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公开(公告)号：US20230336724A1
公开(公告)日：2023-10-19
申请号：US18339046
申请日：2023-06-21
Inventor： Li Zhang , Kai Zhang , Jizheng Xu , Hongbin Liu , Yue Wang
IPC: H04N19/12 , H04N19/176 , H04N19/18 , H04N19/48 , H04N19/60
CPC classification number: H04N19/12 , H04N19/176 , H04N19/18 , H04N19/48 , H04N19/60
Abstract: A video processing method includes determining, for a conversion between a current block of a video and a bitstream representation of the video, whether to enable a level mapping operation or a level remapping operation based on a rule, wherein the level mapping operation or the level remapping operation includes changing between a first representation of a residual coefficient of the current block and a second representation of the residual coefficient of the current block based on neighboring residual coefficients of the residual coefficient; and performing the conversion by selectively using the level mapping operation or the level remapping operation based on the determining.
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公开(公告)号：US20230328263A1
公开(公告)日：2023-10-12
申请号：US18174168
申请日：2023-02-24
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/186 , H04N19/11 , H04N19/124 , H04N19/136 , H04N19/157 , H04N19/176 , H04N19/593 , H04N19/61 , H04N19/70
CPC classification number: H04N19/186 , H04N19/11 , H04N19/124 , H04N19/136 , H04N19/157 , H04N19/176 , H04N19/593 , H04N19/61 , H04N19/70 , H04N19/82
Abstract: Devices, systems and methods for digital video coding, which includes matrix-based intra prediction methods for video coding, are described. In a representative aspect, a method for video processing includes generating, for a conversion between a current video block of a video including multiple video blocks and a bitstream representation of the video, a most probable mode (MPM) list for a matrix based intra prediction (MIP) tool based on a rule, where, the MIP tool includes determining, during the conversion, a prediction block of the current video block by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation, and where the rule specifies a mapping between a number of MIP modes and dimensions of the multiple video blocks; and performing the conversion based on the generating.
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公开(公告)号：US11778226B2
公开(公告)日：2023-10-03
申请号：US17237402
申请日：2021-04-22
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/176 , H04N19/184
CPC classification number: H04N19/52 , H04N19/176 , H04N19/184
Abstract: The present disclosure relates to storage of motion information for affine mode. A video processing method is provided, including: selecting, during a current affine calculation step in a conversion between a current block and a bitstream representation of the current block, one or more parameters of a set of affine model parameters; storing the one or more parameters for the current block; and performing, based on the one or more parameters, the conversion between the current block and the bitstream representation of the current block.
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公开(公告)号：US11765398B2
公开(公告)日：2023-09-19
申请号：US17128965
申请日：2020-12-21
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Hsiao Chiang Chuang , Yue Wang
IPC: H04N19/96 , H04N19/119 , H04N19/13 , H04N19/132 , H04N19/176 , H04N19/513 , H04N19/186
CPC classification number: H04N19/96 , H04N19/119 , H04N19/13 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/513
Abstract: Devices, systems and methods for picture border coding are described. In a representative aspect, a method for processing picture includes segmenting a picture into one or multiple picture segments, determining that a first block of a picture segment covers at least one region that is outside a border of the picture segment, wherein a size of the first block is M×N pixels, selecting a second block of size K×L pixels, where (K≤M and L
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公开(公告)号：US11765358B2
公开(公告)日：2023-09-19
申请号：US17977630
申请日：2022-10-31
Inventor： Yang Wang , Li Zhang , Zhipin Deng , Kai Zhang , Hongbin Liu
IPC: H04N19/119 , H04N19/70 , H04N19/176
CPC classification number: H04N19/119 , H04N19/176 , H04N19/70
Abstract: Systems, methods and apparatus for video processing are described. The video processing may include video encoding, video decoding or video transcoding. One example method of video processing includes performing a conversion between a current block of a video and a bitstream of the video according to a rule. The rule specifies that selection of a context for coding a syntax element specifying whether the block is split horizontally or vertically is based on a number of allowed vertical splits and a number of allowed horizontal splits. The number of allowed vertical splits includes a number of allowed binary vertical splits and a number of allowed ternary vertical splits, and the number of allowed horizontal splits includes a number of allowed binary horizontal splits and a number of allowed ternary horizontal splits.
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Patent Agency Ranking
公开(公告)号：US20230291930A1
公开(公告)日：2023-09-14
申请号：US18301846
申请日：2023-04-17
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/593 , H04N19/11 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/186
CPC classification number: H04N19/593 , H04N19/11 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/186
Abstract: A method of video processing is described. The method includes: determining, based on a coding mode of a current video block of a video, whether a position dependent intra prediction combination (PDPC) method is used for coding the current video block based on a first rule, and performing a conversion between the current video block and a coded representation of the video according to the determining, wherein the PDPC method combines neighboring samples with a prediction signal of the current video block to generate a refined prediction signal of the current video block.
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公开(公告)号：US11758143B2
公开(公告)日：2023-09-12
申请号：US17717515
申请日：2022-04-11
Inventor： Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/186 , H04N19/70 , H04N19/137 , H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/80
CPC classification number: H04N19/137 , H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/70 , H04N19/80
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：US11743454B2
公开(公告)日：2023-08-29
申请号：US17699021
申请日：2022-03-18
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Zhipin Deng , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/70
CPC classification number: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/70
Abstract: An example method of video processing includes determining, for a conversion between a current picture of a video and a coded representation of the video, a position of a reference sample in a reference picture that is associated with the current picture based on a top-left position of a window of a picture. The picture includes at least the current picture or the reference picture, and the window is subject to a processing rule during the conversion. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20230269379A1
公开(公告)日：2023-08-24
申请号：US18310344
申请日：2023-05-01
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/149 , H04N19/105 , H04N19/11 , H04N19/132 , H04N19/159 , H04N19/70 , H04N19/184 , H04N19/186 , H04N19/30 , H04N19/50 , H04N19/593 , H04N19/176
CPC classification number: H04N19/149 , H04N19/105 , H04N19/11 , H04N19/132 , H04N19/159 , H04N19/70 , H04N19/184 , H04N19/186 , H04N19/30 , H04N19/50 , H04N19/593 , H04N19/176
Abstract: A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, multiple sets of parameters, wherein each set of parameters defines a cross-component linear model (CCLM) and is derived from a corresponding group of chroma samples at corresponding chroma sample positions; determining, based on the multiple sets of parameters, parameters for a final CCLM; and performing the conversion based on the final CCLM.
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公开(公告)号：US11736697B2
公开(公告)日：2023-08-22
申请号：US17732692
申请日：2022-04-29
Inventor： Li Zhang , Weijia Zhu , Kai Zhang , Hongbin Liu
IPC: H04N19/82 , H04N19/17 , H04N19/117 , H04N19/132 , H04N19/136 , H04N9/77 , H04N19/186 , H04N19/70 , H04N19/80
CPC classification number: H04N19/132 , H04N9/77 , H04N19/117 , H04N19/136 , H04N19/17 , H04N19/186 , H04N19/70 , H04N19/80 , H04N19/82
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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