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公开(公告)号：US20240121410A1
公开(公告)日：2024-04-11
申请号：US18528070
申请日：2023-12-04
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/176 , H04N19/105 , H04N19/107 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/167 , H04N19/583
CPC classification number: H04N19/176 , H04N19/105 , H04N19/107 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/167 , H04N19/583
Abstract: Devices, systems and methods for applying intra-block copy (IBC) in video coding are described. In general, methods for integrating IBC with existing motion compensation algorithms for video encoding and decoding are described. In a representative aspect, a method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using a motion compensation algorithm, and encoding, based on the determining, the current block by selectively applying an intra-block copy to the current block. In a representative aspect, another method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using an intra-block copy, and encoding, based on the determining, the current block by selectively applying a motion compensation algorithm to the current block.
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32.发明授权公开(公告)号：US11956431B2
公开(公告)日：2024-04-09
申请号：US17358700
申请日：2021-06-25
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/119 , H04N19/105 , H04N19/139 , H04N19/157 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/52 , H04N19/70
CPC classification number: H04N19/119 , H04N19/105 , H04N19/139 , H04N19/157 , H04N19/176 , H04N19/52 , H04N19/70 , H04N19/172 , H04N19/174
Abstract: A method for processing a video includes performing a determination, by a processor, that a first video block is partitioned to include a first prediction portion that is non-rectangular and non-square; adding a first motion vector (MV) prediction candidate associated with the first prediction portion to a motion candidate list associated with the first video block, wherein the first MV prediction candidate is derived from a sub-block MV prediction candidate; and performing further processing of the first video block using the motion candidate list.
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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：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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Patent Agency Ranking
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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公开(公告)号：US11917197B2
公开(公告)日：2024-02-27
申请号：US17680979
申请日：2022-02-25
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/593 , H04N19/11 , H04N19/124 , H04N19/157 , H04N19/176
CPC classification number: H04N19/593 , H04N19/11 , H04N19/124 , H04N19/157 , H04N19/176
Abstract: Extensions of intra coding modes in video coding are described. One example is a method for video processing, comprising: generating, for a conversion between a current video block of a video and a bitstream representation of a video, a set of extended intra prediction modes (IPMs) associated with the current video block by revising a set of existing IPMs to include at least one new coding method, wherein the new coding method is different from coding methods in the existing IPMs and is to be treated as IPM; and performing the conversion based on the set of extended IPMs.
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公开(公告)号：US20240064315A1
公开(公告)日：2024-02-22
申请号：US18471485
申请日：2023-09-21
Inventor： Weijia Zhu , Jizheng Xu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/46 , H04N19/172 , H04N19/186
CPC classification number: H04N19/46 , H04N19/172 , H04N19/186
Abstract: Methods, systems, and devices for implementing an adaptive color transform (ACT) during image/video encoding and decoding, including: determining, for a conversion between a video including a block and a bitstream of the video, that a size of the block is greater than a maximum allowed size for an ACT mode, and performing, based on the determining, the conversion. In response to the size of the block being greater than the maximum allowed size for the ACT mode, the block is partitioned into multiple sub-blocks. Each of the multiple sub-blocks share a same prediction mode, and the ACT mode is enabled at a sub-block level.
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