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    CROSS-COMPONENT RESIDUAL PREDICTION BY USING RESIDUAL TEMPLATE
    4.
    发明公开
    CROSS-COMPONENT RESIDUAL PREDICTION BY USING RESIDUAL TEMPLATE 审中-公开

    公开(公告)号：US20240357097A1

    公开(公告)日：2024-10-24

    申请号：US18643953

    申请日：2024-04-23

    申请人： Tencent America LLC

    发明人： Lien-Fei CHEN ,  Xin ZHAO ,  Roman CHERNYAK ,  Xiaozhong XU ,  Shan LIU

    IPC分类号： H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    CPC分类号： H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    摘要： The various implementations described herein include methods and systems for coding video. In one aspect, a video bitstream includes a current image frame having a current coding block and signals a first syntax element for a residual template cross-component residual model (RT-CCRM) mode. When the RT-CCRM mode is enabled, the computing system identifies, in the current coding block, a first chroma sample and one or more luma samples corresponding to the first chroma sample, determines one or more residuals of the one or more luma samples in the current coding block, and applies a residual filter corresponding to the RT-CCRM mode to generate a first residual of the first chroma sample based on the residuals of the one or more luma samples. The computing system reconstructs the current image frame by compensating a predicted chroma sample with at least the first residual to reconstruct the first chroma sample.

    TEMPLATE-MATCHING BASED ADAPTIVE MOTION VECTOR RESOLUTION (AMVR)
    6.
    发明公开
    TEMPLATE-MATCHING BASED ADAPTIVE MOTION VECTOR RESOLUTION (AMVR) 审中-公开

    公开(公告)号：US20240323389A1

    公开(公告)日：2024-09-26

    申请号：US18735721

    申请日：2024-06-06

    申请人： Tencent America LLC

    发明人： Lien-Fei CHEN ,  Xiang LI ,  Shan LIU

    IPC分类号： H04N19/136 ,  H04N19/105 ,  H04N19/176 ,  H04N19/88

    CPC分类号： H04N19/136 ,  H04N19/105 ,  H04N19/176 ,  H04N19/88

    摘要： Aspects of the disclosure provide methods and apparatuses for video coding. A method for video decoding includes receiving a coded video bitstream that includes prediction information of a current block in a current picture. The prediction information indicates that an adaptive motion vector prediction (AMVP) mode and an adaptive motion vector resolution (AMVR) mode are applied to the current block. A set of motion vector (MV) resolutions in the AMVR mode is available for the current block. The method includes determining respective template matching (TM) costs corresponding to each of a plurality of MV resolutions in the set of MV resolutions based on the plurality of MV resolutions and motion information of the current block, reordering the plurality of MV resolutions based on the determined TM costs, selecting an MV resolution from the reordered plurality of MV resolutions, and reconstructing the current block based on the selected MV resolution.

    CONSTRAINED TEMPLATE MATCHING
    7.
    发明公开
    CONSTRAINED TEMPLATE MATCHING 审中-公开

    公开(公告)号：US20240323386A1

    公开(公告)日：2024-09-26

    申请号：US18680979

    申请日：2024-05-31

    申请人： Tencent America LLC

    发明人： Xiang LI ,  Lien-Fei CHEN ,  Guichun LI ,  Shan LIU

    IPC分类号： H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

    CPC分类号： H04N19/132 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

    摘要： An apparatus includes processing circuitry that is configured to determine whether at least one sample of a plurality of samples in a first template of a current block is in an intra coded block that is a spatial neighboring block of the current block, the first template including one or more samples of (1) top neighboring blocks and (2) left neighboring blocks of the current block. The processing circuitry is configured to, when (i) the at least one sample is included in the intra coded block and (ii) a template matching mode is applied to the current block, exclude the at least one sample from the first template to generate a second template for the current block. The processing circuitry is configured to determine a motion vector of the current block based on the second template. The processing circuitry is configured to reconstruct the current block based on the MV.

    Motion Compensated Picture Boundary Padding
    8.
    发明公开
    Motion Compensated Picture Boundary Padding 审中-公开

    公开(公告)号：US20240314348A1

    公开(公告)日：2024-09-19

    申请号：US18497748

    申请日：2023-10-30

    申请人： TENCENT AMERICA LLC

    发明人： Liang ZHAO ,  Xin ZHAO ,  Shan LIU

    IPC分类号： H04N19/517 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

    CPC分类号： H04N19/517 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

    摘要： This disclosure relates generally to video coding and particularly to methods and systems for boundary padding for motion compensation. For example, a motion vector for a motion compensation padded block in a motion compensation padding area of a picture in a video may be determined from scanning a set of neighboring boundary blocks of the picture and/or a set of co-located temporal blocks of the boundary blocks. The motion compensation padded block may be padded according to the motion vector and used for motion compensation of other pictures in the video.

    METHOD AND APPARATUS FOR SECONDARY TRANSFORM WITH ADAPTIVE KERNEL OPTIONS
    9.
    发明公开
    METHOD AND APPARATUS FOR SECONDARY TRANSFORM WITH ADAPTIVE KERNEL OPTIONS 审中-公开

    公开(公告)号：US20240314320A1

    公开(公告)日：2024-09-19

    申请号：US18668876

    申请日：2024-05-20

    申请人： TENCENT AMERICA LLC

    发明人： Madhu PERINGASSERY KRISHNAN ,  Xin ZHAO ,  Shan LIU

    IPC分类号： H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

    CPC分类号： H04N19/13 ,  H04N19/159 ,  H04N19/176 ,  H04N19/18 ,  H04N19/91

    摘要： This disclosure relates to secondary transform of video blocks with adaptive kernel options. For example, a method for decoding a video block in a video stream is disclosed. The method may include comprising parsing and processing the video stream to generate: a set of secondary transform coefficients associated with the video block; an intra prediction mode associated with the video block; and a kernel index indicating a secondary transform kernel among a group of secondary transform kernels. The method may further include identifying the group of secondary transform kernels based on the intra prediction mode; and performing an inverse secondary transform of the set of secondary transform coefficients to generate primary transform coefficients of the video block based on the secondary transform kernel among the group of secondary transform kernels identified by the kernel index. The quantity of kernels in the group of secondary transform kernels depends on at least one of: the intra prediction mode associated with the video block; a size of the video block; or a primary transform type associated with the video block.