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公开(公告)号：US20210306631A1
公开(公告)日：2021-09-30
申请号：US17346486
申请日：2021-06-14
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/119 , H04N19/159 , H04N19/176 , H04N19/96 , H04N19/103 , H04N19/186 , H04N19/593
Abstract: Method and apparatus for using block size restrictions in video decoding are described. In a representative aspect, a method for video decoding includes receiving a bitstream representation of video data including a block wherein the block comprises samples associated with a first component and second components, wherein samples associated with the first component of the block have a dimension M×N; and decoding the first component and the second components of the block; wherein decoding the first component of the block comprises, based on the dimension, decoding a plurality of sub-blocks for the first component of the block, and the plurality of the sub-blocks are generated by performing a splitting operation only on the samples associated with the first component of the block and not on the samples associated with the second components of the block.
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公开(公告)号：US20210297694A1
公开(公告)日：2021-09-23
申请号：US17338601
申请日：2021-06-03
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: 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：US20210297672A1
公开(公告)日：2021-09-23
申请号：US17343086
申请日：2021-06-09
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/132 , H04N19/105 , H04N19/12 , H04N19/60 , H04N19/159 , 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 performing a conversion between a current video block of a video and a bitstream representation of the current video block according to a rule, where the rule specifies a relationship between applicability of a matrix based intra prediction (MIP) mode or a transform mode during the conversion, where the MIP mode includes determining a prediction block of the current video block 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, and where the transform mode specifies use of a transform operation for the determining the prediction block for the current video block.
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公开(公告)号：US20210297671A1
公开(公告)日：2021-09-23
申请号：US17342996
申请日：2021-06-09
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/132 , H04N19/176 , H04N19/159 , H04N19/105
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 performing a conversion between a current video block of a video and a bitstream representation of the current video block 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, where the performing the conversion includes deriving, according to a rule, boundary samples by applying a left bit shift operation or a right bit shift operation on a sum of at least one reference boundary sample, and where the rule determines whether to apply the left bit shift or the right bit shift operation.
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95.发明申请公开(公告)号：US20210281877A1
公开(公告)日：2021-09-09
申请号：US17330889
申请日：2021-05-26
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/56 , H04N19/52 , H04N19/184 , H04N19/176 , H04N19/593
Abstract: A method for video processing is provided to include constructing, during a conversion between a current video block and a coded representation of the current video block, an intra block copy (IBC) motion candidate list, wherein insertion of motion candidates to the IBC motion candidate list is subject to a size restriction; and performing the conversion using the IBC motion candidate list.
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Patent Agency Ranking
公开(公告)号：US20210258575A1
公开(公告)日：2021-08-19
申请号：US17244533
申请日：2021-04-29
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG , Na ZHANG
IPC: H04N19/119 , H04N19/105 , H04N19/46 , H04N19/176
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：US20210250602A1
公开(公告)日：2021-08-12
申请号：US17199925
申请日：2021-03-12
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/513 , H04N19/176 , H04N19/109
Abstract: Techniques for video processing are described. One example method includes determining an indication that indicates a maximum number of candidates allowed in a candidate list for at least one video block in a video, the maximum number of candidates allowed in the candidate list corresponding to at least one of a maximum number of candidates in a geometry partition mode (GEO) based merge candidate list, a maximum number of base candidates in a merge with motion vector difference (MMVD) merge candidate list, a maximum number of base candidates in a sub-block based MMVD merge candidate list, and a maximum number of candidates in a geometry partition mode based affine merge candidate list; and performing video processing on the at least one video block based on the indication.
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公开(公告)号：US20210243468A1
公开(公告)日：2021-08-05
申请号：US17237450
申请日：2021-04-22
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/52 , H04N19/176 , H04N19/184
Abstract: Devices, systems and methods for utilization of motion information for affine mode are described. In a representative aspect, a video processing method includes: acquiring, during a conversion between a current block and a bitstream representation of the current block, motion information of the current block, wherein the motion information of the current block is based on at least one affine model parameter of a neighboring block of the current block; and performing, based on the motion information, the conversion between the current block and the bitstream representation of the current block.
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公开(公告)号：US20210227250A1
公开(公告)日：2021-07-22
申请号：US17225504
申请日：2021-04-08
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/577 , H04N19/176 , H04N19/105 , H04N19/186 , H04N19/593 , H04N19/119
Abstract: Gradient computation in Bi-directional optical flow are described. In a representative aspect, a method of video processing including: modifying temporal gradients in a motion vectors refinement process of a video block or sub-blocks within the video block; and performing the motion vectors refinement process of the video block or the sub-blocks within the video block based on the modified temporal gradients.
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公开(公告)号：US20210211647A1
公开(公告)日：2021-07-08
申请号：US17207060
申请日：2021-03-19
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Yue WANG
IPC: H04N19/105 , H04N19/137 , H04N19/30 , H04N19/176
Abstract: A method of video processing includes determining, for a current block, at least one motion candidate list; and performing a conversion between the current block and a bitstream representation of the current block using the at least one motion candidate list, the at least one motion candidate list including at least one motion candidate derived from a set of neighboring blocks including one or more spatial and temporal neighboring blocks.
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