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    AFFINE MERGE MODE WITH TRANSLATIONAL MOTION VECTORS
    53.
    发明公开
    AFFINE MERGE MODE WITH TRANSLATIONAL MOTION VECTORS 审中-公开

    公开(公告)号：US20230412794A1

    公开(公告)日：2023-12-21

    申请号：US17982938

    申请日：2022-11-08

    Applicant: Tencent America LLC

    Inventor： Guichun LI ,  Han GAO ,  Lien-Fei CHEN ,  Xin ZHAO ,  Shan LIU

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/88 ,  H04N19/176 ,  H04N19/46

    CPC classification number: H04N19/105 ,  H04N19/132 ,  H04N19/137 ,  H04N19/88 ,  H04N19/176 ,  H04N19/46

    Abstract: In some examples, an apparatus for video decoding includes processing circuitry. The processing circuitry determines, from a candidate list, a first affine-translational merge candidate for a prediction of a current block in a current picture. The first affine-translational merge candidate provides affine motion information associated with a first reference picture in a first reference list and translational motion information associated with a second reference picture in a second reference list. The processing circuitry generates a first prediction for a sample in the current block according to the affine motion information associated with the first reference picture, and generates a second prediction for the sample in the current block according to the translational motion information associated with the second reference picture. The processing circuitry reconstructs the sample of the current block according to a combination of the first prediction and the second prediction.

    NON-LINEAR MAPPING BASED FILTER USE IN LOOP FILTER CHAIN
    54.
    发明公开
    NON-LINEAR MAPPING BASED FILTER USE IN LOOP FILTER CHAIN 审中-公开

    公开(公告)号：US20230353792A1

    公开(公告)日：2023-11-02

    申请号：US18328480

    申请日：2023-06-02

    Applicant: Tencent America LLC

    Inventor： Yixin DU ,  Xin ZHAO ,  Shan LIU

    IPC: H04N19/186 ,  H04N19/82 ,  H04N19/86

    CPC classification number: H04N19/82 ,  H04N19/186 ,  H04N19/86

    Abstract: A method for filtering includes determining, by a processor, a first offset value by applying a non linear mapping based filter to first reconstructed samples at a first node along a loop filter chain that includes a plurality of video filters. The method further includes applying, by the processor, the first offset value to an intermediate reconstructed sample at a second node along the loop filter chain to generate a second reconstructed sample, wherein the second node is one of an input node of the loop filter chain or an output node of the loop filter chain.

    METHODS, DEVICES, AND STORAGE MEDIUM FOR MULTI-SYMBOL ARITHMETIC CODING
    56.
    发明公开
    METHODS, DEVICES, AND STORAGE MEDIUM FOR MULTI-SYMBOL ARITHMETIC CODING 审中-公开

    公开(公告)号：US20230247206A1

    公开(公告)日：2023-08-03

    申请号：US17869964

    申请日：2022-07-21

    Applicant: Tencent America LLC

    Inventor： Madhu PERINGASSERY KRISHNAN ,  Xin ZHAO ,  Shan LIU

    IPC: H04N19/149 ,  H04N19/172 ,  H04N19/46 ,  H04N19/70

    CPC classification number: H04N19/149 ,  H04N19/172 ,  H04N19/46 ,  H04N19/70

    Abstract: Methods, apparatus, and computer readable storage medium for multi-symbol arithmetic coding in video decoding. The method includes receiving a coded video bitstream; obtaining an array of cumulative distribution functions and corresponding M symbols, wherein M is an integer larger than 1; and performing, based on the array of cumulative distribution functions, arithmetic decoding on the coded video bitstream to extract at least one symbol by: for each extracted symbol, updating the array of cumulative distribution functions according to the extracted symbol based on at least one probability update rate, and continuing, based on the updated array of cumulative distribution functions, arithmetic decoding on the coded video bitstream to extract next symbol.

    JOINT SIGNALING METHOD FOR MOTION VECTOR DIFFERENCE
    59.
    发明公开
    JOINT SIGNALING METHOD FOR MOTION VECTOR DIFFERENCE 审中-公开

    公开(公告)号：US20230156182A1

    公开(公告)日：2023-05-18

    申请号：US17700729

    申请日：2022-03-22

    Applicant: Tencent America LLC

    Inventor： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

    IPC: H04N19/105 ,  H04N19/139 ,  H04N19/513 ,  H04N19/176 ,  H04N19/70

    CPC classification number: H04N19/105 ,  H04N19/139 ,  H04N19/521 ,  H04N19/176 ,  H04N19/70

    Abstract: This disclosure relates encoding and decoding of motion vector difference for inter-predicting a video block. The method includes receiving a coded video bitstream; extracting, from the coded video bitstream, a flag indicating whether an inter-predication mode is a JOINT_NEWMV mode for a current block in a current frame, wherein the JOINT_NEWMV mode indicates that a first delta motion vector (MV) for a first reference frame from a reference list 0 and a second delta MV for a second reference frame from a reference list 1 are jointly signaled; in response to the flag indicating that the inter-predication mode is the JOINT_NEWMV mode: extracting a joint delta motion vector (MV) for the current block, and deriving the first delta MV and the second delta MV based on the joint delta MV; and decoding the current block based on the first delta MV and the second delta MV.

    PRIMARY TRANSFORMS FOR CROSS-COMPONENT LEVEL RECONSTRUCTION
    60.
    发明公开
    PRIMARY TRANSFORMS FOR CROSS-COMPONENT LEVEL RECONSTRUCTION 审中-公开

    公开(公告)号：US20230143151A1

    公开(公告)日：2023-05-11

    申请号：US17966390

    申请日：2022-10-14

    Applicant: Tencent America LLC

    Inventor： Madhu PERINGASSERY KRISHNAN ,  Xin ZHAO ,  Shan LIU

    IPC: H04N19/12 ,  H04N19/186 ,  H04N19/18 ,  H04N19/176 ,  H04N19/46

    CPC classification number: H04N19/12 ,  H04N19/18 ,  H04N19/46 ,  H04N19/176 ,  H04N19/186

    Abstract: This disclosure relates generally to video coding and particularly to cross component level reconstruction. For example, a method is disclosed for processing video data which may include extracting a first transform block of a first color component and a second transform block of a second color component from a bitstream of a video block; determining that transform coefficients in the first transform block are all zero; determining that a CCLR is applied to the first transform block; refining one or more of the transform coefficients in the first transform block, to obtain a refined first transform block; determining a target transform kernel for the refined first transform block; performing a reverse transform on the refined first transform block based on the target transform kernel to obtain a target block; and reconstructing the first color component of the video block based on at least the target block.

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