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公开(公告)号：US11758183B2
公开(公告)日：2023-09-12
申请号：US17453135
申请日：2021-11-01
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/59 , H04N19/176 , H04N19/159 , H04N19/186 , H04N19/40 , H04N19/105 , H04N19/132 , H04N19/70
CPC classification number: H04N19/59 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/40 , H04N19/70
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 first determination whether a luma video block of a video is coded using a matrix based intra prediction (MIP) mode; performing a second determination that the luma video block is applicable for determining a chroma intra mode for a current chroma video block of the video; performing, based on the first determination and the second determination, a third determination about the chroma intra mode to be used for the current chroma video block; and performing, based on the third determination, a conversion between the current chroma video block and a bitstream representation of the current chroma video block.
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公开(公告)号：US11758177B2
公开(公告)日：2023-09-12
申请号：US16796708
申请日：2020-02-20
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/159 , H04N19/176 , H04N19/184
CPC classification number: H04N19/52 , H04N19/159 , H04N19/176 , H04N19/184
Abstract: Devices, systems and methods for coding video using one or more tables to store motion information and process subsequent blocks are described. In one aspect, a video coding method is provided to include deriving motion information for a first video block which is coded using an intra block copy mode, wherein one or more candidates of one or more tables are selectively checked during a motion candidate list construction process which is used to derive the motion information for the first video block, wherein each table of the one or more tables includes motion candidates derived from previously coded video blocks that are coded prior to the first video block; and coding, based on the motion information, the first video block.
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公开(公告)号：US11758126B2
公开(公告)日：2023-09-12
申请号：US17665275
申请日：2022-02-04
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/70 , H04N19/103 , H04N19/119 , H04N19/157 , H04N19/167 , H04N19/172 , H04N19/30 , H04N19/169
CPC classification number: H04N19/105 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/157 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/1883 , H04N19/30 , H04N19/70
Abstract: A method of video processing includes performing a conversion between a video unit of a video and a coded representation of the video using at least a video picture. Only one of a sub-picture coding mode or a resolution-changing coding mode is enabled for the video unit. The sub-picture coding mode is a mode in which the video picture is divided into multiple sub-pictures, and the resolution-changing coding mode is a mode in which a resolution of the video picture is adjusted during the conversion.
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公开(公告)号：US20230283786A1
公开(公告)日：2023-09-07
申请号：US18187318
申请日：2023-03-21
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/176 , H04N19/184 , H04N19/169 , H04N19/52 , H04N19/70 , H04N19/105 , H04N19/119 , H04N19/46 , H04N19/51 , H04N19/159 , H04N19/139 , H04N19/196 , H04N19/513 , H04N19/137 , H04N19/583
CPC classification number: H04N19/176 , H04N19/184 , H04N19/1883 , H04N19/52 , H04N19/70 , H04N19/105 , H04N19/119 , H04N19/46 , H04N19/51 , H04N19/159 , H04N19/139 , H04N19/196 , H04N19/521 , H04N19/137 , H04N19/583 , G06T7/223
Abstract: A method of processing video data includes determining, for a conversion between a current block of a video and a bitstream of the video, whether use of a geometric partitioning mode is enabled for the current block based on a rule that uses a characteristic of the current block; and performing the conversion according to the determining; wherein the rule specifies that the geometric partitioning mode for the current block is disabled in case that the current block has a specific size in width and/or height.
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公开(公告)号：US20230283777A1
公开(公告)日：2023-09-07
申请号：US18194420
申请日：2023-03-31
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang , Na Zhang
IPC: H04N19/119 , H04N19/105 , H04N19/132 , H04N19/137 , H04N19/176 , H04N19/139 , H04N19/159 , H04N19/52 , H04N19/46
CPC classification number: H04N19/119 , H04N19/105 , H04N19/132 , H04N19/137 , H04N19/176 , H04N19/139 , H04N19/159 , H04N19/52 , H04N19/46
Abstract: Devices, systems and methods for digital video coding, which include geometric partitioning, are described. An exemplary method for video processing includes making a decision, based on a priority rule, regarding an order of insertion of motion candidates into a motion candidate list for a conversion between a current block of video and a bitstream representation of the video, wherein the current block is coded using a geometry partition mode; and performing, based on the decision and the motion candidate list, the conversion.
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Patent Agency Ranking
公开(公告)号：US11750845B2
公开(公告)日：2023-09-05
申请号：US17962141
申请日：2022-10-07
Inventor： Zhipin Deng , Li Zhang , Ye-Kui Wang , Kai Zhang , Jizheng Xu
IPC: H04N19/46 , H04N19/70 , H04N19/159 , H04N19/172 , H04N19/174
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：US11736698B2
公开(公告)日：2023-08-22
申请号：US17506578
申请日：2021-10-20
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/137 , H04N19/132 , H04N19/159 , H04N19/176
CPC classification number: H04N19/137 , H04N19/132 , H04N19/159 , H04N19/176
Abstract: Devices, systems and methods for video processing are described. In one aspect, a video processing method is provided to include determining, for a conversion between a current video block of a video and a coded representation of the video, that a motion information of the current video block is refined using an optical flow-based method in which at least one motion vector offset is derived for a region within the current video block; clipping the at least one motion vector offset to a range [−N,M], wherein N and M are integers based on a rule; and performing the conversion based on at least one clipped motion vector offset.
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公开(公告)号：US20230262263A1
公开(公告)日：2023-08-17
申请号：US18193131
申请日：2023-03-30
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/61 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/11 , H04N19/124 , H04N19/132 , H04N19/70
CPC classification number: H04N19/61 , H04N19/11 , H04N19/70 , H04N19/124 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186
Abstract: A video processing method includes determining, for a conversion between a block of a video and a bitstream representation of the video, that a secondary transform with a reduced dimension dimension (e.g., an inverse low frequency non-separable transform) is applicable to a single sub-block of the block in case a dimension of the block satisfies a condition. The secondary transform is performed between a forward primary transform and a quantization step or between a de-quantization step and an inverse primary transform. The reduced dimension is reduced from a dimension of the block. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20230262226A1
公开(公告)日：2023-08-17
申请号：US18304631
申请日：2023-04-21
Inventor： Hongbin Liu , Kai Zhang , Li Zhang , Yue Wang , Junru Li , Tianliang Fu , Siwei Ma
IPC: H04N19/132 , H04N19/159 , H04N19/176
CPC classification number: H04N19/132 , H04N19/159 , H04N19/176
Abstract: Methods, systems and devices for sample string processing in intra coding are described. An example method of video processing includes determining, for a conversion between a video comprising a current block and a bitstream of the video, whether a first sample string of the current block forms a rectangle, and performing, based on the determining, the conversion, wherein the determining is based on a position and a length of the first sample string.
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公开(公告)号：US11729405B2
公开(公告)日：2023-08-15
申请号：US17162813
申请日：2021-01-29
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/189 , H04N19/105 , H04N19/102 , H04N19/186 , H04N19/132 , H04N19/176
CPC classification number: H04N19/189 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186
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, parameters of a cross-component linear model (CCLM) based on two or four chroma samples and/or corresponding luma samples; and performing the conversion based on the determining.
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