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公开(公告)号：US10200719B2
公开(公告)日：2019-02-05
申请号：US15359568
申请日：2016-11-22
发明人： Li Zhang , Xiang Li , Jianle Chen , Wei-Jung Chien , Xin Zhao , Marta Karczewicz
IPC分类号： H04N19/60 , H04N19/119 , H04N19/61 , H04N19/91 , H04N19/176 , H04N19/587 , H04N19/124 , H04N19/13 , H04N19/186 , H04N19/573 , H04N19/59 , H04N19/96 , G06F17/14 , H04N19/597 , H04N19/105 , H04N19/122 , H04N19/593 , H04N19/132 , H04N19/82 , H04N19/42 , H04N19/625
摘要： As part of a process of encoding video data, a video encoder applies a transform to a non-square residual block to generate a block of transform coefficients. Furthermore, the video encoder modifies the transform coefficients such that each respective transform coefficient of the block of transform coefficients is based on the respective dequantized transform coefficient multiplied by a factor of √{square root over (2)} or an approximation of √{square root over (2)}. As part of a process of decoding video data, a video decoder applies, by the video decoder, a dequantization process to transform coefficients of a non-square transform block. The video decoder modifies the dequantized transform coefficients such that each respective dequantized transform coefficient of the dequantized transform coefficients is based on the respective dequantized transform coefficient divided by a factor of √{square root over (2)} or an approximation of √{square root over (2)}.
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公开(公告)号：US10200711B2
公开(公告)日：2019-02-05
申请号：US15080478
申请日：2016-03-24
发明人： Xiang Li , Ying Chen , Li Zhang , Hongbin Liu , Jianle Chen , Marta Karczewicz
IPC分类号： H04N7/12 , H04N19/513 , H04N19/70 , H04N19/119 , H04N19/139 , H04N19/176 , H04N19/44 , H04N19/52 , H04N19/56 , H04N19/46 , H04N19/96 , H04N19/109 , H04N19/57
摘要： In an example, a method of processing video data includes determining a candidate motion vector for deriving motion information of a current block of video data, where the motion information indicates motion of the current block relative to reference video data. The method also includes determining a derived motion vector for the current block based on the determined candidate motion vector, where determining the derived motion vector comprises performing a motion search for a first set of reference data that corresponds to a second set of reference data outside of the current block.
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公开(公告)号：US10158876B2
公开(公告)日：2018-12-18
申请号：US14247928
申请日：2014-04-08
IPC分类号： H04N19/52 , H04N19/597
摘要： In one example, a device for coding video data includes a video coder configured to code motion information for a block of multiview video data, wherein the motion information includes a reference index that identifies a reference picture comprising a source for backward-warping view synthesis prediction (BVSP), perform BVSP on a portion of the reference picture to produce a BVSP reference block, and predict the block using the BVSP reference block.
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公开(公告)号：US20180324464A1
公开(公告)日：2018-11-08
申请号：US15973347
申请日：2018-05-07
发明人： Li Zhang , Nan Hu , Wei-Jung Chien , Marta Karczewicz
IPC分类号： H04N19/61 , H04N19/70 , H04N19/176 , H04N19/186 , H04N19/103 , H04N19/159
CPC分类号： H04N19/61 , H04N19/103 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/70
摘要： A device for coding video data is configured to code a first syntax element, wherein a value for the first syntax element indicates whether there is at least one non-zero transform coefficient level associated with a first block of video data; determine a context for a second syntax element based on the value for the first syntax element, wherein the second syntax element indicates coding mode information for a second block of video data; and code the second syntax element based on the determined context.
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公开(公告)号：US20180220130A1
公开(公告)日：2018-08-02
申请号：US15879359
申请日：2018-01-24
发明人： Li Zhang , Jianle Chen , Wei-Jung Chien , Marta Karczewicz
IPC分类号： H04N19/117 , H04N19/176 , H04N19/14 , H04N19/159 , H04N19/186 , H04N19/82
摘要： An example method of filtering a reconstructed block of video data includes obtaining, by one or more processors, reconstructed samples of a current block of the video data; and selectively bilaterally filtering, by the one or more processors, the reconstructed samples of the current block to generate a filtered current block. In this example, selectively bilaterally filtering the reconstructed samples of the current block comprises refraining from bilaterally filtering at least one reconstructed sample of the current block such that the filtered current block includes at least one non-bilaterally filtered sample.
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公开(公告)号：US20180205946A1
公开(公告)日：2018-07-19
申请号：US15868821
申请日：2018-01-11
发明人： Li Zhang , Wei-Jung Chien , Xin Zhao , Marta Karczewicz
IPC分类号： H04N19/103 , H04N19/136 , H04N19/593
CPC分类号： H04N19/103 , H04N19/11 , H04N19/136 , H04N19/157 , H04N19/186 , H04N19/593
摘要： An example device for decoding video data includes a memory for storing video data, and one or more processors implemented in circuitry and configured to construct an intra-prediction candidate list for a current chroma block of the video data indicating candidate intra-prediction modes for the current chroma block, wherein the intra-prediction candidate list indicates a subset of allowed luminance (luma) candidate intra-prediction modes, determine cost (e.g., sum of absolute transform difference (SATD)) values for each of the candidate intra-prediction modes in the intra-prediction candidate list for the current chroma block, and generate a prediction block for the current chroma block using one of the candidate intra-prediction modes indicated by the intra-prediction candidate list according to the cost values (e.g., the candidate intra-prediction mode having the lowest cost value).
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公开(公告)号：US20180184127A1
公开(公告)日：2018-06-28
申请号：US15851358
申请日：2017-12-21
发明人： Li Zhang , Wei-Jung Chien , Marta Karczewicz
IPC分类号： H04N19/82 , H04N19/124 , H04N19/176 , H04N19/61
CPC分类号： H04N19/82 , H04N19/117 , H04N19/124 , H04N19/137 , H04N19/157 , H04N19/159 , H04N19/176 , H04N19/182 , H04N19/197 , H04N19/436 , H04N19/44 , H04N19/463 , H04N19/537 , H04N19/593 , H04N19/61 , H04N19/70 , H04N19/80 , H04N19/86 , H04N19/91
摘要： A device for decoding video data is configured to determine weights for use in a bilateral filter for a current block of a current picture of the video data; apply the bilateral filter to a current sample of the current block, wherein the current sample is located inside a transform unit boundary, wherein applying the bilateral filter to the current sample comprises: assigning the weights to neighboring samples of the current sample of the current block, wherein the neighboring samples of the current sample include a neighboring sample located outside the transform unit; and modifying a sample value for the current sample based on sample values of the neighboring samples and the weights assigned to the neighboring samples; and based on the modified sample value for the current sample, outputting a decoded version of the current picture.
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公开(公告)号：US09967592B2
公开(公告)日：2018-05-08
申请号：US14592633
申请日：2015-01-08
IPC分类号： H04N19/577 , H04N19/52 , H04N19/597
CPC分类号： H04N19/577 , H04N19/52 , H04N19/597
摘要： Techniques for advanced residual prediction (ARP) in video coding may include receiving a first encoded block of video data in a first access unit, wherein the first encoded block of video data was encoded using advanced residual prediction and bi-directional prediction, determining temporal motion information for a first prediction direction of the first encoded block of video data, and identifying reference blocks for a second prediction direction, different than the first prediction direction, using the temporal motion information determined for the first prediction direction, wherein the reference blocks are in a second access unit.
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公开(公告)号：US09948939B2
公开(公告)日：2018-04-17
申请号：US14098344
申请日：2013-12-05
发明人： Li Zhang , Ying Chen , Marta Karczewicz
IPC分类号： H04N7/12 , H04N19/31 , H04N19/597 , H04N19/105 , H04N19/176 , H04N19/70 , H04N19/30 , H04N19/61 , H04N19/103 , H04N19/107 , H04N19/136 , H04N19/187 , H04N19/577
CPC分类号： H04N19/31 , H04N19/103 , H04N19/105 , H04N19/107 , H04N19/136 , H04N19/176 , H04N19/187 , H04N19/30 , H04N19/577 , H04N19/597 , H04N19/61 , H04N19/70
摘要： In an example, a method of coding video data includes determining a location of a temporal reference block indicated by a temporal motion vector to a current block of video data, where the current block and the temporal reference block are located in a first layer of video data. The method also includes interpolating, with a first type of interpolation, a location of a disparity reference block indicated by a disparity vector of the current block, where the disparity reference block is located in a second, different layer, and where the first type of interpolation comprises a bi-linear filter. The method also includes determining a temporal-disparity reference block of the disparity reference block indicated by a combination of the temporal motion vector and the disparity vector, and coding the current block based on the temporal reference block, the disparity reference block, and the temporal-disparity reference block.
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公开(公告)号：US20180084260A1
公开(公告)日：2018-03-22
申请号：US15701711
申请日：2017-09-12
发明人： Wei-Jung Chien , Yi-Wen Chen , Li Zhang , Marta Karczewicz
IPC分类号： H04N19/176 , H04N19/44 , H04N19/513 , H04N19/139 , H04N19/105
CPC分类号： H04N19/105 , H04N19/139 , H04N19/44 , H04N19/513 , H04N19/52 , H04N19/521 , H04N19/70
摘要： In one example, a method includes receiving, in a coded video bitstream and for a current prediction unit (PU) of a current picture of video data, a representation of an offset vector that identifies a block of a reference picture, wherein the offset vector is within a set of values that are not uniformly distributed; determining, based on the block of the reference picture identified by the offset vector, motion information for the current PU; and reconstructing the current PU based on the determined motion information.
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