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公开(公告)号：US12096021B2
公开(公告)日：2024-09-17
申请号：US17949045
申请日：2022-09-20
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/105 , H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/30 , H04N19/52 , H04N19/70
CPC classification number: H04N19/52 , H04N19/105 , H04N19/117 , H04N19/132 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/30 , H04N19/70
Abstract: A method for video processing includes performing a conversion between a current video block of a video region of a video and a coded representation of the video. The conversion uses a coding mode in which the current video block is constructed based on a first domain and a second domain and/or chroma residue is scaled in a luma-dependent manner. A parameter set in the coded representation comprises parameter information for the coding mode.
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公开(公告)号：US12096013B2
公开(公告)日：2024-09-17
申请号：US18172484
申请日：2023-02-22
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/33 , H04N19/11 , H04N19/12 , H04N19/124 , H04N19/136 , H04N19/157 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/18 , H04N19/30 , H04N19/50 , H04N19/61 , H04N19/70
CPC classification number: H04N19/33 , H04N19/12 , H04N19/124 , H04N19/136 , H04N19/157 , H04N19/159 , H04N19/167 , H04N19/176 , H04N19/18 , H04N19/30 , H04N19/50 , H04N19/61 , H04N19/70 , H04N19/11
Abstract: A video processing method includes performing a conversion between a video block of a video and a coded representation of the video. The coded representation conforms to a format rule. The format rule specifies that applicability of a transform skip mode to the video block is determined by a coding condition of the video block. The format rule also specifies that a syntax element indicative of applicability of the transform skip mode is omitted from the coded representation. The transform skip mode includes skipping applying a forward transform to at least some coefficients prior to encoding into the coded representation, or during decoding, skipping applying an inverse transform to at least some coefficients prior to decoding from the coded representation.
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公开(公告)号：US12088837B2
公开(公告)日：2024-09-10
申请号：US17975005
申请日：2022-10-27
Inventor： Hongbin Liu , Li Zhang , Kai Zhang , Yue Wang
IPC: H04N19/52 , H04N19/176 , H04N19/184
CPC classification number: H04N19/52 , H04N19/176 , H04N19/184
Abstract: A video processing method includes generating, for a conversion between a current block of a video and a bitstream representation of the video, a motion vector for the current block; invoking a weighted prediction processing tool or a second processing tool in a mutually exclusive manner; and performing the conversion according to the invoking. The invoking of the second processing tool comprises refining the motion vector.
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公开(公告)号：US12081758B2
公开(公告)日：2024-09-03
申请号：US17977433
申请日：2022-10-31
Inventor： Li Zhang , Kai Zhang , Zhipin Deng , Hongbin Liu , Na Zhang , Yue Wang
IPC: H04N19/124 , H04N19/12 , H04N19/127 , H04N19/167 , H04N19/176 , H04N19/70
CPC classification number: H04N19/124 , H04N19/12 , H04N19/127 , H04N19/167 , H04N19/176 , H04N19/70
Abstract: Devices, systems, and methods for lossless coding for visual media coding are described. An exemplary method for video processing includes determining, based on a current video block of a video satisfying a dimension constraint, that coding modes are enabled for representing the current video block in a bitstream representation, where the dimension constraint states that a same set of allowed dimensions for the current video block is disabled for the coding modes, and where, for an encoding operation, the coding modes represent the current video block in the bitstream representation without using a transform operation, or where, for a decoding operation, the coding modes are used to obtain the current video block without using an inverse transform operation; and performing a conversion between the current video block and the bitstream representation of the video based on one of the coding modes.
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公开(公告)号：US12069292B2
公开(公告)日：2024-08-20
申请号：US17209382
申请日：2021-03-23
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: A method of video processing includes: determining an affine mode type to be applied to a current block coded in an affine mode in a video frame, wherein the current block is split into a plurality of sub-blocks; and deriving motion information for each of the plurality of sub-blocks based on the affine mode type, at least one control point (CP) motion vector (MV) at a specific location being derived and stored for predicting other blocks to be processed subsequently.
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Patent Agency Ranking
公开(公告)号：US12069282B2
公开(公告)日：2024-08-20
申请号：US17461150
申请日：2021-08-30
Inventor： Jizheng Xu , Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/423 , H04N19/132 , H04N19/137 , H04N19/152 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/593 , H04N19/70 , H04N19/96
CPC classification number: H04N19/423 , H04N19/137 , H04N19/152 , H04N19/159 , H04N19/176 , H04N19/186 , H04N19/593 , H04N19/70 , H04N19/96 , H04N19/132
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：US20240275941A1
公开(公告)日：2024-08-15
申请号：US18615916
申请日：2024-03-25
IPC: H04N19/103 , H04N19/176
CPC classification number: H04N19/103 , H04N19/176
Abstract: A method for video processing comprises: determining, during a conversion between a target video block of a video and a bitstream of the video, an intra block copy (IBC)-based mode to be applied for the target video block based on at least one of: a mode based on affine motion compensated prediction, an affine IBC merge mode with block vector differences (MBVD), an intra template matching for IBC mode (TM_IBC), wherein a derived block vector (BV) is used as base candidates for the MBVD, an intra template matching for IBC mode (TM_IBC), wherein a derived BV is used as BV prediction candidate for IBC non-merge mode, an IBC prediction mode based on multi-hypothesis, a mode based on overlapped block motion compensation (OBMC), a mode based on geometric partitioning with the MBVD, or a mode based on geometric partitioning with TM; and performing the conversion based on the IBC-based mode.
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公开(公告)号：US12063371B2
公开(公告)日：2024-08-13
申请号：US17992246
申请日：2022-11-22
Inventor： Ye-kui Wang , Zhipin Deng , Kai Zhang , Li Zhang
IPC: H04N19/169 , H04N19/105 , H04N19/172 , H04N19/174 , H04N19/184 , H04N19/186 , H04N19/46 , H04N19/70 , H04N19/96
CPC classification number: H04N19/172 , H04N19/105 , H04N19/174 , H04N19/184 , H04N19/186 , H04N19/188 , H04N19/46 , H04N19/70 , H04N19/96
Abstract: Embodiments for video processing, including video coding, video decoding and video transcoding are described. One example method includes performing a conversion between a video having one or more layers having one or more video pictures having one or more subpictures and a bitstream of the video according to a rule, wherein the rule defines network abstraction layer (NAL) units to be extracted from a bitstream during a sub-bitstream extraction process to output a sub-bitstream, wherein the rule further specifies that one or more inputs to the sub-bitstream extraction process include a target output layer set (OLS) index (targetOlsIdx) that identifies an OLS index of a target OLS and is equal to an index to a list of OLSs specified by a video parameter set, and wherein the one or more inputs satisfy a set of conditions.
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公开(公告)号：US20240267554A1
公开(公告)日：2024-08-08
申请号：US18633867
申请日：2024-04-12
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Yue Wang
IPC: H04N19/52 , H04N19/105 , H04N19/139 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/88
CPC classification number: H04N19/52 , H04N19/105 , H04N19/139 , H04N19/159 , H04N19/176 , H04N19/184 , H04N19/88
Abstract: Devices, systems and methods for encoding and decoding digital video using a look-up tables (LUTs) containing motion candidates are described. A method of video processing includes maintaining one or more tables, at least one table of the one or more tables is associated with one or more entries, deriving, based on a first set of motion candidates in the at least one table, a second set of motion candidates, and performing, based on the second set of motion candidates, a conversion between a current block of a video and a bitstream representation of the video.
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公开(公告)号：US20240249441A1
公开(公告)日：2024-07-25
申请号：US18627287
申请日：2024-04-04
Inventor： Yingzhan XU , Kai Zhang , Li Zhang
IPC: G06T9/40
CPC classification number: G06T9/40
Abstract: Embodiments of the present disclosure provide a solution for point cloud coding. A method for point cloud coding is proposed. The method comprises: determining, during a conversion between a current PC sample of a point cloud sequence and a bitstream of the point cloud sequence, one or multiple reference PC samples for the current PC sample, wherein at least one reference frame comprising the one or multiple reference PC samples and a current frame comprising the current PC sample are in a GOF; and performing the conversion based on the one or multiple reference PC samples.
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