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公开(公告)号：US20220232227A1
公开(公告)日：2022-07-21
申请号：US17714541
申请日：2022-04-06
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yue WANG
IPC: H04N19/159 , H04N19/132 , H04N19/176 , H04N19/96 , H04N19/184 , H04N19/52 , H04N19/56 , H04N19/593
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：US20220232224A1
公开(公告)日：2022-07-21
申请号：US17699032
申请日：2022-03-18
Inventor： Jizheng XU , Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Yue WANG
IPC: H04N19/157 , H04N19/176 , H04N19/18 , H04N19/30 , H04N19/60 , H04N19/124 , H04N19/132
Abstract: Methods, systems, and devices for high-precision transform and quantization for image and video coding are described. A example method of video processing includes determining, for a conversion between a video comprising a current block and a bitstream representation of the video, that the conversion comprises an application of a transform to the current block, and performing, based on the determining, the conversion, wherein a bit-shifting operation of a scaling process for transform coefficients associated with the transform is based on whether the current block is coded with a block-based differential pulse code modulation (BDPCM) mode.
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公开(公告)号：US20220232207A1
公开(公告)日：2022-07-21
申请号：US17699021
申请日：2022-03-18
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Jizheng XU , Yue WANG
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: An example method of video processing includes determining, for a conversion between a current picture of a video and a coded representation of the video, a position of a reference sample in a reference picture that is associated with the current picture based on a top-left position of a window of a picture. The picture includes at least the current picture or the reference picture, and the window is subject to a processing rule during the conversion. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20220224897A1
公开(公告)日：2022-07-14
申请号：US17705509
申请日：2022-03-28
Inventor： Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/119 , H04N19/176 , H04N19/70 , H04N19/159 , H04N19/137 , H04N19/105
Abstract: A method of visual media processing, including: determining, fora conversion between a current video block of a visual media data and a bitstream representation of the visual media data, that a partitioning mode coding tool is disabled for the conversion based on a rule that depends on a dimension of the current video block; and performing the conversion based on the determining.
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公开(公告)号：US20220224887A1
公开(公告)日：2022-07-14
申请号：US17702318
申请日：2022-03-23
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU
IPC: H04N19/105 , H04N19/139 , H04N19/176 , H04N19/96
Abstract: A method of video processing is described. The method includes determining, for a conversion between a current video block of a video picture of a video and a coded representation of the video, whether or how to reset reference sample values of a reference region of the video picture used for predicting the current video block according to a rule; and performing the conversion based on the determining.
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Patent Agency Ranking
公开(公告)号：US20220217382A1
公开(公告)日：2022-07-07
申请号：US17698141
申请日：2022-03-18
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU , Yue WANG
IPC: H04N19/46 , H04N19/70 , H04N19/169 , H04N19/176
Abstract: A method of visual media processing, including: determining, for a current video block, a motion vector for use in a sub-block based motion vector prediction (sbTMVP) process to locate a correspondingblock in a collocated picture for a conversionbetweenthe currentvideo block and a bitstream representation of the current video block, wherein the motion vector used in the sbTMVP process is computed in accordance with a scaling operation; and performing based on using the motion vector, the conversion between the current video block and the bitstream representation of the visual media data.
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公开(公告)号：US20220210414A1
公开(公告)日：2022-06-30
申请号：US17675756
申请日：2022-02-18
Inventor： Li ZHANG , Kai ZHANG , Jizheng XU , Hongbin LIU , Yue WANG
IPC: H04N19/12 , H04N19/176 , H04N19/48 , H04N19/18 , H04N19/60
Abstract: A video processing method includes determining, for a conversion between a current block of a video and a bitstream representation of the video, whether to enable a level mapping operation or a level remapping operation based on a rule, wherein the level mapping operation or the level remapping operation includes changing between a first representation of a residual coefficient of the current block and a second representation of the residual coefficient of the current block based on neighboring residual coefficients of the residual coefficient; and performing the conversion by selectively using the level mapping operation or the level remapping operation based on the determining.
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公开(公告)号：US20220191475A1
公开(公告)日：2022-06-16
申请号：US17686103
申请日：2022-03-03
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU
IPC: H04N19/105 , H04N19/132 , H04N19/169 , H04N19/176
Abstract: A method of video processing is described. The method includes performing a conversion between a current video block of a video picture of a video and a coded representation of the video according to a buffer allocation rule, wherein the conversion uses an intra block copy (IBC) mode in which a prediction of the current video block is derived based on sample values from a same video slice with the current video block, and wherein the sample values are determined by block vectors, wherein the buffer allocation rule specifies that a virtual buffer allocated for the conversion using the IBC mode is greater than a minimum size of memory for storing a portion of the video picture searched for determining the block vectors.
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公开(公告)号：US20220182665A1
公开(公告)日：2022-06-09
申请号：US17651956
申请日：2022-02-22
Inventor： Junru LI , Meng WANG , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG , Shiqi WANG
IPC: H04N19/593 , H04N19/167 , H04N19/176 , H04N19/132 , H04N19/186 , H04N19/172 , H04N19/105 , H04N19/159
Abstract: A video processing method includes performing a conversion between a video including a video unit and a coded representation of the video, where, upon processing the video unit in the conversion, one or more frequence tables are selectively updated to include information about frequence of one or more intra prediction modes of the video unit used in the processing, where the frequence indicates an occurrence of the one or more intra prediction modes used for the conversion, and where, upon processing the video unit, one or more sorted intra prediction mode (IPM) tables are selectively updated to indicate the one or more intra prediction modes used in the processing.
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公开(公告)号：US20220182638A1
公开(公告)日：2022-06-09
申请号：US17652204
申请日：2022-02-23
Inventor： Jizheng XU , Li ZHANG , Kai ZHANG , Hongbin LIU , Yue WANG
IPC: H04N19/132 , H04N19/105 , H04N19/169 , H04N19/176 , H04N19/70
Abstract: A method of video processing is described. The method of video processing includes: performing a conversion between a video comprising video blocks and a coded representation of the video; wherein the coded representation conforms to a format rule, wherein the format rule specifies that context adaptive coding of a block vector predictor (BVP) index of a first video block coded using a block vector (BV) prediction mode and an index for inter mode coding used for coding a second video block is performed by sharing a same context; wherein the BVP index is to an entry in a history-based motion vector predictor list used for generating a block vector predictor for the first video block.
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