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    Method for encoding/decoding image signal and device for same
    1.
    发明授权
    Method for encoding/decoding image signal and device for same 有权

    公开(公告)号：US12231627B2

    公开(公告)日：2025-02-18

    申请号：US18466790

    申请日：2023-09-13

    Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

    Inventor： Bae Keun Lee

    IPC: H04N11/02 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/61

    Abstract: An image decoding method according to the present invention includes: a step for determining a reference sample line of a current block; a step for determining whether candidate intra-prediction modes identical to the intra-prediction mode of the current block exist; a step for deriving the intra-prediction mode of the current block on the basis of the determination; and a step for performing intra-prediction on the current block on the basis of the reference sample line and the intra-prediction mode. Here, at least one of the candidate intra prediction modes may be derived by adding or subtracting an offset to or from the maximum value among the intra-prediction mode of a neighboring block that is above the current block and the intra-prediction mode of a neighboring block that is to the left of the current block.

    Image decoding method and apparatus according to block division structure in image coding system
    5.
    发明授权
    Image decoding method and apparatus according to block division structure in image coding system 有权

    公开(公告)号：US12184850B2

    公开(公告)日：2024-12-31

    申请号：US18119602

    申请日：2023-03-09

    Applicant: LG Electronics Inc.

    Inventor： Junghak Nam ,  Jaehyun Lim

    IPC: H04N11/02 ,  H04N19/105 ,  H04N19/119 ,  H04N19/176 ,  H04N19/51 ,  H04N19/91

    Abstract: Provided is a video decoding method performed by a decoding apparatus, which includes: obtaining split information for a target block from a bitstream; splitting the target block into a first sub-block and a second sub-block based on a split boundary indicated by the split information; deriving a first motion information candidate list for the first sub-block and a second motion information candidate list for the second sub-block based on the split information for the target block; performing inter prediction of the first sub-block based on the first motion information candidate list; and performing inter prediction of the second sub-block based on the second motion information candidate list, in which the first sub-block and the second sub-block are non-rectangular blocks, and the first motion information candidate list for the first sub-block is different from the second motion information candidate list for the second sub-block.

    Context coding for information on transform kernel set in image coding system
    6.
    发明授权
    Context coding for information on transform kernel set in image coding system 有权

    公开(公告)号：US12166992B2

    公开(公告)日：2024-12-10

    申请号：US18117774

    申请日：2023-03-06

    Applicant: LG Electronics Inc.

    Inventor： Junghak Nam ,  Moonmo Koo ,  Jaehyun Lim ,  Seunghwan Kim

    IPC: H04N11/02 ,  H04N19/13 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18

    Abstract: An image decoding method, according to the present document, comprises a step of generating residual samples for a current block on the basis of residual information, wherein the residual samples are generated on the basis of information on a transform kernel set and transform coefficients for the current block, the transform coefficients are derived on the basis of the residual information, and the information on the transform kernel set represents a transform kernel set to be applied to the current block from among transform kernel set candidates. At least one bin from among bins of a bin string of the information on the transform kernel set is derived on the basis of context coding, and the context coding is performed on the basis of at least one context model.

    Weighted sample prediction for geometric partitioning mode
    7.
    发明授权
    Weighted sample prediction for geometric partitioning mode 有权

    公开(公告)号：US12143589B2

    公开(公告)日：2024-11-12

    申请号：US18461344

    申请日：2023-09-05

    Applicant: TENCENT AMERICA LLC

    Inventor： Lien-Fei Chen ,  Xiang Li ,  Guichun Li ,  Shan Liu

    IPC: H04N11/02 ,  H04N19/119 ,  H04N19/132 ,  H04N19/176 ,  H04N19/189

    Abstract: Aspects of the disclosure provide methods, apparatuses, and non-transitory computer-readable storage mediums for video encoding/decoding. An apparatus includes processing circuitry that partitions a current block of a current picture based on a geometric partitioning mode (GPM). The current block is partitioned into two partitions in the GPM mode. Each of the partitions is associated with a respective predictor. A weighting index for a sample of the current block is determined based on a position of the sample. A weighting factor is calculated based on the weighting index of the sample according to an equation that converts the weighting index to the weighting factor. The sample is encoded based on the weighting factor and the predictor corresponding to the sample.

    Transform-based image coding method and device for same
    8.
    发明授权
    Transform-based image coding method and device for same 有权

    公开(公告)号：US12132902B2

    公开(公告)日：2024-10-29

    申请号：US17773295

    申请日：2020-11-02

    Applicant: LG Electronics Inc.

    Inventor： Moonmo Koo ,  Seunghwan Kim ,  Jaehyun Lim

    IPC: H04N11/02 ,  H04N19/122 ,  H04N19/159 ,  H04N19/18 ,  H04N19/61

    CPC classification number: H04N19/122 ,  H04N19/159 ,  H04N19/18 ,  H04N19/61

    Abstract: An image decoding method according to the present disclosure comprises the steps of: deriving residual samples with respect to a target block on the basis of an inverse primary transform with respect to modified transform coefficients; and on the basis of the residual samples, generating a reconstructed picture, wherein a step of deriving the modified transform coefficients may include the steps of: parsing an LFNST index on the basis of the tree-type of a current block not being a dual-tree chroma and a MIP mode not being applicable to the current block; and deriving the modified transform coefficients on the basis of the LFNST index and an LFNST matrix.

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