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    IMAGE CODING METHOD AND DEVICE USING TRANSFORM SKIP FLAG
    152.
    发明申请
    IMAGE CODING METHOD AND DEVICE USING TRANSFORM SKIP FLAG 审中-公开

    公开(公告)号：US20200260070A1

    公开(公告)日：2020-08-13

    申请号：US16852735

    申请日：2020-04-20

    Applicant: LG Electronics Inc.

    Inventor： Sunmi YOO ,  Jungah CHOI ,  Jangwon CHOI ,  Seunghwan KIM

    IPC: H04N19/103 ,  H04N19/176 ,  H04N19/61

    Abstract: A method for decoding an image according to the present document includes obtaining prediction mode information and residual related information from a bitstream, deriving prediction samples of a current block by performing prediction based on the prediction mode information, deriving residual samples of the current block based on the residual related information, and generating reconstruction samples of the current block based on the prediction samples and the residual samples, and the residual related information includes a transform skip flag based on a size of the current block and a maximum transform skip size, the transform skip flag represents whether a transform skip is applied to the current block, and information about the maximum transform skip size is obtained from the bitstream.

    METHOD AND DEVICE FOR CODING INTRA PREDICTION MODE
    154.
    发明申请
    METHOD AND DEVICE FOR CODING INTRA PREDICTION MODE 有权

    公开(公告)号：US20250063180A1

    公开(公告)日：2025-02-20

    申请号：US18724653

    申请日：2022-12-30

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi YOO ,  Hyeongmoon JANG ,  Junghak NAM ,  Jangwon CHOI ,  Seunghwan KIM

    IPC: H04N19/159 ,  H04N19/176 ,  H04N19/46 ,  H04N19/96

    Abstract: According to the present disclosure, an image decoding method performed by a decoding device includes the steps of acquiring image information including prediction-related information from a bitstream; deriving an intra prediction mode with respect to a current block on the basis of the prediction-related information; generating prediction samples with respect to the current block on the basis of the intra prediction mode with respect to the current block; and generating reconstruction samples with respect to the current block on the basis of the prediction samples with respect to the current block, wherein the intra prediction mode is derived on the basis of whether an upper neighboring block of the current block exists in the same coding tree unit (CTU) as the current block.

    METHOD AND APPARATUS FOR CODING INTRA PREDICTION MODE
    156.
    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.

    METHOD AND APPARATUS FOR DECODING IMAGE BY USING TRANSFORM ACCORDING TO BLOCK SIZE IN IMAGE CODING SYSTEM
    159.
    发明公开
    METHOD AND APPARATUS FOR DECODING IMAGE BY USING TRANSFORM ACCORDING TO BLOCK SIZE IN IMAGE CODING SYSTEM 审中-公开

    公开(公告)号：US20240283937A1

    公开(公告)日：2024-08-22

    申请号：US18590546

    申请日：2024-02-28

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi YOO ,  Jangwon CHOI ,  Jin HEO

    IPC: H04N19/132 ,  H04N19/122 ,  H04N19/176 ,  H04N19/61

    CPC classification number: H04N19/132 ,  H04N19/122 ,  H04N19/176 ,  H04N19/61

    Abstract: A method for decoding an image by a decoding apparatus according to the present invention comprises the steps of: deriving predicted samples by performing prediction on a current block; determining whether the current block is to be divided, on the basis of a size and a maximum transform size of the current block; when the current block is determined to be divided, dividing the current block into transform blocks; deriving transform coefficients of the transform blocks; deriving residual samples by performing an inverse transform procedure for the transform coefficients; and generating a reconstructed picture on the basis of the residual samples and the predicted samples, wherein, when the size of the current block is larger than the maximum transform size, the current block is determined to be divided.

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