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51.发明授权公开(公告)号：US11838537B2
公开(公告)日：2023-12-05
申请号：US17230128
申请日：2021-04-14
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/176 , H04N19/184 , H04N19/105 , H04N19/159 , H04N19/513 , H04N19/56 , H04N19/137 , H04N19/30
CPC classification number: H04N19/52 , H04N19/105 , H04N19/137 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/30 , H04N19/513 , H04N19/56
Abstract: Devices, systems and methods for the simplification of sub-block motion candidate lists for video coding are described. In a representative aspect, a method for video processing includes determining, during a conversion between a current block of a video and a bitstream representation of the video, a temporal motion vector prediction candidate based on a temporal neighboring block of the current block. The temporal neighboring block is identified based on motion information of a spatial neighboring block selected from one or more spatial neighboring blocks that are different from at least one spatial neighboring block used in a merge list construction process of a video block. The method also includes performing the conversion based on the temporal motion vector prediction candidate.
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公开(公告)号：US11831876B2
公开(公告)日：2023-11-28
申请号：US17362341
申请日：2021-06-29
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/132 , H04N19/176 , H04N19/423 , H04N19/96
CPC classification number: H04N19/132 , H04N19/176 , H04N19/423 , H04N19/96
Abstract: A method of visual media processing includes determining, for a conversion between a current video block of visual media data and a bitstream representation of the current video block, a buffer that stores reference samples for prediction in an intra block copy mode; for a sample spatially located at location of the current video block relative to an upper-left position of a coding tree unit including the current video block and having a block vector, computing a corresponding reference in the buffer at a reference location, wherein the reference location is determined using the block vector and the location; and upon determining that the reference location lies outside the buffer, re-computing the reference location based at least in part on a location of the current video block relative to the coding tree unit including the current video block.
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公开(公告)号：US11805274B2
公开(公告)日：2023-10-31
申请号：US17360868
申请日：2021-06-28
Inventor： Jizheng Xu , Jiahao Li , Weijia Zhu , Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/56 , H04N19/139 , H04N19/176 , H04N19/52 , H04N19/105 , H04N19/147 , H04N19/513 , H04N19/537 , H04N19/137 , H04N19/543 , H04N19/132 , H04N19/567
CPC classification number: H04N19/56 , H04N19/105 , H04N19/137 , H04N19/139 , H04N19/147 , H04N19/176 , H04N19/513 , H04N19/52 , H04N19/537 , H04N19/543 , H04N19/132 , H04N19/567
Abstract: Methods, systems and device for hash-based motion estimation in video coding are described. An exemplary method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, motion information associated with the current block using a hash-based motion search, a size of the current block being M×N, M and N being positive integers and M being not equal to N, applying, based on the motion information and a video picture comprising the current block, a prediction for the current block, and performing, based on the prediction, the conversion.
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公开(公告)号：US11805252B2
公开(公告)日：2023-10-31
申请号：US17401462
申请日：2021-08-13
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/119 , H04N19/176 , H04N19/96 , H04N19/46
CPC classification number: H04N19/119 , H04N19/176 , H04N19/46 , H04N19/96
Abstract: Non-power-two-partition tree in video compression is described. In an exemplary aspect, a method for video processing includes determining, for a conversion between a first block of video and a bitstream representation of the first block of video, whether a use of non-power-of-two partition trees (NPT-T) is enabled or disabled, wherein the NPT-T includes splitting the first block to multiple smaller sized child blocks of the first block, and at least one child block's width and/or height have a dimension that is a non-power-of-two integer; and performing the conversion based on the NPT-T in response to the determination that the NPT-T is enabled.
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公开(公告)号：US11800155B2
公开(公告)日：2023-10-24
申请号：US17882375
申请日：2022-08-05
Inventor： Jizheng Xu , Li Zhang , Ye-kui Wang , Kai Zhang , Weijia Zhu , Yue Wang
IPC: H04N19/86 , H04N19/117 , H04N19/172 , H04N19/186 , H04N19/196 , H04N19/70 , H04N19/167
CPC classification number: H04N19/86 , H04N19/117 , H04N19/172 , H04N19/186 , H04N19/196 , H04N19/70 , H04N19/167
Abstract: A method includes performing a conversion between a block of a video and a bitstream of the video according to a rule. The rule specifies that whether a syntax element identifying a deblocking offset for a chroma component of the video is included in a video region level is determined based on a colour format of the video.
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Patent Agency Ranking
公开(公告)号：US11800090B2
公开(公告)日：2023-10-24
申请号：US17568599
申请日：2022-01-04
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Zhipin Deng , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/70
CPC classification number: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/70
Abstract: A method of video processing includes making a first determination about whether a decoder-side motion vector refinement (DMVR) tool is enabled for a conversion between a current block of a current picture of a video and a coded representation of the video; making a second determination, based on the first determination, about whether or how to clip a motion vector according to a bounding block for reference sample padding in a reference picture used for determining a prediction block for the current block according to a rule, and performing the conversion based on the first determination and the second determination. By using the DMVR tool, an encoded motion vector from the coded representation is refined prior to using for determining the prediction block.
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公开(公告)号：US20230336724A1
公开(公告)日：2023-10-19
申请号：US18339046
申请日：2023-06-21
Inventor： Li Zhang , Kai Zhang , Jizheng Xu , Hongbin Liu , Yue Wang
IPC: H04N19/12 , H04N19/176 , H04N19/18 , H04N19/48 , H04N19/60
CPC classification number: H04N19/12 , H04N19/176 , H04N19/18 , H04N19/48 , 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：US11778226B2
公开(公告)日：2023-10-03
申请号：US17237402
申请日：2021-04-22
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/176 , H04N19/184
CPC classification number: H04N19/52 , H04N19/176 , H04N19/184
Abstract: The present disclosure relates to storage of motion information for affine mode. A video processing method is provided, including: selecting, during a current affine calculation step in a conversion between a current block and a bitstream representation of the current block, one or more parameters of a set of affine model parameters; storing the one or more parameters for the current block; and performing, based on the one or more parameters, the conversion between the current block and the bitstream representation of the current block.
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公开(公告)号：US11765398B2
公开(公告)日：2023-09-19
申请号：US17128965
申请日：2020-12-21
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Hsiao Chiang Chuang , Yue Wang
IPC: H04N19/96 , H04N19/119 , H04N19/13 , H04N19/132 , H04N19/176 , H04N19/513 , H04N19/186
CPC classification number: H04N19/96 , H04N19/119 , H04N19/13 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/513
Abstract: Devices, systems and methods for picture border coding are described. In a representative aspect, a method for processing picture includes segmenting a picture into one or multiple picture segments, determining that a first block of a picture segment covers at least one region that is outside a border of the picture segment, wherein a size of the first block is M×N pixels, selecting a second block of size K×L pixels, where (K≤M and L
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公开(公告)号：US20230291930A1
公开(公告)日：2023-09-14
申请号：US18301846
申请日：2023-04-17
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/593 , H04N19/11 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/186
CPC classification number: H04N19/593 , H04N19/11 , H04N19/117 , H04N19/132 , H04N19/176 , H04N19/186
Abstract: A method of video processing is described. The method includes: determining, based on a coding mode of a current video block of a video, whether a position dependent intra prediction combination (PDPC) method is used for coding the current video block based on a first rule, and performing a conversion between the current video block and a coded representation of the video according to the determining, wherein the PDPC method combines neighboring samples with a prediction signal of the current video block to generate a refined prediction signal of the current video block.
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