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公开(公告)号：US20220094927A1
公开(公告)日：2022-03-24
申请号：US17541038
申请日：2021-12-02
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/119 , H04N19/176 , H04N19/159 , H04N19/139 , H04N19/186 , H04N19/105 , H04N19/593
Abstract: A method of video processing includes determining, for a conversion between a current block of a video and a bitstream of the video, that the current block is split into multiple sub-blocks, wherein at least one of the multiple blocks is coded using a modified intra-block copy (IBC) coding technique that uses reference samples from one or more video regions from a current picture of the current block; and performing the conversion based on the determining.
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公开(公告)号：US20220094917A1
公开(公告)日：2022-03-24
申请号：US17541069
申请日：2021-12-02
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/107 , H04N19/176 , H04N19/117 , H04N19/119
Abstract: A method of video processing includes determining, for a conversion between a current block of a video and a bitstream of the video, that the current block is split into multiple sub-blocks, wherein each of the multiple sub-blocks is coded in the bitstream using a corresponding coding technique according to a pattern, and performing the conversion based on the determining.
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公开(公告)号：US20220070490A1
公开(公告)日：2022-03-03
申请号：US17523232
申请日：2021-11-10
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/563 , H04N19/513 , H04N19/176 , H04N19/132 , H04N19/105 , H04N19/159
Abstract: A video processing method is provided to include determining, for a current video block of a video, a final prediction block for the current video block by refining one or more initial predictions for the current video block using an optical flow calculation based on a gradient of initial prediction samples according to a precision rule; and performing a conversion between the current video block and a coded representation using the final prediction block, wherein the optical flow calculation includes a prediction refinement with optical flow (PROF) procedure or a bi-directional optical flow (BDOF) procedure, wherein the precision rule specifies to use a same precision for representing the gradient for both the PROF procedure and the BDOF procedure.
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公开(公告)号：US20220060692A1
公开(公告)日：2022-02-24
申请号：US17519310
申请日：2021-11-04
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/51
Abstract: A video processing method is provided to include determining, for a conversion between a current video block of a current picture of a video and a coded representation of the video, that use of a coding tool is disabled for the current video block due to use of a reference picture having a dimension different from a dimension of the current picture for coding of the current video block into the coded representation; and performing the conversion based on the determining.
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公开(公告)号：US20220038706A1
公开(公告)日：2022-02-03
申请号：US17502258
申请日：2021-10-15
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/132 , H04N19/105 , H04N19/159 , H04N19/176
Abstract: Techniques, devices, and systems for video processing are described. In one example aspect, a video processing method includes determining, for a conversion between a block of a video and a bitstream representation of the video, a manner in which information for a Matrix-based Intra Prediction (MIP) coding technique is coded in the bitstream representation. A prediction block of the block is determined using the MIP coding technique based on performing a matrix vector multiplication operation on previously coded samples of the video. The method also includes performing the conversion based on the determining.
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Patent Agency Ranking
公开(公告)号：US20220030267A1
公开(公告)日：2022-01-27
申请号：US17487200
申请日：2021-09-28
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/52 , H04N19/105 , H04N19/117 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/132 , H04N19/159 , H04N19/30 , H04N19/70
Abstract: A method for video processing is provided to include: performing a conversion between a current video block of a video that is a chroma block and a coded representation of the video, wherein, during the conversion, the current video block is constructed based on a first domain and a second domain, and wherein the conversion further includes applying a forward reshaping process and/or an inverse reshaping process to one or more chroma components of the current video block.
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公开(公告)号：US20220030257A1
公开(公告)日：2022-01-27
申请号：US17494974
申请日：2021-10-06
Inventor： Zhipin DENG , Li ZHANG , Hongbin LIU , Kai ZHANG , Jizheng XU
IPC: H04N19/186 , H04N19/593
Abstract: A method for visual media processing, including: using a rule that specifies representing, based on a fixed value, a chroma residual scaling factor for at least one chroma block associated with a current video unit of visual media data, wherein the fixed value is based at least on one or more conditions; and performing a conversion between the current video unit and a bitstream representation of the current video unit.
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公开(公告)号：US20220030240A1
公开(公告)日：2022-01-27
申请号：US17473366
申请日：2021-09-13
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Weijia ZHU , Yue WANG
IPC: H04N19/122 , H04N19/119 , H04N19/176 , H04N19/13 , H04N19/157 , H04N19/105 , H04N19/70
Abstract: A method for video processing includes determining, based on a first indication, whether a sub-block residual coding scheme is applied to residual of a current video block in a transform skip mode, the sub-block residual coding scheme splitting the residual of the current video block into multiple sub-blocks and a subset of the multiple sub-blocks have non-zero coefficients; determining, based on a second indication, a specific split pattern to be applied to the residual of the current video block, in response to the sub-block residual coding scheme being applied to the residual of the current video block; deriving, based on a third indication, the subset of the multiple sub-blocks which have non-zero coefficients; and performing a conversion on the residue of the current video block based on the determined subset of sub-blocks having non-zero coefficients.
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公开(公告)号：US20220014734A1
公开(公告)日：2022-01-13
申请号：US17484636
申请日：2021-09-24
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/132 , H04N19/117 , H04N19/80 , H04N19/176
Abstract: A method of video processing is provided to include: maintaining, prior to a conversion between a current video block of a video region and a coded representation of the video, at least one history-based motion vector prediction (HMVP) table, wherein the HMVP table includes one or more entries corresponding to motion information of one or more previously processed blocks; and performing the conversion using the at least one HMVP table; and wherein the motion information of each entry is configured to include interpolation filter information for the one or more previously processed blocks, wherein the interpolation filter information indicates interpolation filters used for interpolating prediction blocks of the one or more previously processed blocks.
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公开(公告)号：US20220007057A1
公开(公告)日：2022-01-06
申请号：US17473440
申请日：2021-09-13
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Weijia ZHU , Yue WANG
IPC: H04N19/60 , H04N19/119 , H04N19/14 , H04N19/176
Abstract: A method for video processing includes applying a sub-block residual coding scheme to a current video block, wherein the residual of the current video block is split into a plurality of sub-blocks each having a size of M*N, determining at least one sub-block with non-zero coefficients based on characteristic associated with each of the plurality of sub-blocks; coding the residue of the current video block based on the derived at least one sub-block with non-zero coefficients.
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