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    DMVR-BASED INTER PREDICTION METHOD AND APPARATUS
    1.
    发明申请
    DMVR-BASED INTER PREDICTION METHOD AND APPARATUS 有权

    公开(公告)号：US20250088638A1

    公开(公告)日：2025-03-13

    申请号：US18956744

    申请日：2024-11-22

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46

    Abstract: A video decoding method comprises: deriving L0 and L1 motion vectors of a current block; deriving decoder-side motion vector refinement (DMVR) flag information indicating whether to apply a DMVR to the current block; when the DMVR flag information indicates that the DMVR is to be applied to the current block, deriving refined L0 and L1 motion vectors based on the L0 and L1 motion vectors by applying the DMVR to the current block; deriving prediction samples of the current block based on the refined L0 and L1 motion vectors; and generating reconstructed samples of the current block based on the predicted samples, wherein deriving DMVR flag information comprises deriving the DMVR flag information by applying the DMVR to the current block when the height of the current block is 8 or more, and when the values of L0 and L1 luma weighted prediction flag information are both 0.

    METHOD AND APPARATUS FOR CODING INTRA PREDICTION MODE
    3.
    发明申请
    METHOD AND APPARATUS FOR CODING INTRA PREDICTION MODE 有权

    公开(公告)号：US20240414328A1

    公开(公告)日：2024-12-12

    申请号：US18702283

    申请日：2022-10-21

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi YOO ,  Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG ,  Jangwon CHOI

    IPC: H04N19/11 ,  H04N19/105 ,  H04N19/176

    Abstract: According to the present disclosure, an image decoding method performed by a decoding apparatus comprises the steps of: receiving a bitstream including prediction-related information; configuring a list of MPMs including intra prediction mode candidates for a current block; decoding remaining mode information related to remaining intra prediction modes other than the intra prediction mode candidates included in the list of MPMs; deriving an intra prediction mode of the current block on the basis of the remaining mode information; generating prediction samples for the current block on the basis of the intra prediction mode of the current block; and generating reconstructed samples for the current block on the basis of the prediction samples for the current block, wherein on the basis that DIMD mode or TIMD for the current block can be derived, a plurality of intra prediction modes are derived on the basis of the remaining mode information.

    DMVR-BASED INTER-PREDICTION METHOD AND DEVICE
    4.
    发明公开
    DMVR-BASED INTER-PREDICTION METHOD AND DEVICE 审中-公开

    公开(公告)号：US20240187603A1

    公开(公告)日：2024-06-06

    申请号：US18414190

    申请日：2024-01-16

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: deriving a motion vector for a current block; determining whether to apply refinement to the motion vector for the current block; deriving a refined motion vector by applying decoder-side motion vector refinement (DMVR) to the motion vector if it is determined to apply refinement to the motion vector for the current block; deriving prediction samples for the current block on the basis of the refined motion vector; and generating reconstruction samples for the current block on the basis of the prediction samples, wherein the step of determining whether to apply refinement includes determining whether to apply the refinement on the basis of at least one of the size of the current block and bi-prediction weight index information for the current block.

    INTER PREDICTION-BASED IMAGE CODING METHOD AND DEVICE
    7.
    发明申请
    INTER PREDICTION-BASED IMAGE CODING METHOD AND DEVICE 有权

    公开(公告)号：US20220417502A1

    公开(公告)日：2022-12-29

    申请号：US17891679

    申请日：2022-08-19

    Applicant: LG ELECTRONICS INC.

    Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

    IPC: H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

    Abstract: An image decoding method according to the present document may comprise: a step for deriving an inter prediction mode from encoded information; a step for constructing reference pictures lists; a step for deriving motion information including reference picture indices for symmetric motion vector differences (SMVD) on the basis of reference pictures included in the reference picture lists; and a step for generating prediction samples on the basis of the motion information. The reference picture indices for SMVD may be derived on the basis of short-term reference pictures included in the reference picture lists.

    INTER-PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM
    10.
    发明申请
    INTER-PREDICTION METHOD AND APPARATUS IN IMAGE CODING SYSTEM 有权

    公开(公告)号：US20220329825A1

    公开(公告)日：2022-10-13

    申请号：US17843531

    申请日：2022-06-17

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM ,  Jaehyun LIM ,  Seunghwan KIM ,  Jungdong SEO ,  Jaeho LEE ,  Hyeongmoon JANG

    IPC: H04N19/139 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/503

    Abstract: An image decoding method performed by a decoding apparatus includes the operations of: deriving a correspondence block corresponding to the current block of the current picture, the correspondence block being located in a co-located picture; deriving a movement vector of the correspondence block; scaling the movement vector of the correspondence block based on a first temporal distance and second temporal distance, the first temporal distance being the difference between the POC values of the co-located picture and POC values of the reference picture of the correspondence block, and the second temporal distance being the difference between the POC values of the co-located picture and POC values of the current picture containing the current block; deriving the movement vector updated based on the scaled movement vector and location of the current block; and deriving a movement vector of the current block based on the updated movement vector.

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