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    CCLM-BASED INTRA-PREDICTION METHOD AND APPARATUS THEREFOR
    112.
    发明申请
    CCLM-BASED INTRA-PREDICTION METHOD AND APPARATUS THEREFOR 有权

    公开(公告)号：US20220038683A1

    公开(公告)日：2022-02-03

    申请号：US17278473

    申请日：2019-06-24

    Applicant: LG ELECTRONICS INC.

    Inventor： Jangwon CHOI ,  Jin HEO ,  Sunmi YOO ,  Ling LI

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

    Abstract: A picture decoding method, performed by a decoding apparatus according to the present disclosure, comprises the steps of: when an intra-prediction mode of a chroma block is a cross-component linear model (CCLM) mode, deriving neighboring chroma reference samples with respect to the chroma block; deriving neighboring luma reference samples of a luma block corresponding to the chroma block and luma samples in the luma block; deriving down-sampled neighboring luma reference samples and downsampled luma samples by down sampling the neighboring luma reference samples and the luma samples, respectively; deriving a linear model parameter on the basis of the down-sampled neighboring luma reference samples and the neighboring chroma reference samples; generating prediction samples with respect to the chroma block on the basis of the linear model parameter and the down-sampled luma samples of the luma block; and reconstructing the chroma block on the basis of the prediction samples with respect to the chroma block.

    IMAGE PREDICTION METHOD AND APPARATUS PERFORMING INTRA PREDICTION
    114.
    发明申请
    IMAGE PREDICTION METHOD AND APPARATUS PERFORMING INTRA PREDICTION 有权

    公开(公告)号：US20210360226A1

    公开(公告)日：2021-11-18

    申请号：US17276786

    申请日：2019-09-19

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi YOO ,  Jin HEO

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/117 ,  H04N19/82 ,  H04N19/176

    Abstract: An image decoding method according to the present document comprises the steps of: generating a prediction sample for the current block on the basis of an intra prediction mode for the current block and neighboring reference samples; and generating a reconstructed picture for the current block on the basis of the prediction sample, wherein, when the reference sample position indicated by a prediction direction of a directional prediction mode of the current block from the position of the prediction sample is the fractional sample position, the prediction sample is derived from among the neighboring reference samples by interpolating with respect to specific neighboring reference samples located around the fractional sample position, when the specific neighboring reference samples include outer neighboring reference samples located at (2*nW+1, −1) and (2*nW+2, −1) positions, the values of the outer neighboring reference samples are set to be equal to the value of a sample located at (2*nW, −1), and nW may indicate the width of the current block.

    IMAGE CODING METHOD AND DEVICE FOR CARRYING OUT MRL-BASED INTRA PREDICTION
    115.
    发明申请
    IMAGE CODING METHOD AND DEVICE FOR CARRYING OUT MRL-BASED INTRA PREDICTION 有权

    公开(公告)号：US20210344907A1

    公开(公告)日：2021-11-04

    申请号：US17374274

    申请日：2021-07-13

    Applicant: LG Electronics Inc.

    Inventor： Jin HEO ,  Sunmi YOO ,  Ling LI ,  Jangwon CHOI ,  Jungah CHOI

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

    Abstract: An image decoding method includes: configuring a MPM list including candidate intra prediction modes for a current block; deriving an intra prediction mode of the current block from the MPM list on the basis of MPM index information indicating an intra prediction mode, among the candidate intra prediction modes included in the MPM list, for the current block; generating prediction samples for the current block on the basis of the intra prediction mode; and generating a reconstructed picture for the current block on the basis of the prediction samples, wherein the step for configuring the MPM list comprises, on the basis of the case where the value of reference line index information, representing a reference line used for the intra prediction of the current block, is not zero, deriving a DC mode as one mode among the candidate intra prediction modes, and including same in the MPM list.

    IMAGE DECODING METHOD AND APPARATUS RELYING ON INTRA PREDICTION IN IMAGE CODING SYSTEM
    119.
    发明申请
    IMAGE DECODING METHOD AND APPARATUS RELYING ON INTRA PREDICTION IN IMAGE CODING SYSTEM 有权

    公开(公告)号：US20190320200A1

    公开(公告)日：2019-10-17

    申请号：US16340617

    申请日：2017-08-30

    Applicant: LG ELECTRONICS INC.

    Inventor： Jin HEO

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

    Abstract: 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 MODE-BASED IMAGE PROCESSING METHOD AND APPARATUS THEREFOR
    120.
    发明申请
    INTRA-PREDICTION MODE-BASED IMAGE PROCESSING METHOD AND APPARATUS THEREFOR 审中-公开

    公开(公告)号：US20190200011A1

    公开(公告)日：2019-06-27

    申请号：US16331497

    申请日：2016-09-08

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi YOO ,  Jin HEO

    IPC: H04N19/105 ,  H04N19/176 ,  H04N19/82 ,  H04N19/159

    CPC classification number: H04N19/105 ,  H04N19/11 ,  H04N19/117 ,  H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/80 ,  H04N19/82

    Abstract: Disclosed are an intra-prediction mode-based image processing method and an apparatus therefor. Particularly, the intra-prediction mode-based image processing method may comprise the steps of: generating a predicted sample of a current block on the basis of an intra-prediction mode of the current block; calculating the distance between the predicted sample and a first reference sample used to generate the predicted sample; and when the distance between the predicted sample and the first reference sample is larger than a filtering reference value, filtering the predicted sample by a weighted addition of the predicted sample and a second reference sample, wherein, among reference samples adjacent to the current block, at least one of a reference sample having the same horizontal coordinate component as the predicted sample and a reference sample having the same vertical coordinate component as the predicted sample is used as the second reference sample.

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