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公开(公告)号：US20210211714A1
公开(公告)日：2021-07-08
申请号：US17193397
申请日：2021-03-05
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/513 , H04N19/527
Abstract: A method, a video processing apparatus and computer-readable program medium for video process is disclosed. A method of video processing includes storing, during a conversion between a current block of video and a bitstream representation of the current block, affine model parameters for the current block; and performing the conversion using the affine model parameters, wherein the affine model parameters are derived at least from motion vectors of control points of the current block.
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公开(公告)号：US20210211710A1
公开(公告)日：2021-07-08
申请号：US17212339
申请日：2021-03-25
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/184 , H04N19/176 , H04N19/186 , H04N19/172
Abstract: A method for video processing is provided to comprise: 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：US20210211707A1
公开(公告)日：2021-07-08
申请号：US17204448
申请日：2021-03-17
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/513 , H04N19/176
Abstract: A method for video processing is provided. The method includes determining, based on a coding mode of a parent coding unit of a current coding unit that uses an affine coding mode or a rate-distortion (RD) cost of the affine coding mode, a usage of an adaptive motion vector resolution (AMVR) for a conversion between a coded representation of a current block of a video and the current block; and performing the conversion according to a result of the determining.
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公开(公告)号：US20210211679A1
公开(公告)日：2021-07-08
申请号：US17209410
申请日：2021-03-23
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/137 , H04N19/117 , H04N19/80 , H04N19/105 , H04N19/513 , H04N19/176
Abstract: A method, a video processing apparatus and computer-readable program medium for video process is disclosed. The method of video coding including: using, during a conversion between a current block of video and a bitstream representation of the current block, an affine motion mode for the current block; updating motion information of the current block after motion compensation so as to obtain updated motion information of the current block; and using the updated motion information during conversion of subsequent video blocks and their respective bitstream representations.
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公开(公告)号：US20210195205A1
公开(公告)日：2021-06-24
申请号：US17173601
申请日：2021-02-11
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/137 , H04N19/105 , H04N19/159 , H04N19/51 , H04N19/31 , H04N19/176
Abstract: Devices, systems and methods for digital video coding, which includes an overlapped block motion compensation (OBMC) process based on temporal neighbors, are described. An exemplary method for video processing includes generating, based on a weighted sum of at least two temporary prediction blocks, a prediction block for a current video block, a first of the at least two temporary prediction blocks being based on a first motion information associated with the current video block, a second of the at least two temporary prediction blocks being based on a second motion information associated with at least one neighboring block of the current video block, and the at least one neighboring block including a temporally neighboring block, and performing, based on the prediction block, a conversion between the current video block and a bitstream representation of the current video block.
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Patent Agency Ranking
公开(公告)号：US20210185362A1
公开(公告)日：2021-06-17
申请号：US17183855
申请日：2021-02-24
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/96 , H04N19/119 , H04N19/184
Abstract: A method of video processing includes determining, for a conversion between a coded representation of a video block of a video region and the video block, that an extended quadtree (EQT) partition is enabled for at least one video block of the video region, and performing the conversion based on the determining. The EQT partition splits the video block in multiple sub-blocks such that at least one of the multiple sub-blocks has a size that is different from a half width of the video block times a half height of the video block. The coded representation of the video block is represented using a codeword from a table that includes mapping between codewords and partition types.
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公开(公告)号：US20210185346A1
公开(公告)日：2021-06-17
申请号：US17161198
申请日：2021-01-28
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
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：US20210160525A1
公开(公告)日：2021-05-27
申请号：US17167303
申请日：2021-02-04
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/51 , H04N19/184 , H04N19/176 , H04N19/593
Abstract: The present disclosure relate to affine inheritance method in intra block copy mode. A method for video processing is provided, including: in a process of acquiring motion information of a current video block, during a conversion between the current video block and a bitstream representation of the current video block, wherein the motion information of the current video block is based on at least one affine model of at least one neighboring block of the current video block, determining whether a neighboring block of the current video block uses an Intra-Block Copy(IBC) mode in which at least one reference picture used by the neighboring video block is identical to a picture in which the neighboring block is located; disabling, for the current video block, to derive an affine candidate from the neighboring block based on determining that the neighbouring block uses the IBC mode; and performing the conversion based on the motion information of the current video block.
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公开(公告)号：US20210136411A1
公开(公告)日：2021-05-06
申请号：US17150146
申请日：2021-01-15
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/593 , H04N19/176 , H04N19/186 , H04N19/103 , H04N19/96
Abstract: The application provides a video processing method, comprising: receiving a bitstream representation of video data including a video block wherein the video block comprises samples in a first component and in a second component; deriving a first intra-prediction mode for the first component from second intra-prediction mode of sub-blocks for the second component in case that the video block of the second component is split into the sub-blocks; performing a conversion between the video block and the bitstream representation of the video block based on the first intra-prediction mode information.
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公开(公告)号：US20210112284A1
公开(公告)日：2021-04-15
申请号：US17128965
申请日：2020-12-21
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Hsiao Chiang CHUANG , Yue WANG
IPC: H04N19/96 , H04N19/119 , H04N19/513 , H04N19/132 , H04N19/13 , H04N19/176
Abstract: Devices, systems and methods for picture border coding are described. In a representative aspect, a method for processing picture includes segmenting a picture into one or multiple picture segments, determining that a first block of a picture segment covers at least one region that is outside a border of the picture segment, wherein a size of the first block is M×N pixels, selecting a second block of size K×L pixels, where (K≤M and L
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