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公开(公告)号：US20210297661A1
公开(公告)日：2021-09-23
申请号：US17343041
申请日：2021-06-09
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/105 , H04N19/132 , H04N19/117 , H04N19/82 , H04N19/159 , H04N19/70 , H04N19/176
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 determining, for encoding a current video block of a video into a bitstream representation of the current video block, a type of neighboring samples of the current video block to be used according to a rule, and adding, based on the determining, an encoded representation of the current video block to the bitstream representation, where the current video block is encoded using a matrix based intra prediction (MIP) mode in which a prediction block of the current video block is determined by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation.
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公开(公告)号：US20210297659A1
公开(公告)日：2021-09-23
申请号：US17338054
申请日：2021-06-03
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/105 , H04N19/176 , H04N19/184 , H04N19/46
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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公开(公告)号：US20210281859A1
公开(公告)日：2021-09-09
申请号：US17316390
申请日：2021-05-10
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/176 , H04N19/184 , H04N19/146 , H04N19/567
Abstract: A method of encoding or decoding video includes: dividing a current video block into multiple sub-blocks video blocks; generating a merge candidate list for at least one sub-blocks video blocks of the multiple sub-blocks video blocks; and performing a conversion between the video block and a bitstream of the video block based one the merge candidate list; wherein the merge candidate list comprises at least one merge candidate with multi-hypothesis mode.
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公开(公告)号：US20210281856A1
公开(公告)日：2021-09-09
申请号：US17330836
申请日：2021-05-26
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/159 , H04N19/132 , H04N19/96 , H04N19/176
Abstract: A method for video processing is provided to include determining, for a conversion between a current video block of a video and a coded representation of the video, whether an intra block copy (IBC) mode in which a prediction block for the current video block is calculated based on a block vector in a picture that includes current video block is enabled based on a rule on a block dimension; and performing the conversion based on the determining.
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公开(公告)号：US20210281847A1
公开(公告)日：2021-09-09
申请号：US17330665
申请日：2021-05-26
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/137 , H04N19/176 , H04N19/159
Abstract: Techniques for video encoding and decoding are described. A method of video processing is disclosed. The method includes, determining, based on a video characteristic of a first video block, an enabling or disabling of a pruning process for a table updating process; updating one or multiple tables, based on the determination and motion information of the first video block, the one or multiple motion tables being History-based Motion Vector Prediction HMVP (HMVP) tables; and performing a conversion between a subsequent video block of the video and bitstream representation of the subsequent video block based on the updated tables.
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Patent Agency Ranking
公开(公告)号：US20210274208A1
公开(公告)日：2021-09-02
申请号：US17320950
申请日：2021-05-14
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/517 , H04N19/132 , H04N19/184 , H04N19/176
Abstract: The disclosure relates to harmonization between affine mode and other inter coding tools mode. A method for video processing, comprising: acquiring, during a conversion between a current block and a bitstream representation of the current block, an indication of the current block, wherein the indication indicates whether a merged affine model of the current block should be modified; and performing, at least based on the indication, the conversion between the current block and the bitstream representation of the current block.
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公开(公告)号：US20210274188A1
公开(公告)日：2021-09-02
申请号：US17321802
申请日：2021-05-17
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/139 , H04N19/176 , 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：US20210266537A1
公开(公告)日：2021-08-26
申请号：US17226400
申请日：2021-04-09
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/119 , H04N19/137 , H04N19/105 , H04N19/159 , H04N19/583 , H04N19/46 , H04N19/176
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：US20210243471A1
公开(公告)日：2021-08-05
申请号：US17238639
申请日：2021-04-23
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/583 , H04N19/513 , H04N19/105 , H04N19/159 , H04N19/176
Abstract: The present disclosure relates to improvement on overlapped block motion compensation. A method for video processing comprises: determining, during a conversion between a current block and a bitstream representation of the current block, a motion vector for a first sub-block inside the current block; using overlapped block motion compensation (OBMC) mode to perform the conversion; wherein the OBMC mode uses intermediate prediction values of the first sub-block based on the motion vector of the first sub-block and prediction values of at least a second video unit that is neighboring the first sub-block to generate final prediction values for the first sub-block; wherein a sub-block size of the first sub-block is based on block size, block shape, motion information, or reference picture of the current block.
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公开(公告)号：US20210211716A1
公开(公告)日：2021-07-08
申请号：US17154639
申请日：2021-01-21
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/577 , H04N19/105 , H04N19/176 , H04N19/96 , H04N19/159
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 block of a video and a bitstream representation of the video, whether a bi-prediction coding technique is applicable to the block based on a size of the block having a width W and a height H, W and H being positive integers. The method also includes performing the conversion based on the determining.
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