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公开(公告)号：US11949861B2
公开(公告)日：2024-04-02
申请号：US18090681
申请日：2022-12-29
Inventor： Yang Wang , Hongbin Liu , Li Zhang
IPC: H04N19/00 , H04N19/117 , H04N19/167 , H04N19/186
CPC classification number: H04N19/117 , H04N19/167 , H04N19/186
Abstract: Techniques for implementing adaptive loop filtering are described. One example method of video processing includes making a first determination, for a conversion between a video unit of a video and a bitstream of the video, a first luma adaptive loop filter, ALF, boundary across which a luma adaptive loop filter is selectively applied to a luma component of the video unit and a second luma ALF boundary; making a second determination, from the second luma ALF boundary, a chroma ALF boundary across which a chroma adaptive loop filter is selectively applied for a chroma component of the video unit; and performing the conversion based on the first determination and the second determination.
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公开(公告)号：US20240107036A1
公开(公告)日：2024-03-28
申请号：US18508721
申请日：2023-11-14
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu , Ye-kui Wang
IPC: H04N19/186 , H04N19/132 , H04N19/159 , H04N19/167 , H04N19/169 , H04N19/176 , H04N19/70
CPC classification number: H04N19/186 , H04N19/132 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/1883 , H04N19/70
Abstract: A method of video processing is provided that includes performing a conversion between a block of a video and a bitstream of the video. The bitstream conforms to a formatting rule specifying that a size of a merge estimation region (MER) is indicated in the bitstream and the size of the MER is based on a dimension of a video unit. The MER comprises a region used for deriving a motion candidate for the conversion.
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公开(公告)号：US20240107007A1
公开(公告)日：2024-03-28
申请号：US18525099
申请日：2023-11-30
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/139 , H04N19/159 , H04N19/17 , H04N19/176 , H04N19/189 , H04N19/46 , H04N19/52
CPC classification number: H04N19/105 , H04N19/139 , H04N19/159 , H04N19/17 , H04N19/176 , H04N19/189 , H04N19/46 , H04N19/52
Abstract: Devices, systems and methods for digital video coding, which include sub-block based inter prediction methods, are described. An exemplary method for video processing includes determining, for a conversion between a current block of video and a bitstream representation of the video, a maximum number of candidates in a sub-block based merge candidate list and/or whether to add sub-block based temporal motion vector prediction (SbTMVP) candidates to the sub-block based merge candidate list based on whether temporal motion vector prediction (TMVP) is enabled for use during the conversion or whether a current picture referencing (CPR) coding mode is used for the conversion, and performing, based on the determining, the conversion.
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公开(公告)号：US20240098260A1
公开(公告)日：2024-03-21
申请号：US18503773
申请日：2023-11-07
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/117 , H04N19/132 , H04N19/14 , H04N19/176 , H04N19/82 , H04N19/96
CPC classification number: H04N19/117 , H04N19/132 , H04N19/14 , H04N19/176 , H04N19/82 , H04N19/96
Abstract: A method of video processing includes determining a classification of samples of a block in a video picture of a video according to a rule, wherein the video picture is divided into multiple regions, and wherein the rule disallows use of neighboring samples of a current sample across one or more boundaries of the multiple regions for the classification. The one or more boundaries of the multiple regions comprises a virtual boundary for an adaptive loop filtering (ALF) process. The method also includes performing a conversion between the block and a bitstream representation of the video by selectively applying the ALF process according to the classification.
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公开(公告)号：US11936874B2
公开(公告)日：2024-03-19
申请号：US18073191
申请日：2022-12-01
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/132 , G06F7/78 , G06F17/16 , H04N19/105 , H04N19/159 , H04N19/176
CPC classification number: H04N19/132 , G06F7/78 , G06F17/16 , H04N19/105 , H04N19/159 , H04N19/176
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 performing a conversion between a current video block of a video and a bitstream representation of the current video block using a matrix based intra prediction (MIP) mode in which a prediction block of the current video block is determined by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and followed by an upsampling operation, where the upsampling operation is performed, in both a vertical direction and a horizontal direction in a fixed order, on samples obtained from the matrix vector multiplication operation.
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Patent Agency Ranking
公开(公告)号：US11936855B2
公开(公告)日：2024-03-19
申请号：US18165017
申请日：2023-02-06
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/517 , H04N19/52 , H04N19/523 , H04N19/80
CPC classification number: H04N19/105 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/517 , H04N19/52 , H04N19/523 , H04N19/80
Abstract: A method of video processing is provided to include: deciding a coding mode used for representing a current video block of a video in a coded representation of the video; and coding the current video block into the coded representation according to the coding mode, wherein use of alternative half-pel accuracy filters in addition to a default half-pel accuracy filter for representing motion information is disabled for the current video block due to use of the coding mode.
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公开(公告)号：US11930175B2
公开(公告)日：2024-03-12
申请号：US17582739
申请日：2022-01-24
Inventor： Zhipin Deng , Li Zhang , Kai Zhang , Hongbin Liu
IPC: H04N19/119 , G06T9/40 , H04N19/107 , H04N19/109 , H04N19/11 , H04N19/127 , H04N19/132 , H04N19/167 , H04N19/169 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/189 , H04N19/60 , H04N19/61 , H04N19/70 , H04N19/96
CPC classification number: H04N19/119 , G06T9/40 , H04N19/107 , H04N19/109 , H04N19/11 , H04N19/127 , H04N19/132 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/1883 , H04N19/189 , H04N19/60 , H04N19/61 , H04N19/70 , H04N19/96
Abstract: Methods, systems, and devices for coding or decoding video wherein the picture partition mode is based on block size are described. An example method for video processing includes using a dimension of a virtual pipeline data unit (VPDU) used for a conversion between a video comprising one or more video regions comprising one or more video blocks and a bitstream representation of the video to perform a determination of whether a ternary-tree (TT) or a binary tree (BT) partitioning of a video block of the one or more video blocks is enabled, and performing, based on the determination, the conversion, wherein the dimension is equal to VSize in luma samples, wherein dimensions of the video block are CtbSizeY in luma samples, wherein VSize=min(M, CtbSizeY), and wherein M is a positive integer.
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公开(公告)号：US11930165B2
公开(公告)日：2024-03-12
申请号：US17356321
申请日：2021-06-23
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/176 , H04N19/109 , H04N19/132 , H04N19/159 , H04N19/186 , H04N19/46 , H04N19/513 , H04N19/52
CPC classification number: H04N19/109 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/513 , H04N19/52
Abstract: Techniques for implementing video processing techniques are described. In one example implementation, a method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, a manner in which coding information of the current block is represented in the bitstream representation in part based on whether a condition associated with a size of the current block is satisfied. The method also includes performing the conversion based on the determining.
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公开(公告)号：US11924463B2
公开(公告)日：2024-03-05
申请号：US17523232
申请日：2021-11-10
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/563 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/513
CPC classification number: H04N19/563 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/513
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：US20240073417A1
公开(公告)日：2024-02-29
申请号：US18500495
申请日：2023-11-02
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/119 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/52
CPC classification number: H04N19/119 , H04N19/105 , H04N19/139 , H04N19/176 , H04N19/52
Abstract: Devices, systems and methods for digital video coding, which includes using default motion candidates for video coding, are described. An exemplary method for video processing includes determining, for a conversion between a block of a video and a bitstream representation of the video, weights to use for a weighted average of prediction samples along an edge of two partitions of the block. The two partitions are generated according to a geometry partition mode, and the weights are selected from a first weighting factor group that at least one of the weights is equal to 0 or 1. The method also includes performing the conversion based on the determining.
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