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公开(公告)号：US20230111133A1
公开(公告)日：2023-04-13
申请号：US17896532
申请日：2022-08-26
Inventor： Jizheng Xu , Li Zhang , Ye-kui Wang , Kai Zhang , Zhipin Deng
IPC: H04N19/70 , H04N19/132 , H04N19/18 , H04N19/174
Abstract: Several techniques for video encoding and video decoding are described. One example method includes performing a conversion between a video including a video unit and a bitstream of the video according to a rule, wherein the rule specifies whether a transform skip residual coding operation is enabled for the video unit, and wherein one or more syntax elements are included in the bitstream at a video segment level indicative of whether the transform skip residual coding operation is enabled for the video unit.
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公开(公告)号：US11616965B2
公开(公告)日：2023-03-28
申请号：US17479192
申请日：2021-09-20
Inventor： Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang , Jizheng Xu
IPC: H04N19/30 , H04N19/105 , H04N19/176 , H04N19/186 , H04N19/132 , H04N19/70 , H04N19/146 , H04N19/196 , H04N19/96
Abstract: A method for visual media processing, including performing a conversion between a current chroma chroma block of visual media data and a bitstream representation of the current chroma chroma block, wherein, during the conversion, a chroma residual of the current chroma chroma block is scaled based on a scaling coefficient, wherein the scaling coefficient is derived at least based on luma samples located in predefined positions.
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公开(公告)号：US20230091877A1
公开(公告)日：2023-03-23
申请号：US17978263
申请日：2022-11-01
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/159 , H04N19/176
Abstract: A method of video processing includes maintaining, for a conversion between a current video block of a current picture of a visual media data and a bitstream representation of the visual media data, a buffer comprising reference samples from the current picture for a derivation of prediction samples of the current video block. One or more reference samples in the buffer that are marked unavailable for the derivation have values outside of a pixel value range.
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公开(公告)号：US20230059183A1
公开(公告)日：2023-02-23
申请号：US17962141
申请日：2022-10-07
Inventor： Zhipin Deng , Li Zhang , Ye-Kui Wang , Kai Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/46 , H04N19/159 , H04N19/174 , H04N19/172
Abstract: Systems, methods and apparatus for video processing are described. The video processing may include video encoding, video decoding, or video transcoding. One example method of video processing includes performing a conversion between a video including one or more video regions and a bitstream of the video according to a format rule. The format rule specifies that a variable X indicates whether B slice is allowed or used in a video region. The format rule further specifies that the variable X is based on values of a reference picture list information present flag and/or a field indicating a number of entries in a reference picture list syntax structure.
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公开(公告)号：US20230048864A1
公开(公告)日：2023-02-16
申请号：US17949045
申请日：2022-09-20
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/52 , H04N19/105 , H04N19/117 , H04N19/132 , H04N19/70 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/30 , H04N19/159
Abstract: A method for video processing includes performing a conversion between a current video block of a video region of a video and a coded representation of the video. The conversion uses a coding mode in which the current video block is constructed based on a first domain and a second domain and/or chroma residue is scaled in a luma-dependent manner. A parameter set in the coded representation comprises parameter information for the coding mode.
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Patent Agency Ranking
公开(公告)号：US11582471B2
公开(公告)日：2023-02-14
申请号：US17479192
申请日：2021-09-20
Inventor： Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang , Jizheng Xu
IPC: H04N19/30 , H04N19/105 , H04N19/176 , H04N19/186 , H04N19/132 , H04N19/70 , H04N19/146 , H04N19/196 , H04N19/96
Abstract: A method for visual media processing, including performing a conversion between a current chroma chroma block of visual media data and a bitstream representation of the current chroma chroma block, wherein, during the conversion, a chroma residual of the current chroma chroma block is scaled based on a scaling coefficient, wherein the scaling coefficient is derived at least based on luma samples located in predefined positions.
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公开(公告)号：US20230039865A1
公开(公告)日：2023-02-09
申请号：US17887297
申请日：2022-08-12
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/132 , H04N19/105 , H04N19/159 , H04N19/176 , G06F17/16
Abstract: 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, where the conversion includes performing the upsampling operation in which the final prediction block is determined by using a reduced prediction block of the current video block and by using reconstructed neighboring samples of the current video block according to a rule, and where the reduced prediction block is obtained by performing the matrix vector multiplication operation on reduced boundary samples of the current video block.
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公开(公告)号：US11575889B2
公开(公告)日：2023-02-07
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：US11575888B2
公开(公告)日：2023-02-07
申请号：US17569390
申请日：2022-01-05
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/169 , H04N19/423
Abstract: A method of visual media processing method includes performing a conversion between a current video block of a current picture of a visual media data and a bitstream representation of the visual media data. The conversion is based on a reference region from the current picture comprising reference samples used for deriving a prediction block of the current video block. A virtual buffer of a defined size is used for tracking availability of the reference samples for deriving the prediction block.
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公开(公告)号：US20230032798A1
公开(公告)日：2023-02-02
申请号：US17954905
申请日：2022-09-28
Inventor： Li Zhang , Weijia Zhu , Kai Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/117 , H04N19/132 , H04N19/82 , H04N19/176 , H04N19/159
Abstract: In an exemplary aspect, a method for visual media processing includes identifying a boundary at a vertical edge and/or a horizontal edge of two video blocks; calculating a boundary strength of a filter based on at least one of the two video blocks crossing a vertical edge or a horizontal edge is coded using a combined intra-inter prediction (CIIP) mode; deciding whether to turn on or off the filter; selecting a strength of the filter in case the filter is turned on; and performing, based on the selecting, a deblocking filter (DB) process to the video blocks.
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