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公开(公告)号：US20210211677A1
公开(公告)日：2021-07-08
申请号：US17207118
申请日：2021-03-19
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/137 , H04N19/105 , H04N19/513 , H04N19/176
Abstract: A method of video processing includes deriving, for a current block, a set of control point motion vectors; determining a motion prediction model for the current block based on the set of CPMVs; and performing a conversion between the current block and a bitstream representation of the current block using the motion prediction model, the motion prediction model being a 8-parameter affine prediction model.
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公开(公告)号：US20210211654A1
公开(公告)日：2021-07-08
申请号：US17205865
申请日：2021-03-18
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/11 , H04N19/159 , H04N19/105 , H04N19/129 , H04N19/186 , H04N19/176
Abstract: Devices, systems and methods for digital video processing, which includes intra mode coding based on history information, are described. In a representative aspect, a method for video processing includes selecting, for a conversion between a current block of visual media data and a bitstream representation of the current block, a first intra prediction mode based on at least a first set of history intra coding information that includes statistical information of a set of intra prediction modes, and performing the conversion based on the first intra prediction mode.
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公开(公告)号：US20210185341A1
公开(公告)日：2021-06-17
申请号：US17183738
申请日：2021-02-24
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/513 , H04N19/176 , H04N19/157 , H04N19/56
Abstract: Methods, systems and devices for multi-motion model based video coding and decoding are described. An exemplary method for video processing includes determining, for a video block, a candidate for decoding using, for one or more target motion models from a number of motion models, one or more motion candidates from corresponding non-adjacent spatial or temporal blocks or motion information derived from previously coded blocks based on their associated motion models, and performing further processing of the video block using the candidate.
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公开(公告)号：US20210152816A1
公开(公告)日：2021-05-20
申请号：US17161106
申请日：2021-01-28
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/189 , H04N19/159 , H04N19/176
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：US20210144392A1
公开(公告)日：2021-05-13
申请号：US17154795
申请日：2021-01-21
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/186 , H04N19/159 , H04N19/176
Abstract: Techniques for implementing video processing techniques are described. In one example implementation, a method of video processing includes determining, for a conversion of a block of a video that is coded using an inter-intra prediction coding technique and a bitstream representation of the video, a prediction value at a position in the block based on a weighted sum of an inter prediction value and an intra prediction value at the position. The weighted sum is based on adding an offset to an initial sum obtained based on the inter prediction value and the intra prediction value. The offset is added prior to a right-shift operation performed to determine the weighted sum. The method also includes performing the conversion based on the determining.
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Patent Agency Ranking
公开(公告)号：US20210144388A1
公开(公告)日：2021-05-13
申请号：US17154736
申请日：2021-01-21
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/159 , H04N19/176 , H04N19/117 , H04N19/105
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, whether a combined inter and intra prediction (CIIP) coding technique is to be applied to the current block based on a characteristic of the current block. The CIIP coding technique uses an intermedia inter prediction value and an intermedia intra prediction value to derive a final prediction value of the current block. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20210120234A1
公开(公告)日：2021-04-22
申请号：US17135054
申请日：2020-12-28
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/105 , H04N19/137 , H04N19/513 , H04N19/176
Abstract: A method of video decoding includes maintaining a number of tables, wherein each table includes a set of motion candidates, wherein each motion candidate is associated with corresponding motion information derived from previously video blocks, performing a conversion between a video block and a coded representation of the video block, and determining, based on a conversion condition of the video block, whether to update at least one of the tables by adding motion information corresponding to the video block.
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公开(公告)号：US20210092379A1
公开(公告)日：2021-03-25
申请号：US17115462
申请日：2020-12-08
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/119 , H04N19/105 , H04N19/139 , H04N19/176
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 current block of a video and a bitstream representation of the video, one or more motion candidates for a geometry partition mode using one or more pairwise average candidates that are obtained by averaging a pair of candidates in a motion candidate list for the current block. The geometry partition mode includes partitioning the current block into multiple partitions. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20210076050A1
公开(公告)日：2021-03-11
申请号：US17099042
申请日：2020-11-16
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/176 , H04N19/184 , H04N19/103
Abstract: Devices, systems and methods for sub-block based prediction are described. In a representative aspect, a method for video processing comprises determining a block size constrain, making a determination, based on the block size constrain, about whether or not a merge affine mode and a non-merge affine mode are allowed for a video block in a video frame, and generating a bitstream representation of the video block based on the making the determination.
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公开(公告)号：US20210037240A1
公开(公告)日：2021-02-04
申请号：US17074892
申请日：2020-10-20
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/52 , H04N19/577
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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