知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

299 records (took 0.036 seconds)

    Method and apparatus for decoding image by using transform according to block size in image coding system
    192.
    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：US11647200B2

    公开(公告)日：2023-05-09

    申请号：US17514113

    申请日：2021-10-29

    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 prediction method and device for deriving chroma intra prediction mode
    193.
    发明授权
    Image prediction method and device for deriving chroma intra prediction mode 有权

    公开(公告)号：US11582482B2

    公开(公告)日：2023-02-14

    申请号：US17299630

    申请日：2019-11-27

    Applicant: LG ELECTRONICS INC.

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

    IPC: H04N19/593 ,  H04N19/105 ,  H04N19/11 ,  H04N19/186

    Abstract: An image decoding method according to the present document includes: a step for deriving a luma intra prediction mode; and a step for generating a chroma candidate mode list for a chroma block including a preset number of chroma intra candidates by using at least one among a DM, a planar mode, a DC mode, a vertical mode, a horizontal mode, and an up-right diagonal mode, which are derived from the luma intra prediction mode, wherein the DM is a prediction mode corresponding to a center (CR) position of the luma block, and the chroma intra candidates other than the DM can be derived through a duplicate check of the DM and a prediction mode corresponding to any one among the top left (TL), top right (TR), bottom left (BL), and bottom right (BR) of the luma block, the planar mode, the DC mode, the vertical mode, and the horizontal mode.

    Intra prediction method and apparatus in image coding system
    197.
    发明授权
    Intra prediction method and apparatus in image coding system 有权

    公开(公告)号：US11509891B2

    公开(公告)日：2022-11-22

    申请号：US17279459

    申请日：2019-09-03

    Applicant: LG ELECTRONICS INC.

    Inventor： Ling Li ,  Seunghwan Kim ,  Jin Heo

    IPC: H04N19/11 ,  H04N19/105 ,  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 a reference sample line index of a current block and most probable mode (MPM)-related information; constructing an alternative MPM list on the basis of the reference sample line index; deriving an intra prediction mode of the current block on the basis of the alternative MPM list and the MPM-related information; and generating a predicted block of the current block on the basis of the intra prediction mode, wherein the alternative MPM list is constructed on the basis of an intra prediction mode of an upper adjacent block of the current block and an intra prediction mode of a left adjacent block of the current block.

    Image decoding method for residual data coding in image coding system, and apparatus therefor
    198.
    发明授权
    Image decoding method for residual data coding in image coding system, and apparatus therefor 有权

    公开(公告)号：US11490125B2

    公开(公告)日：2022-11-01

    申请号：US17673201

    申请日：2022-02-16

    Applicant: LG ELECTRONICS INC.

    Inventor： Jungah Choi ,  Jin Heo ,  Sunmi Yoo ,  Jaehyun Lim ,  Jangwon Choi ,  Seunghwan Kim

    IPC: H04N19/70 ,  H04N19/132 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46

    Abstract: An image decoding method performed by a decoding apparatus, according to the present document, comprises the steps of: acquiring syntax elements for a first transform coefficient through an n-th transform coefficient of a current block, wherein the syntax elements are syntax elements according to a first residual data coding structure of TSRC; and acquiring syntax elements for an n+1st transform coefficient through a last transform coefficient of the current block, wherein the syntax elements are syntax elements according to a second residual data coding structure of the TSRC, wherein the number of context-coded syntax elements for the first transform coefficient through the n-th transform coefficient is equal to the maximum number of context-coded bins of the current block, and the syntax elements according to the second residual data coding structure include coefficient level information and a sign flag for a transform coefficient.

Patent Agency Ranking