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公开(公告)号：US20240259608A1
公开(公告)日：2024-08-01
申请号：US18633278
申请日：2024-04-11
Inventor： Mehdi SALEHIFAR , Yuwen HE , Kai ZHANG , Na ZHANG , Li ZHANG
IPC: H04N19/88 , H04N19/176
CPC classification number: H04N19/88 , H04N19/176
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing comprises: reordering, during a conversion between a current video block of a video and a bitstream of the video, a plurality of candidate signs of a motion vector difference (MVD) for a motion candidate of the current video block; and performing the conversion based on the reordered plurality of candidate signs. Compared with the conventional solution, the proposed method can advantageously improve coding efficiency and coding quality.
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公开(公告)号：US20240205417A1
公开(公告)日：2024-06-20
申请号：US18585005
申请日：2024-02-22
Inventor： Xueqing LI , Siping TAO , Li ZHANG , Yuwen HE
IPC: H04N19/154 , H04N19/109 , H04N19/119 , H04N19/132 , H04N19/139 , H04N19/167 , H04N19/176 , H04N19/463 , H04N19/52 , H04N19/82
CPC classification number: H04N19/154 , H04N19/109 , H04N19/119 , H04N19/132 , H04N19/139 , H04N19/167 , H04N19/176 , H04N19/463 , H04N19/52 , H04N19/82
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, whether an artifact coding tool is enabled, the artifact coding tool being used to generate an artifact effect in the video; in response to the artifact coding tool being enabled, determining at least one candidate coding tool from a plurality of coding tools; and performing the conversion by enabling the at least one candidate coding tool.
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公开(公告)号：US20250039430A1
公开(公告)日：2025-01-30
申请号：US18915045
申请日：2024-10-14
Inventor： Mehdi SALEHIFAR , Yuwen HE , Kai ZHANG , Na ZHANG , Li ZHANG
IPC: H04N19/513 , H04N19/176
Abstract: The present disclosure provides a solution for video processing. A method for video processing comprises: selecting, for a conversion between a current video block of a video and a bitstream of the video, a target scheme from a plurality of candidate schemes for adjusting a merge candidate for the current video block; and performing the conversion based on the target scheme, wherein the plurality of candidate schemes comprise at least one of a first set of candidate schemes and a second set of candidate schemes, in each of the first set of candidate schemes, a first motion vector (MV) of the merge candidate is adjusted with a first motion vector difference (MVD), and a second MV of the merge candidate is kept unadjusted, in each of the second set of candidate schemes, the second MV is adjusted with a second MVD, and the first MV is kept unadjusted.
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公开(公告)号：US20240323390A1
公开(公告)日：2024-09-26
申请号：US18658743
申请日：2024-05-08
IPC: H04N19/139 , H04N19/132 , H04N19/176 , H04N19/184 , H04N19/52
CPC classification number: H04N19/139 , H04N19/132 , H04N19/176 , H04N19/184 , H04N19/52
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: deriving, during a conversion between a target block of a video and a bitstream of the target block, a sample-based optical flow with an affine motion model for each sub-block associated with the target block; and performing the conversion based on the sample-based optical flow.
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公开(公告)号：US20240364911A1
公开(公告)日：2024-10-31
申请号：US18763405
申请日：2024-07-03
Inventor： Mehdi SALEHIFAR , Yuwen HE , Kai ZHANG , Na ZHANG , Li ZHANG
IPC: H04N19/46 , H04N19/13 , H04N19/176
CPC classification number: H04N19/46 , H04N19/13 , H04N19/176
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: performing a conversion between a current video block of a video and a bitstream of the video based on at least one flag of: a first flag indicating whether a merge mode with motion vector difference (MMVD) is used for the current video block, or a second flag indicating whether an affine MMVD is used for the current video block, wherein the at least one flag is bypass coded or is coded with at least one context determined from a plurality of contexts. Thereby, the proposed method can advantageously improve coding efficiency and coding quality.
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Patent Agency Ranking
公开(公告)号：US20240314349A1
公开(公告)日：2024-09-19
申请号：US18671886
申请日：2024-05-22
Inventor： Zhipin DENG , Li ZHANG , Kai ZHANG , Yuwen HE
IPC: H04N19/52 , H04N19/139 , H04N19/157 , H04N19/176 , H04N19/44 , H04N19/70
CPC classification number: H04N19/52 , H04N19/139 , H04N19/157 , H04N19/176 , H04N19/44 , H04N19/70
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: applying, during a conversion between a target block of a video and a bitstream of the target block, a process of at least one of: a decoder side motion vector refinement (DMVR) or a DMVR variant to the target block that is coded with a target mode; and performing the conversion based on the process of at least one of: the DMVR or the DMVR variant.
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公开(公告)号：US20240275979A1
公开(公告)日：2024-08-15
申请号：US18567324
申请日：2022-06-08
IPC: H04N19/137 , H04N19/176 , H04N19/182 , H04N19/70
CPC classification number: H04N19/137 , H04N19/176 , H04N19/182 , H04N19/70
Abstract: Embodiments of the present disclosure provide a solution for video processing is proposed. A method for video processing is proposed. The method comprises: determining, during a conversion between a video unit and a bitstream of the video unit, information on applying an optical flow based coding method to the video unit based on illuminance information of the video unit; and performing the conversion based on the information. Compared with the conventional solution, the proposed method can advantageously improve the coding efficiency and performance.
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公开(公告)号：US20240146949A1
公开(公告)日：2024-05-02
申请号：US18280000
申请日：2022-03-02
Inventor： Xueqing LI , Li ZHANG , Yuwen HE
IPC: H04N19/513 , H04N19/139 , H04N19/467
CPC classification number: H04N19/513 , H04N19/139 , H04N19/467
Abstract: A method, device, and storage/recording medium for image encoding, including: obtaining first coding information for a first coding unit, in a first image, indicating a scheme for encoding the first coding unit into a first bitstream of the first image; determining, based on a relative position relationship between a target region in a second image obtained from the first image and a second coding unit in the second image, a reuse mode for the second coding unit regarding the first coding information, the second coding unit corresponding to the first coding unit, the target region indicating a region in the second image different from the first image; determining second coding information for the second coding unit based on the reuse mode; and generating a second bitstream for the second image based on the second coding information. Thereby, reducing computational complexity of transcoding and avoiding degradation of coding performance/quality.
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公开(公告)号：US20220329816A1
公开(公告)日：2022-10-13
申请号：US17848535
申请日：2022-06-24
Inventor： Hongbin LIU , Li ZHANG , Kai ZHANG , Jizheng XU , Yuwen HE , Yue WANG
IPC: H04N19/132 , H04N19/105 , H04N19/186 , H04N19/176
Abstract: A method of video processing includes performing a conversion between a current video block of a second color component of a video and a bitstream of the video using a cross-component prediction with multiple-parameter model (CCPMPM) in which samples of the current video block are predictively coded in the bitstream using a linear combination of samples of a first color component multiplied by linear coefficients and/or one or more offsets. The bitstream conforms to a format rule. The linear coefficients of the CCPMPM are determined using a first rule. The samples of the first color component are determined using a second rule.
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公开(公告)号：US20240314346A1
公开(公告)日：2024-09-19
申请号：US18671747
申请日：2024-05-22
Inventor： Zhipin DENG , Kai ZHANG , Li ZHANG , Yuwen HE
IPC: H04N19/513 , H04N19/176
CPC classification number: H04N19/513 , H04N19/176
Abstract: Embodiments of the present disclosure provide a solution for video processing. A method for video processing is proposed. The method comprises: refining, during a conversion between a target block of a video and a bitstream of the target block, a bi-motion vector predictor (MVP) of the target block by applying a decoder side motion vector derivation process, and wherein the target block is coded with an advanced motion vector prediction (AMVP) mode; and performing the conversion based on the refined bi-MVP.
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