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公开(公告)号：US11570464B2
公开(公告)日：2023-01-31
申请号：US17330945
申请日：2021-05-26
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/30 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/52 , H04N19/105 , H04N19/117 , H04N19/184 , H04N19/70
Abstract: A method for video processing is provided to include: making a determination that a coding mode is enabled for a conversion between a current video block of a video and a coded representation of the video; and performing the conversion using a palette prediction mode wherein at least a palette of representative sample values is used for the current video block, and wherein, in the coding mode, the current video block is constructed based on samples in a first domain and a second domain and/or chroma residue is scaled in a luma-dependent manner.
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公开(公告)号：US11570462B2
公开(公告)日：2023-01-31
申请号：US17392658
申请日：2021-08-03
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/513 , H04N19/132 , H04N19/137 , H04N19/176
Abstract: A video processing method is disclosed to include: generating one or more initial predictions for a sub-block of a current video block of the video; refining the one or more initial predictions to generate a final prediction block using a prediction refinement with optical flow (PROF) procedure by calculating motion vector differences based on variables having a bit width not exceeding a predetermined maximum bit width; and performing a conversion between the current video block and a coded representation of the video using the variables having the bit width not exceeding the predetermined maximum bit width.
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公开(公告)号：US11570458B2
公开(公告)日：2023-01-31
申请号：US17353661
申请日：2021-06-21
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/186 , H04N19/593 , H04N19/50 , H04N19/117 , H04N19/176 , H04N19/184 , H04N19/157
Abstract: A method for video bitstream processing includes generating a prediction block for a first video block of a video related to a first component, where the prediction block is selectively generated according to a criterion by applying a two-step cross-component prediction mode (TSCPM), and performing a conversion between the first video block and a bitstream representation of the video using the prediction block, wherein a first field in the bitstream representation corresponds to the TSCPM.
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公开(公告)号：US20230027478A1
公开(公告)日：2023-01-26
申请号：US17898073
申请日：2022-08-29
Inventor： Zhipin Deng , Ye-kui Wang , Li Zhang , Kai Zhang , Kui Fan
IPC: H04N19/70 , H04N19/122 , H04N19/186 , H04N19/132 , H04N19/139 , H04N19/105 , H04N19/11 , H04N19/61
Abstract: Methods, systems, apparatuses for video processing are described. A method for processing video includes performing a conversion between a video and a bitstream of the video according to a format rule, and wherein the format rule specifies to include, in a general constraint syntax structure associated with the video, one or more general constraint flags indicating whether corresponding syntax elements are included in a sequence parameter set (SPS) and/or a picture parameter set (PPS) and/or a picture header (PH) and/or a slice header (SH) or to constrain values of the syntax elements in the SPS and/or the PPS and/or the PH and/or the SH.
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公开(公告)号：US11563982B2
公开(公告)日：2023-01-24
申请号：US17400512
申请日：2021-08-12
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/61 , H04N19/70 , H04N19/176 , H04N19/186 , H04N19/11 , H04N19/12 , H04N19/124 , H04N19/46
Abstract: A video processing method is provided to comprise: performing a conversion between a current video block of a video and a coded representation of the current video block, wherein the coded representation conforms to a format rule specifying that a syntax element corresponding to side information of a secondary transform tool for the current video block is signaled in the coded representation before transform related information, wherein the secondary transform tool includes applying, during encoding, a forward secondary transform to an output of a forward primary transform applied to a residual of a video block prior to quantization, or applying, during decoding, an inverse secondary transform to an output of dequantization of the video block before applying an inverse primary transform.
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Patent Agency Ranking
公开(公告)号：US11553201B2
公开(公告)日：2023-01-10
申请号：US17405179
申请日：2021-08-18
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/513 , H04N19/176 , H04N19/132
Abstract: A method for processing a video includes performing a conversion between a current block of visual media data and a corresponding coded representation of the visual media data, wherein the conversion of the current block includes determining whether a use of one or both of a bi-directional optical flow (BIO) technique or a decoder-side motion vector refinement (DMVR) technique to the current block is enabled or disabled, and wherein the determining the use of the BIO technique or the DMVR technique is based on a cost criterion associated with the current block.
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公开(公告)号：US20230007307A1
公开(公告)日：2023-01-05
申请号：US17892866
申请日：2022-08-22
Inventor： Kai Zhang , Li Zhang , Ye-kui Wang , Zhipin Deng , Kui Fan , Jizheng Xu , Hongbin Liu
IPC: H04N19/70 , H04N19/174 , H04N19/96
Abstract: A method includes performing a conversion between a video including a video picture including one or more tiles and a bitstream of the video. The video picture refers to a picture parameter set, and the picture parameter set conforms to a format rule specifying that the picture parameter set includes a list of column widths for N tile columns, where N is an integer. An (N−1)-th tile column exists in the video picture and the (N−1)-th tile column has a width that is equal to an (N−1)-th entry in a list of explicitly included tile column widths plus one number of coding tree blocks.
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公开(公告)号：US20230007256A1
公开(公告)日：2023-01-05
申请号：US17864011
申请日：2022-07-13
IPC: H04N19/124 , H04N19/70 , H04N19/176 , H04N19/186
Abstract: A method of video processing includes determining, for a current video block of a video coded using an adaptive color transform mode, whether a joint coding of chroma residuals (JCCR) coding tool is enabled for the current video block, and performing, based on the determining, a conversion between the video and a bitstream of the video, wherein the bitstream conforms to a rule, and wherein the rule specifies that one or more quantization parameter (QP) offsets used for coding the current video block are signaled when the JCCR coding tool is enabled.
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公开(公告)号：US11546636B2
公开(公告)日：2023-01-03
申请号：US17406260
申请日：2021-08-19
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N11/02 , H04N19/61 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/11 , H04N19/124 , H04N19/132 , H04N19/70
Abstract: A video processing method includes determining, for a conversion between a block of a video and a bitstream representation of the video, that an output value from an inverse secondary transform with a reduced dimension (e.g., an inverse low frequency non-separable transform) is constrained within a range of [min, max] inclusively. The inverse secondary transform is applicable to the block between a de-quantization step and an inverse primary transform. The reduced dimension is reduced from a dimension of the block, and min and max are integer values. The method also includes performing the conversion based on the determining.
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公开(公告)号：US11533507B2
公开(公告)日：2022-12-20
申请号：US17582447
申请日：2022-01-24
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu
IPC: H04N19/176 , H04N19/105 , H04N19/423 , H04N19/593 , H04N19/11 , H04N19/132 , H04N19/172 , H04N19/186
Abstract: A method for video processing includes determining, for a conversion between a current video block of a video picture of a video and a bitstream of the video, a number of reference samples in a virtual buffer comprising reference samples derived from the video picture based on a rule, wherein the rule specifies that a maximum number of available reference samples in the virtual buffer is less than a size of the virtual buffer; and performing the conversion based on the determining, wherein the current video block is coded in a prediction mode in which prediction samples are derived from blocks of the available reference samples in the virtual buffer based on a block vector.
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