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    Syntax design method and apparatus for performing coding by using syntax
    4.
    发明授权
    Syntax design method and apparatus for performing coding by using syntax 有权

    公开(公告)号：US11575942B2

    公开(公告)日：2023-02-07

    申请号：US17521726

    申请日：2021-11-08

    申请人： LG ELECTRONICS INC.

    发明人： Hyeongmoon Jang ,  Junghak Nam ,  Jaehyun Lim

    IPC分类号： H04N19/70 ,  H04N19/176 ,  H04N19/52

    摘要： An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: decoding, on the basis of a bitstream, an affine flag that indicates whether affine prediction is applicable to a current block and a sub-block TMVP flag that indicates whether a temporal motion vector predictor based on a sub-block of the current block is usable; determining whether to decode a predetermined merge mode flag that indicates whether to apply a predetermined merge mode to the current block, on the basis of the decoded affine flag and the decoded sub-block TMVP flag; deriving prediction samples of the current block on the basis of the determining of whether to decode the predetermined merge mode flag; and generating reconstructed samples of the current block based on the prediction samples of the current block.

    METHOD AND DEVICE FOR SIGNALING INFORMATION ON CHROMA FORMAT
    7.
    发明申请
    METHOD AND DEVICE FOR SIGNALING INFORMATION ON CHROMA FORMAT 有权

    公开(公告)号：US20220368919A1

    公开(公告)日：2022-11-17

    申请号：US17871562

    申请日：2022-07-22

    申请人： LG ELECTRONICS INC.

    发明人： Ling LI ,  Jaehyun Lim ,  Jin Heo ,  Junghak Nam

    IPC分类号： H04N19/132 ,  H04N19/117 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/46 ,  H04N19/82 ,  H04N19/96

    摘要： An image decoding method performed by a decoding device according to the present disclosure comprises the steps of: receiving a bitstream including prediction information for a current block; deriving a chroma array type for the current block on the basis of a separate color plane flag indicating whether three color components are separately coded and a chroma format index indicating a chroma format sampling structure for the current block, which are included in the prediction information for the current block; deriving prediction samples for the current block on the basis of the derived chroma array type; and deriving reconstructed samples for the current block on the basis of the prediction samples.

    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING
    10.
    发明申请
    IMAGE CODING METHOD AND DEVICE USING DEBLOCKING FILTERING 有权

    公开(公告)号：US20220191552A1

    公开(公告)日：2022-06-16

    申请号：US17688533

    申请日：2022-03-07

    申请人： LG ELECTRONICS INC.

    发明人： Hyeongmoon Jang ,  Junghak Nam

    IPC分类号： H04N19/82 ,  H04N19/117 ,  H04N19/176 ,  H04N19/85

    摘要： A method by which a decoding device decodes an image, according to the present document, comprises the steps of: generating a restoration picture on the basis of prediction samples of a coding block; deriving a boundary strength (BS) for a boundary of the coding block in the restoration picture; performing deblocking filtering on the boundary of the coding block on the basis of the boundary strength; and deriving a modified restoration picture for the restoration picture on the basis of the deblocking filtering, wherein the boundary strength is derived on the basis of a prediction mode of a first block and a second block that are adjacent to the boundary of the coding block, and the prediction mode of the first block or the second block is derived on the basis of whether the prediction mode of the first block or the second block is a current picture referencing (CPR) mode to be coded in reference to a current picture.