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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
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/105 , H04N19/137 , H04N19/30 , H04N19/132 , H04N19/139 , H04N19/513
Abstract: 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：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：US20220264143A1
公开(公告)日：2022-08-18
申请号：US17652184
申请日：2022-02-23
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
Abstract: 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
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Jizheng XU , Yue WANG
IPC: H04N19/46 , H04N19/70 , H04N19/159 , H04N19/176
Abstract: 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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Patent Agency Ranking
公开(公告)号：US20220256195A1
公开(公告)日：2022-08-11
申请号：US17711294
申请日：2022-04-01
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/70 , H04N19/46 , H04N19/169 , H04N19/176
Abstract: An example method of video processing includes performing a conversion between a picture of a video that comprises one or more sub-pictures and a bitstream representation of the video. The bitstream representation conforms to a format rule that specifies that information about a sub-picture is included in the bitstream representation based on at least one of: (1) one or more corner positions of the sub-picture, or (2) a dimension of the sub-picture. The format rule further specifies that the information about the sub-picture is positioned after information about a coding tree block in the bitstream representation.
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公开(公告)号：US20220256166A1
公开(公告)日：2022-08-11
申请号：US17717515
申请日：2022-04-11
Inventor： Zhipin DENG , Li ZHANG , Hongbin LIU , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/137 , H04N19/132 , H04N19/117 , H04N19/80 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: A method of video processing is described. The method includes performing a conversion between a current video block of a video and a bitstream representation of the video, wherein, during the conversion, a prediction of the current video block is determined as a weighted sum of two or more predictions of the current video block, and a motion vector storing process for the current video block is determined according to a rule, wherein the current video block uses a partitioning prediction mode that is a first mode which is based on multiple first partitioning schemes or a second mode which is based on multiple second partitioning schemes, and wherein the rule specifies that a process used for determining which motion vector and how many motion vectors are stored is same for the first mode or the second mode.
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公开(公告)号：US20220256146A1
公开(公告)日：2022-08-11
申请号：US17723175
申请日：2022-04-18
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/117 , H04N19/82 , H04N19/132 , H04N19/186 , H04N19/176 , H04N19/46 , H04N19/70
Abstract: An example method of video processing includes determining, for a conversion between a block of a first sub-picture of a video and a bitstream representation of the video, whether to apply a deblocking process across an edge between the block and a neighboring block of a second sub-picture based on whether a loop filtering process is allowed across subpicture boundaries. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20220248063A1
公开(公告)日：2022-08-04
申请号：US17716447
申请日：2022-04-08
Applicant: Bytedance Inc.
Inventor： Weijia ZHU , Li ZHANG , Jizheng XU , Kai ZHANG
IPC: H04N19/82 , H04N19/186 , H04N19/117 , H04N19/70
Abstract: An example method of video processing includes making a determination, for a conversion between a current video block of a video and a bitstream representation of the video, whether a cross-component adaptive loop filtering tool is enabled for the current video block based on a color property of the video. The method also includes performing the conversion according to the determination.
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公开(公告)号：US20220217363A1
公开(公告)日：2022-07-07
申请号：US17700086
申请日：2022-03-21
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/176 , H04N19/107 , H04N19/583 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/167 , H04N19/105 , H04N19/117 , H04N19/119
Abstract: A method of decoding visual information from a coded representation of the visual information includes determining that a block being decoded representing a portion of an encoded picture of visual information is coded using a motion candidate associated with a motion vector, wherein the motion vector is derived as a weighted average of a plurality of motion vectors, wherein all of the plurality of motion vectors refer to a same picture type, and wherein a first picture type represents a current picture and a second picture type represents a reference pictures different from the current picture and decoding the block being decoded by using the motion candidate.
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