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公开(公告)号：US12063362B2
公开(公告)日：2024-08-13
申请号：US17748687
申请日：2022-05-19
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/117 , H04N19/174 , H04N19/176 , H04N19/186 , H04N19/31 , H04N19/70 , H04N19/82
CPC classification number: H04N19/117 , H04N19/174 , H04N19/176 , H04N19/186 , H04N19/31 , H04N19/70 , H04N19/82
Abstract: Devices, systems and methods for digital video coding, which includes in-loop reshaping for video coding, are described. An exemplary method for video processing includes performing a conversion between a video comprising one or more video data units and a bitstream representation of the video, the bitstream representation conforming to a format rule that specifies an inclusion of side information indicative of default parameters for a coding mode that is applicable to a video block of the one or more video data units for which the coding mode is enabled, and the side information providing parameters for constructing the video block based on a representation of the video block in an original domain and a reshaped domain and/or a luma-dependent scaling of a chroma residue of a chroma video block.
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公开(公告)号：US12063348B2
公开(公告)日：2024-08-13
申请号：US17691910
申请日：2022-03-10
Inventor： Yang Wang , Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/132 , H04N19/103 , H04N19/105 , H04N19/137 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/46 , H04N19/50
CPC classification number: H04N19/103 , H04N19/105 , H04N19/132 , H04N19/137 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/46 , H04N19/50
Abstract: A method of video processing is described. The method includes: deriving, for a conversion between a current block of a video and a coded representation of the video, a prediction block for the current block that is determined according to a tool in which weights are used to determine a weighted sum of two initial prediction blocks used to determine the prediction block; and performing the conversion using the prediction block; wherein the deriving includes: applying the weights to two intermediate prediction samples that respectively belong to the two initial prediction blocks to derive a final prediction sample; and performing a right shift operation for the final prediction sample, wherein the right shift operation is pbSample>> (shift1+3)), wherein pbSample represents the final prediction sample, shift1 is set equal to Max(2, 14−bitDepth); and determining the prediction block based on the final prediction sample.
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公开(公告)号：US12047558B2
公开(公告)日：2024-07-23
申请号：US17665275
申请日：2022-02-04
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/105 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/157 , H04N19/167 , H04N19/169 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/30 , H04N19/70
CPC classification number: H04N19/105 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/157 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/1883 , H04N19/30 , H04N19/70
Abstract: A method of video processing includes performing a conversion between a video unit of a video and a coded representation of the video using at least a video picture. Only one of a sub-picture coding mode or a resolution-changing coding mode is enabled for the video unit. The sub-picture coding mode is a mode in which the video picture is divided into multiple sub-pictures, and the resolution-changing coding mode is a mode in which a resolution of the video picture is adjusted during the conversion.
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公开(公告)号：US12034942B2
公开(公告)日：2024-07-09
申请号：US17873973
申请日：2022-07-26
Inventor： Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang , Jizheng Xu
IPC: H04N19/176 , H04N19/186 , H04N19/593
CPC classification number: H04N19/186 , H04N19/593
Abstract: A method for visual media processing, including: using a rule that specifies representing, based on a fixed value, a chroma residual scaling factor for at least one chroma block associated with a current video unit of visual media data, wherein the fixed value is based at least on one or more conditions; and performing a conversion between the current video unit and a bitstream representation of the current video unit.
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公开(公告)号：US12022114B2
公开(公告)日：2024-06-25
申请号：US18295553
申请日：2023-04-04
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/59 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/40 , H04N19/70
CPC classification number: H04N19/59 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/40 , H04N19/70
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 first determination whether a luma video block of a video is coded using a matrix based intra prediction (MIP) mode; performing a second determination that the luma video block is applicable for determining a chroma intra mode for a current chroma video block of the video; performing, based on the first determination and the second determination, a third determination about the chroma intra mode to be used for the current chroma video block; and performing, based on the third determination, a conversion between the current chroma video block and a bitstream representation of the current chroma video block.
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Patent Agency Ranking
公开(公告)号：US12022062B2
公开(公告)日：2024-06-25
申请号：US18081404
申请日：2022-12-14
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/105 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/157 , H04N19/167 , H04N19/169 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/30 , H04N19/70
CPC classification number: H04N19/105 , H04N19/103 , H04N19/119 , H04N19/132 , H04N19/157 , H04N19/167 , H04N19/172 , H04N19/176 , H04N19/186 , H04N19/1883 , H04N19/30 , H04N19/70
Abstract: A method of video processing includes performing a conversion between a video unit of a video and a coded representation of the video using at least a video picture. Only one of a subpicture coding mode or a resolution-changing coding mode is enabled for the video unit. The subpicture coding mode is a mode in which the video picture is divided into multiple subpictures, and the resolution-changing coding mode is a mode in which a resolution of the video picture is adjusted during the conversion.
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公开(公告)号：US20240137554A1
公开(公告)日：2024-04-25
申请号：US18531153
申请日：2023-12-06
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/517 , H04N19/105 , H04N19/132 , H04N19/137 , H04N19/139 , H04N19/159 , H04N19/176 , H04N19/196 , H04N19/513 , H04N19/573 , H04N19/577
CPC classification number: H04N19/517 , H04N19/105 , H04N19/132 , H04N19/137 , H04N19/139 , H04N19/159 , H04N19/176 , H04N19/196 , H04N19/521 , H04N19/573 , H04N19/577
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. 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. 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：US11962771B2
公开(公告)日：2024-04-16
申请号：US17723089
申请日：2022-04-18
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/82
CPC classification number: H04N19/119 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/70 , H04N19/82
Abstract: An example method of video processing includes performing a conversion between a picture of a video and a bitstream representation of the video. The picture includes one or more sub-pictures, and the bitstream representation conforms to a format rule that specifies that a length of a syntax element is equal to Ceil(Log 2(SS)) bits. SS is greater than 0, and the syntax element indicating a horizontal or a vertical position of a top-left corner of a coding tree unit of a sub-picture of the picture.
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公开(公告)号：US11949880B2
公开(公告)日：2024-04-02
申请号：US17684694
申请日：2022-03-02
Inventor： Jizheng Xu , Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang
IPC: H04N19/157 , H04N9/64 , H04N19/109 , H04N19/119 , H04N19/159 , H04N19/169 , H04N19/174 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/503
CPC classification number: H04N19/157 , H04N9/64 , H04N19/109 , H04N19/119 , H04N19/159 , H04N19/174 , H04N19/176 , H04N19/186 , H04N19/1883 , H04N19/46 , H04N19/503
Abstract: A method of video processing is described. The method includes determining, for a conversion between a current video block of a video and a coded representation of the video, whether a certain partitioning scheme is allowed for the current video block according to a rule that depends on a coding mode type used for representing the current video block in the coded representation and a dimension of the current video block; and performing the conversion based on the determining.
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公开(公告)号：US20240107013A1
公开(公告)日：2024-03-28
申请号：US18516447
申请日：2023-11-21
Inventor： Zhipin Deng , Li Zhang , Ye-kui Wang , Kai Zhang , Jizheng Xu
IPC: H04N19/117 , H04N19/105 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/174 , H04N19/176 , H04N19/186 , H04N19/463 , H04N19/52 , H04N19/70 , H04N19/80
CPC classification number: H04N19/117 , H04N19/105 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/174 , H04N19/176 , H04N19/186 , H04N19/463 , H04N19/52 , H04N19/70 , H04N19/80
Abstract: A method includes determining, for a conversion between a video block of a video and a bitstream of the video, a size of prediction block corresponding to the video block according to a rule. The method also includes performing the conversion based on the determining. The rule specifies that a first size of the prediction block is determined responsive to whether a prediction refinement using optical flow technique is used for coding the video block. The video block has a second size and is coded using an affine merge mode or an affine advanced motion vector prediction mode.
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