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公开(公告)号：US11930185B2
公开(公告)日：2024-03-12
申请号：US17246794
申请日：2021-05-03
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/11 , H04N19/132 , H04N19/149 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/30 , H04N19/50 , H04N19/593 , H04N19/70
CPC classification number: H04N19/149 , H04N19/105 , H04N19/11 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/30 , H04N19/50 , H04N19/593 , H04N19/70
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：US11930182B2
公开(公告)日：2024-03-12
申请号：US17359890
申请日：2021-06-28
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/137 , H04N19/105 , H04N19/119 , H04N19/176 , H04N19/186
CPC classification number: H04N19/137 , H04N19/105 , H04N19/119 , H04N19/176 , H04N19/186
Abstract: A method for processing video data, including: deriving one or more motion vectors for a first set of sub-blocks belonging to a first dividing pattern of a current video block of a video; and performing, based on the one or more motion vectors, a conversion between the current video block and a bitstream of the video.
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公开(公告)号：US20240080496A9
公开(公告)日：2024-03-07
申请号：US18075999
申请日：2022-12-06
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/82 , H04N19/117 , H04N19/17 , H04N19/174 , H04N19/176 , H04N19/96
CPC classification number: H04N19/82 , H04N19/117 , H04N19/17 , H04N19/174 , H04N19/176 , H04N19/96
Abstract: A method of processing video data includes determining that a non-linear adaptive loop filtering operation is applied for a current video region of a video; deriving a first filtering index for the current video region and deriving a first filtering parameter based on the first filtering index; deriving a first clipping parameter from a clipping parameter set based on the first filtering index; performing a clipping operation that is part of the non-linear adaptive loop filtering operation based on the first clipping parameter, where the first clipping parameter is used to clip differences between reference sample values of a current sample value of the current video region and the current sample value before applying the first filtering parameter; and performing a conversion between the current video region and a bitstream of the video based on the non-linear adaptive loop filtering operation.
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公开(公告)号：US20240080442A1
公开(公告)日：2024-03-07
申请号：US18490317
申请日：2023-10-19
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/11 , H04N19/12 , H04N19/124 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/593 , H04N19/61
CPC classification number: H04N19/11 , H04N19/12 , H04N19/124 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/593 , H04N19/61 , H04N19/132
Abstract: A method of video processing is described. The method includes determining, for a conversion between a current video block of a video unit of a video and a coded representation of the video, a default intra prediction mode for the video unit coded using a certain intra prediction mode such that a prediction block of the current video block is generated without extrapolating neighboring pixels of the current video block along a direction; and performing the conversion based on the determining.
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公开(公告)号：US20240080441A1
公开(公告)日：2024-03-07
申请号：US18502636
申请日：2023-11-06
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/70
CPC classification number: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , 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 conversion between a current video block of a video and a bitstream representation of the current video block according to a rule, where the rule specifies a relationship between samples of the current video block and matrices or offset values applied in a matrix weighted intra prediction (MIP) mode during the conversion, and where the MIP mode includes determining a prediction block of the current video block by performing, on previously coded samples of the video, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation.
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Patent Agency Ranking
公开(公告)号：US11924432B2
公开(公告)日：2024-03-05
申请号：US17572810
申请日：2022-01-11
Inventor： Weijia Zhu , Li Zhang , Jizheng Xu , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/00 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/70
CPC classification number: H04N19/132 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/70
Abstract: Devices, systems and methods for palette mode coding are described. An exemplary method for video processing includes performing a conversion between a block of a video and a bitstream representation of the video. The bitstream representation is processed according to a format rule that specifies a first indication of usage of a palette mode and a second indication of usage of an intra block copy (IBC) mode are signaled dependent of each other.
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公开(公告)号：US11917211B2
公开(公告)日：2024-02-27
申请号：US17892746
申请日：2022-08-22
Inventor： Kai Zhang , Li Zhang , Ye-Kui Wang , Zhipin Deng , Kui Fan , Jizheng Xu , Hongbin Liu
IPC: H04N11/02 , H04N19/96 , H04N19/184 , H04N19/70 , H04N19/174 , H04N19/119 , H04N19/129 , H04N19/172 , H04N19/176
CPC classification number: H04N19/96 , H04N19/119 , H04N19/129 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/184 , H04N19/70
Abstract: Techniques for video processing, including video coding, video decoding and video transcoding are described. One example method includes performing a conversion between a video including a video picture including a video tile including one or more slices and a bitstream of the video according to a rule. The rule specifies that a second slice in a tile that includes a first slice in a picture has a height that is represented in a unit of coding tree units. The first slice has a first slice index, and the second slice has a second slice index that is determined based on the first slice index and a number of explicitly provided slice heights in the video tile. The height of the second slice is determined based on the first slice index and the second slice index.
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公开(公告)号：US20240056612A1
公开(公告)日：2024-02-15
申请号：US18484899
申请日：2023-10-11
Inventor： Wenbin Yin , Li Zhang , Kai Zhang , Yang Wang , Hongbin Liu
IPC: H04N19/82 , H04N19/132 , H04N19/126
CPC classification number: H04N19/82 , H04N19/132 , H04N19/126
Abstract: A mechanism for processing video data is disclosed. A conversion is performed between a visual media data including a video unit and a bitstream. The conversion can be performed by a video encoder and/or a video decoder. The video unit is reconstructed, and a guided filter is applied to reconstructed samples in the video unit.
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公开(公告)号：US20240056584A1
公开(公告)日：2024-02-15
申请号：US18488247
申请日：2023-10-17
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Zhipin Deng , Yue Wang
IPC: H04N19/137 , H04N19/105 , H04N19/176 , H04N19/70
CPC classification number: H04N19/137 , H04N19/105 , H04N19/176 , H04N19/70
Abstract: Symmetric motion vector difference coding is described. One example video processing method includes determining, for a conversion between a block of a current picture of video and a bitstream representation of the block, whether a symmetric motion vector difference (SMVD) mode is allowable for the block. Whether the SMVD mode is allowable depends on a derivation process of two target reference pictures of the current picture, which includes a first step for searching a forward target reference picture in the reference picture list 0 and searching a backward target reference picture in the reference picture list 1, and a second step for searching a backward target reference picture in the reference picture list 0 and searching a forward target reference picture in the reference picture list 1. Outputs of the first and second steps are independent of each other. The method further includes performing the conversion based on the determination.
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公开(公告)号：US11902529B2
公开(公告)日：2024-02-13
申请号：US17968536
申请日：2022-10-18
Inventor： Yang Wang , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/70 , H04N19/80 , H04N19/11 , H04N19/124 , H04N19/136 , H04N19/593
CPC classification number: H04N19/132 , H04N19/105 , H04N19/11 , H04N19/124 , H04N19/136 , H04N19/176 , H04N19/186 , H04N19/593 , H04N19/70 , H04N19/80
Abstract: A method of video processing is provided to include determining, for a conversion between a video block of a video and a bitstream of the video, a parameter of a cross-component linear model (CCLM) for the video block according to a rule, and performing the conversion based on the determining, and wherein the rule specifies to use a variable representing a neighbouring luma sample in the determining of the parameter of the CCLM only in case that the variable has a certain value.
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