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公开(公告)号：US11985340B2
公开(公告)日：2024-05-14
申请号：US17319909
申请日：2021-05-13
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/423 , H04N19/105 , H04N19/137 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/196 , H04N19/30 , H04N19/513 , 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: History-based affine parameters inheritance 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, affine related information associated with an affine model to be used by the current block based on affine related information associated with an affine model used by a first block stored in a buffer, wherein the first block is affine coded prior to the current block; and performing the conversion by using the derived affine related information.
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公开(公告)号：US11985317B2
公开(公告)日：2024-05-14
申请号：US18154333
申请日：2023-01-13
Inventor： Jizheng Xu , Kai Zhang , Li Zhang , Hongbin Liu , Zhipin Deng , Yue Wang
IPC: H04N19/122 , H04N19/103 , H04N19/132 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/186 , H04N19/30 , H04N19/46 , H04N19/60 , H04N19/124
CPC classification number: H04N19/122 , H04N19/103 , H04N19/132 , H04N19/172 , H04N19/176 , H04N19/18 , H04N19/186 , H04N19/30 , H04N19/46 , H04N19/60 , H04N19/124
Abstract: Methods, systems, and devices for coefficient scaling for high-precision image and video coding are described. An example method of video processing includes performing a conversion between a current block of a video and a bitstream representation of the video according to a rule. The rule specifies that the conversion includes during encoding, skipping applying a forward transform to residual coefficients of the current block prior to including in the bitstream representation, or during decoding, reconstructing residual coefficients of the current block from the bitstream representation without applying an inverse transform. The rule further specifies that a scale factor is applied to the residual coefficients independent of a size of the current block.
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公开(公告)号：US11979567B2
公开(公告)日：2024-05-07
申请号：US17982038
申请日：2022-11-07
Inventor： Yang Wang , Li Zhang , Hongbin Liu , Kai Zhang , Zhipin Deng , Yue Wang
IPC: H04N19/00 , H04N19/117 , H04N19/186 , H04N19/96
CPC classification number: H04N19/117 , H04N19/186 , H04N19/96
Abstract: A method for video processing is described. The method includes determining, for a conversion between a video unit of a video and a bitstream representation of the video, whether to enable a mirrored padding process for padding an unavailable luma sample during an application of a loop filtering tool to the video unit; and performing the conversion based on the determining.
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公开(公告)号：US11973931B2
公开(公告)日：2024-04-30
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：US11968361B2
公开(公告)日：2024-04-23
申请号：US17523131
申请日：2021-11-10
Inventor： Li Zhang , Weijia Zhu , Kai Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/82
CPC classification number: H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/82
Abstract: In an exemplary aspect, a method for visual media processing includes identifying a boundary at a vertical edge and/or a horizontal edge of two video blocks; calculating a boundary strength of a filter based on at least one of the two video blocks crossing a vertical edge or a horizontal edge is coded using a combined intra-inter prediction (CIIP) mode; deciding whether to turn on or off the filter; selecting a strength of the filter in case the filter is turned on; and performing, based on the selecting, a deblocking filter (DB) process to the video blocks.
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Patent Agency Ranking
公开(公告)号：US20240121410A1
公开(公告)日：2024-04-11
申请号：US18528070
申请日：2023-12-04
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/176 , H04N19/105 , H04N19/107 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/167 , H04N19/583
CPC classification number: H04N19/176 , H04N19/105 , H04N19/107 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/139 , H04N19/159 , H04N19/167 , H04N19/583
Abstract: Devices, systems and methods for applying intra-block copy (IBC) in video coding are described. In general, methods for integrating IBC with existing motion compensation algorithms for video encoding and decoding are described. In a representative aspect, a method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using a motion compensation algorithm, and encoding, based on the determining, the current block by selectively applying an intra-block copy to the current block. In a representative aspect, another method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using an intra-block copy, and encoding, based on the determining, the current block by selectively applying a motion compensation algorithm to the current block.
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公开(公告)号：US11956448B2
公开(公告)日：2024-04-09
申请号：US18076869
申请日：2022-12-07
Inventor： Kai Zhang , Yuwen He , Li Zhang , Hongbin Liu , Tianliang Fu , Junru Li , Siwei Ma
IPC: H04N19/157 , H04N19/176 , H04N19/186
CPC classification number: H04N19/157 , H04N19/176 , H04N19/186
Abstract: Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of processing video data includes determining, for a conversion between a video block of a video and a bitstream of the video, a gradient of a prediction vector at a sub-block level for the video block according to a rule, wherein the rule specifies to use a same gradient value is assigned for all samples within a sub-block of the video block; and performing the conversion based on the determining.
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公开(公告)号：US11956439B2
公开(公告)日：2024-04-09
申请号：US17977471
申请日：2022-10-31
Inventor： Zhipin Deng , Li Zhang , Hongbin Liu , Kai Zhang , Jizheng Xu
IPC: H04N19/132 , H04N19/105 , H04N19/176 , H04N19/186 , H04N19/30 , H04N19/70
CPC classification number: H04N19/132 , H04N19/105 , H04N19/176 , H04N19/186 , H04N19/30 , H04N19/70
Abstract: A method for visual media processing includes performing a conversion between a current video unit of a visual media data and a bitstream representation of the current video unit. The bitstream representation is configured according to a format rule. The format rule specifies a level of a video segment at which one or more syntax elements indicative of a scaling factor by which a chroma residual is scaled for coding the current video unit is selectively included in the bitstream representation.
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公开(公告)号：US11956432B2
公开(公告)日：2024-04-09
申请号：US17723175
申请日：2022-04-18
Inventor： Kai Zhang , Zhipin Deng , Hongbin Liu , Li Zhang , Jizheng Xu
IPC: H04N19/00 , H04N19/117 , H04N19/119 , H04N19/132 , H04N19/176 , H04N19/186 , H04N19/46 , H04N19/70 , 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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40.发明授权公开(公告)号：US11956431B2
公开(公告)日：2024-04-09
申请号：US17358700
申请日：2021-06-25
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/119 , H04N19/105 , H04N19/139 , H04N19/157 , H04N19/172 , H04N19/174 , H04N19/176 , H04N19/52 , H04N19/70
CPC classification number: H04N19/119 , H04N19/105 , H04N19/139 , H04N19/157 , H04N19/176 , H04N19/52 , H04N19/70 , H04N19/172 , H04N19/174
Abstract: A method for processing a video includes performing a determination, by a processor, that a first video block is partitioned to include a first prediction portion that is non-rectangular and non-square; adding a first motion vector (MV) prediction candidate associated with the first prediction portion to a motion candidate list associated with the first video block, wherein the first MV prediction candidate is derived from a sub-block MV prediction candidate; and performing further processing of the first video block using the motion candidate list.
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