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公开(公告)号：US11871006B2
公开(公告)日：2024-01-09
申请号：US17505227
申请日：2021-10-19
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/159 , H04N19/172 , H04N19/176 , H04N19/96 , H04N19/117 , H04N19/132 , H04N19/186 , H04N19/105 , H04N19/513
CPC classification number: H04N19/159 , H04N19/105 , H04N19/117 , H04N19/132 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/513 , H04N19/96
Abstract: Devices, systems and methods for digital video coding, which includes inter prediction with refinement, are described. An exemplary method of video processing includes determining to use, for a conversion between a current block of a video and a bitstream representation of the video, a first linear optimization model for the conversion using a first coding mode, the first linear optimization model being derived from a second linear optimization model that is used for the conversion using a second coding mode, and performing, based on the determining, the conversion. Another exemplary method of video processing includes determining to use, for a conversion between a current block of a video and a bitstream representation of the video, a gradient value computation algorithm for a bi-directional optical flow tool, and performing, based on the determining, the conversion.
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公开(公告)号：US11870979B2
公开(公告)日：2024-01-09
申请号：US17886084
申请日：2022-08-11
Inventor： Zhipin Deng , Li Zhang , Kai Zhang , Ye-kui Wang , Kui Fan
IPC: H04N19/30 , H04N19/52 , H04N19/70 , H04N19/82 , H04N19/105 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/139 , H04N19/167 , H04N19/172 , H04N19/174 , H04N19/184 , H04N19/196 , H04N19/547 , H04N19/573
CPC classification number: H04N19/105 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/139 , H04N19/167 , H04N19/172 , H04N19/174 , H04N19/184 , H04N19/196 , H04N19/30 , H04N19/52 , H04N19/547 , H04N19/573 , H04N19/70 , H04N19/82
Abstract: Methods, apparatus, systems for video processing, including video encoding or video decoding are described. One example method includes performing a conversion between a video comprising a video picture that includes a video slice and a bitstream of the video. The bitstream conforms to a format rule specifying that, in case a slice type of the video slice is type P and temporal motion vector prediction is enabled, usage of reference picture resampling (RPR) for a reference picture in a collocated reference picture list is disabled. The reference picture is indicated by a reference index of a collocated picture of the video slice used for the temporal motion vector prediction.
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公开(公告)号：US11863771B2
公开(公告)日：2024-01-02
申请号：US17398887
申请日：2021-08-10
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/00 , H04N19/436 , H04N19/137 , H04N19/159 , H04N19/176 , H04N19/51
CPC classification number: H04N19/436 , H04N19/137 , H04N19/159 , H04N19/176 , H04N19/51
Abstract: A method for processing a video includes maintaining one or more tables, wherein each table includes motion candidates derived from previously processed video blocks that are processed prior to a first video block of a video; deriving motion information for the first video block; applying refinement to the motion information when at least one decoder side motion vector derivation (DMVD) technologies is enabled; performing a conversion between a bitstream representation of the first video block and the first video block using the refined motion information; and determining, whether to use the refined motion information or un-refined motion information for updating one or more tables.
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公开(公告)号：US11863762B2
公开(公告)日：2024-01-02
申请号：US17992246
申请日：2022-11-22
Inventor： Ye-kui Wang , Zhipin Deng , Kai Zhang , Li Zhang
IPC: H04N19/169 , H04N19/70 , H04N19/96 , H04N19/174 , H04N19/172 , H04N19/184 , H04N19/186 , H04N19/46 , H04N19/105
CPC classification number: H04N19/172 , H04N19/105 , H04N19/174 , H04N19/184 , H04N19/186 , H04N19/188 , H04N19/46 , H04N19/70 , H04N19/96
Abstract: Embodiments for video processing, including video coding, video decoding and video transcoding are described. One example method includes performing a conversion between a video having one or more layers having one or more video pictures having one or more subpictures and a bitstream of the video according to a rule, wherein the rule defines network abstraction layer (NAL) units to be extracted from a bitstream during a sub-bitstream extraction process to output a sub-bitstream, wherein the rule further specifies that one or more inputs to the sub-bitstream extraction process include a target output layer set (OLS) index (targetOlsIdx) that identifies an OLS index of a target OLS and is equal to an index to a list of OLSs specified by a video parameter set, and wherein the one or more inputs satisfy a set of conditions.
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公开(公告)号：US11856211B2
公开(公告)日：2023-12-26
申请号：US17319961
申请日：2021-05-13
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/423 , H04N19/159 , H04N19/176 , H04N19/137 , H04N19/30 , H04N19/513 , H04N19/167 , H04N19/196 , H04N19/52
CPC classification number: H04N19/423 , H04N19/105 , H04N19/137 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/196 , H04N19/30 , H04N19/513 , H04N19/52
Abstract: Usage for History-based affine parameters is described. In an exemplary aspect, a method for video processing includes deriving, for a conversion between a current block of video and a bitstream representation of the current block, affine related information associated with affine model for the current block based on affine parameters stored in a buffer for storing affine related information of blocks coded prior the current block; and performing the conversion by using the affine related information.
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Patent Agency Ranking
公开(公告)号：US11849126B2
公开(公告)日：2023-12-19
申请号：US17714480
申请日：2022-04-06
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/00 , H04N19/186 , H04N19/117 , H04N19/159 , H04N19/70
CPC classification number: H04N19/186 , H04N19/117 , H04N19/159 , H04N19/70
Abstract: A method for video processing is provided to include: performing a conversion between a current video block of a video and a coded representation of current video block, wherein the conversion uses a coding mode in which the current video block is constructed based on a first domain and a second domain and/or chroma residue is scaled in a luma-dependent manner, and wherein information used for the coding mode is signaled in a parameter set that is different from a sequence parameter set (SPS), a video parameter set (VPS), a picture parameter set (PPS), or an adaptation parameter set (APS) used for carrying adaptive loop filtering (ALF) parameters.
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公开(公告)号：US11843798B2
公开(公告)日：2023-12-12
申请号：US17523286
申请日：2021-11-10
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/513 , H04N19/51 , H04N19/517 , H04N19/172 , H04N19/176 , H04N19/184 , H04N19/186
CPC classification number: H04N19/513 , H04N19/172 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/51 , H04N19/517
Abstract: A method for video processing is provided to include: determining a motion vector precision of one or more motion vectors related to a current video block of a video; selecting, based on the motion vector precision, a motion vector range; and performing, based on the motion vector range, a conversion between the current video block and a bitstream representation of the video.
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公开(公告)号：US20230396809A1
公开(公告)日：2023-12-07
申请号：US18450647
申请日：2023-08-16
Inventor： Zhipin Deng , Li Zhang , Ye-Kui Wang , Kai Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/159 , H04N19/172 , H04N19/174 , H04N19/46
CPC classification number: H04N19/70 , H04N19/159 , H04N19/172 , H04N19/174 , H04N19/46
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 video including one or more video regions and a bitstream of the video according to a format rule. The format rule specifies that a variable X indicates whether B slice is allowed or used in a video region. The format rule further specifies that the variable X is based on values of a reference picture list information present flag and/or a field indicating a number of entries in a reference picture list syntax structure.
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公开(公告)号：US20230396796A1
公开(公告)日：2023-12-07
申请号：US18452394
申请日：2023-08-18
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Na Zhang , Yang Wang
IPC: H04N19/563 , H04N19/176
CPC classification number: H04N19/563 , H04N19/176
Abstract: A method implemented by a video coding apparatus. The method includes determining a padding dimension for a video unit of a video according to a characteristic of the video unit, where the padding dimension is a horizontal padding dimension (padW) or a vertical padding dimension (padH). The method further includes converting between the video unit of the video and a bitstream in accordance with the padding dimension determined.
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公开(公告)号：US20230396792A1
公开(公告)日：2023-12-07
申请号：US18452331
申请日：2023-08-18
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Na Zhang , Yang Wang
IPC: H04N19/513 , H04N19/132 , H04N19/176
CPC classification number: H04N19/513 , H04N19/132 , H04N19/176
Abstract: A method for coding video data implemented by a video coding apparatus. The method includes clipping a motion vector of a padding sample to be within a motion vector range, wherein the motion vector range is based on a maximum padding dimension of an extended area around a video unit of a video; and converting between the video unit of the video and a bitstream in accordance with the motion vector as constrained.
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