中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

191 records (took 0.028 seconds)

    METHOD AND APPARATUS FOR CODING TRANSFORM COEFFICIENT IN VIDEO/IMAGE CODING SYSTEM
    173.
    发明申请
    METHOD AND APPARATUS FOR CODING TRANSFORM COEFFICIENT IN VIDEO/IMAGE CODING SYSTEM 有权

    公开(公告)号：US20220337811A1

    公开(公告)日：2022-10-20

    申请号：US17639273

    申请日：2020-08-31

    Applicant: LG Electronics Inc.

    Inventor： Jungah CHOI ,  Jaehyun LIM ,  Jin HEO ,  Sunmi YOO ,  Jangwon CHOI ,  Seunghwan KIM

    IPC: H04N19/105 ,  H04N19/169 ,  H04N19/18 ,  H04N19/176 ,  H04N19/70

    Abstract: A video decoding method performed by a decoding apparatus according to the present document may comprise the steps of: obtaining, from a bitstream, information indicating a level value of a transform coefficient in a current block; selecting one Rice parameter look-up table for the information indicating the level value of the transform coefficient, from among a plurality of Rice parameter look-up tables; deriving a Rice parameter for the information indicating the level value of the transform coefficient on the basis of the selected Rice parameter look-up table; deriving a bin string for the information indicating the level value of the transform coefficient on the basis of the Rice parameter; and deriving the level value of the transform coefficient on the basis of the bin string.

    CCLM-BASED INTRA-PREDICTION METHOD AND APPARATUS THEREFOR
    174.
    发明申请
    CCLM-BASED INTRA-PREDICTION METHOD AND APPARATUS THEREFOR 有权

    公开(公告)号：US20220311998A1

    公开(公告)日：2022-09-29

    申请号：US17834532

    申请日：2022-06-07

    Applicant: LG Electronics Inc.

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

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

    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.

    METHOD AND APPARATUS FOR DERIVING RICE PARAMETER IN VIDEO/IMAGE CODING SYSTEM
    175.
    发明申请
    METHOD AND APPARATUS FOR DERIVING RICE PARAMETER IN VIDEO/IMAGE CODING SYSTEM 有权

    公开(公告)号：US20220286691A1

    公开(公告)日：2022-09-08

    申请号：US17637290

    申请日：2020-08-20

    Applicant: LG ELECTRONICS INC.

    Inventor： Jungah CHOI ,  Jin HEO ,  Sunmi YOO ,  Jangwon CHOI ,  Jaehyun LIM ,  Seunghwan KIM

    IPC: H04N19/18 ,  H04N19/70 ,  H04N19/176 ,  H04N19/132

    Abstract: A video decoding method performed by a decoding apparatus comprises the steps of: acquiring, from a bitstream, residual information for a current transform block, wherein the residual information includes at least one of information indicating a level value of a target transform coefficient within the current transform block or information indicating a residual level value; based on a neighboring transform coefficient of the target transform coefficient, deriving a rice parameter for at least one of the information indicating the level value of the target transform coefficient or the information indicating the residual level value; based on the rice parameter, deriving a bin string for at least one of the information indicating the level value of the target transform coefficient or the information indicating the residual level value; and based on the bin string, deriving the level value of the target transform coefficient.

    INTRA PREDICTION METHOD ON BASIS OF MPM LIST AND APPARATUS THEREFOR
    177.
    发明申请
    INTRA PREDICTION METHOD ON BASIS OF MPM LIST AND APPARATUS THEREFOR 有权

    公开(公告)号：US20220191471A1

    公开(公告)日：2022-06-16

    申请号：US17442912

    申请日：2020-03-23

    Applicant: LG ELECTRONICS INC.

    Inventor： Ling LI ,  Jaehyun LIM ,  Jin HEO ,  Jangwon CHOI ,  Seunghwan KIM

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

    Abstract: An image decoding method performed by a decoding apparatus according to the present disclosure comprises the steps of: obtaining intra prediction information including at least one of MPM flag information, MRL index information, and planner flag information from a bitstream; checking the MPM flag information; checking the MRL index information on the basis of a case where the MPM flag information indicates that the MRL index information is checked; checking the planner flag information on the basis of a case where a value of the MRL index information is 0; deriving an intra prediction mode for a current block on the basis of the check for the planner flag information; deriving prediction samples for the current block on the basis of the intra prediction mode for the current block; and generating a reconstructed picture on the basis of the prediction samples.

    METHOD AND DEVICE FOR IMAGE DECODING ON BASIS OF CCLM PREDICTION IN IMAGE CODING SYSTEM
    179.
    发明申请
    METHOD AND DEVICE FOR IMAGE DECODING ON BASIS OF CCLM PREDICTION IN IMAGE CODING SYSTEM 有权

    公开(公告)号：US20220174275A1

    公开(公告)日：2022-06-02

    申请号：US17667957

    申请日：2022-02-09

    Applicant: LG ELECTRONICS INC.

    Inventor： Jangwon CHOI ,  Seunghwan Kim ,  Jin Heo

    IPC: H04N19/11 ,  H04N19/105 ,  H04N19/593 ,  H04N19/176 ,  H04N19/46 ,  H04N19/132 ,  H04N19/186

    Abstract: A method for image decoding performed by a decoding device according to the present document comprises the steps of: deriving a specific value for a current chroma block; when a width and a height of the current chroma block have a value equal to or greater than the specific value, deriving upper peripheral chroma samples of a number equal to the specific value of the current chroma block and left peripheral chroma samples of a number equal to the specific value; deriving CCLM parameters on the basis of the upper peripheral chroma samples, the left peripheral chroma samples, and down-sampled peripheral luma samples; and deriving prediction samples for the current chroma block on the basis of the down-sampled luma samples and the CCLM parameters, wherein the derived specific value is 2.

    IMAGE CODING METHOD AND DEVICE USING TRANSFORM SKIP FLAG
    180.
    发明申请
    IMAGE CODING METHOD AND DEVICE USING TRANSFORM SKIP FLAG 有权

    公开(公告)号：US20220174269A1

    公开(公告)日：2022-06-02

    申请号：US17669044

    申请日：2022-02-10

    Applicant: LG ELECTRONICS INC.

    Inventor： Sunmi YOO ,  Jungah CHOI ,  Jangwon CHOI ,  Seunghwan KIM

    IPC: H04N19/103 ,  H04N19/176 ,  H04N19/61

    Abstract: A method for decoding an image according to the present document includes obtaining prediction mode information and residual related information from a bitstream, deriving prediction samples of a current block by performing prediction based on the prediction mode information, deriving residual samples of the current block based on the residual related information, and generating reconstruction samples of the current block based on the prediction samples and the residual samples, and the residual related information includes a transform skip flag based on a size of the current block and a maximum transform skip size, the transform skip flag represents whether a transform skip is applied to the current block, and information about the maximum transform skip size is obtained from the bitstream.

Patent Agency Ranking