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    Image decoding method and device using residual information in image coding system
    132.
    发明授权
    Image decoding method and device using residual information in image coding system 有权

    公开(公告)号：US12028526B2

    公开(公告)日：2024-07-02

    申请号：US18142199

    申请日：2023-05-02

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi Yoo ,  Jin Heo ,  Ling Li ,  Jangwon Choi ,  Jungah Choi ,  Seunghwan Kim

    IPC: H04N19/13 ,  H04N19/124 ,  H04N19/136 ,  H04N19/176 ,  H04N19/60

    CPC classification number: H04N19/13 ,  H04N19/124 ,  H04N19/136 ,  H04N19/176 ,  H04N19/60

    Abstract: An image decoding method includes receiving residual information including first size related information for a first residual coefficient and second size related information for a second residual coefficient, setting a Rice parameter of the first size related information and the second size related information as a specific value, deriving available binary values based on the Rice parameter, deriving binary values of the first size related information and the second size related information by decoding the first size related information and the second size related information, deriving values of the first size related information and the second size related information by comparing the binary values and the available binary values, deriving the first residual coefficient and the second residual coefficient based on the values, and reconstructing a current picture based on the first residual coefficient and the second residual coefficient.

    METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL FOR INTRA PREDICTION
    135.
    发明公开
    METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL FOR INTRA PREDICTION 审中-公开

    公开(公告)号：US20240179306A1

    公开(公告)日：2024-05-30

    申请号：US18432905

    申请日：2024-02-05

    Applicant: LG ELECTRONICS INC.

    Inventor： Jin HEO ,  Sunmi Yoo ,  Ling Li ,  Jangwon Choi ,  Jungah Choi

    IPC: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593

    CPC classification number: H04N19/11 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/46 ,  H04N19/593

    Abstract: Embodiments of the present specification provide a method and a device for processing a video signal for intra prediction. A method for decoding a video signal according an embodiment of the present disclosure includes: obtaining intra prediction information of a current block to which the intra prediction is applied, in which the intra prediction information includes a first flag indicating a predetermined first mode; determining an intra prediction mode of the current block based on the intra prediction information, wherein when the first flag corresponds to a first value, the first mode is determined as the intra prediction mode and when the first flag corresponds to a second value, one of a plurality of candidate modes is determined as the intra prediction mode; and generating a prediction sample of the current block based on the intra prediction mode and a reference sample in a current picture. A separate flag indicating whether to use a primarily used specific mode is used to reduce a data amount for transmission of the intra prediction mode and a processing time of information of the intra prediction.

    CCLM-based intra-prediction method and device
    137.
    发明授权
    CCLM-based intra-prediction method and device 有权

    公开(公告)号：US11973954B2

    公开(公告)日：2024-04-30

    申请号：US17739468

    申请日：2022-05-09

    Applicant: LG ELECTRONICS INC.

    Inventor： Jangwon Choi ,  Jin Heo ,  Sunmi Yoo ,  Ling Li

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196

    CPC classification number: H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/172 ,  H04N19/196

    Abstract: A method for decoding a picture based on a cross-component linear model (CCLM) mode includes deriving neighboring luma reference samples of a luma block, deriving down-sampled neighboring luma reference samples, deriving a linear model parameter based on the down-sampled neighboring luma reference samples and the neighboring chroma reference samples, where the neighboring luma reference samples includes top neighboring luma reference samples, and left neighboring luma reference samples, and where when the top boundary of the luma block overlaps with a boundary of a coding tree unit (CTU), the number of the top neighboring luma reference samples used for deriving the down-sampled neighboring luma reference samples among the neighboring luma reference samples is less than that of the left neighboring luma reference samples used for deriving the down-sampled neighboring luma reference samples.

    Method and apparatus for decoding image by using transform according to block size in image coding system
    138.
    发明授权
    Method and apparatus for decoding image by using transform according to block size in image coding system 有权

    公开(公告)号：US11949875B2

    公开(公告)日：2024-04-02

    申请号：US18127192

    申请日：2023-03-28

    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.

    Image decoding method for residual coding, and device therefor
    139.
    发明授权
    Image decoding method for residual coding, and device therefor 有权

    公开(公告)号：US11882296B2

    公开(公告)日：2024-01-23

    申请号：US17957986

    申请日：2022-09-30

    Applicant: LG Electronics Inc.

    Inventor： Jungah Choi ,  Sunmi Yoo ,  Junghak Nam ,  Jin Heo ,  Jangwon Choi ,  Seunghwan Kim

    IPC: H04N19/18 ,  H04N19/184 ,  H04N19/70

    CPC classification number: H04N19/18 ,  H04N19/184 ,  H04N19/70

    Abstract: An image decoding method carried out by a decoding device, according to the present document, comprises the steps of: acquiring a sign data hiding enable flag; acquiring a transform skip residual coding (TSRC) enable flag on the basis of the sign data hiding enable flag; acquiring residual information for a current block, on the basis of the TSRC enable flag; deriving a residual sample of the current block, on the basis of the residual information; and generating a reconstructed picture on the basis of the residual sample, wherein the sign data hiding enable flag is a flag indicating whether sign data hiding is enabled, the TSRC enable flag is a flag indicating whether TSRC is enabled, and the TSRC enable flag is acquired on the basis of the sign data hiding enable flag having a value of zero.

    Image prediction method and apparatus for performing intra prediction
    140.
    发明授权
    Image prediction method and apparatus for performing intra prediction 有权

    公开(公告)号：US11843801B2

    公开(公告)日：2023-12-12

    申请号：US17876402

    申请日：2022-07-28

    Applicant: LG Electronics Inc.

    Inventor： Sunmi Yoo ,  Jin Heo

    IPC: H04N19/593 ,  H04N19/11 ,  H04N19/117 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

    CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/117 ,  H04N19/132 ,  H04N19/136 ,  H04N19/176

    Abstract: An image decoding method according to the present document may comprise the steps of: deriving an intra prediction mode for a current block; deriving reference samples located around the current block; generating a prediction sample for the current block on the basis of the intra prediction mode and the reference samples; and generating residual samples for the current block on the basis of the prediction sample, wherein the step of generating the prediction sample for the current block may comprise the steps of: deriving an interpolation filter, which is to be applied to the reference sample, on the basis of the prediction mode of the current block or the size of the current block; and generating the prediction sample by applying the derived interpolation filter to the reference sample.

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