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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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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：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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Patent Agency Ranking
公开(公告)号：US12041237B2
公开(公告)日：2024-07-16
申请号：US17891800
申请日：2022-08-19
Inventor： Kai Zhang , Li Zhang , Ye-kui Wang , Zhipin Deng , Kui Fan , Jizheng Xu , Hongbin Liu
IPC: H04N19/103 , H04N19/119 , H04N19/129 , H04N19/157 , H04N19/169 , H04N19/172 , H04N19/174 , H04N19/70
CPC classification number: H04N19/129 , H04N19/103 , H04N19/119 , H04N19/157 , H04N19/172 , H04N19/174 , H04N19/1883 , 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 picture that includes one or more tiles and one or more rectangular slices and a bitstream of the video according to a rule. The rule specifies that, for iteratively determining information about the one or more rectangular slices, a variable indicating a tile index is updated only for slices having indices that are smaller than a value equal to a number of slices in the video picture minus 1.
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公开(公告)号：US12028535B2
公开(公告)日：2024-07-02
申请号：US17714480
申请日：2022-04-06
Inventor： Li Zhang , Kai Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/00 , H04N19/117 , H04N19/159 , H04N19/186 , H04N19/70
CPC classification number: H04N19/186 , H04N19/117 , H04N19/159 , H04N19/70
Abstract: A method for video processing is provided to include: performing a conversion between a current video block of a video and a coded representation of current video block, wherein 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, and wherein information used for the coding mode is signaled in a parameter set that is different from a sequence parameter set (SPS), a video parameter set (VPS), a picture parameter set (PPS), or an adaptation parameter set (APS) used for carrying adaptive loop filtering (ALF) parameters.
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公开(公告)号：US12003766B2
公开(公告)日：2024-06-04
申请号：US17942552
申请日：2022-09-12
Inventor： Zhipin Deng , Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu
IPC: H04N19/593 , H04N19/70
CPC classification number: H04N19/593 , 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 encoding a current video block of a video using a matrix intra prediction (MIP) mode in which a prediction block of the current video block is determined 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; and adding, to a coded representation of the current video block, a syntax element indicative of applicability of the MIP mode to the current video block using arithmetic coding in which a context for the syntax element is derived based on a rule.
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公开(公告)号：US12003711B2
公开(公告)日：2024-06-04
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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公开(公告)号：US20240171753A1
公开(公告)日：2024-05-23
申请号：US18513134
申请日：2023-11-17
Inventor： Kai Zhang , Li Zhang , Hongbin Liu , Jizheng Xu , Yue Wang
IPC: H04N19/159 , H04N19/105 , H04N19/107 , H04N19/117 , H04N19/176 , H04N19/186 , H04N19/577 , H04N19/96
CPC classification number: H04N19/159 , H04N19/105 , H04N19/107 , H04N19/117 , H04N19/176 , H04N19/186 , H04N19/577 , H04N19/96
Abstract: Techniques for implementing video processing techniques are described. In one example implementation, a method of video processing includes determining, for a conversion between a current block of a video and a bitstream representation of the video, whether a combined inter and intra prediction (CIIP) coding technique is to be applied to the current block based on a characteristic of the current block. The CIIP coding technique uses an intermedia inter prediction value and an intermedia intra prediction value to derive a final prediction value of the current block. The method also includes performing the conversion based on the determining.
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