42nd week of 2013 patent applcation highlights part 34 |
Patent application number | Title | Published |
20130272378 | COEFFICIENT GROUPS AND COEFFICIENT CODING FOR COEFFICIENT SCANS - Techniques are described for a video coder (e.g., video encoder or video decoder) that is configured to select a context pattern from a plurality of context patterns that are the same for a plurality of scan types. Techniques are also described for a video coder that is configured to select a context pattern that is stored as a one-dimensional context pattern and identifies contexts for two or more scan types. | 2013-10-17 |
20130272379 | COEFFICIENT GROUPS AND COEFFICIENT CODING FOR COEFFICIENT SCANS - Techniques are described for a video coder (e.g., video encoder or video decoder) that is configured to select a context pattern from a plurality of context patterns that are the same for a plurality of scan types. Techniques are also described for a video coder that is configured to select a context pattern that is stored as a one-dimensional context pattern and identifies contexts for two or more scan types. | 2013-10-17 |
20130272380 | GROUPING BYPASS CODED SYNTAX ELEMENTS IN VIDEO CODING - A video encoding device is configured to generate a first group of syntax elements. Each syntax element in the first group indicates whether a prediction mode of a respective prediction unit (PU) is based on an index into a list of most probable modes. A second group of syntax elements is generated that correspond to respective syntax elements in the first group. The syntax elements in the second group identify either an index into the list of most probable modes or an intra-prediction mode. The first group of syntax elements are context adaptive binary arithmetic coding (CABAC) encoded, and the second group of syntax elements are bypass encoded. A video decoder is configured to receive the entropy encoded first and second groups of syntax elements. The video decoder CABAC decodes the first group of flags and bypass decodes the second group of flags. | 2013-10-17 |
20130272381 | SIMPLIFIED NON-SQUARE QUADTREE TRANSFORMS FOR VIDEO CODING - In an example, a method of decoding video data includes determining a prediction partitioning structure for predicting pixel values associated with a block of video data. The method also includes determining a transform partitioning structure for applying one or more transforms to the predicted pixel values. Determining the transform split structure includes splitting a parent transform unit, upon determining the transform partitioning structure comprises splitting the parent transform unit into one or more square transforms, determining one or more square transforms such that each of the one or more square transforms correspond to exactly one prediction partition, and upon determining the transform partitioning structure comprises splitting the parent transform unit into one or more non-square transforms, determining whether to split the one or more non-square transforms based at least in part on the one or more non-square transforms being non-square. | 2013-10-17 |
20130272382 | FIELD/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. | 2013-10-17 |
20130272383 | RATE CONTROL FOR CONTENT TRANSCODING - The disclosed subject matter relates to rate control aspects for content transcoding. A rate control scheme for transcoding is disclsoed that is considerate of quantization parameters related to an encoded input content stream and when transcoding the input content stream into an output content stream. Quantization parameters can be determined for an encoded input content stream by parsing the stream. These can be combined with a rate-distortion model for transcoding to determine transcoding quantization parameters. Further, iteratively applying the derived rate-distortion model to windows of frames during transcoding can facilitate real-time two-pass transcoding. Window size can be based on buffer constraints. Moreover, a sliding window buffer check scheme can be employed to avoid buffer constraint violations. | 2013-10-17 |
20130272384 | MODIFIED CONTEXTS FOR LEVEL CODING OF VIDEO DATA - Methods and devices for reconstructing coefficient levels from a bitstream of encoded video data for a coefficient group in a transform unit, and corresponding methods and devices for encoding are provided. The method of reconstructing includes, for each of the non-zero coefficients in the coefficient group, in scan order, decoding a greater-than-one flag for that non-zero coefficient if fewer than two previously-decoded greater-than-one flags for that coefficient group are equal to one. The coefficient levels for the non-zero coefficients are reconstructed based, at least in part, upon the decoded greater-than-one flags. | 2013-10-17 |
20130272385 | LEVEL DECISION IN RATE DISTORTION OPTIMIZED QUANTIZATION - A computing device, such as a video encoder, determines an initial quantized level for a coefficient of a coefficient block and determines whether the coefficient is less than the product of the initial quantized level and a quantization step size value. In response to determining that the coefficient is less than the product of the initial quantized level and the quantization step size value, the computing device determines rate-distortion costs of quantizing the coefficient to be the initial quantized level for the coefficient, the initial quantized level minus one, and in some circumstances, 0. The computing device determines an actual quantized level for the coefficient based at least in part on the calculated rate-distortion costs and includes the actual quantized level in a quantized version of the coefficient block. | 2013-10-17 |
20130272386 | LOOKUP TABLE FOR RATE DISTORTION OPTIMIZED QUANTIZATION - A computing device, such as a video encoder, uses respective positions of respective coefficients in a coefficient block to look up, in a lookup table, respective quantization offsets for the respective coefficients. Furthermore, the computing device determines, based at least in part on the quantization offsets for the one or more coefficients, respective quantized levels for the respective coefficients. | 2013-10-17 |
20130272387 | METHOD AND DEVICE FOR SUBBAND CODING FREQUENCY CONVERSION UNIT, AND METHOD AND DEVICE FOR IMAGE ENCODING/DECODING USING SAME - The present disclosure provides a method and apparatus for subband-coding a frequency conversion unit and a video encoding/decoding method a video encoding/decoding apparatus using the same. The method and the apparatus for subband-coding the frequency conversion unit include generating an encoding stream by splitting the frequency conversion unit into one or more frequency domains, generating frequency domain encoding information according to whether there is a non-zero frequency coefficient in each frequency domain, scanning the frequency coefficient of each frequency domain to generate a frequency domain frequency coefficient stream, and binarizing and encoding the frequency domain encoding information and the scanned frequency domain frequency coefficient stream. | 2013-10-17 |
20130272388 | APPARATUS, METHOD, AND PROGRAM FOR CODING IMAGE AND APPARATUS, METHOD, AND PROGRAM FOR DECODING IMAGE - Provided is a method for coding an image to generate an image bit stream, the method including a first coding step of coding an image in units of blocks in a first coding mode in which quantization is performed; a second coding step of coding an image in units of blocks in a second coding mode in which quantization is not performed; a determination step of determining which of the first coding mode or the second coding mode is used to code the image in units of blocks; and an integrally coding step of, in the case where it is determined in the determination step that coding is performed using the second coding step, switching between the first coding step and the second coding step in units of blocks and coding information indicating that switching is performed in units of blocks as block-by-block mode-switching information. | 2013-10-17 |
20130272389 | Reducing Context Coded and Bypass Coded Bins to Improve Context Adaptive Binary Arithmetic Coding (CABAC) Throughput - Techniques for context-adaptive binary arithmetic coding (CABAC) coding with a reduced number of context coded and/or bypass coded bins are provided. Rather than using only truncated unary binarization for the syntax element representing the delta quantization parameter and context coding all of the resulting bins as in the prior art, a different binarization is used and only part of the resulting bins are context coded, thus reducing the worst case number of context coded bins for this syntax element. Further, binarization techniques for the syntax element representing the remaining actual value of a transform coefficient are provided that restrict the maximum codeword length of this syntax element to 32 bits or less, thus reducing the number of bypass coded bins for this syntax element over the prior art. | 2013-10-17 |
20130272390 | UNIFORM GRANULARITY FOR QUANTIZATION MATRIX IN VIDEO CODING - The techniques of this disclosure are directed toward the use of modified quantization parameter (QP) values to calculate quantized and dequantized transform coefficients of a video block with uniform QP granularity. Conventionally, when a quantization matrix is used during quantization and dequantization of transform coefficients, the quantization matrix entries act as scale factors of a quantizer step-step corresponding to a base QP value, which results in non-uniform QP granularity. To provide uniform QP granularity across all quantization matrix entries, the techniques include calculating modified QP values for transform coefficients based on associated quantization matrix entries used as offsets to a base QP value. At a video decoder, the techniques include calculating dequantized transform coefficients from quantized transform coefficients based on the modified QP values. At a video encoder, the techniques include calculating quantized transform coefficients from transform coefficients based on the modified QP values. | 2013-10-17 |
20130272391 | Method and Apparatus of Quantization Matrix Coding - A method of coding a quantization matrix (QM) comprising non-uniformly downsampling the QM to generate a plurality of downsampled quantization coefficients. Also, an apparatus used in video encoding comprising a processor configured to non-uniformly downsample a QM to generate a plurality of downsampled quantization coefficients, scan the downsampled quantization coefficients, and encode the downsampled quantization coefficients based on scanning the downsampled quantization coefficients to generate encoded coefficients, and a transmitter coupled to the processor and configured to transmit a bitstream comprising a picture parameter set containing the encoded coefficients. | 2013-10-17 |
20130272392 | PROGRAM PRODUCTS FOR ITERATIVE QUANTIZATION RATE CONTROL IN VIDEO ENCODING - Iterative video encoding systems, methods and computer program products, where residue quantization and data packing operations of an encoding process may he repeated with various values for a quantization parameter, without repeating the determination of macroblock prediction code. In an embodiment, the size of an actual file generated by encoding is compared to a target file size. The QP may be adjusted depending on the amount by which these file sizes differ. The quantization and packing may then be repeated with the adjusted QP. In an embodiment, a greater difference in these file sizes results in a greater adjustment to the QP. | 2013-10-17 |
20130272393 | VIDEO CODING AND DECODING DEVICES AND METHODS PRESERVING PPG RELEVANT INFORMATION - The present invention relates to a video encoding device ( | 2013-10-17 |
20130272394 | Graphical Application Integration with MPEG Objects - System and methods are provided to cache encoded graphical objects that may be subsequently combined with other encoded video data to form a data stream decodable by a client device according to a format specification. Paint instructions relating to a graphical object are sent from a layout engine to a rendering library. A shim intercepts these instructions and determines whether the graphical object already has been rendered and encoded. If so, a cached copy of the object is transmitted to the client device. If not, the shim transparently passes the instructions to the rendering library, and the object is rendered, encoded, and cached. Hash values are used for efficiency. Methods are disclosed to detect and cache animations, and to cut and splice cached objects into encoded video data. | 2013-10-17 |
20130272395 | IMAGE ENCODER AND DECODER USING UNDIRECTIONAL PREDICTION - The present invention relates to an image encoding and decoding technique, and more particularly, to an image encoder and decoder using unidirectional prediction. The image encoder includes a dividing unit to divide a macro block into a plurality of sub-blocks, a unidirectional application determining unit to determine whether an identical prediction mode is applied to each of the plurality of sub-blocks, and a prediction mode determining unit to determine a prediction mode with respect to each of the plurality of sub-blocks based on a determined result of the unidirectional application determining unit. | 2013-10-17 |
20130272396 | LM Mode with Uniform Bit-Width Multipliers - A video codec comprising a processor configured to generate a predicted chroma sample for a chroma block based on a plurality of reconstructed luma samples located in neighboring blocks of a corresponding reconstructed luma block and adjacent to the corresponding reconstructed luma block, and a plurality of reconstructed chroma samples located in neighboring blocks of the chroma block and adjacent to the chroma block, wherein generating the predicted chroma sample comprises computing a plurality of multipliers, wherein each of the plurality of multipliers has a bit width no greater than an input bit depth of the chroma block, and wherein generating the predicted chroma sample does not require any multiplier that has a bit width greater than the input bit depth of the chroma block. | 2013-10-17 |
20130272397 | IMAGE PROCESSING APPARATUS AND METHOD, AND PROGRAM - An image processing apparatus, a method, and a program that enable an amount of code to be suppressed below a desired value with more reliability. An emergency mode determining section determines that the amount of code of a next picture is likely to exceed an upper limit if a target bit calculated by a rate controlling section exceeds a predetermined upper limit. If it is determined that the amount of code of the next picture is likely to exceed the upper limit, the code amount controlling section controls an orthogonal transducing section to replace a transform coefficient of a predetermined frequency component with zero, controls an intra predicting section to restrict intra prediction modes to be applied, and controls a mode determining section to restrict inter prediction modes to be applied. The prevent invention can be applied to an encoding apparatus. | 2013-10-17 |
20130272398 | LONG TERM PICTURE SIGNALING - A system for decoding a video bitstream includes receiving a coded picture of the video and receiving a slice header including a least significant bits of picture order count and a delta picture order count most significant bits cycle corresponding to a respective picture. The system discriminates between whether the delta picture order count most significant bits cycle is signaling (a) no presence of a cycle corresponding to the delta picture order count most significant bits, and (b) yes presence of the cycle corresponding to the delta picture order count most significant bits. | 2013-10-17 |
20130272399 | MOVING 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. | 2013-10-17 |
20130272400 | METHODS AND DEVICES FOR ENCODING AND DECODING AT LEAST ONE IMAGE IMPLEMENTING A SELECTION OF PIXELS TO BE PREDICTED, AND CORRESPONDING COMPUTER PROGRAM - A method is provided for decoding a signal that represents at least one image. The method implements at least one iteration of the following steps, for at least one block of the image to be decoded: determining at least one selection parameter from at least one characteristic associated with at least one reference pixel of a reference region of the image, the reference region including at least one previously encoded/decoded block and/or at least one pixel predicted in a preceding iteration; selecting at least one pixel to be predicted in the block to be decoded from the at least one selection parameter; and for at least one selected pixel to be predicted, referred to as an anchor pixel, predicting the anchor pixel from at least one reference pixel, thereby outputting a predicted pixel. | 2013-10-17 |
20130272401 | METHOD AND DEVICE FOR ENCODING INTRA PREDICTION MODE FOR IMAGE PREDICTION UNIT, AND METHOD AND DEVICE FOR DECODING INTRA PREDICTION MODE FOR IMAGE PREDICTION UNIT - Methods and apparatuses for encoding and decoding an intra prediction mode of a prediction unit of a chrominance component based on an intra prediction mode of a prediction unit of a luminance component are provided. When an intra prediction mode of a prediction unit of a luminance component is the same as an intra prediction mode in an intra prediction mode candidate group of a prediction unit of a chrominance component, reconstructing the intra prediction mode candidate group of the prediction unit of the chrominance component by excluding or replacing an intra prediction mode of the prediction unit of the chrominance component which is same as an intra prediction mode of the prediction unit of the luminance component from the intra prediction mode candidate group, and encoding the intra prediction mode of the prediction unit of the chrominance component by using the reconstructed intra prediction mode candidate group. | 2013-10-17 |
20130272402 | INTER-LAYER MODE DERIVATION FOR PREDICTION IN SCALABLE VIDEO CODING - In some embodiments of a video coder, if some prediction information is not available for a first block in a current layer, the video coder uses corresponding information (e.g., intra prediction direction and motion information), if available, from the first block's co-located second block in the base layer as if it were the prediction information for the first block. The corresponding information can then be used in the current layer to determine the prediction information of succeeding blocks in the current layer. | 2013-10-17 |
20130272403 | REFERENCE PICTURE SET PREDICTION FOR VIDEO CODING - In one example, a device for decoding video data includes a video decoder configured to decode one or more syntax elements of a current reference picture set (RPS) prediction data structure, wherein at least one of the syntax elements represents a picture order count (POC) difference between a POC value associated with the current RPS and a POC value associated with a previously decoded RPS, form a current RPS based at least in part on the RPS prediction data structure and the previously decoded RPS, and decode one or more pictures using the current RPS. A video encoder may be configured to perform a substantially similar process during video encoding. | 2013-10-17 |
20130272404 | METHOD FOR ENCODING AND DECODING IMAGE INFORMATION AND DEVICE USING SAME - The present invention relates to the encoding and decoding of image information. According to the present invention, the decoding method comprises the steps of: entropy-decoding received information; performing inter prediction on a current block based on the entropy-decoded information; and restoring images by using the prediction results, wherein, in the inter prediction step, a skip mode or merge mode is applied to the current block and movement information of the current block may be determined based on the movement information of a neighboring block of the current block. | 2013-10-17 |
20130272405 | INTRA PREDICTION METHOD AND APPARATUS USING THE METHOD - An intra prediction method and a device using the intra prediction method are provided. The intra prediction method using a DC mode includes setting a bottom-right pixel to a DC-predicted value, interpolating the bottom-right pixel and an n-th top reference pixel to derive predicted values of an n-th column and interpolating the bottom-right pixel and an n-th left reference pixel to derive predicted values of an n-row, and performing bidirectional linear interpolation to derive predicted values of pixels included in a prediction unit other than the n-th row and the n-th column. | 2013-10-17 |
20130272406 | SIGNALING OF TEMPORAL MOTION VECTOR PREDICTOR (MVP) FLAG FOR TEMPORAL PREDICTION - In one embodiment, a method determines whether a flag that controls whether a temporal motion vector is used for slice is present in an encoded bitstream. If the flag is present, the method determines a value for the flag, and if the flag is not present, the method infers that the value for the flag is a default value. Then, the method evaluates whether to determine a collocated reference picture in decoding the slice from the encoded bitstream based on the value of the flag. | 2013-10-17 |
20130272407 | DECODING OF THE LINK TO A REFERENCE BLOCK IN VIDEO COMPRESSION BY IMAGE CONTENT BASED SEARCH AND RANKING - Method and apparatus are provided for efficient reference data decoding for video compression by image content based search and ranking. An apparatus includes an entropy decoder for respectively entropy decoding an encoded respective rank number for each of a plurality of candidate reference blocks with respect to a current block to be decoded to obtain a decoded respective rank number there for. The encoded respective rank number is in place of and representative of respective reference data for each of the plurality of candidate reference blocks With respect to the current block. The apparatus further includes an inverse rank transformer for respectively transforming the decoded respective rank number for each of the plurality of candidate reference blocks with respect to the current block into the respective reference data there for based on a context feature of the current block with respect to the context feature of each of the plurality of candidate reference blocks. | 2013-10-17 |
20130272408 | MOTION VECTOR PREDICTION IN VIDEO CODING - Aspects of this disclosure relate to, in an example, a method that includes identifying a first block of video data in a first temporal location from a first view, wherein the first block is associated with a first disparity motion vector. The method also includes determining a motion vector predictor for a second motion vector associated with a second block of video data, wherein the motion vector predictor is based on the first disparity motion vector. When the second motion vector comprises a disparity motion vector, the method includes determining the motion vector predictor comprises scaling the first disparity motion vector to generate a scaled motion vector predictor, wherein scaling the first disparity motion vector comprises applying a scaling factor comprising a view distance of the second disparity motion vector divided by a view distance of the first motion vector to the first disparity motion vector. | 2013-10-17 |
20130272409 | BANDWIDTH REDUCTION IN VIDEO CODING THROUGH APPLYING THE SAME REFERENCE INDEX - Techniques for encoding and decoding video data are described. A method of coding video may include determining a plurality of motion vector candidates for a block of video data for use in a motion vector prediction process, wherein each of the motion vector candidates points to a respective reference frame index, performing the motion vector prediction process using the motion vector candidates to determine a motion vector for the block of video data, and performing motion compensation for the block of video data using the motion vector and a common reference frame index, wherein the common reference frame index is used regardless of the respective reference frame index associated with the determined motion vector. | 2013-10-17 |
20130272410 | MOTION VECTOR ROUNDING - A video decoder determines, based at least in part on a size of a prediction unit (PU), whether to round either or both a horizontal or a vertical component of a motion vector of the PU from sub-pixel accuracy to integer-pixel accuracy. The video decoder generates, based at least in part on the motion vector, a predictive sample block for the PU and generates, based in part on the predictive sample block for the PU, a reconstructed sample block. | 2013-10-17 |
20130272411 | SCALABLE VIDEO CODING PREDICTION WITH NON-CAUSAL INFORMATION - This disclosure pertains to video coding. Prediction information for a current block in an enhancement layer may be determined based at least in part on base layer information obtained by coding a base block in a base layer beneath the enhancement layer. This base block may occur in a position in the base layer such that it is co-located with a non-causal block in the enhancement layer (e.g., a block that occurs after the current block in the coding order of the enhancement layer). The prediction information determined for the current block may be used to code the current block (e.g., encoding or decoding the current block). | 2013-10-17 |
20130272412 | COMMON MOTION INFORMATION CANDIDATE LIST CONSTRUCTION PROCESS - In one example, an apparatus for coding video data comprises a video coder configured to generate first and second lists of motion information candidates, respectively, for first and second video block using a common list construction process, wherein the common list construction process is common to at least a first motion information prediction mode and a second motion information prediction mode. The video coder is further configured to code the first video block using the first motion information prediction mode based on a first motion information candidate selected from the first list, and code the second video block using the second motion information prediction mode based on a second motion information candidate selected from the second list. | 2013-10-17 |
20130272413 | COMMON SPATIAL CANDIDATE BLOCKS FOR PARALLEL MOTION ESTIMATION - In one example, an apparatus for coding video data comprises a video coder configured to, for a parallel motion estimation (PME) region comprising a plurality of blocks of video data within the PME region, identify a common set of spatial candidate blocks outside of and adjacent to the PME region, each of the common set of spatial candidate blocks at a respective, predefined location relative to the PME region and, for each of the blocks within the PME region for which motion information prediction is performed, generate a respective motion information candidate list, wherein, for at least some of the blocks within the PME region for which motion information prediction is performed, generating the motion information candidate list comprises evaluating motion information of at least one of the common set of spatial candidate blocks for inclusion in the motion information candidate list for the block. | 2013-10-17 |
20130272414 | GROUP FLAG IN TRANSFORM COEFFICIENT CODING FOR VIDEO CODING - A method of decoding data indicative of a subset of transform coefficients is described. The coefficients are indicative of a block of video data. The method may include determining that no transform coefficient in the subset of transform coefficients has an absolute value greater than one, and, based on the determining, skipping one or more decoding passes on the subset of transform coefficients, the decoding passes relating to decoding level information associated with the subset of transform coefficients. | 2013-10-17 |
20130272415 | Memory Bandwidth Reduction for Motion Compensation in Video Coding - Motion compensation requires a significant amount of memory bandwidth, especially for smaller prediction unit sizes. The worst case bandwidth requirements can occur when bi-predicted 4×8 or 8×4 PUs are used. To reduce the memory bandwidth requirements for such smaller PUs, methods are provided for restricting inter-coded PUs of small block sizes to be coded only in a uni-predictive mode, i.e., forward prediction or backward prediction. More specifically, PUs of specified restricted sizes in bi-predicted slices (B slices) are forced to be uni-predicted. | 2013-10-17 |
20130272416 | METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - An apparatus for processing a video signal and method thereof are disclosed. The present invention includes receiving prediction mode information, interpolating information and a residual of a current block, reconstructing an interpolating pixel using the interpolating information and a neighbor block, and reconstructing the current block using the interpolating pixel, the prediction mode information and the residual, wherein the interpolating information is generated based on a location of the current block. According to an apparatus and method for processing a video signal, high reconstruction rate can be obtained by improving the related art method having limited intra prediction modes available for a current block located on a boundary area of a picture in encoding in a manner of reconstructing and using an interpolating pixel based on interpolating information. | 2013-10-17 |
20130272417 | METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - An apparatus for processing a video signal and method thereof are disclosed. The present invention includes receiving prediction mode information, interpolating information and a residual of a current block, reconstructing an interpolating pixel using the interpolating information and a neighbor block, and reconstructing the current block using the interpolating pixel, the prediction mode information and the residual, wherein the interpolating information is generated based on a location of the current block. According to an apparatus and method for processing a video signal, high reconstruction rate can be obtained by improving the related art method having limited intra prediction modes available for a current block located on a boundary area of a picture in encoding in a manner of reconstructing and using an interpolating pixel based on interpolating information. | 2013-10-17 |
20130272418 | METHOD AND AN APPARATUS FOR PROCESSING A VIDEO SIGNAL - An apparatus for processing a video signal and method thereof are disclosed. The present invention includes receiving prediction mode information, interpolating information and a residual of a current block, reconstructing an interpolating pixel using the interpolating information and a neighbor block, and reconstructing the current block using the interpolating pixel, the prediction mode information and the residual, wherein the interpolating information is generated based on a location of the current block. According to an apparatus and method for processing a video signal, high reconstruction rate can be obtained by improving the related art method having limited intra prediction modes available for a current block located on a boundary area of a picture in encoding in a manner of reconstructing and using an interpolating pixel based on interpolating information. | 2013-10-17 |
20130272419 | METHOD AND APPARATUS FOR GENERATING ENCODED MOTION INFORMATION/RECOVERING MOTION INFORMATION USING MOTION INFORMATION INTEGRATION, AND IMAGE ENCODING/DECODING METHOD AND APPARATUS USING SAME - A video encoding apparatus, a video decoding apparatus and a method for generating coded motion information before reconstructing by using motion information merge, the video encoding apparatus includes an inter prediction unit configured to generate a prediction block of a current block by using motion compensation, decide whether to encode motion information by merging and generate coded motion information of the current block depending on the decision; a subtraction unit configured to generate a residual block by subtracting the prediction block generated from the current block; a transform and quantization unit configured to transform and quantize the residual block to thereby generate a quantized frequency residual block; and an encoding unit configured to encode the quantized frequency residual block and the coded motion information to thereby generate a bitstream. | 2013-10-17 |
20130272420 | VIDEO ENCODING AND DECODING WITH IMPROVED ERROR RESILIENCE - A sequence of digital images is encoded into a plurality of encoding units. An image portion is encoded by motion compensation with respect to a reference image portion indicated by an item of motion information. A motion information predictor is determined among a set of motion information predictors and the item of motion information is encoded with respect to the motion information predictor. It is determined to encode the motion information predictors of an encoding unit using either a first encoding mode, which provides encoded data efficiently compressed but not parseable by a decoder in case of losses in the bitstream, or a second encoding mode which provides encoded data less efficiently compressed but systematically parseable by a decoder even in case of losses in the bitstream. | 2013-10-17 |
20130272421 | MOTION ESTIMATION DEVICE, MOTION ESTIMATION METHOD, MOTION ESTIMATION PROGRAM AND VIDEO IMAGE ENCODING DEVICE - When searching the motion in a video image, According to the present invention, it is possible to calculate a large number of motion vectors in parallel and to improve motion vector accuracy. A motion estimation device is a motion estimation device for predicting a vector by referring to the motion vector of adjacent blocks is provided with a plurality of motion estimating units which process adjacent blocks in parallel. Each motion estimating unit is provided with a pseudo predicted motion vector calculating unit for calculating a pseudo predicted motion vector by using the motion vector of a group of processed blocks, and a motion vector searching unit for searching the motion vector of a block to be processed by using the calculated pseudo predicted motion vector. | 2013-10-17 |
20130272422 | SYSTEM AND METHOD FOR ENCODING/DECODING VIDEOS USING EDGE-ADAPTIVE TRANSFORM - A system and method for encoding/decoding videos using an edge-adaptive transform. The encoding system encodes input videos using the edge-adaptive transform or, alternatively, using either the edge-adaptive transform or a discrete cosine transform. | 2013-10-17 |
20130272423 | TRANSFORM COEFFICIENT CODING - Techniques are described for determining a scan order for transform coefficients of a block. The techniques may determine context for encoding or decoding significance syntax elements for the transform coefficients based on the determined scan order. A video encoder may encode the significance syntax elements and a video decoder may decode the significance syntax elements based on the determined contexts. | 2013-10-17 |
20130272424 | SIGN HIDING TECHNIQUES FOR QUANTIZED TRANSFORM COEFFICIENTS IN VIDEO CODING - This disclosure proposes techniques for encoding and decoding transform coefficients in a video coding process. In particular, this disclosure proposes techniques determining whether or not to apply a sign data hiding process for a group of transform coefficients, and techniques for applying the sign data hiding process. In one example, this disclosure describes a method for decoding video data comprising determining a block of transform coefficients, determining whether to perform a sign data hiding process for at least one transform coefficient in the block of transform coefficients based on a single variable compared to a threshold, and decoding sign information for the block based on the determination of whether to perform the sign data hiding process. | 2013-10-17 |
20130272425 | BETA OFFSET CONTROL FOR DEBLOCKING FILTERS IN VIDEO CODING - Techniques are described for providing continuous control of a deblocking filter for a video block using a beta offset parameter. Deblocking filters are defined based on one or more deblocking decisions. Conventionally, a quantization parameter and a beta offset parameter are used to identify a beta parameter (“β”) value that determines threshold values of the deblocking decisions. The value of the beta offset parameter results in a change or increment of the β value. For small increments of the β value, rounding of the threshold values may result in no change and discontinuous control of the deblocking decisions. The techniques include calculating at least one deblocking decision for the deblocking filter according to a threshold value that has been modified based on a multiplier value of the beta offset parameter. The multiplier value applied to the beta offset parameter causes an integer change in the modified threshold value. | 2013-10-17 |
20130272426 | COURSE DIFFERENCE ESTIMATION DECOUPLING - A method and system for processing information (e.g., encoding video data). Various aspects of the present invention may comprise identifying a plurality of sets of data blocks. Such data blocks may, for example, be stored in a memory. One or more candidate data blocks may be selected from one or more of the sets of data blocks. Such a selection may be based on a first selection criterion. A candidate block selection module may, for example, perform the selection. One or more reference data blocks may be selected from the candidate data blocks. Such a selection may be based on a second selection criterion. A reference block selection module may, for example, perform the selection. The reference data block(s) may be utilized to process information. In an exemplary scenario, a reference block may be utilized to encode a current video data block, which may then be communicated to a receiving entity. | 2013-10-17 |
20130272427 | IMAGE CODING METHOD, IMAGE DECODING METHOD, IMAGE CODING APPARATUS, IMAGE DECODING APPARATUS, AND IMAGE CODING AND DECODING APPARATUS - An image coding method for coding image data on a block-by-block basis includes: segmenting a block including coefficients of frequency components, into groups corresponding to frequency ranges based on types of the coefficients, and determining a context corresponding to each of the groups; performing, for each of the coefficients, binary arithmetic coding on the coefficient according to a probability information item corresponding to the context, the context being corresponding to the group having the coefficient; and updating, for each of probability information items, the probability information item corresponding to the context, based on the coefficient included in the group corresponding to the context, wherein in the segmenting, the block is segmented into the groups with various numbers of coefficients. | 2013-10-17 |
20130272428 | VIDEO DECODER FOR COPY SLICES - A system for decoding video includes receiving a frame of the video in a bitstream that includes at least one slice and at least one tile. At least one slice and at least one tile are not all aligned with one another, and each of the at least one slice is characterized that it is decoded independently of the other at least one slice. The at least one tile is characterized that it is a rectangular region of the frame and having coding units for the decoding arranged in a raster scan order, and wherein the at least one tile of the frame are collectively arranged in a raster scan order of the frame. The system receives slice header data for at least one slice in the bitstream indicating that the pixel data of the slice is obtained from corresponding pixel locations in a different frame than the frame including the at least one slice. | 2013-10-17 |
20130272429 | Color Component Checksum Computation in Video Coding - Checksum computation for video coding is provided that breaks the dependency between the color components of a picture in the prior art. More specifically, rather than computing a single checksum for a picture as in the prior art, a separate checksum is computed for each color component. Computing a separate checksum for each color component enables parallel computation of the component checksums. Methods are provided for computing three separate checksums after a picture is decoded. Methods are also provided for computing three separate checksums on a largest coding unit basis, thus allowing the checksums for a picture to be computed as the picture is being decoded. | 2013-10-17 |
20130272430 | CONSTRAINTS AND UNIT TYPES TO SIMPLIFY VIDEO RANDOM ACCESS - Disclosed herein are innovations for bitstreams having clean random access (CRA) pictures and/or other types of random access point (RAP) pictures. New type definitions and strategic constraints on types of RAP pictures can simplify mapping of units of elementary video stream data to a container format. Such innovations can help improve the ability for video coding systems to more flexibly perform adaptive video delivery, production editing, commercial insertion, and the like. | 2013-10-17 |
20130272431 | Creation of Composite Images from a Plurality of Source Streams - Embodiments of systems and methods for signaling chroma information for a picture in a compressed video stream are provided. One system embodiment, among others, comprises a memory with logic, and a processor configured with the logic to provide a compressed video stream that includes a picture having chroma samples and luma samples, and provide in the compressed video stream a flag for signaling information corresponding to the location of the chroma samples in relation to the luma samples in the picture, wherein a first defined flag value indicates default locations of the chroma samples in relation to the luma samples in the picture, wherein a second defined flag value indicates a presence in the compressed video stream of auxiliary chroma information corresponding to relative locations of the chroma samples to the luma samples in the picture, and wherein the number of chroma samples in the picture implied by the first defined flag value is equal to the number of chroma samples in the picture implied by the second defined flag value. Other embodiments for signaling chroma information for a picture in a compressed video stream are included herein. | 2013-10-17 |
20130272432 | METHOD AND SYSTEM FOR FAST CHANNEL CHANGE - Aspects of fast channel change of programs are presented. Initial pictures of a program may be decoded earlier and displayed longer than what is indicated by corresponding clock references. Additional pictures of the program may be decoded and displayed at time indicated by the clock references. Within the time period of the initial pictures, decoding timing advances of initial pictures may be reduced and corresponding picture displaying rates may converge to an intended constant frame rate used for additional pictures displaying. Pictures may be decoded and displayed when the corresponding data are available in a coded data buffer (CDB) and a decoded picture buffer (DPB), respectively. Depending on the implementation, the respective previous picture may be displayed when a decoded picture is available in the DPB. | 2013-10-17 |
20130272433 | ERROR CONCEALMENT FOR MPEG DECODING WITH PERSONAL VIDEO RECORDING FUNCTIONALITY - Error concealment for motion picture expert group (MPEG) decoding with personal video recording functionality. Error concealment of MPEG data may take place within various components within playback, recording, reading and writing data systems. The error concealment may be provided within existing systems whose components may not be capable of accommodating errors within MPEG data. In certain embodiments, the available data that contain no errors is maximized to conceal those portions of the data that do include errors. | 2013-10-17 |
20130272434 | ELECTRONIC DEVICE WITH VIDEO PLAYBACK FUNCTION - An electronic device includes a video port, a codec chip, a Pi type filter, a coupling capacitor, and a path switch. The codec chip outputs video signals. The Pi type filter filters noise from the video signals. The coupling capacitor and the path switch are connected in parallel between the Pi type filter and the video port. When the electronic device is connected to another electronic device, the codec chip turns off the path switch, and the coupling capacitor filters direct current from the video signals from which any noise has been filtered and transmits the video signals to the another electronic device. When the electronic device is connected to a display device, the codec chip turns on the path switch, the video signals from which only noise has been filtered are directly transmitted to the display device via the path switch. | 2013-10-17 |
20130272435 | VARIABLE-LENGTH CYCLIC PREFIXES IN OFDM COAXIAL COMMUNICATIONS - A coax network unit (CNU) is coupled to a coax line terminal (CLT) by a cable plant. In a discovery mode of operation, the CNU receives from the CLT one or more message packets that include one or more orthogonal frequency-division multiplexing (OFDM) symbols with cyclic prefixes of a first length. In a normal mode of operation subsequent to the discovery mode, the CNU receives data packets comprising OFDM symbols from the CLT. The OFDM symbols of the received data packets have cyclic prefixes of a second length that is less than the first length. | 2013-10-17 |
20130272436 | METHODS AND APPARATUS FOR MITIGATING INTERFERENCE BETWEEN CO-LOCATED COLLABORATING RADIOS - A method and apparatus for mitigating out of band emissions among user equipment and base stations operating at geographically co-located and spectrally distinct wireless communication systems are provided herein. During operation, a wireless radio will determine potential interferers. Preferably, these interferers comprise user equipment and base stations operating at geographically co-located and spectrally distinct wireless communication systems. Once determined, a channel quality indicator (CQI) will be adjusted accordingly to accommodate for any potential interferer. Because the CQI will take into effect any potential interferer, transmissions to/from the wireless radio will be made more robust, decreasing channel interference. | 2013-10-17 |
20130272437 | DIRECTED MIMO COMMUNICATIONS - A system is disclosed that includes a plurality of m antenna arrays configured to receive a propagating radio frequency signal. Each antenna array includes a plurality of antenna elements and a beamformer configured to produce n different bi-directional beams using the plurality of antenna elements. The system includes a plurality of n multiple-input multiple-output transceivers (MIMO). Each MIMO transceiver includes a MIMO receiver configured to accept m received signals, wherein the i-th input signal to the j-th MIMO receiver corresponds to the j-th beam of the i-th antenna array. Each MIMO transceiver also includes a MIMO transmitter configured to provide m transmit signals, wherein the v-th output signal from the z-th MIMO transmitter corresponding to the z-th beam of the v-th antenna array is selected for transmission. m, n, v, and z are integer number values, and i=1, . . . , m, j=1, . . . , n, and v=1, . . . m. | 2013-10-17 |
20130272438 | METHOD, TRANSMITTER AND RECEIVER FOR BEAMFORMING - Embodiments of the invention provide a method for beamforming based on Grassmannian predictive coding (GPC) in a MIMO system. The method may comprise steps of: estimating present channel direction information (CDI) according to a received signal; predicting future CDI based on the present CDI and at least one of previous CDIs; predicting future codebook based on present codebook and at least one of previous codebooks; selecting a codeword from the future codebook based on the future CSI; and feeding back an index of the selected codeword to the transmitter. | 2013-10-17 |
20130272439 | CODEBOOK SELECTION FOR TRANSMIT BEAMFORMING - A method selects a codebook for transmit beamforming. The method constructs an estimated channel matrix based on a codebook, selects a channel submatrix from the estimated channel matrix, calculates a selection matrix from the channel submatrix; and assigns a steering matrix based on the selection matrix. The method may construct an estimated channel matrix, select a channel submatrix, and calculate a selection matrix for each of multiple codebooks, then select an optimal codebook. The steering matrix is assigned based on the optimal codebook. The steering matrix may be used in steering a transmitted packet. The method may also calculate a post-MIMO equalizer signal-to-noise ratio for a data stream, based on the estimated channel matrix and the selected codebook. A related system is also disclosed. Other embodiments are provided, and each of the embodiments described herein can be used alone or in combination with one another. | 2013-10-17 |
20130272440 | Transmission of an Information Sequence - A method implemented in a mobile communications system for data transmission is disclosed. The method includes selecting a set of parallel channels, determining transmission rank, and determining a precoding matrix of the transmission rank for the set of parallel channels, wherein the precoding matrix is formed by applying householder transformation to a vector to make a matrix and selecting one or more columns from the matrix. Other methods and apparatuses also are disclosed. | 2013-10-17 |
20130272441 | DISTINCT TRANSPORT PATH FOR MIMO TRANSMISSIONS IN DISTRIBUTED ANTENNA SYSTEMS - A hybrid expansion unit includes at least one digital communication interface adapted to communicate first and second sets of N-bit words of digitized spectrum with an upstream device. The hybrid expansion unit further includes at least one analog communication interface adapted to communicate first and second sets of bands of analog spectrum with a downstream device. The hybrid expansion unit is adapted to convert between the first set of N-bit words of digitized spectrum and the first set of bands of analog spectrum. The hybrid expansion unit is further adapted to convert between the second set of N-bit words of digitized spectrum and the second set of bands of analog spectrum. The first set of bands of analog spectrum occupy a first frequency range and the second set of bands of analog spectrum occupy a second frequency range. The first frequency range and the second frequency range do not overlap. | 2013-10-17 |
20130272442 | METHODS AND ARRANGEMENTS FOR WIDEBAND PRECODING - The present invention relates to a network node and a mobile node, and to related methods for wideband precoding. The methods comprise determining a phase compensation vector which is frequency dependent for the at least one predefined precoding weight vector in a precoding codebook for multi-antenna transmission. The methods further comprise determining a second precoding weight vector which is phase compensated by multiplying the at least one predefined precoding weight vector by the phase compensation vector. | 2013-10-17 |
20130272443 | METHODS AND APPARATUS TO IMPROVE CHANNEL ESTIMATION IN COMMUNICATION SYSTEMS - A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus generates a codeword, determines at least one puncture to the codeword based on allowing a legacy receiver to decode the codeword without knowledge of the at least one puncture, replaces each of the at least one puncture with a pilot, and transmits the codeword. The apparatus may also generate an IEEE 802.11 codeword having pilots in a first set of subcarriers, and puncture the codeword with additional pilots unknown to a legacy receiver in a second set of subcarriers. Accordingly, when an original set of pilot symbols is insufficient or inappropriately placed in a resource structure, a codeword may be transmitted with a new pilot structure capable of being decoded by legacy receivers not aware of the new pilot structure. | 2013-10-17 |
20130272444 | SPARSE SUPERPOSITION ENCODER AND DECODER FOR COMMUNICATIONS SYSTEM - A computationally feasible encoding and decoding arrangement and method for transmission of data over an additive white Gaussian noise channel with average codeword power constraint employs sparse superposition codes. The code words are linear combinations of subsets of vectors from a given dictionary, with the possible messages indexed by the choice of subset. An adaptive successive decoder is shown to be reliable with error probability exponentially small for all rates below the Shannon capacity. | 2013-10-17 |
20130272445 | PRECODING METHOD AND APPARATUS - A precoding method and apparatus are disclosed. The corresponding method includes: constructing a Lagrange function according to a precoding matrix, transmit power, a receive filter matrix and a weighting matrix, and obtaining a Lagrange multiplier by using the Lagrange function; updating the precoding matrix according to the Lagrange multiplier to obtain an iterative precoding matrix and an iterative receive filter matrix; obtaining an iterative Lagrange multiplier according to the iterative precoding matrix, the transmit power, the iterative receive filter matrix and the weighting matrix, and repeating the above steps in an iterative manner of updating the iterative precoding matrix according to the iterative Lagrange multiplier till the iterative precoding matrix converges to a threshold; and precoding information to be transmitted according to the iterative precoding matrix converging to the threshold. | 2013-10-17 |
20130272446 | HIGH SPEED SIGNALING SYSTEM WITH ADAPTIVE TRANSMIT PRE-EMPHASIS - A high-speed signaling system with adaptive transmit pre-emphasis. A transmit circuit has a plurality of output drivers to output a first signal onto a signal path. A receive circuit is coupled to receive the first signal via the signal path and configured to generate an indication of whether the first signal exceeds a threshold level. A first threshold control circuit is coupled to receive the indication from the receive circuit and configured to adjust the threshold level according to whether the first signal exceeds the threshold level. A drive strength control circuit is coupled to receive the indication from the receive circuit and configured to adjust a drive strength of at least one output driver of the plurality of output drivers according to whether the first signal exceeds the threshold level. | 2013-10-17 |
20130272447 | ADAPTIVE SPECTRAL ENHANCEMENT AND HARMONIC SEPARATION - A circuit and method perform adaptive spectral enhancement at a frequency ω1 (also called “fundamental” frequency) on an input signal y which includes electromagnetic interference (EMI) at an unknown frequency, to generate a fundamental-enhanced signal φ1 (or its complement). The fundamental-enhanced signal φ1 (or complement) is thereafter used in a notching circuit (also called “fundamental notching” circuit) to generate a fundamental-notched signal y-φ1. The fundamental-notched signal y-φ1 is itself enhanced to generate a harmonic-enhanced signal φ2 that is used to notch the fundamental-notched signal y-φ1 again, in one or more additional notching circuits that are connected in series with the fundamental notching circuit. The result (“cascaded-harmonic-notched” signal) is relatively free of EMI noise (fundamental and harmonics), and is used as an error signal for an adaptation circuit that in turn identifies the fundamental frequency ω1. Use of a cascaded-harmonic-notched signal as the error signal improves speed of convergence of adaptation. | 2013-10-17 |
20130272448 | BROADCAST SIGNAL TRANSMITTER/RECEIVER AND BROADCAST SIGNAL TRANSMITTING/RECEIVING METHOD - A broadcast signal transmitter according to one embodiment of the present invention comprises: an input signal generating unit which generates a first input signal and a second input signal; a MIMO encoder which performs MIMO processing of the first input signal and the second input signal to output a first transmission signal and a second transmission signal; and a first OFDM generator and a second OFDM generator which performs OFDM modulation of the first transmission signal and OFDM modulation of the second transmission signal. The MIMO processing applies a MIMO matrix to the first input signal and the second input signal. The MIMO matrix changes phases using a phase rotation matrix, and adjusts power of the first input signal and second input signal using parameter a, wherein the parameter is set to different values in accordance with the modulation types of the first input signal and second input signal. | 2013-10-17 |
20130272449 | GENERATING AND/OR RECEIVING, AT LEAST IN PART, SIGNAL THAT INCLUDES AT LEAST ONE WAVEFORM - An embodiment may include circuitry to generate and/or receive, at least in part, a signal that may include at least one waveform. The at least one waveform may include at least one portion followed by at least one other portion. The at least one portion may include a plurality of levels to be compared to data encoding levels to determine whether the plurality of levels satisfy ratios determined based at least in part upon the plurality of levels and the data encoding levels. The at least one other portion may include maximum and minimum data encoding levels to facilitate emphasis measurement. Many alternatives, variations, and modifications are possible. | 2013-10-17 |
20130272450 | SIGNAL PROCESSING APPARATUS AND SIGNAL PROCESSING METHOD - Disclosed herein is a signal processing apparatus including: a frequency multiplier configured to carry out an N-times frequency multiplication process on a modulated signal obtained as a result of an N phase shift keying modulation process in order to generate a multiplied frequency signal; and an oscillator configured to oscillate the multiplied frequency signal as an injected signal in order to generate a signal obtained by carrying out a by-N frequency division process on the multiplied frequency signal to serve as a reproduced carrier which is a carrier reproduced from the modulated signal. | 2013-10-17 |
20130272451 | APPARATUS AND METHOD OF TRANSMITTING HIERARCHICALLY MODULATED SIGNAL - An apparatus and a method of transmitting hierarchically modulated signals are provided. The present invention includes: a basic layer symbol generator generating a first layer signal; an enhancement layer symbol generator generating a second layer signal synchronized with the first layer signal and having different signal power; and a hierarchical modulator hierarchically modulating the first layer signal and the second layer signal, wherein the enhancement layer symbol generator performs constellation rotation rotating bundles configured as constellation points formed by the second layer signal based on constellation points of the first layer signal by a predetermined angle. According to the exemplary embodiment of the present invention, it is possible to improve the receiving performance of the second layer signals by applying the constellation rotation technology to the second layer signals in regards of the signal transmission system using the hierarchical modulation technology. | 2013-10-17 |
20130272452 | METHOD, APPARATUS AND SYSTEM FOR CARRIER FREQUENCY OFFSET ESTIMATION - Methods, system and apparatuses for carrier frequency offset estimation are disclosed. The method includes: receiving a preamble sequence r | 2013-10-17 |
20130272453 | OVERSAMPLING DIGITAL RECEIVER FOR RADIO-FREQUENCY SIGNALS - A system and method for receiving a radio frequency signal, comprising a device for digitizing, without prior alteration of frequency, an analog radio frequency representation of each of a plurality of radio frequency signals to produce a respective plurality of digital radio frequency signals having a respective associated radio frequency digital clock, the plurality of digital radio frequency signals having a sufficiently high respective associated clock rate to preserve an information content of an information communication present in the analog radio frequency representation; a switch matrix adapted to concurrently switch the plurality of digital radio frequency signals and associated digital radio frequency clock to ones of a plurality of digital signal processors; and a control adapted to selectively automatically control the concurrent switching of a plurality of digital signals and associated digital clock to the respective plurality of digital signal processors; wherein the digital signal processors produce processed representations of information contained in respective analog radio frequency representations. | 2013-10-17 |
20130272454 | DATA RECEIVING CIRCUIT, INFORMATION PROCESSING APPARATUS, A COMPUTER READABLE STORAGE MEDIUM, AND DATA RECEIVING METHOD - A data receiving circuit includes a generating unit that generates multiple clocks with different phases from one another. The data receiving circuit includes multiple acquiring units that acquire data from a received data signal by using different clocks from one another out of the multiple clocks generated by the generating unit. The data receiving circuit includes a determining unit that determines whether the data acquired by the multiple acquiring units are consistent. The data receiving circuit includes a correcting unit that corrects the phases of the multiple clocks in a direction in which data inconsistency does not occur when the determining unit has determined that there is data inconsistent with the other data in the data acquired by the multiple acquiring units. | 2013-10-17 |
20130272455 | SYSTEMS AND METHODS FOR CLOCK COMPENSATION - In a wireless communication system including a transmitter device and a receiver device, the receiver device may be configured to awake from a low power mode to receive beacons from the transmitter device. The receiver device may awaken an early reception interval prior to the beacon arrival time determined by the local clocks to account for inaccuracies in the local clocks and the transmitter clock. The early reception interval may be dynamically adjusted based upon an estimation of the clock errors to minimize the early reception interval. | 2013-10-17 |
20130272456 | DECODING APPARATUS AND DECODING METHOD FOR DECODING DATA ENCODED BY LDPC - A frame data storage unit inputs LDPC encoded data via a communication path. An estimation unit estimates, based on the inputted data, a situation of the communication path. A selection unit select, in accordance with the estimated situation of the communication path, one of a plurality of normalization constants that have been specified in advance and are to be used in updating an exterior value ratio based on a priori value ratio in check node processing according to a min-sum algorithm. A min-sum processing unit executes, on the inputted data, the min-sum algorithm by using the selected normalization constant. | 2013-10-17 |
20130272457 | GLOBAL NAVIGATION SATELLITES SYSTEM (GNSS) RECORDING SYSTEM - The present disclosure provides methods for improving processing of GNSS signals. More particularly, the method reduces a bit resolution of a digital signal, by processing, based on a maximum threshold value and on a s-bit resolution value, the digital signal received with an n-bit resolution to generate requantized digital signal with the s-bit resolution. The method further determines an optimal gain of a Global Navigation Satellites Systems Radio Frequency (RF) signal recorder, by determining a range of values of a gain of the RF signal recorder corresponding to a selected range of values of a total noise of the RF signal recorder and RF signal receiver. The method also automatically detects disconnection of a RF signal recorder from a Global Navigation Satellites Systems (GGSN) Radio Frequency (RF) signal receiver, and synchronizes multiple RF recording systems. | 2013-10-17 |
20130272458 | Communication Signal Decoding and Soft Demapping - Symbol detection and soft demapping methods and systems are provided. Individual subset symbol detection according to one or more embodiments involves identifying a search subset of a transmission symbol set for a transmission symbol. For each other transmission symbol in communication signals, multiple search subsets of the transmission symbol set are identified. The multiple search subsets include respective search subsets based on each transmission symbol in either the search subset for the first identified one of the transmission symbols or each of the multiple search subsets identified for a different one of the other transmission symbols. Symbol detection errors may be detected by identifying competing symbols and computing competing distances. Soft demapping may be provided by calculating soft decision results based on detected symbols and weighting the soft decision result. | 2013-10-17 |
20130272459 | RECEIVER RECEIVING METHOD, AND COMPUTER PROGRAM - A signal containing a frequency-domain channel estimation value is received and a time-domain channel estimation value is computed by way of DFT computations. An M | 2013-10-17 |
20130272460 | INTER CARRIER INTERFERENCE CANCELLATION FOR ORTHOGONAL FREQUENCY DOMAIN MULTIPLEXING RECEIVERS - Apparatus and methods are described to perform inter carrier interference (ICI) reduction or cancellation in an orthogonal frequency domain multiplexing (OFDM) receiver. A first and a second stage of ICI cancellation may be performed before inputting an estimated transmitted data carrier for forward error correction. Forward error correction may include a signal re-correction and reconstruction of the estimated transmitted data carrier prior to a further stage of ICI cancellation. | 2013-10-17 |
20130272461 | DEVICE, SYSTEM AND METHOD OF PROCESSING SINGLE-CARRIER WIRELESS COMMUNICATION SIGNALS - Some demonstrative embodiments include devices, systems and/or methods of processing single-carrier wireless communication signal. For example, a device may include a receiver to receive an analog single-carrier wireless communication signal representing a first plurality of time-domain samples at a first sampling rate; to convert the analog single-carrier wireless communication signal into a digital signal including a second plurality of time-domain samples at a second sampling rate, which is greater than the first sampling rate; to convert the second plurality of time-domain samples into a first plurality of frequency-domain samples; and to map the first plurality of frequency-domain samples into a second plurality of frequency-domain samples at the first sampling rate. | 2013-10-17 |
20130272462 | METHOD AND APPARATUS FOR MULTIPLE ANTENNA COMMUNICATIONS, AND RELATED SYSTEMS AND COMPUTER PROGRAM - An embodiment of an arrangement detects sequences of digitally modulated symbols from multiple sources. The arrangement identifies a suitable set of candidate values for at least one transmitted sequence of symbols and determines for each candidate value a set of sequences of transmitted symbols. The arrangement estimates at least one further set of sequences of transmitted symbols, calculates a metric for each sequence of transmitted symbols, and selects the sequence that maximizes the metric. At the end, a-posteriori bit soft output information for the selected sequence is calculated from the metrics for said sequences. Generally, these calculations are based on the information coming from a channel-state-information matrix and a-priori information on the modulated symbols from a second module, such as a forward error-correction-code (ECC) decoder. | 2013-10-17 |
20130272463 | DISTRIBUTED DIGITAL REFERENCE CLOCK - A communication system includes master host unit, hybrid expansion unit, and remote antenna unit. Master host unit communicates analog signals with service provider interfaces. Master host unit and hybrid expansion unit communicate N-bit words of digitized spectrum over communication link. Hybrid expansion unit converts between N-bit words and analog spectrum. Hybrid expansion unit and remote antenna unit communicate analog spectrum over analog communication medium. Remote antenna unit transmits and receives wireless signals over air interfaces. Master host unit includes master clock distribution unit that generates digital master reference clock signal. Master host unit communicates digital master reference clock signal over communication link. Hybrid expansion unit receives digital master reference clock signal from master host unit over communication link and generates analog reference clock signal based on digital master reference clock signal. Hybrid expansion unit sends, and remote antenna unit receives, analog reference clock signal across analog communication medium. | 2013-10-17 |
20130272464 | CONTROL ROD ASSEMBLY IMPACT LIMITER - A control rod assembly including at least one movable control rod including a neutron absorbing material, a control rod drive mechanism (CRDM) for controlling movement of the at least one control rod, and a coupling operatively connecting the at least one control rod and the CRDM. The coupling includes a terminal element engaged with a connecting rod of the CRDM and the at least one moveable control rod, and a kinetic energy absorbing element supported by the terminal element for absorbing kinetic energy during a SCRAM event, the kinetic energy absorbing element configured to act between the terminal element and an upper plate of an associated fuel assembly. | 2013-10-17 |
20130272465 | POWER DISTRIBUTION PLATE FOR POWERING INTERNAL CONTROL ROD DRIVE MECHANISM (CRDM) UNITS - A power distribution plate (PDP) sits on top of a support plate. Control rod drive mechanism (CRDM) units are mounted on top of the PDP, but the PDP is incapable of supporting the weight of the CRDM units and instead transfers the load to a support plate. The PDP has receptacles which receive cable modules each including mineral insulated (MI) cables, the MI cables being connected with the CRDM units. The PDP may further include a set of hydraulic lines underlying the cable modules and connected with the CRDM units. The cable modules in their receptacles define conduits or raceways for their MI cables and for any underlying hydraulic lines. | 2013-10-17 |
20130272466 | CRDM Divert Valve - A valve for controlling flow of high pressure fluid to a CRDM hydraulic latching mechanism of a nuclear reactor core. The valve includes a valve body having an inlet for receiving fluid from a fluid source, an outlet, and a dump port for dumping fluid backflow. A valve member is movable within the valve body between a first position restricting flow between the outlet and the dump port such that high pressure fluid entering the valve body through the inlet exits the valve body through the outlet, and a second position whereat the dump port is in fluid communication with the outlet such that at least a portion of any backflow fluid flowing back into the valve body via the outlet exits the valve body via the dump port. | 2013-10-17 |
20130272467 | INCORE INSTRUMENTATION CABLE ROUTING AND SUPPORT ELEMENT FOR PRESSURIZED WATER REACTOR - A nuclear reactor comprises a pressure vessel, a nuclear reactor core comprising fissile material disposed in the pressure vessel, and a core basket disposed in the pressure vessel and containing the nuclear reactor core. An incore instrument is disposed in a guide tube of the nuclear reactor core. The incore instrument has a cable extending out of the bottom of the nuclear reactor core and making a 180° turn. A bottom support element is attached to the bottom of the core basket and defines or includes a routing tube that routes the cable of the incore instrument through the 180° turn. In some embodiments, the pressure vessel includes upper and lower vessel portions, the nuclear reactor core and core basket are disposed in the lower vessel portion, and the vessel penetration is through the lower vessel portion or through a mid-flange connecting the upper and lower vessel portions. | 2013-10-17 |
20130272468 | IN-SITU AND EXTERNAL NUCLEAR REACTOR SEVERE ACCIDENT TEMPERATURE AND WATER LEVEL PROBES - A system for monitoring a state of a reactor core in a nuclear reactor may include an internal monitoring device located inside the reactor core, the internal monitoring device including one or more internal sensor arrays configured to take measurements of conditions of the reactor core at different vertical regions within the reactor core to generate internal measurement data; an external monitoring device located in the reactor structure outside the reactor core, the external monitoring device including one or more external sensor arrays configured to take measurements of conditions of the reactor core at positions outside the reactor core corresponding the plurality of different vertical regions within the reactor core to generate external measurement data, and a transmitter configured to wirelessly transmit the external measurement data; and a receiver station configured to determine a state of the reactor core based on the external and internal measurement data. | 2013-10-17 |
20130272469 | DEVICE AND METHOD FOR REACTOR AND CONTAINMENT MONITORING - A device for monitoring a reactor during normal and off-normal operating conditions may include a case formed of a rigid material, the case including a shielding layer configured to insulate an internal portion of the device from external heat and radiation; a coupling unit configured to adhere the case to a surface location of a reactor; a sensing unit configured to generate environmental measurements by measuring environmental conditions in the vicinity of the reactor; a data processing unit configured to generate measurement data by processing the environmental measurements; a transmitter configured to transmit the measurement data externally from the device; and a power unit configured to power the device independently of an external power source. | 2013-10-17 |
20130272470 | Radial Neutron Reflector - A nuclear reactor core comprising fissile material is surrounded by a core former. The core former comprises one or more single-piece annular rings wherein each single-piece annular ring comprises neutron-reflecting material. In some embodiments the core former comprises a stack of two or more such single-piece annular rings. In some embodiments the stack of single-piece annular rings is self-supporting. In some embodiments the stack of single-piece annular rings does not include welds or fasteners securing adjacent single-piece annular rings together. A core basket may contain the nuclear reactor core and the core former, and in some embodiments an annular gap is defined between the core former and the core basket. In some embodiments the core former does not include welds and does not include fasteners. | 2013-10-17 |
20130272471 | ISLAND MODE FOR NUCLEAR POWER PLANT - A nuclear power plant comprises a pressurized water reactor (PWR) and a steam generator driving a turbine driving an electric generator. A condenser condenses steam after flowing through the turbine. Responsive to a station blackout, the nuclear power plant is electrically isolated and a bypass valve is opened to convey bypass steam flow from the steam generator to the condenser without flowing through the turbine. The thermal power output of the PWR is gradually reduced over the transition time interval. After opening, the bypass valve is gradually closed over the transition time interval. A supplemental bypass valve may also be opened responsive to the station blackout to convey supplemental bypass steam flow from the steam generator to a feedwater system supplying secondary coolant feedwater to the steam generator. The supplemental bypass steam flow does not flow through the turbine and does not flow through the condenser. | 2013-10-17 |
20130272472 | MOLTEN-CORE RETENTION STRUCTURE - According to an embodiment, a molten-core retention structure comprises the following inside a reactor vessel that contains a reactor core: a bottom support plate, in which vertically penetrating flow holes are formed, that is provided beneath the core and supports the core; a bottom support plate support that is affixed to the reactor vessel and supports the bottom support plate; a thermally insulating spacer; a reticulated heat path that is affixed to the bottom support plate support with the thermally insulating spacer interposed therebetween and contacts the bottom support plate; and vertical heat paths that extend downwards from the reticulated heat path. The reticulated heat path and the vertical heat paths have higher coefficients of thermal conductivity than the thermally insulating spacer. | 2013-10-17 |
20130272473 | AUXILIARY CONDENSER SYSTEM FOR DECAY HEAT REMOVAL IN A NUCLEAR REACTOR - A nuclear reactor includes an internal steam generator and a nuclear core disposed in a containment structure. A condenser is disposed outside the containment structure, and includes a condenser inlet line tapping off a steam line connected to the steam generator outside the containment structure, and a condensate injection line conveying condensate from the condenser to the integral steam generator. Isolation valves are located outside the containment structure on a feedwater line, the steam line, and the condensate injection line. The valves have an operating configuration in which the isolation valves on the feedwater and steam lines are open and the isolation valve on the condensate injection line is closed, and a heat removal configuration in which the isolation valves on the feedwater and steam lines are closed and the isolation valve on the condensate injection line is open. | 2013-10-17 |
20130272474 | PASSIVE CONTAINMENT AIR COOLING FOR NUCLEAR POWER PLANTS - An enhanced passive containment air cooling system for a nuclear power plant that increases the heat transfer surface on the exterior of the nuclear plant's containment vessel. The increased surface area is created by forming a tortuous path in or on at least a substantial part of the exterior surface of the containment vessel over which a cooling fluid can flow and follow the tortuous path. The tortuous path is formed from a series of indentations and protrusions in or on the exterior surface that form a circuitous path for the cooling fluid. | 2013-10-17 |
20130272475 | PASSIVE CONTAINMENT AIR COOLING FOR NUCLEAR POWER PLANTS - A passive containment air cooling system for a nuclear power plant that enhances air flow over a metal containment that houses the reactor system to improve heat transfer out of the containment. The heat transfer is improved by employing swirl vanes to mix the air as it rises over the walls of the containment due to natural circulation and a vortex engine proximate an exit along the cooling air path to increase the quantity of air drawn along the containment. | 2013-10-17 |
20130272476 | METHOD FOR PROTECTING COMPONENTS OF A PRIMARY SYSTEM OF A BOILING WATER REACTOR IN PARTICULAR FROM STRESS CORROSION CRACKING - A method for protecting the components of the primary system of a boiling water reactor, especially against stress cracking corrosion, includes feeding a reducing agent into the primary coolant in order to reduce the number of substances having a oxidizing effect or in order to modify the electrochemical potential of the component surfaces covered with an oxide layer to negative values. An alcohol that can be oxidized in the conditions of a reactor is fed in as a reducing agent, preferably in a liquid form, into the primary coolant. The component surfaces are provided with a blank coating or a single intrinsic oxide coating. | 2013-10-17 |
20130272477 | Pressurized Water Reactor with Skirted Lower End Fitting and Filter Plate - In a nuclear reactor core having fuel assemblies with upper and lower end fittings, a debris filter plate is attached to a lower end fitting having a skirt. The filter prevents debris from entering the fuel assembly, while the skirt prevents the trapped debris from sliding off the lower end fitting and continuing into the core. The lower end fitting is formed from a substantially square base and has flow channels to allow coolant to flow through it to the fuel assembly. The skirt is an extension of the metal of the lower end fitting that extends around the perimeter of the lower end fitting, spanning all four corners of the lower end fitting. In addition to capturing debris, the skirt also positions the filter, which may be manufactured from the same metal as the lower end fitting. | 2013-10-17 |