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公开(公告)号：US11641478B2
公开(公告)日：2023-05-02
申请号：US17675843
申请日：2022-02-18
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/33 , H04N19/159 , H04N19/12 , H04N19/124 , H04N19/136 , H04N19/157 , H04N19/167 , H04N19/70 , H04N19/18 , H04N19/30 , H04N19/176 , H04N19/50 , H04N19/61
Abstract: A video processing method includes determining, fora conversion between a video block of a video and a coded representation of the video, factors of a scaling tool based on a coding mode of the video block; and performing the conversion using the scaling tool, wherein the use of the scaling tool comprises: scaling at least some coefficients representing the video block during encoding or descaling at least some coefficients from the coded representation during decoding.
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公开(公告)号：US11641474B2
公开(公告)日：2023-05-02
申请号：US17246794
申请日：2021-05-03
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/70 , H04N19/159 , H04N19/149 , H04N19/132 , H04N19/30 , H04N19/593 , H04N19/11 , H04N19/50
Abstract: A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video that is a chroma block and a coded representation of the video, multiple sets of parameters, wherein each set of parameters defines a cross-component linear model (CCLM) and is derived from a corresponding group of chroma samples at corresponding chroma sample positions; determining, based on the multiple sets of parameters, parameters for a final CCLM; and performing the conversion based on the final CCLM.
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公开(公告)号：US11638038B2
公开(公告)日：2023-04-25
申请号：US17718785
申请日：2022-04-12
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Zhipin Deng , Jizheng Xu , Yue Wang
IPC: H04N19/46 , H04N19/70 , H04N19/159 , H04N19/176 , H04N19/174 , H04N19/169
Abstract: An example method of video processing includes performing a conversion between a video picture of a video and a bitstream representation of the video. The bitstream representation conforms to a format rule. The format rule specifies that applicability of a Decoder-side Motion Vector Refinement coding tool and a Bi-Directional Optical Flow coding tool for the video picture are indicated separately in the bitstream representation.
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公开(公告)号：US20230117813A1
公开(公告)日：2023-04-20
申请号：US18083956
申请日：2022-12-19
Inventor： Zhipin Deng , Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/30 , H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/70 , H04N19/146 , H04N19/196 , H04N19/96
Abstract: A method for visual media processing, including performing a conversion between a current chroma video block of visual media data and a bitstream representation of the current chroma video block. During the conversion, a chroma residual of the current chroma video block is scaled based on a scaling coefficient. The scaling coefficient is derived at least based on luma samples located in predefined positions.
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公开(公告)号：US11632548B2
公开(公告)日：2023-04-18
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 , H04N19/132 , H04N19/137 , H04N19/176 , H04N19/139 , H04N19/159 , H04N19/52 , H04N19/46
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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Patent Agency Ranking
公开(公告)号：US20230115118A1
公开(公告)日：2023-04-13
申请号：US17976189
申请日：2022-10-28
Inventor： Yang Wang , Li Zhang , Zhipin Deng , Kai Zhang , Hongbin Liu
IPC: H04N19/137 , H04N19/189 , H04N19/176 , H04N19/70
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 block of a video and a bitstream of the video according to a rule. The conversion is based on an adaptive motion vector difference resolution (AMVR) tool, and the rule specifies that selection of a context for a first bin within a bin string of a first syntax element that specifies the resolution of the motion vector difference associated with an AMVR shift is derived based on usage of a coding mode for the block.
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公开(公告)号：US11627333B2
公开(公告)日：2023-04-11
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：US11627313B2
公开(公告)日：2023-04-11
申请号：US17521012
申请日：2021-11-08
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/109 , H04N19/139 , H04N19/46 , H04N19/52 , H04N19/105 , H04N19/157 , H04N19/176 , H04N19/513
Abstract: A method of visual media processing includes determining whether to use an affine adaptive motion vector resolution (AMVR) technique on visual media data relying on a control information related to the affine AMVR technique in a bitstream representation of the visual media data, wherein the control information is included or excluded from the bitstream representation based on a rule; and performing a conversion between the visual media data and the bitstream representation of the visual media data.
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公开(公告)号：US11627308B2
公开(公告)日：2023-04-11
申请号：US17126707
申请日：2020-12-18
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/159 , H04N19/176 , H04N19/30 , H04N19/517 , H04N19/137
Abstract: A video processing method includes deriving multiple temporal motion vector prediction (TMVP) candidates for a video block in a current picture based on multiple blocks associated with a second block in one or more pictures that are temporally co-located with the current picture, wherein the current picture is excluded from the one or more pictures, and the second block is temporally collocated with the video block, wherein the second block has a same size as the video block, and wherein a relative position of the second block to a top-left corner of a second picture of the one or more pictures is same as that of the video block to a top-left corner of the current picture; adding the multiple TMVP candidates to a motion candidate list associated with the video block; and performing a conversion between the video block and a bitstream.
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公开(公告)号：US11622131B2
公开(公告)日：2023-04-04
申请号：US17400397
申请日：2021-08-12
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/11 , H04N19/12 , H04N19/70 , H04N19/124 , H04N19/176 , H04N19/186 , H04N19/61 , H04N19/46
Abstract: A video processing method is provided to include: performing a conversion between a current video block of a video and a coded representation of the video, wherein the coded representation conforms to a format rule that specifies a last non-zero coefficient in a residual of the current video block and controls whether or how side information about a secondary transform tool is included in the coded representation, and 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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