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    IMAGE DECODING METHOD USING BDPCM AND DEVICE THEREFOR
    51.
    发明公开
    IMAGE DECODING METHOD USING BDPCM AND DEVICE THEREFOR 审中-公开

    公开(公告)号：US20240089470A1

    公开(公告)日：2024-03-14

    申请号：US18517527

    申请日：2023-11-22

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

    IPC: H04N19/176 ,  H04N19/132 ,  H04N19/159 ,  H04N19/593 ,  H04N19/70

    CPC classification number: H04N19/176 ,  H04N19/132 ,  H04N19/159 ,  H04N19/593 ,  H04N19/70

    Abstract: An image decoding method performed by a decoding apparatus according to the present document comprises the steps of: deriving prediction samples for a first sample and a second sample of the current block on the basis of BDPCM-related information about the current block and neighboring samples of the current block; deriving residual samples for the first sample and the second sample on the basis of a residual coefficient of the first sample and a modified residual coefficient of the second sample; and storing, as the intra prediction mode of the current block, the intra prediction mode in the prediction direction of the current block, which is derived on the basis of a BDPCM direction flag.

    METHOD AND DEVICE FOR IMAGE CODING USING MOTION VECTOR DIFFERENCES
    58.
    发明申请
    METHOD AND DEVICE FOR IMAGE CODING USING MOTION VECTOR DIFFERENCES 有权

    公开(公告)号：US20230082083A1

    公开(公告)日：2023-03-16

    申请号：US17977306

    申请日：2022-10-31

    Applicant: LG ELECTRONICS INC.

    Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

    IPC: H04N19/139 ,  H04N19/105 ,  H04N19/109 ,  H04N19/176 ,  H04N19/52

    Abstract: According to embodiments of the present document, a prediction procedure may be performed for image/video coding, and the prediction procedure may include symmetric motion vector differences (SMVDs) and merge mode motion vector differences (MMVDs) according to an inter prediction. The inter prediction may be performed on the basis of reference pictures of a current picture, and types (e.g., a long term reference picture, a short term reference picture, etc.) of the reference pictures may be considered for the inter prediction. Therefore, performance and coding efficiency in the prediction procedure can be improved.

    VIDEO CODING METHOD ON BASIS OF SECONDARY TRANSFORM, AND DEVICE THEREFOR
    59.
    发明申请
    VIDEO CODING METHOD ON BASIS OF SECONDARY TRANSFORM, AND DEVICE THEREFOR 有权

    公开(公告)号：US20230053262A1

    公开(公告)日：2023-02-16

    申请号：US17962077

    申请日：2022-10-07

    Applicant: LG Electronics Inc.

    Inventor： Moonmo KOO ,  Jaehyun LIM ,  Junghak NAM ,  Seunghwan KIM ,  Mehdi SALEHIFAR

    IPC: H04N19/61 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

    Abstract: A video transform method includes: receiving a quantized transform coefficient for a target block and a transform index for a non-separated secondary transform; inverse-quantizing the quantized transform coefficient; deriving an input transform coefficient size indicating the length of the inverse-quantized transform coefficient to which the non-separated secondary transform has been applied, an output transform coefficient size indicating the length of a modified transform coefficient to which the non-separated secondary transform has been applied, and a transform set mapped to the intra mode of the target block, when the transform index does not indicate that the non-separated secondary transform is not performed; and deriving the modified transform coefficient on the basis of a matrix operation on a transform kernel matrix in the transform set indicated by the transform index, and a transform coefficient list corresponding to the input transform coefficient size.

    APPARATUS FOR PERFORMING IMAGE CODING ON BASIS OF ATMVP CANDIDATE
    60.
    发明申请
    APPARATUS FOR PERFORMING IMAGE CODING ON BASIS OF ATMVP CANDIDATE 有权

    公开(公告)号：US20220394290A1

    公开(公告)日：2022-12-08

    申请号：US17887911

    申请日：2022-08-15

    Applicant: LG Electronics Inc.

    Inventor： Hyeongmoon JANG ,  Junghak NAM ,  Jaehyun LIM

    IPC: H04N19/52 ,  H04N19/132 ,  H04N19/176 ,  H04N19/31

    Abstract: A method for image decoding performed by a decoding apparatus according to the present disclosure comprises the steps of: deriving an ATMVP candidate for a current block; deriving merge candidates for the current block; deriving prediction samples for the current block on the basis of the merge candidates and the ATMVP candidate; and deriving reconstruction samples for the current block on the basis of the prediction samples, wherein the ATMVP candidate is a spatial neighboring block spatially adjacent to the current block.

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