知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

278 records (took 0.02 seconds)

    INTER-PREDICTION METHOD AND DEVICE BASED ON DMVR AND BDOF
    181.
    发明申请
    INTER-PREDICTION METHOD AND DEVICE BASED ON DMVR AND BDOF 有权

    公开(公告)号：US20230045157A1

    公开(公告)日：2023-02-09

    申请号：US17959001

    申请日：2022-10-03

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    Abstract: An image decoding method includes: deriving a refined L0 motion vector and a refined L1 motion vector by applying decoder-side motion vector refinement (DMVR) based on an L0 motion vector and an L1 motion vector of a current block, deriving prediction samples for the current block based on L0 prediction samples derived based on the refined L0 motion vector and L1 prediction samples derived based on the refined L1 motion vector, and generating reconstructed samples for the current block based on the prediction samples. The L0 prediction samples are derived based on an L0 reference picture and the refined L0 motion vector, and the L1 prediction samples are derived based on an L1 reference picture and the refined L1 motion vector, and deriving the prediction samples comprises determining whether to apply bi-directional optical flow (BDOF) process based on a first POC difference and a second POC difference are the same.

    TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR
    183.
    发明申请
    TRANSFORM-BASED IMAGE CODING METHOD AND DEVICE THEREFOR 有权

    公开(公告)号：US20230012486A1

    公开(公告)日：2023-01-19

    申请号：US17894745

    申请日：2022-08-24

    Applicant: LG Electronics Inc.

    Inventor： Moonmo KOO ,  Jaehyun LIM ,  Junghak NAM ,  Seunghwan KIM

    IPC: H04N19/132 ,  H04N19/105 ,  H04N19/176 ,  H04N19/18

    Abstract: An image decoding method, according to the present document, may comprise the steps of: deriving transform coefficients for a current block on the basis of residual information; determining whether a significant coefficient is present in a second region excluding a first region in the top-left end of the current block; parsing a LFNST index from a bitstream if the significant coefficient is not present in the second region; deriving modified transform coefficients by applying a LFNST matrix, derived on the basis of the LFNST index, to transform coefficients of the first region; and deriving residual samples of the current block on the basis of an inverse primary transform of the modified transform coefficients.

    IMAGE DECODING METHOD AND DEVICE THEREOF
    187.
    发明申请
    IMAGE DECODING METHOD AND DEVICE THEREOF 有权

    公开(公告)号：US20220150542A1

    公开(公告)日：2022-05-12

    申请号：US17612186

    申请日：2020-05-22

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

    IPC: H04N19/593 ,  H04N19/176 ,  H04N19/159 ,  H04N19/70

    Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: acquiring a block-based delta pulse code modulation (BDPCM) flag for a current block; on the basis of the BDPCM flag indicating that BDPCM is applied to the current block, acquiring a BDPCM direction flag for the current block; and storing, as an intra-prediction mode of the current block, an intra-prediction mode of a prediction direction derived on the basis of the BDPCM direction flag.

    METHOD AND DEVICE FOR DECODING IMAGE BY USING BDPCM IN IMAGE CODING SYSTEM
    188.
    发明申请
    METHOD AND DEVICE FOR DECODING IMAGE BY USING BDPCM IN IMAGE CODING SYSTEM 有权

    公开(公告)号：US20220150527A1

    公开(公告)日：2022-05-12

    申请号：US17612097

    申请日：2020-05-22

    Applicant: LG Electronics Inc.

    Inventor： Sunmi YOO ,  Junghak NAM ,  Jungah CHOI

    IPC: H04N19/46 ,  H04N19/70 ,  H04N19/132 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176

    Abstract: An image decoding method performed by a decoding device according to the present document comprises the steps of: acquiring a block-based delta pulse code modulation (BDPCM) flag indicating whether BDPCM is applied to a current block; on the basis of the BDPCM flag, acquiring residual information and a BDPCM direction flag indicating a prediction direction for the current block; on the basis of the BDPCM direction flag, deriving the prediction direction; and storing, as an intra-prediction mode of the current block, an intra-prediction mode of the prediction direction derived on the basis of the BDPCM direction flag.

    CODING OF INFORMATION ABOUT TRANSFORM KERNEL SET
    189.
    发明申请
    CODING OF INFORMATION ABOUT TRANSFORM KERNEL SET 有权

    公开(公告)号：US20220150497A1

    公开(公告)日：2022-05-12

    申请号：US17556099

    申请日：2021-12-20

    Applicant: LG Electronics Inc.

    Inventor： Junghak NAM ,  Moonmo KOO ,  Jaehyun LIM ,  Seunghwan KIM

    IPC: H04N19/12 ,  H04N19/132 ,  H04N19/18 ,  H04N19/176

    Abstract: An image decoding method includes: acquiring a multiple transform selection (MTS) index and residual information from a bitstream; deriving transform coefficients for the current block on the basis of the residual information; and generating residual samples of the current block on the basis of the MTS index and the transform coefficients, wherein the MTS index indicates a transform kernel set to be applied to the current block among transform kernel set candidates, at least one bin among bins of a bin string of the MTS index is derived on the basis of context coding, the context coding is performed on the basis of values of increase and decrease in a context index pertaining to the MTS index, and a single value of increase and decrease in the context index can be used for the context coding of the first bin among the bins of the bin string.

Patent Agency Ranking