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    Method for coding image/video on basis of intra prediction and device therefor
    32.
    发明授权
    Method for coding image/video on basis of intra prediction and device therefor 有权

    公开(公告)号：US11317086B2

    公开(公告)日：2022-04-26

    申请号：US16981526

    申请日：2019-03-15

    申请人： LG Electronics Inc.

    发明人： Jin Heo ,  Sunmi Yoo ,  Ling Li ,  Jangwon Choi

    IPC分类号： H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    摘要： An image decoding method according to the present disclosure comprises the steps of: obtaining intra prediction type related information for a current block from a bit stream; deriving the intra prediction type of the current block based on the intra prediction type-related information; obtaining intra prediction mode-related information for the current block from the bitstream; configuring a most probable mode (MPM) list including candidate intra prediction modes for the current block based on neighboring blocks of the current block; deriving the intra prediction mode of the current block based on the MPM list and the intra prediction mode-related information; and generating a predicted block of the current block based on the intra prediction type and the intra prediction mode, wherein when the intra prediction type indicates the particular intra prediction type, the MPM index is parsed from the bit stream without parsing of an MPM flag.

    METHOD AND DEVICE FOR CODING TRANSFORM COEFFICIENT
    33.
    发明申请
    METHOD AND DEVICE FOR CODING TRANSFORM COEFFICIENT 有权

    公开(公告)号：US20210400274A1

    公开(公告)日：2021-12-23

    申请号：US17281893

    申请日：2019-10-04

    申请人： LG ELECTRONICS INC.

    发明人： Sunmi Yoo ,  Jungah Choi ,  Seunghwan Kim ,  Jangwon Choi ,  Jin Heo

    IPC分类号： H04N19/124 ,  H04N19/18 ,  H04N19/70 ,  H04N19/184 ,  H04N19/176 ,  H04N19/132

    摘要： An image decoding method according to the present document comprises the steps of: receiving a bitstream including residual information; deriving a quantized transform coefficient for a current block on the basis of the residual information included in the bitstream; deriving a residual sample for the current block on the basis of the quantized transform coefficient; and generating a reconstructed picture on the basis of the residual sample for the current block, wherein the residual information may be derived via different syntax elements depending on whether a transform has been applied to the current block.

    Image decoding method and apparatus relying on intra prediction in image coding system
    36.
    发明授权
    Image decoding method and apparatus relying on intra prediction in image coding system 有权

    公开(公告)号：US10924762B2

    公开(公告)日：2021-02-16

    申请号：US16822508

    申请日：2020-03-18

    申请人： LG ELECTRONICS INC.

    发明人： Jin Heo

    IPC分类号： H04N19/593 ,  H04N19/176 ,  H04N19/132 ,  H04N19/59

    摘要： An image decoding method performed by a decoding apparatus according to the present invention comprises: a step of deriving an intra prediction mode for a current block; a step of deriving upper neighboring samples of a plurality of rows for the current block, and left neighboring samples of a plurality of columns; a step of deriving one row of upper reference samples on the basis of the upper neighboring samples; a step of deriving one column of left reference samples on the basis of the left neighboring samples; and a step of generating a prediction sample for the current block by using at least one of the upper reference samples and the left reference samples in accordance with the intra prediction mode.

    Intra-prediction method and apparatus in video coding system
    38.
    发明授权
    Intra-prediction method and apparatus in video coding system 有权

    公开(公告)号：US10750167B2

    公开(公告)日：2020-08-18

    申请号：US15768992

    申请日：2016-09-27

    申请人： LG ELECTRONICS INC.

    发明人： Eunyong Son ,  Jin Heo ,  Seungwook Park ,  Sehoon Yea

    IPC分类号： H04N19/105 ,  H04N19/11 ,  H04N19/593 ,  H04N19/159 ,  H04N19/176 ,  H04N19/52 ,  H04N19/196

    摘要： An image decoding method, which is performed by a decoding device according to the present invention, comprises the steps of: acquiring the information on an intra-prediction mode of a current block from a received bit stream; deriving neighboring reference samples of the current block; deriving a first prediction value for a current sample of the current block on the basis of the intra-prediction mode and the neighboring reference samples; deriving a second prediction value for the current sample on the basis of adjacent samples of the current sample; and deriving a prediction value for the current sample on the basis of the first prediction value and the second prediction value. According to the present invention, the intra-prediction value can be derived on the basis of the adjacent samples of the current sample within the present block, and the intra-prediction accuracy can be improved therethrough.

    RESIDUAL CODING METHOD AND DEVICE FOR SAME
    39.
    发明申请
    RESIDUAL CODING METHOD AND DEVICE FOR SAME 审中-公开

    公开(公告)号：US20200260080A1

    公开(公告)日：2020-08-13

    申请号：US16856898

    申请日：2020-04-23

    申请人： LG ELECTRONICS INC.

    发明人： Jungah CHOI ,  Sunmi Yoo ,  Jin Heo ,  Seunghwan Kim ,  Jangwon Choi

    IPC分类号： H04N19/122 ,  H04N19/196 ,  H04N19/176 ,  H04N19/136

    摘要： A method for decoding a picture performed by a decoding apparatus according to the present disclosure includes receiving a bitstream including residual information, deriving a quantized transform coefficient for a current block based on the residual information included in the bitstream, deriving a transform coefficient from the quantized transform coefficient based on a dequantization process, deriving a residual sample for the current block by applying an inverse transform to the derived transform coefficient, and generating a reconstructed picture based on the residual sample for the current block.