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公开(公告)号：US20230007261A1
公开(公告)日：2023-01-05
申请号：US17470095
申请日：2021-09-09
Inventor： Weijia ZHU , Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/132 , H04N19/105 , H04N19/159 , H04N19/70 , H04N19/46 , H04N19/186 , H04N19/176
Abstract: A method of visual media processing video, includes determining that palette mode is to be used for processing a first portion of a video block and intra block copy (IBC) mode is to be used for processing a second portion of the video block, and performing further processing of the first portion of the video block using the palette mode and the second portion of the video using the IBC mode, wherein indications of the first portion of the video block processed using the palette mode and indications of the second portion of the video block processed using the IBC mode are included in a palette index identifying the first portion of the video block and the second portion of the video block.
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公开(公告)号：US20220109852A1
公开(公告)日：2022-04-07
申请号：US17551392
申请日：2021-12-15
Inventor： Jizheng XU , Li ZHANG , Weijia ZHU , Kai ZHANG , Hongbin LIU
IPC: H04N19/139 , H04N19/176 , H04N19/159 , H04N19/96 , H04N19/593
Abstract: Interaction between screen content coding tools and motion information is disclosed. A method of video processing includes modifying, for a conversion between a block of a video and a bitstream representation of the block, at least one of motion information associated with the block which is coded with intra block copy (IBC) mode; and performing the conversion based on the modified motion information.
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公开(公告)号：US20220086447A1
公开(公告)日：2022-03-17
申请号：US17532491
申请日：2021-11-22
Inventor： Jizheng XU , Weijia ZHU , Li ZHANG , Kai ZHANG , Hongbin LIU
IPC: H04N19/132 , H04N19/105 , H04N19/159 , H04N19/186 , H04N19/176
Abstract: Combined intra and intra-block copy prediction for video coding is disclosed. A video processing method includes generating, for a conversion between a block of a video and a bitstream representation of the block, prediction for the block with a combined method which uses intra block copy (IBC) prediction and intra prediction in combination; and performing the conversion based on the prediction.
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公开(公告)号：US20230291894A1
公开(公告)日：2023-09-14
申请号：US18321426
申请日：2023-05-22
Inventor： Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Weijia ZHU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/186 , H04N19/189
CPC classification number: H04N19/105 , H04N19/176 , H04N19/186 , H04N19/189
Abstract: A method of video processing includes determining, for a conversion between a video component of a video comprising a current video block and a bitstream representation of the video, that a first coding tool is used based on a rule for the current video block; and performing the conversion according to the determining, wherein the first coding tool includes transforming a representation of a visual signal between two color spaces, and where the rule specifies that a first quantization parameter (QP) offset for a luma channel of the current video block is equal to K1 and a second QP offset for a first chroma channel of the current video block is K1+O, where K1 and O are integers.
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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
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/159 , H04N19/139 , H04N19/105 , H04N19/186 , H04N19/176
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20220272389A1
公开(公告)日：2022-08-25
申请号：US17732692
申请日：2022-04-29
Inventor： Li ZHANG , Weijia ZHU , Kai ZHANG , Hongbin LIU
IPC: H04N19/82 , H04N19/17 , H04N9/77 , H04N19/117 , H04N19/132 , H04N19/136
Abstract: A method of video processing includes making a determination for a conversion between a video region of a video and a bitstream representation of the video to use a cross-component adaptive loop filtering (CC-ALF) tool for refining chroma samples values using luma sample values; and performing the conversion based on the determination, wherein the refining includes correcting the chroma sample values using a final refinement that is a further refinement of a first refinement value determined by selectively filtering the luma sample values.
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公开(公告)号：US20220272348A1
公开(公告)日：2022-08-25
申请号：US17732743
申请日：2022-04-29
Inventor： Li ZHANG , Weijia ZHU , Kai ZHANG , Hongbin LIU
IPC: H04N19/132 , H04N19/117 , H04N19/80 , H04N19/186
Abstract: A method of video processing includes determining, for a conversion between a video region of a video and a bitstream representation of the video, to correct chroma samples of the video region using a cross-component adaptive loop filter (CC-ALF) process based on filtering of luma sample differences; and performing the conversion based on the determining.
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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：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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公开(公告)号：US20210400299A1
公开(公告)日：2021-12-23
申请号：US17463838
申请日：2021-09-01
Inventor： Weijia ZHU , Hongbin LIU , Kai ZHANG , Li ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/105 , H04N19/46 , H04N19/176
Abstract: Motion Vector Management for Decoder Side Motion Vector Refinement is disclosed. A method of video processing including: determining, for a conversion between a first block of video and a bitstream representation of the first block of video, whether and/or how to apply decoder-side motion vector refinement (DMVR) based on a signaled information; and performing the conversion based on the determination.
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