Patent application number | Description | Published |
20090016621 | MOVING-PICTURE CODING DEVICE AND MOVING-PICTURE CODING METHOD - A moving-picture coding device that performs inter-field motion compensation prediction, includes a reference limit area determining unit that determines to select, for each reference picture, with respect to reference pictures used for coding, a luminance or chrominance reference limit area putting a limit to a reference picture used for generating a prediction picture of a luminance or chrominance of a coding target block belonging to the coding target picture limit area of the case upon each reference picture being previously coded; a selecting inhibit vector determining unit that determines, in a case of coding the coding block belonging to the coding target picture limit area, a selecting inhibit vector that inhibits selecting a luminance and the chrominance are comprised only of pixels of the luminance reference limit area and the chrominance reference limit area. | 01-15-2009 |
20100040143 | Video 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 |
20100098170 | Transcoding device and transcoding method - A transcoding device includes a decoding unit that decodes both motion vectors of macroblocks and images from encoded images in a first encoding format; a first decoded image storing unit that stores therein the decoded motion vectors of macroblocks and the decoded images; a vector searching unit that searches for motion vectors of macroblocks in a second encoding format by using the decoded images stored in the first decoded image storing unit as reference images and by using the decoded motion vectors stored in the first decoded image storing unit; and a motion compensating unit that reads, from the first decoded image storing unit, areas in the decoded images, which are indicated by the motion vectors for which the vector searching unit has searched, and performs motion compensation by using the areas in the decoded images and the motion vectors for which the vector searching unit has searched. | 04-22-2010 |
20100272170 | IMAGE ENCODING APPARATUS, IMAGE ENCODING METHOD AND MEDIUM ON WHICH IMAGE ENCODING PROGRAM IS RECORDED - An image encoding apparatus configured to perform sub-band encoding, the apparatus includes: a plurality of encoding units configured to encode an image signal separated into a plurality of sections; a plurality of storage units configured to hold data encoded by the encoding units; and a control unit configured to determine capacities of encoded data of the section of the separated image signal on the basis of statistical information capacities of the section of the separated image signal and data capacities after encoding by the encoding units. | 10-28-2010 |
20120002725 | Video 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 |
20120320980 | VIDEO DECODING APPARATUS, VIDEO CODING APPARATUS, VIDEO DECODING METHOD, VIDEO CODING METHOD, AND STORAGE MEDIUM - A video decoding apparatus includes a motion vector information storing unit configured to store motion vectors of blocks in previously-decoded pictures and a temporally-adjacent vector predictor generating unit. The temporally-adjacent vector predictor generating unit includes a block determining unit configured to determine multiple blocks in a picture that is temporally adjacent to a picture including a target block to be processed, the determined blocks including a block that is closest to first coordinates in the target block; a vector selecting unit configured to obtain motion vectors of the determined blocks from the motion vector information storing unit and select at least one motion vector from the obtained motion vectors; and a generating unit configured to generate a vector predictor candidate, which is used for a decoding process of the target block, based on the selected motion vector. | 12-20-2012 |
20120320981 | VIDEO DECODING APPARATUS, VIDEO CODING APPARATUS, VIDEO DECODING METHOD, VIDEO CODING METHOD, AND STORAGE MEDIUM - A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount. | 12-20-2012 |
20130044808 | IMAGE ENCODING DEVICE AND IMAGE DECODING DEVICE - A encoding device includes a boundary pixel prediction value generation unit, boundary pixel prediction error estimation unit, and a quantized coefficient encoding unit. The boundary pixel prediction value generation unit generates a boundary pixel prediction value as a prediction value of a boundary pixel adjacent to an encoded block in the encoding block from a locally decoded image of a plurality of encoded blocks adjacent to the encoding block. The boundary pixel prediction error estimation unit generates boundary pixel prediction error estimation information from the boundary pixel prediction value and the encoding block prediction image with respect to the boundary pixel. The quantized coefficient encoding unit generates encoding block entropy encoded data from the quantized coefficients and the boundary pixel prediction error estimation information. | 02-21-2013 |
20130107941 | MOVING IMAGE DECODING APPARATUS, MOVING IMAGE ENCODING APPARATUS, MOVING IMAGE DECODING METHOD AND MOVING IMAGE ENCODING METHOD | 05-02-2013 |
20130107958 | VIDEO DECODING APPARATUS AND METHOD | 05-02-2013 |
20130114722 | VIDEO ENCODING APPARATUS AND VIDEO DECODING APPARATUS - A video encoding apparatus includes: a reference vector deriving unit to derive as a reference vector a vector used when encoding a block that is near a block to be encoded and is included in a region where a field picture to be encoded is subjected to encode; a scaling unit to scale the reference vector based on a temporal distance between the field picture and a first encoded field picture specified by the reference vector and a temporal distance between the field picture and a second encoded field picture specified by a reference index and referenced by the block to be encoded in the field picture to generate a motion prediction vector; and a motion prediction vector correction unit to correct the motion prediction vector using a parity of the field picture, a parity of the first encoded field picture, and a parity of the second encoded field picture. | 05-09-2013 |
20130128976 | METHOD OF CODING MOVING IMAGE AND METHOD OF DECODING MOVING IMAGE - A method includes extracting a first vector used to code a specific block belonging to a coded field picture arranged chronologically adjacent to a field picture to be coded and to a block to be coded, generating a second vector by scaling the first vector based on a temporal distance between the field picture and a second picture specified by a reference index and referenced for the block and included in the field picture and a temporal distance between a first picture pointed by the first vector and the coded field picture arranged chronologically adjacent to the field picture, and correcting the second vector based on a parity of the field picture, a parity of the first picture, a parity of the second picture and a parity of the coded field picture and forming the corrected second vector. | 05-23-2013 |
20130128981 | MOVING IMAGE DECODING APPARATUS, MOVING IMAGE DECODING METHOD AND MOVING IMAGE ENCODING APPARATUS, AND MOVING IMAGE ENCODING METHOD - A moving image decoding apparatus includes a region boundary position information extracting unit which extracts region boundary position information between a clean region including at least one block encoded such that a pixel value is guaranteed to be decoded correctly, and a non-clean region, a region classification unit which specifies the clean region and the non-clean region in each picture based on the region boundary position information, a referenceability determining unit which, when a decoding target block belongs to the clean region, determines that blocks in the clean region in the decoding target picture and blocks in the clean region in the reference picture are referenceable, and, when the decoding target block belongs to the non-clean region, determines that all of blocks of the decoding target picture and the reference picture are referenceable, and a decoding unit which decodes the decoding target block with reference to only the referenceable blocks. | 05-23-2013 |
20130156107 | ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, AND DECODING METHOD - An encoding device includes a determination unit configured to determine, when performing detection of a motion vector using the decoded image of a frame image encoded in increments of blocks prior to the frame image to be encoded regarding an encoded block to be encoded of a plurality of blocks included in this frame image to be encoded at the time of encoding a frame image included in a moving image where a first image and a second image are arrayed using inter-image prediction encoding processing, correlation height as to the image of the encoded block regarding each of the image of a first area corresponding to the first image and the image of a second area corresponding to the second image included in a boundary block straddling a boundary between the first image and the second image of a block included in the decoded image. | 06-20-2013 |
20130188714 | VIDEO IMAGE ENCODING DEVICE, VIDEO IMAGE ENCODING METHOD - A video image encoding device includes a calculation unit for calculating a decoding time of each group including plural blocks; a source encode unit for encoding each of the plural blocks based on the encoding amount of each block controlled based on the decoding time and generating compressed data; and an entropy encode unit for performing an arithmetic encoding process on the compressed data in each block and outputting a bit stream. The entropy encode unit outputs undetermined bits retained by the arithmetic encoding process when all bits corresponding to the compressed data in each group are not output at a time point when the arithmetic encoding process on the compressed data in a predetermined number of blocks in a next group is finished, and the calculation unit shifts the decoding time of each group by a processing time of the predetermined number of blocks. | 07-25-2013 |
20130208793 | MOTION 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 |
20130215961 | MOTION VIDEO ENCODING APPARATUS, MOTION VIDEO ENCODING METHOD, MOTION VIDEO ENCODING COMPUTER PROGRAM, MOTION VIDEO DECODING APPARATUS, MOTION VIDEO DECODING METHOD, AND MOTION VIDEO DECODING COMPUTER PROGRAM - A motion video encoding apparatus includes: a prediction error image generating unit which computes a difference between a block being encoded and a predicted image for the block being encoded and thereby generates a prediction error image; a prediction error orthogonal-transforming unit which computes a plurality of first frequency coefficients by orthogonal-transforming the prediction error image; a predicted image orthogonal-transforming unit which computes a plurality of second frequency coefficients by orthogonal-transforming the predicted image; a sign judging unit which judges the positive/negative sign of each one of the plurality of second frequency coefficients; and an adaptive encoding unit which encodes each given one of the plurality of first frequency coefficients by using sign match/mismatch information that indicates a match or mismatch between the sign of the given first frequency coefficient and the sign of a corresponding one of the plurality of second frequency coefficients. | 08-22-2013 |
20130215966 | IMAGE ENCODING METHOD, IMAGE DECODING METHOD, IMAGE ENCODING DEVICE, IMAGE DECODING DEVICE - A method including acquiring decode information of a decoded block in a decode target image from a storage unit; selecting an decoded image such that the decode target image is situated between the decoded image and a reference image of the decoded image; acquiring, from the storage unit, decode information of a predetermined block in the selected decoded image; predicting a reference mode indicating a prediction direction of a decode target block that refers to decoded images in plural directions, by using the acquired decode information of the decoded block and decode information of the predetermined block; decoding reference mode information for determining the reference mode of the decode target block from encode data; and determining the reference mode of the decode target block from the predicted reference mode and the decoded reference mode information. | 08-22-2013 |
20130223526 | IMAGE DECODING METHOD, IMAGE CODING METHOD, IMAGE DECODING DEVICE, IMAGE CODING DEVICE, AND RECORDING MEDIUM - A method for decoding an image divided into plural blocks includes acquiring decoding information of a decoded block in a decoding target image from a storage unit that stores the decoding information of the decoded block and decoding information of blocks in plural decoded images; selecting a decoded image from the plural decoded images; acquiring decoding information of a corresponding block in the selected decoded image from the storage unit; predicting a division mode, which indicates a division shape of a decoding target block, by using the acquired decoding information of the decoded block and the acquired decoding information of the corresponding block; decoding division mode information, which indicates the division mode of the decoding target block based on coded data, and determining the division mode of the decoding target block based on the predicted division mode and the decoded division mode information. | 08-29-2013 |
20130287102 | VIDEO IMAGE ENCODING DEVICE, VIDEO IMAGE ENCODING METHOD, VIDEO IMAGE DECODING DEVICE, AND VIDEO IMAGE DECODING METHOD - A method including determining a group to which each of the plurality of blocks belongs, the plurality of blocks being obtained by dividing each picture included in video image data; adding, to an output stream, group information expressing information of the group; calculating a decode time for each of the groups; determining a decode delay for each of the groups; adding, to the output stream, a delay time of each of the groups; controlling an encode amount so that data used for decoding all of the blocks included in one of the groups arrives at a receiving buffer of a decoding device by a time expressed by the delay time; and performing encoding based on the encode amount controlled at the controlling. | 10-31-2013 |
20130287117 | VIDEO IMAGE ENCODING DEVICE, VIDEO IMAGE ENCODING METHOD, VIDEO IMAGE DECODING DEVICE, AND VIDEO IMAGE DECODING METHOD - A method includes determining a group to which each of a plurality of blocks belongs, the plurality of blocks being obtained by dividing each picture included in video image data; adding, to an output stream, group information expressing the group to which each of the plurality of blocks belongs; calculating an output time for each of the groups; determining output delay for each of the groups; adding, to the output stream, an output delay time from a decode time of each of the groups; controlling an encode amount so that data used for outputting all of the blocks included in one of the groups arrives at a decoding buffer of a decoding device and decoding is completed by an output time expressed by the output delay time; and performing encoding based on the encode amount that has been controlled. | 10-31-2013 |
20130287118 | VIDEO IMAGE ENCODING DEVICE, VIDEO IMAGE ENCODING METHOD, VIDEO IMAGE DECODING DEVICE, AND VIDEO IMAGE DECODING METHOD - A method includes determining a group to which each block belongs, the blocks being obtained by dividing each picture included in video image data; adding, to an output stream, information of groups including blocks; calculating a decode time for groups and adding the decode time to the output stream; calculating a display time for the groups and adding the display time to the output stream; controlling an encode amount so that data used for decoding all of the blocks included in a group arrives at a receiving buffer of a decoding device by the display time; encoding based on the controlled encode amount; and implementing control so that first data in a next picture does not arrive at the receiving buffer by the display time, when the data used for decoding all blocks in a group does not arrive at the receiving buffer by the display time. | 10-31-2013 |
20130294502 | MOTION 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, for each block, a group to which the block belongs; a group decode time information computing unit which computes a decode time for each group; a code amount control unit which controls, for each group, an amount of code resulting from entropy encoding each block in the group so that data needed for decoding all of the blocks in the group arrives at a stream receive buffer by a decode time of the group when the data is transmitted at a prescribed transmission rate; a compression unit which compresses the data of each block based on the amount of code of the block; an entropy encoding unit which entropy-encodes the compressed data of each block; and a decode information appending unit which appends, to data to be output, correction information for the decode time of each group. | 11-07-2013 |
20130322540 | MOVING IMAGE DECODING METHOD, MOVING IMAGE ENCODING METHOD, AND MOVING IMAGE DECODING APPARATUS - A moving image decoding method for decoding encoded data of an image partitioned into a plurality of blocks includes determining a predicted motion vector corresponding to a motion vector of a block to be decoded by using motion vector information, the motion vector information including a motion vector of an already-decoded block and reference destination information designating a reference destination of the motion vector of the already-decoded block; controlling a decoding process of the motion vector of the block to be decoded using the predicted motion vector depending on whether the reference destination information designating the reference destination of the motion vector designates an inter-view reference image; and decoding the motion vector of the block to be decoded with the controlled decoding process. | 12-05-2013 |
20140003508 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 01-02-2014 |
20140003519 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD | 01-02-2014 |
20140092966 | VIDEO ENCODING APPARATUS, VIDEO DECODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO DECODING METHOD - A video encoding apparatus appends decoding delay and display delay correction information to encoded video data in order to ensure that even when one or more pictures that are later in encoding order than a starting encoded picture in a video data stream to be spliced to a trailing end of another encoded video data stream have been discarded from among pictures contained in the video data stream, the starting encoded picture and its subsequent pictures can be continuously decoded and displayed by a video decoding apparatus. The correction information is calculated based on a decoding interval between each discarded picture and a picture that immediately precedes the discarded picture. The video decoding apparatus corrects the decoding delay and display delay of the starting encoded picture and its subsequent pictures by using the calculated correction information. | 04-03-2014 |
20140201798 | VIDEO MULTIPLEXING APPARATUS, VIDEO MULTIPLEXING METHOD, MULTIPLEXED VIDEO DECODING APPARATUS, AND MULTIPLEXED VIDEO DECODING METHOD - A video multiplexing apparatus includes: a control unit which determines first decode/display time information and second decode/display time information for each picture in video data and for each encoding unit of first media data; a video packet generating unit which appends the first and second decode/display time information for the picture to encoded data of the video data; and a media packet generating unit which appends the first and second decode/display time information for the encoding unit to encoded data of the first media data. The first decode/display time information is used when the decoding unit of the video data is a picture, and the second decode/display time information is used when the decoding unit is a sub-picture. The picture display time based on the second decode/display time information is earlier than the picture display time based on the first decode/display time information. | 07-17-2014 |
20150016511 | IMAGE COMPRESSION APPARATUS AND METHOD - An image compression apparatus including an image segmenting unit to segment an image into a plurality of image blocks; a prediction unit to take an adjacent pixel to which each pixel points in the same angle as a reference pixel, and take a pixel value or a reconstruction value of the reference pixel as a prediction value; an encoding unit to encode a residual obtained by subtracting the prediction value from the pixel value, or a quantization coefficient obtained through a transformation and a quantization of the residual; and a reconstruction unit to add the prediction value with corresponding residual or a residual obtained through an inverse transformation and an inverse quantization of the quantization coefficient to obtain a reconstruction value of each pixel. | 01-15-2015 |
20150023418 | IMAGE PROCESSING APPARATUS AND IMAGE PROCESSING METHOD - A moving image processing apparatus includes a storage unit to store encoding parameter information generated by encoding each of multiple blocks obtained by partitioning an image; a candidate list generation unit to generate a prediction vector candidate list including two prediction vector candidates for a motion vector of each of the blocks to be processed; a difference vector calculation unit to set one bit of predetermined information in selection information for the prediction vector candidates if inter-prediction is applied to the block to be processed, and to calculate a difference vector representing a difference between the motion vector of the block to be processed and one of the prediction vector candidates designated by the selection information; and a variable-length encoding unit to apply variable-length encoding to the encoding parameter information including the difference vector and the selection information. | 01-22-2015 |
20150049804 | VIDEO DECODER, VIDEO ENCODER, VIDEO DECODING METHOD, AND VIDEO ENCODING METHOD - A video decoder decoding an encoded stream includes a parallel entropy decoding part to entropy decode the stream of blocks in block lines in parallel, a parallel QP prediction part to compute prediction values of the blocks in the block lines in parallel, and a parallel decoding processing part to generate decoded pixels of the blocks in the block lines in parallel, the decoded pixel being obtained utilizing data decoded by the parallel entropy decoding part and the prediction value. When performing computing processing in parallel per unit of N block lines, the processing is performed on a processing block in a (K−1)th block line preceding a processing block in a Kth block line by at least one block in a horizontal position to compute the prediction value of the processing block by referring to a block already processed corresponding to the processing block. | 02-19-2015 |
20150146776 | VIDEO IMAGE ENCODING DEVICE, VIDEO IMAGE ENCODING METHOD - A video image encoding device includes a processor configured to execute a procedure. The procedure includes: computing a pixel average value and a pixel variation level for each of an encoding target block and an adjacent block; determining whether or not a false contour generation condition has been satisfied based on the pixel average values and pixel variation levels computed for the encoding target block and the adjacent block; and if the determination result is that the false contour generation condition has been satisfied, quantizing a prediction error image, representing a difference between an image of the encoding target block and a predicted image of the encoding target block encoded by the intra-frame prediction encoding, with a smaller quantization parameter than a set quantization parameter. | 05-28-2015 |
20150189312 | VIDEO DECODING APPARATUS, VIDEO CODING APPARATUS, VIDEO DECODING METHOD, VIDEO CODING METHOD, AND STORAGE MEDIUM - A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount. | 07-02-2015 |
20150189313 | VIDEO DECODING APPARATUS, VIDEO CODING APPARATUS, VIDEO DECODING METHOD, VIDEO CODING METHOD, AND STORAGE MEDIUM - A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount. | 07-02-2015 |
20150208085 | VIDEO DECODING APPARATUS, VIDEO CODING APPARATUS, VIDEO DECODING METHOD, VIDEO CODING METHOD, AND STORAGE MEDIUM - A video decoding apparatus includes a reference picture list storing unit configured to store picture information of pictures; a motion vector information storing unit configured to store motion vector information including motion vectors of blocks that are spatially and temporally adjacent to a target block to be decoded and reference picture identifiers indicating pictures that the motion vectors refer to; and a vector predictor generating unit configured to scale a vector predictor candidate for a motion vector of the target block based on the picture information and the motion vector information and to correct the scaled vector predictor candidate toward 0 by a predetermined amount. | 07-23-2015 |