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公开(公告)号：US11134267B2
公开(公告)日：2021-09-28
申请号：US17011068
申请日：2020-09-03
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/159 , H04N19/176 , H04N19/56 , H04N19/137
Abstract: A method of video processing is provided to include maintaining one or more tables, wherein each table includes one or more motion candidates and each motion candidate is associated with corresponding motion information; performing a conversion between a current block and a bitstream representation of a video including the current block by using motion information in a table; and updating, after performing of the conversion, one or more tables based on M sets of additional motion information associated with the current block, M being an integer.
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公开(公告)号：US11134245B2
公开(公告)日：2021-09-28
申请号：US17074842
申请日：2020-10-20
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/577 , H04N19/105 , H04N19/176 , H04N19/52 , H04N19/109 , H04N19/159
Abstract: A video coding or decoding method includes using history-based motion vector prediction (HMVP) for conversion between multiple video blocks including a current block of video and a bitstream representation of the multiple video blocks such that for a uni-predicted block that for which a single reference picture is used for motion compensation, refraining from updating a look-up table for HMVP candidates for the uni-predicted block. The video coding or decoding method further includes performing the conversion using look-up tables for the multiple video blocks.
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公开(公告)号：US11128882B2
公开(公告)日：2021-09-21
申请号：US17167232
申请日：2021-02-04
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/513 , H04N19/176 , H04N19/184 , H04N19/52
Abstract: Devices, systems and methods for digital video coding, which includes constructing separate motion candidate lists for video coding, are described. An exemplary method for video processing includes constructing, for a first video block of a video, a first motion candidate list using a first motion candidate list construction method that includes motion candidates that only relate to history-based motion vector prediction (HMVP) candidates, and performing a conversion between the first video block and a bitstream representation of the video including the first video block according to the constructed first motion candidate list.
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公开(公告)号：US11122261B2
公开(公告)日：2021-09-14
申请号：US17071084
申请日：2020-10-15
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/70 , H04N19/184 , H04N19/186 , H04N19/513 , H04N19/96 , H04N19/137 , H04N19/52 , G06F1/03 , H04N19/139 , H04N19/11 , H04N19/117
Abstract: Devices, systems and methods for encoding and decoding digital video using historical information containing coding candidates are described. In a representative aspect, a method for video processing includes maintaining one or more tables of motion candidates during a conversion between a current video block and a bitstream representation of a video including the current video block, determining that the current video block is coded using a merge mode or an Advanced Motion Vector Prediction (AMVP) mode, and performing, based on the determining, the conversion between the current video block of and the bitstream representation of the video using one or more tables of motion candidates.
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公开(公告)号：US11115676B2
公开(公告)日：2021-09-07
申请号：US17167266
申请日：2021-02-04
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/51 , H04N19/593
Abstract: The present disclosure relate to interaction between intra block copy mode and inter prediction tools A method for video processing is provided, including: determining that an Intra-Block-Copy (IBC) mode is applied to a current video block of a video, wherein in the IBC mode, at least one reference picture used by the current video block is a current picture where the current video block is located in; making a decision regarding a disabling of a specific coding mode for the current block; performing, based on the decision, a conversion between the current video block and the bitstream representation; wherein the specific coding mode uses a motion vector and a non-current picture to derive a prediction of a video block.
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Patent Agency Ranking
公开(公告)号：US11109059B2
公开(公告)日：2021-08-31
申请号：US17098962
申请日：2020-11-16
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/52 , H04N19/176 , H04N19/184 , H04N19/70 , H04N19/105 , H04N19/132 , H04N19/137 , H04N19/56 , H04N19/96
Abstract: Devices, systems and methods for digital video coding, which includes motion prediction based on updated motion vectors generated using two-step inter-prediction, are described. Methods for clipping of updated MV or derived MV are described. An exemplary method for video coding includes: determining original motion information for a current block; updating original motion vectors of the original motion information for the current block based on a refining method; clipping the updated motion vectors to be within a range; and performing a conversion between the current block and a bitstream representation of a video including the current block, based on the clipped updated motion vectors.
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公开(公告)号：US11070821B2
公开(公告)日：2021-07-20
申请号：US17031208
申请日：2020-09-24
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
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：US11064206B2
公开(公告)日：2021-07-13
申请号：US16998406
申请日：2020-08-20
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/159 , H04N19/172 , H04N19/176 , H04N19/96 , H04N19/117 , H04N19/132 , H04N19/186
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：US11057642B2
公开(公告)日：2021-07-06
申请号：US16987670
申请日：2020-08-07
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/00 , H04N19/593 , H04N19/176 , H04N19/186
Abstract: A method for video processing is provided. The method includes performing downsampling on chroma and luma samples of a neighboring block of the current video block; 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 cross-component linear model (CCLM) based on the downsampled chroma and luma samples obtained from the downsampling; applying the CCLM on luma samples located in a luma block corresponding to the current video block to derive prediction values of the current video block; and performing the conversion based on the prediction values.
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公开(公告)号：US11057620B2
公开(公告)日：2021-07-06
申请号：US17018200
申请日：2020-09-11
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/46 , H04N19/176 , H04N19/184
Abstract: A method of video decoding includes checking one or more video blocks in pre-defined relative positions compared to a first video block to derive a first set of candidates, wherein each of the first set of candidates is derived from corresponding motion information of the video blocks checked, checking, upon a determination that a number of the first set of candidates has not reached a predetermined limit, one or multiple tables to derive a second set of candidates, and processing the first video block based on a bitstream representation of the first video block and the constructed candidate list.
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