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公开(公告)号：US20230060824A1
公开(公告)日：2023-03-02
申请号：US17580446
申请日：2022-01-20
发明人： Weijia ZHU , Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Yue WANG
IPC分类号： H04N19/159 , H04N19/139 , H04N19/105 , H04N19/186 , H04N19/176
摘要： Devices, systems and methods for video processing are described. An example method for video processing includes performing a conversion between a video comprising luma blocks and corresponding chroma blocks and a bitstream representation of the video according to a rule that specifies that, for a case that a current luma block is coded using a palette coding mode and a corresponding current chroma block coded with a derived mode, the current luma block is treated as having a default intra prediction mode and the current chroma block is coded with the default intra prediction mode.
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公开(公告)号：US20220353494A1
公开(公告)日：2022-11-03
申请号：US17852143
申请日：2022-06-28
发明人： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC分类号： H04N19/105 , H04N19/176 , H04N19/423 , H04N19/593
摘要： A method of visual media processing includes determining, for a conversion between a current video block of visual media data and a bitstream representation of the current video block, a buffer that stores reference samples for prediction in an intra block copy mode; for a sample spatially located at location of the current video block relative to an upper-left position of a coding tree unit including the current video block and having a block vector, computing a corresponding reference in the buffer at a reference location, wherein the reference location is determined using the block vector and the location; and upon determining that the reference location lies outside the buffer, re-computing the reference location based at least in part on a location of the current video block relative to the coding tree unit including the current video block.
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公开(公告)号：US20220337867A1
公开(公告)日：2022-10-20
申请号：US17853076
申请日：2022-06-29
发明人： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Yue WANG
IPC分类号： H04N19/52 , H04N19/176 , H04N19/159 , H04N19/139 , H04N19/132 , H04N19/119 , H04N19/105 , H04N19/46
摘要： Motion vector difference for block with geometric partition is described. One example method of video processing includes determining, for a conversion between a current video block of a video and a bitstream of the current video, that the current video block is coded with a geometric partitioning mode; deriving at least one refined motion vector (MV) for the current video block by adding at least one motion vector difference (MVD) of multiple MVDs signaled or derived for the current video block to a MV derived from a merge candidate associated with the current video block; and performing the conversion based on the refined MV.
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公开(公告)号：US20220329842A1
公开(公告)日：2022-10-13
申请号：US17838498
申请日：2022-06-13
发明人： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC分类号： H04N19/513 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176
摘要： Devices, systems and methods for sample refinement and filtering method for video coding are described. In an exemplary aspect, a method for video processing includes modifying for a conversion between a block of a video and a bitstream representation of the video, a refinement value for a prediction sample in the block by applying a clipping operation to refinement value. The refinement value is derived based on a gradient value of an optical flow coding process. An output of the clipping operation is within a range. The method also includes refining the prediction sample based on the refinement value and performing the conversion based on the refined prediction sample.
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公开(公告)号：US20220312008A1
公开(公告)日：2022-09-29
申请号：US17837216
申请日：2022-06-10
发明人： Yang WANG , Li ZHANG , Hongbin LIU , Kai ZHANG , Zhipin DENG , Yue WANG
IPC分类号： H04N19/117 , H04N19/186 , H04N19/96
摘要： A method for video processing is described. The method includes determining, for a conversion between a video unit of a video and a bitstream representation of the video, whether to enable a mirrored padding process for padding an unavailable luma sample during an application of a loop filtering tool to the video unit; and performing the conversion based on the determining.
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公开(公告)号：US20220303571A1
公开(公告)日：2022-09-22
申请号：US17831074
申请日：2022-06-02
发明人： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC分类号： H04N19/517 , H04N19/176 , H04N19/70
摘要： A method of visual media processing, includes: performing a conversion between a current video block of a visual media data and a bitstream representation of the visual media data according to a modification rule, wherein the current video block is coded using affine motion information; wherein the modification rule specifies to modify an affine motion information coded in the bitstream representation using motion vector differences and/or reference picture indices during decoding.
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公开(公告)号：US20220303533A1
公开(公告)日：2022-09-22
申请号：US17824304
申请日：2022-05-25
发明人： Zhipin DENG , Li ZHANG , Hongbin LIU , Kai ZHANG , Jizheng XU , Yang WANG , Yue WANG
IPC分类号： H04N19/119 , H04N19/137 , H04N19/132 , H04N19/176 , H04N19/70
摘要： A method of video processing is provided to comprise: performing a conversion between a current video block of a video and a bitstream representation of the video, wherein, during the conversion, a use of a geometric partitioning mode is allowed for the current video block, and wherein parameters of the geometric partitioning mode are computed using a set of angles including a first number of angles that is less than a first threshold value and/or a set of distances including a second number of distances that is less than a second threshold value.
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公开(公告)号：US20220279167A1
公开(公告)日：2022-09-01
申请号：US17735483
申请日：2022-05-03
发明人： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC分类号： H04N19/105 , H04N19/137 , H04N19/30 , H04N19/132 , H04N19/139 , H04N19/513
摘要： Video coding and decoding in which the bitstream is generated using affine motion compensation mode are described. One example includes generating, for a reconstruction of a current video unit, a list of affine motion vector prediction candidates in which each candidate in the list is calculated without using a clipping operation, wherein the clipping operation limits a magnitude of the candidate motion vectors to a range; and performing the reconstruction of the current video unit using the list of affine motion vector prediction candidates.
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公开(公告)号：US20220264143A1
公开(公告)日：2022-08-18
申请号：US17652184
申请日：2022-02-23
发明人： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
摘要： A method of video processing is described. The method of video processing includes: constructing, for a conversion between a current video block of a current picture of a video and a coded representation of the video, a history-based motion vector predictor (HMVP) table according to a rule, and performing the conversion using the HMVP table, wherein the current video block is coded in the coded representation using a block vector that represents a displacement between the current video block and a region in the current picture used for predicting the current video block; wherein the rule specifies that the constructing uses block vector information of previously processed video blocks in the HMVP table.
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公开(公告)号：US20220264137A1
公开(公告)日：2022-08-18
申请号：US17718785
申请日：2022-04-12
发明人： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Jizheng XU , Yue WANG
IPC分类号： H04N19/46 , H04N19/70 , H04N19/159 , H04N19/176
摘要： An example method of video processing includes performing a conversion between a video picture of a video and a bitstream representation of the video. The bitstream representation conforms to a format rule. The format rule specifies that applicability of a Decoder-side Motion Vector Refinement coding tool and a Bi-Directional Optical Flow coding tool for the video picture are indicated separately in the bitstream representation.
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