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公开(公告)号：US20220166971A1
公开(公告)日：2022-05-26
申请号：US17665242
申请日：2022-02-04
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/105 , H04N19/132 , H04N19/176 , H04N19/70
Abstract: A method of video processing includes determining, for a conversion between a current block of a first picture of a video and a bitstream representation of the video, a motion candidate based on motion information from a second picture according to a rule. The rule specifies that a position from which the motion information is accessed is constrained to be within a specific subpicture of the second picture. The method also includes performing the conversion based on the determining.
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公开(公告)号：US20220159246A1
公开(公告)日：2022-05-19
申请号：US17665220
申请日：2022-02-04
Inventor： Kai ZHANG , Zhipin DENG , Hongbin LIU , Li ZHANG , Jizheng XU
IPC: H04N19/105 , H04N19/132 , H04N19/186 , H04N19/176 , H04N19/70
Abstract: A method of video processing includes performing a conversion between a video comprising a picture that includes multiple sub-pictures and a coded representation of the video using a coding mode according to a rule. The rule specifies that certain stored information about a previous sub-picture is reset prior to processing each next sub-picture of the multiple sub-pictures.
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公开(公告)号：US20220109885A1
公开(公告)日：2022-04-07
申请号：US17546621
申请日：2021-12-09
Inventor： Zhipin DENG , Li ZHANG , Hongbin LIU , Kai ZHANG , Jizheng XU
IPC: H04N19/70 , H04N19/186 , H04N19/176
Abstract: A method for visual media processing includes processing a bitstream representation for a conversion between a current video block in a video region of a visual media data and the bitstream representation. The bitstream representation is based on a rule that specifies that one or more syntax elements used in a luma-dependent chroma residual scaling step are selectively included in the bitstream representation. The luma-dependent chroma residual scaling step includes scaling chroma samples based on neighboring reconstructed luma samples during the conversion. The one or more syntax elements are usable to derive a chroma residual scaling factor used for the scaling.
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公开(公告)号：US20220094930A1
公开(公告)日：2022-03-24
申请号：US17457473
申请日：2021-12-03
Inventor： Kai ZHANG , Li ZHANG , Hongbin LIU , Zhipin DENG , Yang WANG , Yue WANG
IPC: H04N19/122 , H04N19/176 , H04N19/18 , H04N19/625
Abstract: Devices, systems and methods for digital video coding, which includes using multiple transforms, are described. In a representative aspect, a method for video processing includes selecting, as part of a multiple transform selection (MTS) process, a common transform as both a vertical transform and a horizontal transform, and applying, as part of performing a conversion between a current block of a video and a bitstream representation of the video, the vertical transform and the horizontal transform to the current block.
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Patent Agency Ranking
公开(公告)号：US20220060745A1
公开(公告)日：2022-02-24
申请号：US17453135
申请日：2021-11-01
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/59 , H04N19/176 , H04N19/159 , H04N19/186 , H04N19/40 , H04N19/105 , H04N19/132 , 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 performing a first determination whether a luma video block of a video is coded using a matrix based intra prediction (MIP) mode; performing a second determination that the luma video block is applicable for determining a chroma intra mode for a current chroma video block of the video; performing, based on the first determination and the second determination, a third determination about the chroma intra mode to be used for the current chroma video block; and performing, based on the third determination, a conversion between the current chroma video block and a bitstream representation of the current chroma video block.
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公开(公告)号：US20220014783A1
公开(公告)日：2022-01-13
申请号：US17478511
申请日：2021-09-17
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/593 , H04N19/176 , H04N19/117 , H04N19/105 , H04N19/132 , H04N19/184
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 reference boundary samples located to a left of the current video block and located to a top of the current video block, a boundary downsampling operation, followed by a matrix vector multiplication operation, and selectively followed by an upsampling operation, where instead of reduced boundary samples calculated from the reference boundary samples of the current video block in the boundary downsampling operation, the reference boundary samples are directly used for a prediction process in the upsampling operation.
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公开(公告)号：US20210321090A1
公开(公告)日：2021-10-14
申请号：US17342951
申请日：2021-06-09
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/105 , H04N19/132 , H04N19/159 , H04N19/70 , 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 generating, for a conversion between a current video block of a video and a coded representation of the current video block, a most probable mode (MPM) list based on a rule, where the rule is based on whether a neighboring video block of the current video block is coded with a matrix based intra prediction (MUP) mode, and performing the conversion between the current video block and the coded representation of the current video block using the MPM list, where the conversion applies a non-MIP mode to the current video block, and where the non-MUP mode is different from the MIP mode.
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公开(公告)号：US20210297661A1
公开(公告)日：2021-09-23
申请号：US17343041
申请日：2021-06-09
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Hongbin LIU , Jizheng XU
IPC: H04N19/105 , H04N19/132 , H04N19/117 , H04N19/82 , H04N19/159 , H04N19/70 , 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 determining, for encoding a current video block of a video into a bitstream representation of the current video block, a type of neighboring samples of the current video block to be used according to a rule, and adding, based on the determining, an encoded representation of the current video block to the bitstream representation, where the current video block is encoded 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.
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公开(公告)号：US20250142106A1
公开(公告)日：2025-05-01
申请号：US19004040
申请日：2024-12-27
Applicant: Douyin Vision (Beijing) Co., Ltd. , Bytedance Inc.
Inventor： Yang WANG , Kai ZHANG , Zhipin DENG , Li ZHANG
IPC: H04N19/51 , H04N19/132 , H04N19/137
Abstract: Embodiments of the disclosure provide a solution for video processing. A method for video processing is proposed. The method includes: applying, for a conversion between a video unit of a video and a bitstream of the video unit, a wrap around motion compensation (WAMC) during a derivation of motion information for the video unit; and performing the conversion based on the derived motion information.
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