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公开(公告)号：US20220030220A1
公开(公告)日：2022-01-27
申请号：US17479192
申请日：2021-09-20
Inventor： Zhipin DENG , Li ZHANG , Hongbin Liu , Kai Zhang , Jizheng XU
IPC: H04N19/105 , H04N19/96 , H04N19/196 , H04N19/146 , H04N19/176
Abstract: A method for visual media processing, including performing a conversion between a current chroma chroma block of visual media data and a bitstream representation of the current chroma chroma block, wherein, during the conversion, a chroma residual of the current chroma chroma block is scaled based on a scaling coefficient, wherein the scaling coefficient is derived at least based on luma samples located in predefined positions.
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公开(公告)号：US20210297672A1
公开(公告)日：2021-09-23
申请号：US17343086
申请日：2021-06-09
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/132 , H04N19/105 , H04N19/12 , H04N19/60 , H04N19/159 , H04N19/176
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 applicability of a matrix based intra prediction (MIP) mode or a transform mode during the conversion, 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, and where the transform mode specifies use of a transform operation for the determining the prediction block for the current video block.
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公开(公告)号：US20210297671A1
公开(公告)日：2021-09-23
申请号：US17342996
申请日：2021-06-09
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/132 , H04N19/176 , H04N19/159 , H04N19/105
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 using a matrix based 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, where the performing the conversion includes deriving, according to a rule, boundary samples by applying a left bit shift operation or a right bit shift operation on a sum of at least one reference boundary sample, and where the rule determines whether to apply the left bit shift or the right bit shift operation.
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公开(公告)号：US20250159245A1
公开(公告)日：2025-05-15
申请号：US19022577
申请日：2025-01-15
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG
IPC: H04N19/52 , H04N19/139
Abstract: Embodiments of the disclosure provide a solution for video processing. A method for video processing is proposed. The method includes: determining, for a conversion between a video unit of a video and a bitstream of the video, that the video unit is coded by a motion pair from a same direction relative to a current picture, wherein the video unit is applied with an advanced motion vector prediction (AMVP) merge mode and the video unit belongs to a low-delay picture; and performing the conversion based on the motion pair.
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公开(公告)号：US20250080718A1
公开(公告)日：2025-03-06
申请号：US18286209
申请日：2022-04-08
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG
IPC: H04N19/105 , H04N19/139 , H04N19/176
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method of processing video data is proposed. The method comprises: during a conversion between a current video block of a video and a bitstream of the video, obtaining a geometric partitioning mode (GPM) block associated with the current video block; and performing the conversion based on a motion-compensated prediction sample refinement process applied to the GPM block. Compared with the conventional solution, the proposed solution advantageously improves coding efficiency and compression ratios.
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Patent Agency Ranking
公开(公告)号：US20250056065A1
公开(公告)日：2025-02-13
申请号：US18289975
申请日：2022-05-12
Inventor： Kai ZHANG , Li ZHANG , Zhipin DENG , Na ZHANG , Yang WANG
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: determining, during a conversion between a current video block of a video and a bitstream of the video, whether coding information of a reference video block is used to code a first piece of motion information of the current video block based on a coding pattern applied to the reference video block; and performing the conversion based on the determining. The method in accordance with the first aspect of the present disclosure improves the coding process of the current video block. Compared with the conventional solution, the proposed method can advantageously improve the coding efficiency and avoid the undesirable latency.
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公开(公告)号：US20240388731A1
公开(公告)日：2024-11-21
申请号：US18778798
申请日：2024-07-19
Inventor： Zhipin DENG , Kai Zhang , Li Zhang
IPC: H04N19/52 , H04N19/105 , H04N19/132 , H04N19/139 , H04N19/167 , H04N19/176
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: determining, during a conversion between a video unit of a video and a bitstream of the video unit, whether at least one of: a first set of samples or a second set of is outside a boundary associated with the video unit; applying a weighting process to the first set of samples and the second set of samples based on the determining; generating a prediction based on the weighted first and second sets of samples; and performing the conversion based on the prediction.
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公开(公告)号：US20240372981A1
公开(公告)日：2024-11-07
申请号：US18286202
申请日：2022-04-09
Inventor： Na ZHANG , Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Yang WANG
IPC: H04N19/105 , H04N19/176 , H04N19/88
Abstract: A method for video processing is proposed. The method comprises: constructing a merge candidate list for a target block of a video in a template matching (TM) merge mode: reordering the merge candidate list for the target block; and performing a conversion between the target block and a bitstream of the video based on the reordered merge candidate list. Compared with the conventional solution, the proposed method can advantageously improve the coding effectiveness and coding efficiency.
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公开(公告)号：US20240340429A1
公开(公告)日：2024-10-10
申请号：US18747256
申请日：2024-06-18
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Yang WANG
IPC: H04N19/139 , H04N19/147 , H04N19/176 , H04N19/513
CPC classification number: H04N19/139 , H04N19/147 , H04N19/176 , H04N19/513
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: determining, during a conversion between a target video block of a video and a bitstream of the video, a first motion vector candidate from a first direction of the target video block based on a motion vector refinement, the target video block being in a bi-prediction mode; and performing the conversion based at least in part on the first motion vector candidate.
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公开(公告)号：US20240333914A1
公开(公告)日：2024-10-03
申请号：US18737885
申请日：2024-06-07
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG
IPC: H04N19/105 , H04N19/176 , H04N19/70
CPC classification number: H04N19/105 , H04N19/176 , H04N19/70
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: obtaining, during a conversion between a target block of a video and a bitstream of the target block, a first syntax element for the target block that is indicated at a syntax level higher than a coding block level; determining whether a first coding tool is enabled or disabled based on the first syntax element; and performing the conversion based on the determining.
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