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公开(公告)号：US11470304B2
公开(公告)日：2022-10-11
申请号：US17126825
申请日：2020-12-18
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/30 , H04N19/517 , H04N19/137
Abstract: A video encoding method includes generating, for a conversion between a video block in a video picture and a bitstream representation of the video block, a list of merge candidates for the video block, wherein the list of merge candidates includes at least a first merge candidate that is a virtual merge candidate derived by scaling a motion vector of a second merge candidate to a different reference picture and modifying a reference picture of a second merge candidate; and performing, using the list of merge candidates, the conversion between the video block and the video bitstream.
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公开(公告)号：US11451819B2
公开(公告)日：2022-09-20
申请号：US17098962
申请日：2020-11-16
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/52 , H04N19/105 , H04N19/132 , H04N19/137 , H04N19/176 , H04N19/96 , H04N19/184 , H04N19/56 , H04N19/70
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：US11445199B2
公开(公告)日：2022-09-13
申请号：US16940959
申请日：2020-07-28
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/139 , H04N19/52 , H04N19/513 , H04N19/523 , H04N19/107 , H04N19/176
Abstract: A method of processing a video bitstream includes determining a motion precision set based on coding information of a current block. A conversion between a video block and a coded representation of the video block is performed based on the motion precision set. The conversion corresponds to a reconstruction of the current block. In some example aspects, a motion vector difference (MVD) precision of a current block from a motion precision set is determined based on a selected motion precision set and a MVD precision index. A conversion between a video block and a coded representation of the video block using an MVD is performed based on the MVD precision. The MVD represents a difference between a predicted motion vector and an actual motion vector used during motion compensation processing.
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公开(公告)号：US11438598B2
公开(公告)日：2022-09-06
申请号：US17201711
申请日：2021-03-15
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/149 , H04N19/105 , H04N19/11 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/30 , H04N19/593 , H04N19/159 , H04N19/50 , H04N19/184 , H04N19/70
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 that are completely determinable by two chroma samples and corresponding two luma samples; and performing the conversion based on the determining.
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公开(公告)号：US11438585B2
公开(公告)日：2022-09-06
申请号：US17678827
申请日：2022-02-23
Inventor： Zhipin Deng , Li Zhang , Kai Zhang , Hongbin Liu
IPC: H04N19/117 , H04N19/82 , H04N19/70 , H04N19/186 , H04N19/176 , H04N19/159
Abstract: A method of video processing is described. The method includes determining, for subblocks of a current video block of a video, subblock boundaries to which a deblocking filter is to be applied according to a rule; and performing a conversion between the video and a coded representation of the video using the deblocking filter, wherein the rule specifies that a deblocking filter length is determined without checking a relationship between i) a sum of a position of a subblock of the current video block and a predefined value and ii) a width or a height of the current video block.
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Patent Agency Ranking
公开(公告)号：US11431973B2
公开(公告)日：2022-08-30
申请号：US17087154
申请日：2020-11-02
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang , Na Zhang
IPC: H04N19/105 , H04N19/119 , 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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公开(公告)号：US11431965B2
公开(公告)日：2022-08-30
申请号：US17193605
申请日：2021-03-05
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/105 , H04N19/137 , H04N19/30 , H04N19/132 , H04N19/139 , H04N19/513 , H04N19/176 , H04N19/186
Abstract: Video coding and decoding in which the bitstream is generated using affine motion compensation mode are described. One example includes generating, for a reconstruction of a current video unit, a list of affine motion vector prediction candidates in which each candidate in the list is calculated without using a clipping operation, wherein the clipping operation limits a magnitude of the candidate motion vectors to a range; and performing the reconstruction of the current video unit using the list of affine motion vector prediction candidates.
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公开(公告)号：US11431964B2
公开(公告)日：2022-08-30
申请号：US17161198
申请日：2021-01-28
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/52 , H04N19/17 , H04N19/105 , H04N19/159 , H04N19/176 , H04N19/189 , H04N19/139 , H04N19/46
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：US11418780B2
公开(公告)日：2022-08-16
申请号：US17494956
申请日：2021-10-06
Inventor： Li Zhang , Na Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/117 , H04N19/186 , H04N19/70
Abstract: Devices, systems and methods related to management of syntax flags with respect chroma formats in video processing are described. In one representative aspect, a video decoding method includes determining, for a conversion between a video and a coded representation of the video, whether a syntax element associated with an adaptive loop filtering (ALF) operation for a chroma component of the video is included in the coded representation based on a condition. The method also includes performing the conversion according to the determining.
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公开(公告)号：US11412227B2
公开(公告)日：2022-08-09
申请号：US16940959
申请日：2020-07-28
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/139 , H04N19/52 , H04N19/513 , H04N19/523 , H04N19/107 , H04N19/176
Abstract: A method of processing a video bitstream includes determining a motion precision set based on coding information of a current block. A conversion between a video block and a coded representation of the video block is performed based on the motion precision set. The conversion corresponds to a reconstruction of the current block. In some example aspects, a motion vector difference (MVD) precision of a current block from a motion precision set is determined based on a selected motion precision set and a MVD precision index. A conversion between a video block and a coded representation of the video block using an MVD is performed based on the MVD precision. The MVD represents a difference between a predicted motion vector and an actual motion vector used during motion compensation processing.
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