding, boundary coding information is obtained, and a boundary in the current macroblock is induced based on the boundary coding information. Therefore, the regions divided by the boundary can be coded in the intra prediction mode. The accuracy of a predicted pixel value can be improved by performing the intra prediction for regions divided by the boundary. Accordingly, the residual data transmitted to a decoder can be reduced.11-10-2011
20110274165PARAMETER SELECTION METHOD, PARAMETER SELECTION APPARATUS, PROGRAM, AND RECORDING MEDIUM - Provided that a first segment is an earliest time segment included in a discrete time segment, and a second segment is a time segment subsequent to the first segment, a positive second-segment parameter that corresponds to a weakly monotonically increasing function value of an average amplitude of prediction residuals in a time segment including the second segment is used as a parameter for variable length coding of prediction residuals in the second segment. In addition, a value that corresponds to a weakly monotonically increasing function value of the sum of the second-segment parameter and a positive additional value that corresponds to an index representing the prediction effectiveness of time-series signals in the time segment including the second segment is used as a parameter for variable length coding of the prediction residual at a certain discrete time in the first segment.11-10-2011
20110274164METHODS AND APPARATUS FOR TRANSFORM SELECTION IN VIDEO ENCODING AND DECODING - There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block.11-10-2011
20080219348DATA EMBEDDING APPARATUS, DATA EXTRACTING APPARATUS, DATA EMBEDDING METHOD, AND DATA EXTRACTING METHOD - A data embedding apparatus including: a selecting unit for selecting, based upon the second data, a prediction system of calculating a prediction value with respect to data to be processed within the first data; a predicting unit for calculating the prediction value of the data to be processed by the prediction system selected by the selecting unit; a difference calculating unit for calculating a prediction error of the data to be processed by employing the prediction value; and a prediction error calculating unit for outputting the coded data, in which the predicting unit includes: a 0-embedding time predicting unit for performing prediction when a bit value of the second data is “0”; a 1-embedding time predicting unit for performing prediction when the bit value of the second data is “1”; and an embedding end time predicting unit for performing prediction when embedding of the second data is accomplished.09-11-2008
20130177078APPARATUS AND METHOD FOR ENCODING/DECODING VIDEO USING ADAPTIVE PREDICTION BLOCK FILTERING - Provided are a method and apparatus for encoding/decoding video. The method and apparatus of the present invention involve generating a first prediction block for a block to be decoded, calculating a filter coefficient on the basis of the block adjacent to the first prediction block, and performing filtering on the first prediction block using the filter coefficient so as to generate a second prediction block if information relating to the performance of filtering indicates that filtering should be performed. According to the present invention, accuracy in video prediction and encoding performance are improved.07-11-2013
20130177079METHOD FOR PARTITIONING BLOCK AND DECODING DEVICE - Disclosed are a method for partitioning a block and a decoding device. A method for decoding an image comprises the steps of: partitioning one prediction unit, in which an intra prediction is performed in a predetermined intra prediction mode, into a plurality of transform units; and performing the intra prediction for each of the plurality of the transform units on the basis of the predetermined intra prediction mode. Thus, the invention increases the image encoding efficiency.07-11-2013
20130114708SECONDARY BOUNDARY FILTERING FOR VIDEO CODING - In one example, a video coding device is configured to intra-predict a block of video data, using values of pixels along a primary boundary of the block, to form a predicted block, determine whether to filter the predicted block using data of a secondary boundary of the block, and filter the predicted block using data of the secondary boundary in response to determining to filter the predicted block. The video coding device may determine whether to filter the predicted block based on a comparison of a Laplacian value or a gradient difference value to a threshold. The determination of whether to filter the predicted block may be based at least in part on a boundary relationship, e.g., the relationship of one boundary to another, or of a boundary to pixel values of the predicted block.05-09-2013
20130114705MULTIVIEW VIDEO CODING - Aspects of this disclosure relate to a method of coding video data. In an example, the method includes obtaining, from an encoded bitstream and for any view component of a first view, reference view information indicating one or more reference views for predicting view components of the first view. The method also includes including, for decoding a first view component in an access unit and in the first view, one or more reference candidates in a reference picture list, where the one or more reference candidates comprise view components in the access unit and in the reference views indicated by the reference view information, where the number of reference candidates is equal to the number of reference views. The method also includes decoding the first view component based on the one or more reference candidates in the reference picture list.05-09-2013
20130114704Utilizing A Search Scheme for Screen Content Video Coding - A method, a device and computer readable storage media facilitate providing screen content including a plurality of video frames that are displayed by a computing device. During coding of the screen content, a suitable predictor is found that is used to code pixel blocks from one or more frames. The suitable predictor is found by selecting a pixel block of a current frame, conducting a direction based search by comparing pixel blocks within a search window of a reference frame with the selected pixel block of the current frame to determine whether a match exists, and, in response to a determination that no sufficient match has been found, conducting a feature oriented search by comparing pixel blocks of the reference frame with the selected pixel block of the current frame to find a suitable match based upon a common feature.05-09-2013
20130094584ENCODING DEVICE, ENCODING METHOD, DECODING DEVICE, AND DECODING METHOD - The present technology relates to an encoding device and an encoding method, and a decoding device and a decoding method that are capable of reducing the calculation amount of orthogonal transform processing or inverse orthogonal transform processing. A DWT unit (04-18-2013
20130094583MOVING PICTURE CODING METHOD AND MOVING PICTURE DECODING METHOD - According to a picture coding method, a coded picture is stored, as a reference picture, into a storage unit; commands indicating correspondence between reference pictures and reference indices for designating reference pictures and coefficients used for generation of predictive images are generated; a reference picture being used when motion compensation is performed on a current block in a current picture to be coded is designated by a reference index; a predictive image is generated by performing linear prediction on a block being obtained by motion estimation within the designated reference picture, by use of a coefficient corresponding to the reference index; a coded image signal including a coded signal obtained by coding a prediction error being a difference between the current block in the current picture to be coded and the predictive image, the commands, the reference index and the coefficient is outputted.04-18-2013
20130094582VIDEO CODING METHOD AND VIDEO DECODING METHOD - A video coding device codes video data, by performing motion compensation with sub-pel resolution by using an adaptive interpolation filter for calculating a pixel value of a sub pixel for interpolation between full pixels configuring an input image included in the video data. The video coding device includes a motion compensation unit setting a filter property for an adaptive interpolation filter on a predetermined process unit basis, determining, for each of sub-pel positions relative to a full pixel, a plurality of filter coefficients of the adaptive interpolation filter having the set filter property, and performing the motion compensation with sub-pel resolution, by applying the adaptive interpolation filter having the determined filter coefficients to the input image. The video coding device includes a subtraction unit generating a prediction error, by subtracting, from the input image, a prediction image generated in the motion compensation, and a coding unit coding the prediction error.04-18-2013
20130094581MOVING-PICTURE ENCODING APPARATUS AND MOVING-PICTURE DECODING APPARATUS - According to one embodiment, an encoding apparatus includes a prediction unit, a classifying unit, a first transformer, a second transformer, an order controller, and an entropy coder. The prediction unit obtains a predictive residual signal to be encoded, by using a mode selected from intra-prediction modes. The first transformer obtains first transformation coefficients by subjecting the signal to an orthogonal transformation by use of a first transformation basis if the selected mode is classified into a mode having a prediction direction. The first transformation basis is preset so that a coefficient density after the orthogonal transformation is higher than a coefficient density.04-18-2013
20130094580DETECTING AVAILABILITIES OF NEIGHBORING VIDEO UNITS FOR VIDEO CODING - As part of a video encoding or decoding operation on video data, a video coder performs a coding operation for a current video unit of the video data. As part of performing the coding operation for the current video unit, the video coder determines the availabilities of one or more video units that neighbor the current video unit. In order to determine the availability of a video unit that neighbors the current video unit, the video coder identifies, based on availabilities of video units that neighbor a parent video unit of the current video unit, an entry in a lookup table. The identified entry indicates the availability of the video unit that neighbors the current video unit. The video coder then performs a coding operation on the current video unit based on whether the video unit that neighbors the current video unit is available.04-18-2013
20130114714IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD - Provided is an image processing device including a sorting section for sorting pixel values included in an image such that a pixel value of a first pixel of a first sub-block included in a macro block in the image and a pixel value of a second pixel of a second sub-block included in the macro block are in succession, and a pixel value of a third pixel of the first sub-block and a pixel value of a fourth pixel of the second sub-block are in succession; a first prediction section for generating predicted pixel values for the first pixel and the second pixel using the pixel values sorted by the sorting section; and a second prediction section for generating predicted pixel values for the third pixel and the fourth pixel in parallel with processing of the first prediction section, using the pixel values sorted by the sorting section.05-09-2013
20130114706METHOD AND APPARATUS FOR PROCESSING COMPONENTS OF AN IMAGE - A method for processing components of an image for coding a sample of the image, the image being composed of a first type of component and a second type of component, wherein samples of the second type of component are predictable from samples of the first type of component using a prediction model, computing one parameter value for use in representing, in the prediction model, the link between the first type of component and the second type of component; detecting, whether or not, one type of error exists in one such computed parameter value of the prediction model and in the case where a first type of error is detected; adapting the computed parameter value to correct for the error detected; and predicting a sample of the second type from a sample of the first type using the prediction model and the adapted parameter value.05-09-2013
20130114713LOW-COMPLEXITY INTRA PREDICTION FOR VIDEO CODING - The present invention provides a unique intra prediction process which improves the efficiency of video coding. H.264/AVC uses reference pixels in a horizontal boundary located immediately above a target block to be predicted and reference pixels in a vertical boundary located immediately left of the target block. In the present invention, at least some of one of an array of horizontal boundary pixels and an array of vertical boundary pixels are retrieved. Then, the retrieved pixels are added to the other boundary pixels to extend the array thereof. Intra prediction is performed, based solely on the extended array of boundary pixels.05-09-2013
20130114712DECODING DEVICE AND CODING DEVICE - A moving image decoder (05-09-2013
20130114711SYSTEM FOR PARALLEL INTRA-PREDICTION DECODING OF VIDEO DATA - A system for decoding video data includes a processing unit. The processing unit includes a plurality of processing pipelines and a driver. The driver includes a decoder configured to generate a plurality of intermediate control maps containing control information including an indication of which macro blocks or portions of macro blocks may be processed in parallel in the plurality of processing pipelines.05-09-2013
20130114710METHOD AND APPARATUS FOR ENCODING VIDEO BY PREDICTION USING REFERENCE PICTURE LIST, AND METHOD AND APPARATUS FOR DECODING VIDEO BY PERFORMING COMPENSATION USING REFERENCE PICTURE LIST - A video prediction encoding method including setting a default number of reference images assigned to a list combination (LC) reference list in units of pictures, the LC reference list including at least one reference image from among a plurality of reference images included in reference lists L05-09-2013
20130114709IMAGE CODING APPARATUS, IMAGE CODING METHOD, IMAGE DECODING APPARATUS, IMAGE DECODING METHOD, AND STORAGE MEDIUM - An image coding apparatus includes a quantization matrix coding unit configured to code quantization matrices, wherein the quantization matrix coding unit is configured to code a difference between a coefficient to be coded and a coefficient adjacent to the coefficient to be coded, and to use, when coding the difference having a positive value, a coding table that uses a code of a bit number equal to or less than that of a code used to code the difference having a negative value having the same absolute value as the absolute value of the positive value.05-09-2013
20130101029MULTIMEDIA DATA ENCODING - A method of multimedia data encoding and a multimedia data encoding device is provided. The method includes accessing a frame associated with the multimedia data, the frame including a plurality of rows of blocks, each of the plurality of rows including a plurality of blocks. The method also includes reconstructing a first selected block of a first selected row, during a first time slot of a pipeline and a first selected block of a second selected row, during a second time slot of the pipeline. In addition, the method includes determining a first intra prediction mode optimal for intra prediction of the first selected block of the second selected row, during the first time slot of the pipeline, and a second intra prediction mode optimal for intra prediction of a second selected block of the first selected row during the second time slot, based a previously reconstructed block.04-25-2013
20130101032FILTERING MODE FOR INTRA PREDICTION INFERRED FROM STATISTICS OF SURROUNDING BLOCKS - The present invention relates to intra prediction which may be performed during encoding and/or decoding of an image signal. In particular, the present invention relates to intra prediction of a current block, during which filtering is applied to the prediction signal and/or to signal used for the prediction. The filtering is applied in accordance with a decision based on characteristics of image signal included in block(s) spatially adjacent to the current block.04-25-2013
20130101030TRANSMISSION OF VIDEO DATA - In an embodiment, a method of transmitting video data includes at an encoder encoding the video data as a plurality of frames, including reference frames and intermediate frames, at least some of which are encoded based on multiple reference frames; at the encoder maintaining for each frame a current list of reference frames; and transmitting the plurality of frames, each frame being transmitted in association with a current list of reference frames for that frame.04-25-2013
20130101031DETERMINING QUANTIZATION PARAMETERS FOR DEBLOCKING FILTERING FOR VIDEO CODING - A video coder determines a deblocking quantization parameter (QP) value based on at least one of a first QP value and a second QP value. Subsequently, the video coder applies a deblocking filter that is based on the deblocking filter to an edge associated with a first video block. The edge occurs at a boundary between the first video block and a second video block. The first video block is associated with a current coding unit (CU) and the second video block is associated with a neighboring CU. The current CU is included in a first quantization group and the neighboring CU is included in a second quantization group. The first QP value is defined for the first quantization group. The second QP value is defined for the second quantization group.04-25-2013
20130101037VIDEO ENCODING DEVICE, VIDEO DECODING DEVICE, VIDEO ENCODING METHOD, VIDEO DECODING METHOD, AND PROGRAM - A video encoding device includes: pixel bit length increasing means for increasing a pixel bit length of an input image based on pixel bit length increase information; transform means for transforming output data of the pixel bit length increasing means; entropy encoding means for entropy-encoding output data of the transform means; non-compression encoding means for non-compression-encoding input data; multiplexed data selection means for selecting output data of the entropy encoding means or output data of the non-compression encoding means; and multiplexing means for multiplexing the pixel bit length increase information in a bitstream, wherein a pixel bit length of an image corresponding to the output data of the entropy encoding means and a pixel bit length of an image corresponding to the output data of the non-compression encoding means are different from each other.04-25-2013
20130114707INTRA-MODE VIDEO CODING - This disclosure relates to methods and apparatus for encoding and decoding video data. In an example an intra-mode for predicting a current block of video data and most probable intra-modes (MPMs) for predicting the current block of video data may be determined. MPMs for predicting the current block of video data may be determined. An index for each of the MPMs based on an order in which the intra-mode for predicting the current block is compared to the MPMs may be determined. When one of the MPMs for predicting the current block matches the intra-mode for predicting the current block, the index of the matching MPM.05-09-2013
20130101034IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image coding method includes: writing, into a coded bitstream, buffer description defining information for defining a buffer description; constructing a default reference list; reorder pictures included in the default reference list; writing, into the coded bitstream, reference list reordering information for indicating details of the reordering; and coding an image using the buffer description and a reference list resulting from the reordering, and in the reference list reordering information, among the pictures, a picture to be reordered is specified using an index which is used in other processing in the image coding method.04-25-2013
20130101033CODING NON-SYMMETRIC DISTRIBUTIONS OF DATA - This disclosure describes techniques for coding non-symmetric distributions of data and techniques for quantization matrix compression. The techniques for coding non-symmetric distributions of data may use a mapping that is configured to bias either positive data values or negative data values of a signed integer source towards shorter codewords of a variable length code that codes non-negative integers. This may allow signed integer data sources that have non-symmetric distributions of data to be coded in a more efficient manner. The quantization matrix compression techniques of this disclosure may use a predictor that is configured to generate prediction residuals for a quantization matrix that are skewed in favor of positive values. This may allow entropy coding techniques that favor data distributions which are skewed toward positive data values (e.g., the techniques for coding non-symmetric distributions described above) to be used to increase the coding efficiency of the quantization matrix.04-25-2013
20130101035GROUPING OF TILES FOR VIDEO CODING - Techniques described herein for coding video data include techniques for coding pictures partitioned into tiles, in which each of the plurality of tiles in a picture is assigned to one of a plurality of tile groups. One example method for coding video data comprising a picture that is partitioned into a plurality tiles comprises coding video data in a bitstream, and coding, in the bitstream, information that indicates one of a plurality of tile groups to which each of the plurality of tiles is assigned. The techniques for grouping tiles described herein may facilitate improved parallel processing for both encoding and decoding of video bitstreams, improved error resilience, and more flexible region of interest (ROI) coding.04-25-2013
20130101038Predicted Reference Information Generating Method, Video Encoding and Decoding Methods, Apparatuses Therefor, Programs Therefor, and Storage Media Which Store the Programs - When video images are processed by applying temporal or spatial interframe prediction encoding to each divided area, and generating a predicted image of a processing target area based on a reference frame of the processing target area and reference information which indicates a predicted target position of the processing target area in the reference frame, predicted reference information is generated as predicted information of the reference information. Reference information used when an area adjacent to the processing target area was processed is determined as predicted reference information prediction data used for predicting the reference information of the processing target area. Reference area reference information is generated using one or more pieces of reference information used when a reference area indicated by the prediction data was processed. The predicted reference information prediction data is updated using the reference area reference information. The predicted reference information is generated using one or more pieces of the updated predicted reference information prediction data.04-25-2013
20130121414IMAGE INTRA-PREDICTION MODE ESTIMATION DEVICE, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE, AND ENCODED IMAGE DATA - A coding device and a decoding device are configured to include an estimated prediction mode deciding section (05-16-2013
20130121410Method and Apparatus of Video Encoding with Partitioned Bitstream - A method and apparatus for video encoding to generate a partitioned bitstream without buffering transform coefficient and/or prediction data for subsequent coding units are disclosed. An encoder incorporating an embodiment according to the present invention receives first video parameters associated with a current coding unit, wherein no first video parameters associated with subsequent coding units are buffered. The encoder then encodes the first video parameters to generate a current first compressed data corresponding to the current coding unit. A first memory address in the first logic unit is determined and the encoder provides the current first compressed data at the first memory address in the first logic unit.05-16-2013
20130121413CARRIAGE OF SEI MESSAGES IN RTP PAYLOAD FORMAT - A system and method of modifying error resiliency features by conveying temporal level 0 picture indices, such as t10_pic_idx, within an SEI message instead of optionally including them in the NAL unit header is provided. In addition, a mechanism is provided for enabling repetition of any SEI messages in Real-Time Transport Protocol (RTP) packets. Enabling such repetition of any SEI messages facilitates detection of lost temporal level 0 pictures on the basis of any received packet.05-16-2013
20110268188BLOCK MODE ENCODING/DECODING METHOD AND APPARATUS, AND METHOD AND APPARATUS FOR IMAGE ENCODING/DECODING USING THE SAME - The present disclosure relates to method and apparatus for block mode encoding/decoding and a method and apparatus for video encoding/decoding using the same. The disclosure provides a block mode encoding apparatus that predicts the block mode of a current block and encodes the block mode of the current block depending on whether the block mode of the current block is same as the block mode predicted, to output encoded mode information. The disclosure can reduce the quantity of bits used to encode information on the block mode, thus enhancing the efficiency of video compression.11-03-2011
20130128972IMAGE ENCODING APPARATUS AND IMAGE DECODING APPARATUS - According to one embodiment, an image encoding apparatus includes a setting unit configured to set a combination of a vertical transform matrix and a horizontal transform matrix corresponding to the target image. The combination includes any of a plurality of transform matrices including a first transform matrix and a second transform matrix which increases a coefficient density compared to the first transform matrix if a one-dimensional orthogonal transformation in a direction orthogonal to a line of a group of reference pixels on at least one line is performed on the prediction error in the intra-prediction mode in which the group of reference pixels is referenced to generate an intra-prediction image.05-23-2013
20130128968Method for predicting a shape of an encoded area using a depth map - A method for predicting a shape of an encoded area using a depth map. The method includes synthesizing a virtual depth map and identifying disoccluded regions in the virtual depth map, wherein the disoccluded regions provide a predicted a shape of an area under compression.05-23-2013
20130128967EXPLICIT WAY FOR SIGNALING A COLLOCATED PICTURE FOR HIGH EFFICICENCY VIDEO CODING (HEVC) - A system is provided for determining a collocated reference picture to enable encoding and decoding of a current picture for high efficiency video coding (HEVC). The collocated picture is identified by accessing syntax that can include an index for a list05-23-2013
20130128965INSIDE VIEW MOTION PREDICTION AMONG TEXTURE AND DEPTH VIEW COMPONENTS - The techniques of this disclosure may be generally related to using motion information for a corresponding block from a texture view component that corresponds with a block in a depth view component in coding the block in the depth view component. In some examples, for coding purposes, the techniques may use motion information when the spatial resolution of the texture view component is different than the spatial resolution of the depth view component.05-23-2013
20130128964REFERENCE MODE SELECTION IN INTRA MODE CODING - A video coder can determine a first most probable intra prediction mode and a second most probable intra prediction mode for a current video block, and based on the first and second most probable intra prediction modes, determine an estimate of an actual intra prediction mode used to code the current video block. The estimate of the actual intra prediction mode can be determined by selecting one of the first most probable mode and the second most probable mode as the estimate of the actual intra prediction in response to both the first most probable mode and the second most probable mode being different angular prediction modes. The estimate of the actual intra prediction mode plus difference information can be used to identify the actual intra prediction mode used to code the current video block.05-23-2013
20130177077Method, Apparatus and Computer Program Product for Encoding Video Data - According to various embodiments, a method for encoding video data, and a corresponding apparatus and computer program product. The method includes: applying one of a first transform and a second transform to at least one row of a pixel block, and applying one of the first transform and the second transform to at least one column of the pixel block, based on a prediction mode of the pixel block, to transform between residual pixel values of the pixel block and residual transform coefficients of the pixel block. The method also includes: encoding the residual transform coefficients of the pixel block to generate encoded video data.07-11-2013
20130128970EXPLICIT WAY FOR SIGNALING A COLLOCATED PICTURE FOR HIGH EFFICICENCY VIDEO CODING (HEVC) USING A SINGLE REFERENCE LIST - A system is provided for determining a collocated reference picture to enable encoding and decoding of a current picture for high efficiency video coding (HEVC). The collocated picture is identified by accessing syntax that can include an index for a list05-23-2013
20130121412VIDEO ENCODING METHOD, VIDEO DECODING METHOD, VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING PROGRAM, AND VIDEO DECODING PROGRAM - A video processing system is provided with video encoding apparatus 05-16-2013
20080198928INFORMATION PROCESSING APPARATUS AND INTER-PREDICTION MODE DETERMINING METHOD - According to one embodiment, an information processing apparatus includes an inter-prediction unit which generates a prediction signal, a transformation unit which orthogonal transform a prediction residual signal between the prediction signal and a picture signal of the macro block, and an inter-prediction mode determining unit which determines a combination of an inter-prediction mode used by the inter-prediction unit and DCT used by the transformation unit for each macro block. The inter-prediction mode determining unit includes a first selection unit which selects a preset number of inter-prediction modes from plural types of inter-prediction mode with a specified type of DCT, and a second selection unit which selects a combination of one inter-prediction mode and one DCT from the preset number of inter-prediction modes selected by the first selection unit and the plural types of DCT.08-21-2008
20110249738MOVING IMAGE ENCODING APPARATUS, MOVING IMAGE DECODING APPARATUS, MOVING IMAGE ENCODING METHOD, MOVING IMAGE DECODING METHOD, MOVING IMAGE ENCODING PROGRAM, MOVING IMAGE DECODING PROGRAM, AND MOVING IMAGE ENCODING/ DECODING SYSTEM - In order to improve the encoding efficiency while avoiding an increase in the size or memory band of a frame memory and having adaptability in the encoding/decoding processing of a moving picture, a bit length extension converter converts a target picture having a bit length N into an extended target picture having a bit length M, a compressor encodes the converted picture, and an expander restores the encoded picture. Then, a bit length reduction converter converts the picture into a reproduction picture having a bit length L smaller than the bit length M, and this reproduction picture is stored in a frame memory as a reference picture.10-13-2011
20130148721Reference Frame Management for Screen Content Video Coding Using Hash or Checksum Functions - Techniques are provided for reference frame management for screen content video coding using hash or checksum functions. A video data stream including a plurality of frames is received, each frame including a plurality of pixels that define content within the frame. A plurality of hash code values associated with partitioned portions of a current frame are determined, where each hash code value is determined as an output value from a hash or checksum function based upon an input value comprising pixel values for a corresponding partition within the current frame. The current frame is compared with a plurality of reference frames based upon a comparison of the hash code values of the current frame with hash code values of the reference frames. A reference frame is selected as a candidate reference frame for coding the current frame.06-13-2013
20130148722REFERENCE PICTURE LIST MODIFICATION FOR VIEW SYNTHESIS REFERENCE PICTURES - A video encoder generates a bitstream that includes a reference picture list modification (RPLM) command. The RPLM command belongs to a type of RPLM commands for inserting short-term reference pictures into reference picture lists. The RPLM command instructs a video decoder to insert a synthetic reference picture into the reference picture list. The video decoder decodes, based at least in part on syntax elements parsed from the bitstream, one or more view components and generates, based at least in part on the one or more view components, the synthetic reference picture. The video decoder modifies, in response to the RPLM commands, a reference picture list to include the synthetic reference picture. The video decoder may use one or more pictures in the reference picture list as reference pictures to perform inter prediction on one or more video blocks of a picture.06-13-2013
20130148723Block Error Compensating Apparatus Of Image Frame And Method Thereof - An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.06-13-2013
20130148724Block Error Compensating Apparatus Of Image Frame And Method Thereof - An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.06-13-2013
20130148725Block Error Compensating Apparatus Of Image Frame And Method Thereof - An apparatus and method are provided for compensating a block error in an image frame. This may include a video codec decoder for decoding an inputted image frame, and outputting a decoded image frame. An error concealment block may detect an error-generated block in the decoded image frame and compensate the detected error block through a median filter, and output the compensated image frame.06-13-2013
20130148726METHOD AND APPARATUS FOR ENCODING AND DECODING BASED ON INTRA PREDICTION - Methods and apparatuses for encoding and decoding based on intra prediction. The method of encoding an image based on intra prediction comprises dividing a current block into a plurality of sub blocks so that a plurality of unit blocks adjacent to each other are included in one of the sub blocks based on an intra prediction direction of each of the unit blocks included in the current block, and performing intra prediction encoding on each of the sub blocks so that only information about one intra prediction direction is encoded in each of the sub blocks.06-13-2013
20130148727METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed is a method of encoding a video, the method including: splitting a current picture into at least one maximum coding unit; determining a coded depth to output a final encoding result according to at least one split region obtained by splitting a region of the maximum coding unit according to depths, by encoding the at least one split region, based on a depth that deepens in proportion to the number of times the region of the maximum coding unit is split; and outputting image data constituting the final encoding result according to the at least one split region, and encoding information about the coded depth and a prediction mode, according to the at least one maximum coding unit.06-13-2013
20130148728METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed is a method of encoding a video, the method including: splitting a current picture into at least one maximum coding unit; determining a coded depth to output a final encoding result according to at least one split region obtained by splitting a region of the maximum coding unit according to depths, by encoding the at least one split region, based on a depth that deepens in proportion to the number of times the region of the maximum coding unit is split; and outputting image data constituting the final encoding result according to the at least one split region, and encoding information about the coded depth and a prediction mode, according to the at least one maximum coding unit.06-13-2013
20130148729IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING DEVICE, AND IMAGE DECODING DEVICE - An image coding method according to the present invention partitions an input image signal into processing units, and codes the partitioned image to generate a code sequence, the image coding method including: determining a partitioning pattern for hierarchically partitioning the input image signal in order starting from a largest unit of the processing units; generating partition information indicative of the partitioning pattern; and coding partition information, wherein the partition information includes maximum used hierarchy depth information indicative of a maximum used hierarchy depth which is a hierarchy depth of a deepest processing unit of the processing units included in the partitioning pattern.06-13-2013
20130148720SELECTIVE MIRRORING OF MEDIA OUTPUT - According to some aspects, this disclosure describes techniques for mirroring native media output of a source device via a different destination device. According to the techniques described herein, the source device may control the destination device to the media via an output interface associated with the destination device. The source device may receive a media element of the native media. In response to receiving the native media element, the source device may determine whether to output (mirror) the native media including the media element based on at least one parameter associated with the media element. According to other aspects, this disclosure describes techniques for preventing at least one media element from being mirrored via a destination device operating to mirror other native media. As one example, the source device may change how the source device encodes at least one region associated with the media element, in order to freeze media output associated with the at least one region.06-13-2013
20100284462METHODS AND SYSTEMS FOR SIGNIFICANCE COEFFICIENT CODING IN VIDEO COMPRESSION - A method for decoding significance coefficients in an encoded video sequence is described. An encoded video bitstream is received. Codebook table information is retrieved from the bitstream. Significance symbols are decoded using the retrieved codebook table information. Significance coefficients are decoded using the significance symbols. A plurality of transform coefficients is dequantized. An inverse transform is applied to a residual signal. A video sequence is constructed. A method for coding significance coefficients in a video sequence is also described.11-11-2010
20100290525METHOD AND APPARATUS FOR ENCODING AND DECODING AT LEAST ONE IMAGE FRAME THAT IS ARTIFICIALLY INSERTED INTO IMAGE SEQUENCE - Provided are a method and apparatus for encoding and decoding at least one image frame artificially inserted by a user among a plurality of image frames of an image sequence by using a parameter regarding characteristics of the image frame.11-18-2010
20090028242IMAGE DATA TRANSMITTING APPARATUS AND METHOD AND IMAGE DATA REPRODUCING APPARATUS AND METHOD - An image data transmitting apparatus and an image data transmitting method are provided which can distribute streaming moving images at a transfer rate in accordance with a transmission band with degradation in image quality being mitigated even at the time of congestion. A priority determining section 01-29-2009
20120275517DEPENDENCY PARAMETER SET FOR SCALABLE VIDEO CODING - System and methods for video decoding include receiving at least one Dependency Parameter Set (DPS); and determining at least one inter-layer dependency based on the received DPS. Systems and methods for video encoding include selecting a layering structure; encoding at least one Dependency Parameter Set (DPS) including a representation of the layering structure in a binary format; and including the encoded DPS in a bitstream or sending the encoded DPS out of band.11-01-2012
20120275516IMAGE DECODING DEVICE, IMAGE CODING DEVICE, METHODS THEREOF, PROGRAMS THEREOF, INTEGRATED CIRCUITS THEREOF, AND TRANSCODING DEVICE - An image decoding device (C11-01-2012
20100316123MOVING IMAGE CODING DEVICE, IMAGING DEVICE AND MOVING IMAGE CODING METHOD - A moving image coding device for performing inter-frame prediction coding can prevent memory traffic for reference images from increasing due to increase of an image size. The moving image coding device comprises a multiple frame parallel processing inter-frame prediction coding unit 12-16-2010
20100316122MULTIVIEW VIDEO CODING OVER MPEG-2 SYSTEMS - A multiplexer may produce an MPEG-2 (Motion Picture Experts Group) System standard bitstream comprising views with nonconsecutive view order indexes. In one example, an apparatus comprises a video encoder that encodes a plurality of views of a scene, a multiplexer that constructs a data structure for signaling that a corresponding MPEG-2 (Motion Picture Experts Group) System standard bitstream comprises a first view of the plurality of views of the scene associated with a first view order index and a second view of the plurality of views of the scene associated with a second view order index, wherein the first view order index and the second view order index are non-consecutive, and an output interface that outputs the data structure.12-16-2010
20100316121MULTI-VIEW VIDEO CODING/DECODING METHOD - A multi-view video coding method includes the following steps: an un-coded group of pictures (GOP) is obtained from an un-coded multi-view video. Wherein, the un-coded GOP includes picture sets of several un-coded views. Several present coding views are selected from the un-coded views according to view levels of the un-coded views. Wherein, picture sets of the present coding views includes several present coding pictures. A target coding picture is selected from the present coding pictures according to view levels of and temporal levels of the present coding pictures. At least a coded reference picture, which is referenced by the target coding picture for prediction, is obtained. The target coding picture is coded according to the coded reference picture. In addition, a multi-view video decoding method is also disclosed.12-16-2010
20130156101HARDWARE-ACCELERATED DECODING OF SCALABLE VIDEO BITSTREAMS - In various respects, hardware-accelerated decoding is adapted for decoding of video that has been encoded using scalable video coding. For example, for a given picture to be decoded, a host decoder determines whether a corresponding base picture will be stored for use as a reference picture. If so, the host decoder directs decoding with an accelerator such that the some of the same decoding operations can be used for the given picture and the reference base picture. Or, as another example, the host decoder groups encoded data associated with a given layer representation in buffers. The host decoder provides the encoded data for the layer to the accelerator. The host decoder repeats the process layer-after-layer in the order that layers appear in the bitstream, according to a defined call pattern for an acceleration interface, which helps the accelerator determine the layers with which buffers are associated.06-20-2013
20130156102METHOD AND APPRATUS TO PRIORITIZE VIDEO INFORMATION DURING CODING AND DECODING - A method and apparatus prioritizing video information during coding and decoding. Video information is received and an element of the video information, such as a visual object, video object layer, video object plane or keyregion, is identified. A priority is assigned to the identified element and the video information is encoded into a bitstream, such as a visual bitstream encoded using the MPEG-4 standard, including an indication of the priority of the element. The priority information can then be used when decoding the bitstream to reconstruct the video information06-20-2013
20120281755METHOD AND APPARATUS FOR ENCODING VIDEO, AND METHOD AND APPARATUS FOR DECODING VIDEO - Disclosed are method and apparatus for encoding and decoding an image which divides a current picture into blocks with various sizes and varies a number of intra prediction modes according to the sizes of the divided blocks.11-08-2012
20130182763VIDEO ENCODING APPARATUS, DECODING APPARATUS AND VIDEO ENCODING METHOD - According to one embodiment, a video encoding apparatus includes a controller, a loop filter processor, a interpolation filter, a generator, a transform unit, a quantizer, an encoder. The interpolation filter processor directly calculates, if motion compensation prediction of quarter pixel precision is performed, a sub-pixel value of a sub-pixel displaced from an integer-pixel by a quarter pixel in a horizontal direction or a vertical direction based on integer-pixel values of a reproduction image signal, and to generate a reference image including a integer-pixel and a sub-pixel.07-18-2013
20130182765In-loop Filtering for Lossless Coding Mode in High Efficiency Video Coding - An apparatus comprising a processor configured to generate a reconstructed pixel, selectively bypass at least one in-loop filter on the reconstructed pixel, and generate a prediction pixel for a current pixel using at least the reconstructed pixel when the at least one in-loop filter is bypassed.07-18-2013
20110305277SYSTEM AND METHOD FOR CONTENT ADAPTIVE CLIPPING - A system and method of content adaptive pixel intensity processing are described. In video processing system, due to various mathematic operations applied to the data, the processed video data may be become exceeding a range of original data and result in artifacts. Content adaptive clipping method is disclosed which takes into account the dynamic characteristics of the video data. Accordingly the method configures the video data into a predefined set which can be a partial picture, a frame or a group of frames. The data range of the original associated with the predefined set is determined The processed video data is clipped according to the range computed for the predefined set.12-15-2011
20110310968METHOD AND APPARATUS FOR DETERMINING A SECOND PICTURE FOR TEMPORAL DIRECT-MODE BLOCK PREDICTION - A method for determining a first and a second reference picture used for inter-prediction of a macroblock, comprising the steps of (A) finding a co-located picture and block, (B) determining a reference index, (C) mapping the reference index to a lowest valued reference index in a current reference list and (D) using the reference index to determine the second reference picture.12-22-2011
20110310967Method and System for Video and Image Coding Using Pattern Matching for Intra-Prediction - A method and system are provided in which a device can determine, for a current block of pixels, a first intra-prediction based on reconstructed neighboring pixels and a second intra-prediction based on a pattern match with a reconstructed block of pixels. One of the two intra-predictions may be selected to generate a compressed bit stream comprising information of the current block of pixels. The intra-prediction selection may be performed on a block-by-block basis. An indication may be generated as to which of the two intra-predictions was selected for a particular block of pixels. When pattern matching is selected, a positional relationship of the reconstructed block of pixels with the matching pattern may be encoded and embedded into the compressed bit stream. The same device or another device may be operable to receive a compressed bit stream comprising intra-prediction selection and/or positional relationship information to reconstruct a current block of pixels.12-22-2011
20110310966SYNTAX ELEMENT DECODING - Techniques for efficient syntax element decoding in a system employing context-based adaptive binary arithmetic decoding are disclosed herein. In some embodiments, a video decoding system includes a context-based adaptive binary arithmetic code (“CABAC”) decoder. The decoder includes a processor and decode logic executed by the processor. The decode logic is configured to decompress a CABAC encoded syntax element. The decode logic includes a table embodying a set of rules that determine whether syntax element decoding is complete based on table addressing derived from a decoded syntax element binary value.12-22-2011
20130188698COEFFICIENT LEVEL CODING - In one example, a device includes a video coder configured to code a first set of syntax elements for the coefficients of a residual block of video data, and code, using at least a portion of the first set of syntax elements as context data, a second set of syntax elements for the coefficients, wherein the first set of syntax elements each correspond to a first type of syntax element for the coefficients, and wherein the second set of syntax elements each correspond to a second, different type of syntax element for the coefficients. For example, the first set of syntax elements may comprise values indicating whether the coefficients are significant (that is, have non-zero level values), and the second set of syntax elements may comprise values indicating whether level values for the coefficients have absolute values greater than one.07-25-2013
20130188708Multi-View Encoding and Decoding Technique Based on Single-View Video Codecs - A technique for encoding and decoding data pertaining to multiple video views is presented. A method embodiment of the encoding technique comprises the steps of providing first picture stream belonging to a first view and performing a first encoding operation to encode a picture of the first picture stream. The first encoding operation is based on a single-view video codec and provides encoder state information relevant for the encoding of another picture of the first picture stream. Also provided is a second picture stream belonging to a second video view. A second encoding operation is performed to encode a picture of the second picture stream based on the single-view video codec, wherein the second encoding operation is based on the encoder state information provided by the first encoding operation. On the basis of the encoded picture of the first picture stream and encoded picture of the second picture stream, dedicated video streams are generated.07-25-2013
20130188707IMAGE ENCODING METHOD AND APPARATUS, IMAGE DECODING METHOD AND APPARATUS, AND PROGRAMS THEREFOR - When the entire image is divided into regions, each of which is subjected to predictive encoding while predicting an image signal by using an independent method assigned to the region, the object number and a representative pixel value for each object are predicted utilizing spatial continuity for the presence of the object, and also using decoded pixel values of a previously-processed neighbor region adjacent to a processing region. Accordingly, it is possible to reduce the amount of code required for encoding the object number in the processing region or the pixel value as a representative of each object in the processing region, where these encoded items are required in highly accurate image signal prediction which can handle any object shape by utilizing the pixel value as a representative of each object in the processing target region and information for identifying the object assigned to each pixel in the processing region. Therefore, efficient image encoding can be implemented. Since the employed decoded pixel values of pixels in a previously-decoded neighbor region are common information between the encoding and decoding sides, appropriate prediction can be performed even in the case where one of multiple image signal prediction modes is selected for each region, like in H.264.07-25-2013
20130188706MOVING IMAGE ENCODING DEVICE, MOVING IMAGE DECODING DEVICE, MOVING IMAGE CODING METHOD, AND MOVING IMAGE DECODING METHOD - When carrying out an intra-frame prediction process to generate an intra prediction image by using an already-encoded image signal in a frame, an intra prediction part 07-25-2013
20130188705Simplification of LM Mode - A video codec comprising a processor configured to compute an average of a plurality of reconstructed chroma samples located in neighboring blocks of a chroma block and adjacent to the chroma block, compute an intermediate variable by applying an integer function on the average of the reconstructed chroma samples, and generate a predicted chroma sample for the chroma block based on the intermediate variable.07-25-2013
20130188704Scalable Prediction Type Coding - A method for encoding a video sequence is provided that includes signaling in the compressed bit stream that a subset of a plurality of partitioning modes is used for inter-prediction of a portion of the video sequence, using only the subset of partitioning modes for prediction of the portion of the video sequence, and entropy encoding partitioning mode syntax elements corresponding to the portion of the video sequence, wherein at least one partitioning mode syntax element is binarized according to a pre-determined binarization corresponding to the subset of partitioning modes, wherein the pre-determined binarization differs from a pre-determined binarization for the least one partitioning mode syntax element that would be used if the plurality of partitioning modes is used for inter-prediction.07-25-2013
20130188703Reference Pixel Reduction for Intra LM Prediction - A video codec comprising a processor configured to generate a prediction block for a chroma block, wherein the prediction block comprises a predicted chroma sample, wherein the predicted chroma sample is based on a filtered reconstructed luma sample located in a corresponding reconstructed luma block, a plurality of downsampled filtered reconstructed luma samples located in positions neighboring the corresponding reconstructed luma block, and a plurality of downsampled chroma samples located in positions neighboring the chroma block.07-25-2013
20130188702Simplification of Mode Dependent Intra Smoothing - An apparatus comprising a processor configured to determine whether to apply an intra smoothing filter for a prediction unit (PU) based on a lookup table (LUT), wherein the LUT comprises data indicating the intra smoothing filter should not be applied for any PU with a block size of 8×8 pixels and associated with directional prediction mode. The disclosure also includes a method comprising generating reference samples, determining a size of a PU block, and selecting the reference samples based on PU block size, wherein filtered reference samples are not selected for PU blocks with a size of 8×8 pixels and associated with directional prediction mode.07-25-2013
20130188701SUB-BLOCK LEVEL PARALLEL VIDEO CODING - The techniques of this disclosure are generally related to parallel coding of video units that reside along rows or columns of blocks in largest coding units. For example, the techniques include removing intra-prediction dependencies between two video units in different rows or columns to allow for parallel coding of rows or columns of the video units.07-25-2013
20130188700CONTEXT ADAPTIVE ENTROPY CODING WITH A REDUCED INITIALIZATION VALUE SET - Techniques for coding data, such as, e.g., video data, include coding a first syntax element, conforming to a particular type of syntax element, of a first slice of video data, conforming to a first slice type, using an initialization value set. The techniques further include coding a second syntax element, conforming to the same type of syntax element, of a second slice of video data, conforming to a second slice type, using the same initialization value set. In this example, the first slice type may be different from the second slice type. Also in this example, at least one of the first slice type and the second slice type may be a temporally predicted slice type. For example, the at least one of the first and second slice types may be a unidirectional inter-prediction (P) slice type, or a bi-directional inter-prediction (B) slice type.07-25-2013
20130188696Reduced Look-Up Table for LM Mode Calculation - A video codec comprising a processor configured to generate a prediction block for a chroma block, wherein the prediction block comprises a plurality of predicted chroma samples, wherein each of the plurality of predicted chroma samples is based on a first plurality of reconstructed luma samples located in a corresponding reconstructed luma block, a second plurality of reconstructed luma samples located in neighboring blocks of the corresponding reconstructed luma block, and a look-up table, wherein an index of the look-up table is based on the second plurality of reconstructed luma samples, wherein an index of the look-up table has less than 63 values.07-25-2013
20130188699CODING OF COEFFICIENTS IN VIDEO CODING - A video encoder performs multiple coding passes on coefficients in a coefficient block. During each coding pass, the video encoder encodes a different set of syntax elements for coefficients in the coefficient block. A video decoder uses the syntax elements for a coefficient to determine the value of the coefficient. When the video encoder performs a coding pass, the video encoder selects a coding context for a syntax element based at least in part on a syntax element generated in an earlier coding pass for a non-causal coefficient and based at least in part on a value of a syntax element generated during the current coding pass for a causal coefficient. The video encoder entropy encodes the syntax element based on the selected coding context. A video decoder performs a similar series of coding passes in which the video decoder selects coding contexts and entropy decodes the syntax elements.07-25-2013
20130188695LOGICAL INTRA MODE NAMING IN HEVC VIDEO CODING - A method and apparatus of using logical mode numbers during both prediction and coding in the bit stream, such as for high efficiency video coders (HEVC). These logical intra mode numbers are sorted based on angle which as a result leads to improved coding designs with fewer and smaller look-up tables, and a small gain in coding efficiency. Furthermore, by using this type of naming, the number of most probable modes (MPMs) can be readily extended since no additional tables are required. The use of three MPMs achieves a larger gain of 0.25% and 0.31% for the AI_HE and AI_LC cases, respectively.07-25-2013
20130188697METHOD AND APPARATUS FOR SIGNALING AND CONSTRUCTION OF VIDEO CODING REFERENCE PICTURE LISTS - Improved method and apparatus for signaling of reference pictures used for temporal prediction. The signaling schemes and construction process for different reference picture lists in HEVC Working Draft 5 (WD5) are improved.07-25-2013
20120008680METHODS AND DEVICES FOR DATA COMPRESSION USING ADAPTIVE RECONSTRUCTION LEVELS - Encoding and decoding methods that perform quantization using adaptive reconstruction levels are presented. The reconstruction levels for a given partitioning of the data space may be selected based upon the distribution of data points within each sub-part defined by the partitioning. In some cases, the adaptive reconstruction levels may be based upon an average of the data points within each sub-part. In some cases, the adaptive reconstruction levels may be selected using a rate-distortion analysis including the quantization distortion associated with the levels versus the data points and the rate associated with transmitting the encoded adaptive reconstruction levels. The methods relate to data compression in a range of applications including audio, images and video.01-12-2012
20130195184SCALABLE VIDEO CODING METHOD AND APPARATUS - A scalable video decoding method is provided for extracting a layer of the video bit stream with a decoding level configured selectively according to the layout of the video display screen. The method includes receiving at least one video bit stream composed of at least one layer; determining a decoding level based on a preset screen configuration; extracting the video bit stream layer of the video bit stream according to the decoding level; and decoding the extracted layer. Video bit streams may be selectively decoded so as to save resources, and the decoding level and display screen layout can be adjusted with intuitive manipulation.08-01-2013
20130195180ENCODING AN IMAGE USING EMBEDDED ZERO BLOCK CODING ALONG WITH A DISCRETE COSINE TRANSFORMATION - An image (a still image or a frame of a video) is divided into macroblocks. The content of a macroblock is predicted based on the content of other macroblocks that are spatially or temporally close to the instant macroblock. The prediction is compared against the actual macroblock content to yield a residual value. The residual is then transformed by a discrete cosine (“DCT”) transformation. The resulting DCT coefficients are grouped into subbands. The subbands are encoded using embedded zero block bitplane coding (“EZBC”), and the EZBC output is sent to a decoder (usually on a device remote from the encoder). The EZBC output is also decoded by a subband-dequantizer process whose output coefficients are fed into an inverse DCT to reconstruct the residual signal. The reconstructed residual is used to refine the coding process.08-01-2013
20130195181METHODS FOR CODING AND DECODING - A method for coding a block of pixels is disclosed. The method comprises the following steps: 08-01-2013
20130195182SIMPLIFICATION OF SIGNIFICANCE MAP CODING - In one embodiment, a method for encoding video data is provided that includes receiving an array of transform coefficients corresponding to a luma component or a chroma component of the video data. The method further includes encoding a significance map for the array, where the encoding includes selecting, using a shared context derivation process that applies to both the luma component and the chroma component, context models for encoding significance values in the significance map.08-01-2013
20130195183VIDEO CODING EFFICIENCY WITH CAMERA METADATA - A system and method for using camera capture settings and related metadata to estimate the parameters for encoding a frame of the captured video data and to modify reference frames to accommodate detected camera setting changes. According to an embodiment, global brightness and color changes in video capture may be modeled by performing a sequence of transform operations on the reference frames to further improve the coding efficiency of a video coding system.08-01-2013
20130195185APPARATUS AND METHOD FOR PROVIDING ADDITIONAL INFORMATION TO FUNCTIONAL UNIT IN RECONFIGURABLE CODEC - Disclosed herein is an apparatus and method for providing additional information to an FU in a reconfigurable codec. The apparatus includes a syntax parser, a prediction mode converter unit, and an inverse prediction unit. The syntax parser parses the encoding type value of a multimedia bit stream and a first prediction mode value from the multimedia bit stream. The prediction mode converter unit converts the first prediction mode value into a second prediction mode value corresponding to the encoding type value. The inverse prediction unit determines an inverse prediction operating mode based on the second prediction mode value.08-01-2013
20130195186Scalable Video Coding Extensions for High Efficiency Video Coding - A method of scalable video encoding, the method comprising encoding a first video signal using a base layer encoding, and encoding a second video signal using an enhancement layer encoding, wherein the enhancement layer encoding uses inter-layer prediction information based on the first video signal, wherein one of the first video signal or the second video signal has a resolution of 960×540, wherein the second video signal has a higher resolution than the first video signal, and wherein the first video signal is related to the second video signal by a spatial resolution factor that is an integer or an integer ratio.08-01-2013
20130195187IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, AND PROGRAM - The present invention relates to an image processing device, an image processing method, and a program that can reduce processing loads and delays while suppressing decreases in inter prediction precision when motion compensation operations with fractional precision are performed in inter predictions. When a pixel of a predicted image in an inter prediction has a fractional pixel position that is not a ½ pixel position in the horizontal direction and the vertical direction in a reference image, a reference image read unit 08-01-2013
20120300842Decoding Apparatus, Decoding Method, and Program of Same - An encoding apparatus for encoding progressive image data and interlace image data corresponding to this progressive image data, having a first encoding unit configured to encode picture data composing the interlace image data to generate first encoded data and decoding and recomposing the first encoded data to generate recomposed image data, an up sample processing unit configured to up sample the generated recomposed image data to generate image data having the same resolution as that of the progressive image data, and a second encoding unit configured to encode the picture data composing the progressive image data to generate second encoded data using the generated image data as predictive image data.11-29-2012
20120300839Acceleration of Bypass Binary Symbol Processing in Video Coding - A method for encoding a video sequence in a video encoder to generate a compressed video bit stream is provided that includes binarizing a plurality of syntax elements, wherein each binarized syntax element comprises a string of one or more binary symbols (bins), wherein a bin is one selected from a context-coded bin and bypass bin, encoding the context-coded bins of the binarized syntax elements using binary arithmetic encoding, and adding the bypass bins of the binarized syntax elements to the compressed video bit stream with no encoding.11-29-2012
20120300837METHOD AND APPARATUS FOR USING SEGMENTATION-BASED CODING OF PREDICTION INFORMATION - Disclosed herein is a method for encoding a video signal having at least one frame with a plurality of blocks. The method includes assigning at least some of the plurality of blocks to a segment, determining at least one prediction element for the segment using a processor, applying the at least one prediction element to a first block and at least some of the other blocks in the segment and encoding the first block and the other blocks in the segment.11-29-2012
20120093220IN-LOOP DEBLOCKING FOR INTRA-CODED IMAGES OR FRAMES - Methods and encoders/decoders for applying in-loop deblocking to intra-coded images/frames. In a decoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block prior to decoding the subsequent block in the decoding sequence. In an encoding context, a deblocking filter is applied to reconstructed pixels of an intra-coded block in an inter-coding loop before encoding a subsequent block in the coding order for the image.04-19-2012
20130208792REFERENCE PICTURE SET (RPS) SIGNALING FOR SCALABLE HIGH EFFICIENCY VIDEO CODING (HEVC) - Embodiments contemplate coding video data by generating a video encoded bitstream that may include reference picture set (RPS) extensions for inter-layer reference pictures, and the extensions may include inter-layer delta Picture Order Counts (POCs). Embodiments may also include signaling that lower layer reference pictures may be available in a lower layer decoder picture buffer (DPB), and/or an aggregate DPB, that may be added to the RPS set of a higher layer. The bitstream may include a signal indicating whether the higher layer RPS may be specified by a lower layer RPS, and the lower layer RPS may be temporal, inter-layer prediction (ILP), or both.08-15-2013
20130208793MOTION VIDEO ENCODING APPARATUS, MOTION VIDEO ENCODING METHOD, AND MOTION VIDEO ENCODING COMPUTER PROGRAM - A motion video encoding apparatus includes: a group determining unit which determines to which of a plurality of groups each block belongs; a group decode time information computing unit which computes a decode time for each of the groups; a group information appending unit which appends group information identifying the group to which each block belongs to data to be output; a code amount control unit which controls an amount of code for each block contained in the group so that data needed for decoding all the blocks contained in the group will arrive at a stream receive buffer provided in a motion video decoding apparatus by the decode time of the group when the data is transmitted to the motion video decoding apparatus at a prescribed transmission rate; and an encode processing unit which encodes each block, based on control information concerning the amount of code.08-15-2013