知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

278 records (took 0.033 seconds)

    DMVR-BASED INTER-PREDICTION METHOD AND DEVICE
    101.
    发明申请
    DMVR-BASED INTER-PREDICTION METHOD AND DEVICE 有权

    公开(公告)号：US20240388732A1

    公开(公告)日：2024-11-21

    申请号：US18787355

    申请日：2024-07-29

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

    IPC: H04N19/52 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/577 ,  H04N19/70

    Abstract: An image decoding method includes: acquiring, from a bitstream, luma weight L0 flag information indicating whether there is an L0 prediction-related weight factor and luma weight L1 flag information indicating whether there is an L1 prediction-related weight factor; determining to apply decoder-side motion vector refinement (DMVR) to an L0 motion vector and L1 motion vector for a current block, when the luma weight L0 flag information and the luma weight L1 flag information are both zero; when it has been determined to apply DMVR, deriving a refined L0 motion vector and a refined L1 motion vector by applying the DMVR to the current block; deriving prediction samples for the current block on the basis of L0 prediction using the refined L0 motion vector and L1 prediction using the refined L1 motion vector; and generating reconstruction samples for the current block on the basis of the prediction samples.

    VIDEO CODING METHOD ON BASIS OF SECONDARY TRANSFORM, AND DEVICE THEREFOR
    103.
    发明公开
    VIDEO CODING METHOD ON BASIS OF SECONDARY TRANSFORM, AND DEVICE THEREFOR 审中-公开

    公开(公告)号：US20240348829A1

    公开(公告)日：2024-10-17

    申请号：US18742373

    申请日：2024-06-13

    Applicant: LG Electronics Inc.

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

    IPC: H04N19/61 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

    CPC classification number: H04N19/61 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18

    Abstract: A video transform method includes: receiving a quantized transform coefficient for a target block and a transform index for a non-separated secondary transform; inverse-quantizing the quantized transform coefficient; deriving an input transform coefficient size indicating the length of the inverse-quantized transform coefficient to which the non-separated secondary transform has been applied, an output transform coefficient size indicating the length of a modified transform coefficient to which the non-separated secondary transform has been applied, and a transform set mapped to the intra mode of the target block, when the transform index does not indicate that the non-separated secondary transform is not performed; and deriving the modified transform coefficient on the basis of a matrix operation on a transform kernel matrix in the transform set indicated by the transform index, and a transform coefficient list corresponding to the input transform coefficient size.

    DMVR-BASED INTER-PREDICTION METHOD AND DEVICE
    105.
    发明公开
    DMVR-BASED INTER-PREDICTION METHOD AND DEVICE 审中-公开

    公开(公告)号：US20240291998A1

    公开(公告)日：2024-08-29

    申请号：US18650478

    申请日：2024-04-30

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM

    IPC: H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513

    CPC classification number: H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/513

    Abstract: An image decoding method comprises the steps of: determining whether or not an application condition of decoder-side motion vector refinement (DMVR) for applying motion vector refinement for a current block is satisfied; deriving a minimum sum of absolute differences (SAD) on the basis of L0 and L1 motion vectors of the current block if the application condition of the DMVR is satisfied; deriving refined L0 and L1 motion vectors of the current block based on the minimum SAD; deriving prediction samples of the current block based on the refined L0 and L1 motion vectors; and generating reconstructed samples of the current block based on the prediction samples. With respect to whether or not the application condition of the DMVR is satisfied, the application condition of the DMVR is determined to be satisfied if a prediction mode, in which inter-prediction and intra-prediction are combined, is not applied to the current block.

    INTER-PREDICTION METHOD AND DEVICE BASED ON DMVR AND BDOF
    106.
    发明公开
    INTER-PREDICTION METHOD AND DEVICE BASED ON DMVR AND BDOF 审中-公开

    公开(公告)号：US20240187605A1

    公开(公告)日：2024-06-06

    申请号：US18441466

    申请日：2024-02-14

    Applicant: LG Electronics Inc.

    Inventor： Naeri PARK ,  Junghak NAM ,  Hyeongmoon JANG

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

    CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

    Abstract: An image decoding method according to the present document is characterized in that: decoder-side motion vector refinement (DMVR) is applied to derive refined L0 and L1 motion vectors on the basis of L0 and L1 motion vectors of the current block; prediction samples of the current block are derived on the basis of L0 prediction samples derived on the basis of the refined L0 motion vector and L1 prediction samples derived on the basis of the refined L1 motion vector; and recovery samples of the current block are generated on the basis of the prediction samples, wherein the L0 prediction samples are derived on the basis of an L0 reference picture and the refined L0 motion vector, the L1 prediction samples are derived on the basis of an L1 reference picture and the refined L1 motion vector, and in the step for deriving the prediction samples, whether to apply a bi-directional optical flow (BDOF) process is determined on the basis of whether a first POC difference between the current picture and the L0 reference picture and a second POC difference between the current picture and the L1 reference picture are the same.

    IMAGE PROCESSING METHOD, AND DEVICE FOR SAME
    109.
    发明公开
    IMAGE PROCESSING METHOD, AND DEVICE FOR SAME 审中-公开

    公开(公告)号：US20240121393A1

    公开(公告)日：2024-04-11

    申请号：US18542173

    申请日：2023-12-15

    Applicant: LG Electronics Inc.

    Inventor： Hyeongmoon JANG ,  Junghak NAM ,  Seunghwan KIM ,  Jaehyun LIM

    IPC: H04N19/13 ,  H04N19/119 ,  H04N19/124 ,  H04N19/176 ,  H04N19/61

    CPC classification number: H04N19/13 ,  H04N19/119 ,  H04N19/124 ,  H04N19/176 ,  H04N19/61

    Abstract: The present invention discloses a method for encoding/decoding a video signal and an apparatus for the method. More specifically, a method for decoding a video signal comprises generating a residual block of a current block by performing entropy decoding on the video signal; if size of the current block is smaller than a predetermined first size, parsing a transform skip flag which indicates whether a transform skip is applied to the current block; determining whether to parse a primary transform flag which indicates whether a primary transform is applied to the current block; if it is determined to parse the primary transform flag, parsing the primary transform flag; and if the primary transform flag indicates that a primary transform is applied to the current block, generating a primary inverse transformed transform block of the current block by performing a primary inverse transform to the residual block.

Patent Agency Ranking