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公开(公告)号：US11902550B2
公开(公告)日：2024-02-13
申请号：US17319950
申请日：2021-05-13
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/423 , H04N19/105 , H04N19/159 , H04N19/176 , H04N19/137 , H04N19/30 , H04N19/513 , H04N19/167 , H04N19/196 , H04N19/52
CPC classification number: H04N19/423 , H04N19/105 , H04N19/137 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/196 , H04N19/30 , H04N19/513 , H04N19/52
Abstract: Pruning method for History-based affine parameters is described. In an exemplary aspect, a method for video processing includes deriving, for a conversion between a current block of video and a bitstream representation of the current block, a first set of affine parameters associated with affine model for the current block; comparing the first set of affine parameters to one or more of sets of affine parameters stored in a buffer for storing affine parameters so as to determine whether the first set of affine parameters is same or similar to at least one set of affine parameters; and deciding whether or how to update the buffer for storing affine parameters based on the determination.
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公开(公告)号：US11902507B2
公开(公告)日：2024-02-13
申请号：US17330501
申请日：2021-05-26
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N7/12 , H04N19/105 , H04N19/117 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/186 , H04N19/189
CPC classification number: H04N19/105 , H04N19/117 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/186 , H04N19/189
Abstract: A method for video processing is provided. The method includes determining, for a conversion between a current video block of a video and a coded representation of the video, a context that is used to code a flag using arithmetic coding in the coded representation of the current video block, wherein the context is based on whether a top-left neighboring block of the current video block is coded using a cross-component linear model (CCLM) prediction mode; and performing the conversion based on the determining.
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公开(公告)号：US20240022717A1
公开(公告)日：2024-01-18
申请号：US18458661
申请日：2023-08-30
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu
IPC: H04N19/11 , H04N19/105 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/593
CPC classification number: H04N19/11 , H04N19/105 , H04N19/132 , H04N19/52 , H04N19/176 , H04N19/593 , H04N19/159
Abstract: Methods and an apparatus for video processing are described. One example method includes determining, for a conversion between a video block of a video and a bitstream of the video, that the video block satisfies a condition. The video block is coded in the bitstream using an intra block copy mode. The method further includes performing the conversion based on the determining. Here, due to the video block satisfying the condition, a portion of an intra block copy buffer is reset during the conversion.
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公开(公告)号：US11871025B2
公开(公告)日：2024-01-09
申请号：US17554294
申请日：2021-12-17
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/513 , H04N19/137 , G06F7/499 , H04N19/176 , G06F5/01 , H04N19/105
CPC classification number: H04N19/513 , G06F5/01 , G06F7/49978 , H04N19/105 , H04N19/137 , H04N19/176
Abstract: Devices, systems and methods for digital video coding, which include sub-block based inter prediction methods, are described. An exemplary method for video processing includes determining, for a conversion between a current block of video and a bitstream representation of the video, a maximum number of candidates in a sub-block based merge candidate list and/or whether to add sub-block based temporal motion vector prediction (SbTMVP) candidates to the sub-block based merge candidate list based on whether temporal motion vector prediction (TMVP) is enabled for use during the conversion or whether a current picture referencing (CPR) coding mode is used for the conversion, and performing, based on the determining, the conversion.
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公开(公告)号：US11870989B2
公开(公告)日：2024-01-09
申请号：US17723175
申请日：2022-04-18
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/00 , H04N19/119 , H04N19/132 , H04N19/176 , H04N19/70 , H04N19/117 , 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 determining, for a conversion between a block of a first sub-picture of a video and a bitstream representation of the video, whether to apply a deblocking process across an edge between the block and a neighboring block of a second sub-picture based on whether a loop filtering process is allowed across subpicture boundaries. The method also includes performing the conversion based on the determining.
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Patent Agency Ranking
公开(公告)号：US11863715B2
公开(公告)日：2024-01-02
申请号：US17842025
申请日：2022-06-16
Inventor： Weijia Zhu , Jizheng Xu , Li Zhang , Yue Wang
IPC: H04N19/60 , H04N19/105 , H04N19/176 , H04N19/186
CPC classification number: H04N19/60 , H04N19/105 , H04N19/176 , H04N19/186
Abstract: Methods, systems and devices for implementing adaptive color transform (ACT) and block based delta pulse code modulation (BDPCM) during image/video encoding or decoding are described. An example method of video processing includes determining, for a conversion between a current video unit of a video that is a chroma video unit and a bitstream representation of the video, whether a block-based delta pulse code modulation (BDPCM) mode is available based on a rule, and performing the conversion based on the determining, wherein the rule is based on whether an adaptive color transform (ACT) mode is used for coding the current video unit and/or whether the BDPCM mode is used for coding a luma video unit corresponding to the current video unit.
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公开(公告)号：US11856195B2
公开(公告)日：2023-12-26
申请号：US17723089
申请日：2022-04-18
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/70 , H04N19/119 , H04N19/117 , H04N19/132 , H04N19/82 , H04N19/186 , H04N19/46 , H04N19/176
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：US20230396759A1
公开(公告)日：2023-12-07
申请号：US18452736
申请日：2023-08-21
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Zhipin Deng , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/132 , H04N19/70 , H04N19/176 , H04N19/186 , H04N19/159
CPC classification number: H04N19/105 , H04N19/132 , H04N19/70 , H04N19/176 , H04N19/186 , H04N19/159
Abstract: An example method of video processing includes determining, for a conversion between a current picture of a video and a coded representation of the video, a position of a reference sample in a reference picture that is associated with the current picture based on a top-left position of a window of a picture. The picture includes at least the current picture or the reference picture, and the window is subject to a processing rule during the conversion. The method also includes performing the conversion based on the determining.
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公开(公告)号：US11831901B2
公开(公告)日：2023-11-28
申请号：US17316300
申请日：2021-05-10
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Jizheng Xu , Yue Wang
IPC: H04N19/00 , H04N19/52 , H04N19/109 , H04N19/176 , H04N19/46 , H04N19/105 , H04N19/139 , H04N19/184 , H04N19/70 , H04N19/129 , H04N19/137 , H04N19/196
CPC classification number: H04N19/52 , H04N19/105 , H04N19/109 , H04N19/129 , H04N19/137 , H04N19/139 , H04N19/176 , H04N19/184 , H04N19/196 , H04N19/46 , H04N19/70
Abstract: A method of video processing is provided. The method includes: determining, for a conversion between a current video block of a video and a coded representation of the video, a mode of operation of a generalized bi-prediction (GBi) coding tool in which a prediction of the current video block uses a final predictor corresponding to a non-uniformly weighted sum of predictors from two reference lists; and performing the conversion based on the determining, wherein a field in the coded representation corresponds to the mode of operation and a value of the field indicates whether the GBI coding tool is enabled or disabled for the current video block.
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公开(公告)号：US11825123B2
公开(公告)日：2023-11-21
申请号：US17888227
申请日：2022-08-15
Inventor： Kai Zhang , Li Zhang , Yang Wang , Ye-kui Wang , Zhipin Deng , Jizheng Xu , Hongbin Liu
IPC: H04N19/70 , H04N19/174 , H04N19/186 , H04N19/46 , H04N19/117 , H04N19/172 , H04N19/82 , H04N19/119 , H04N19/635
CPC classification number: H04N19/70 , H04N19/117 , H04N19/119 , H04N19/172 , H04N19/174 , H04N19/186 , H04N19/46 , H04N19/635 , H04N19/82
Abstract: A method includes performing a conversion between a video comprising a video unit and a bitstream of the video, wherein the bitstream conforms to a format rule, and wherein the format rule specifies that a first syntax element indicating whether an in-loop filtering operation is performed across tile boundaries is selectively included in the bitstream based on whether or how the video unit is partitioned into tiles.
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