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    EXTENSION TO BLOCK ADAPTIVE WEIGHTED PREDICTION
    41.
    发明申请
    EXTENSION TO BLOCK ADAPTIVE WEIGHTED PREDICTION 有权

    公开(公告)号：US20240380894A1

    公开(公告)日：2024-11-14

    申请号：US18464540

    申请日：2023-09-11

    Applicant: Tencent America LLC

    Inventor： Liang ZHAO ,  Xin ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

    IPC: H04N19/139 ,  H04N19/105 ,  H04N19/176 ,  H04N19/70

    Abstract: This disclosure relates generally to video coding/decoding and particularly for providing extension to block adaptive weighted prediction (BAWP) with multiple motion vectors. One method includes receiving a coded video bitstream; identifying, from the coded video bitstream, a first motion vector corresponding to a first reference block and a second motion vector corresponding to a second reference block; obtaining a first scaling factor corresponding to the first motion vector and a second scaling factor corresponding to the second motion vector by parsing the coded video bitstream; generating a first predicted block based on the first scaling factor and the first reference block according to a first linear equation; generating a second predicted block based on the second reference block according to a second linear equation; and reconstructing the current block based on the first predicted block and the second predicted block.

    SYSTEMS AND METHODS FOR SMOOTH MODE PREDICTIONS
    42.
    发明申请
    SYSTEMS AND METHODS FOR SMOOTH MODE PREDICTIONS 有权

    公开(公告)号：US20240372983A1

    公开(公告)日：2024-11-07

    申请号：US18474517

    申请日：2023-09-26

    Applicant: Tencent America LLC

    Inventor： Xin ZHAO ,  Jing YE ,  Liang ZHAO ,  Han GAO ,  Shan LIU

    IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/50

    Abstract: The various implementations described herein include methods and systems for encoding and decoding video. In one aspect, a method of video decoding includes receiving video data that includes a first block from a video bitstream, where the first block is encoded in a smooth mode. The method further includes identifying a set of reference samples for the first block and deriving a first prediction value for the first block. The method also includes deriving a refined first prediction value for the first block using a weighted sum of a first reference sample of the set of reference samples and the first prediction value and decoding the first block based on the refined first prediction value.

    BLOCK BASED WEIGHTING FACTOR FOR JOINT MOTION VECTOR DIFFERENCE CODING MODE
    43.
    发明公开
    BLOCK BASED WEIGHTING FACTOR FOR JOINT MOTION VECTOR DIFFERENCE CODING MODE 审中-公开

    公开(公告)号：US20240314343A1

    公开(公告)日：2024-09-19

    申请号：US18215704

    申请日：2023-06-28

    Applicant: Tencent America LLC

    Inventor： Liang ZHAO ,  Xin ZHAO ,  Han GAO ,  Shan LIU

    IPC: H04N19/44 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

    CPC classification number: H04N19/44 ,  H04N19/105 ,  H04N19/137 ,  H04N19/176

    Abstract: Aspects of the disclose provide methods and an apparatus for video and/or image coding. The apparatus includes processing circuitry that receive a bitstream including a frame. Coding information for a block in the frame indicates that the block is coded with a joint motion vector difference (JMVD) coding mode and a compound weighted prediction mode. The coding information includes scaling factor information of the JMVD coding mode. If the scaling factor information indicates that each of scaling factors of components of at least one MVD associated with at least one respective reference frame of the block is a pre-defined scaling factor, a weighting factor of the compound weighted prediction mode is determined based on a list of weighting factors. Otherwise, the weighting factor of the compound weighted prediction mode is determined based on a subset of the list of weighting factors.

    ANGULAR INTRA PREDICTION
    44.
    发明公开
    ANGULAR INTRA PREDICTION 审中-公开

    公开(公告)号：US20240297979A1

    公开(公告)日：2024-09-05

    申请号：US18215333

    申请日：2023-06-28

    Applicant: Tencent America LLC

    Inventor： Liang ZHAO ,  Xin ZHAO ,  Jing YE ,  Han GAO ,  Shan LIU

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

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

    Abstract: Coded information of a current block and neighboring blocks of the current block is received, where the current block is predicted in an intra directional mode. The intra directional mode of the current block is determined to be associated with an angle that is one of smaller than 90 degrees and larger than 180 degrees. In response to the intra directional mode of the current block being associated with the angle, whether a delta angle associated with the current block is a pre-defined delta angle is determined. In response to the delta angle associated with the current block not being the pre-defined delta angle, a single direction intra prediction and not a bi-direction intra prediction is applied to the current block. A sample of the current block is reconstructed based on an adjacent reference sample on a reference line that is determined according to the single direction intra prediction.

    SYSTEMS AND METHODS FOR WEDGE-BASED PREDICTION MODE SIGNALING
    45.
    发明公开
    SYSTEMS AND METHODS FOR WEDGE-BASED PREDICTION MODE SIGNALING 审中-公开

    公开(公告)号：US20240205459A1

    公开(公告)日：2024-06-20

    申请号：US18143522

    申请日：2023-05-04

    Applicant: Tencent America LLC

    Inventor： Han GAO ,  Xin ZHAO ,  Liang ZHAO ,  Shan LIU

    IPC: H04N19/70 ,  H04N19/119 ,  H04N19/13 ,  H04N19/157 ,  H04N19/169 ,  H04N19/176 ,  H04N19/50

    CPC classification number: H04N19/70 ,  H04N19/119 ,  H04N19/13 ,  H04N19/157 ,  H04N19/176 ,  H04N19/1887 ,  H04N19/50

    Abstract: The various embodiments described herein include methods and systems for encoding and decoding video. In one aspect, a method includes receiving video data comprising a plurality of blocks, including a first block. The method also includes obtaining, from the video data, a syntax element value indicating a wedge mode index corresponding to a first partition mode from a plurality of partition modes for the first block, where the wedge mode index is greater than 16. The method further includes determining that the first partition mode is associated with a compound wedge-based prediction for the first block. The method also includes partitioning the first block into a first section and a second section in accordance with the first partition mode and the wedge mode index, and decoding the first section in accordance with a first predictor and decoding the second section in accordance with a second predictor.

    SYSTEMS AND METHODS FOR WARP EXTEND AND WARP DELTA SIGNALING
    46.
    发明公开
    SYSTEMS AND METHODS FOR WARP EXTEND AND WARP DELTA SIGNALING 审中-公开

    公开(公告)号：US20240171734A1

    公开(公告)日：2024-05-23

    申请号：US18127378

    申请日：2023-03-28

    Applicant: TENCENT AMERICA LLC

    Inventor： Han GAO ,  Xin ZHAO ,  Liang ZHAO ,  Shan LIU

    IPC: H04N19/109 ,  H04N19/137 ,  H04N19/174 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

    CPC classification number: H04N19/109 ,  H04N19/137 ,  H04N19/174 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

    Abstract: The various embodiments described herein include methods and systems for coding video. In one aspect, a method includes obtaining encoded video data comprising a plurality of blocks and parsing the encoded video data for each block in the plurality of blocks without reconstructing an entire motion vector predictor (MVP) list. The method also includes first determining whether warped motion compensation is allowed for the block and whether warped motion compensation is enabled for a first spatial neighbor block; and determining whether to perform warped motion compensation for the block during a subsequent reconstruction operation based on the first determination. The method further includes designating the block for a warp extend operation or a warp delta operation in accordance with a determination to perform warped motion compensation for the block during the subsequent reconstruction operation.

    SUBBLOCK-BASED MOTION VECTOR PREDICTOR WITH MV OFFSET DERIVED BY TEMPLATE MATCHING
    50.
    发明公开
    SUBBLOCK-BASED MOTION VECTOR PREDICTOR WITH MV OFFSET DERIVED BY TEMPLATE MATCHING 审中-公开

    公开(公告)号：US20230421751A1

    公开(公告)日：2023-12-28

    申请号：US17983866

    申请日：2022-11-09

    Applicant: Tencent America LLC

    Inventor： Xin ZHAO ,  Lien-Fei CHEN ,  Han GAO ,  Guichun LI ,  Shan LIU

    IPC: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/513

    CPC classification number: H04N19/105 ,  H04N19/521 ,  H04N19/176 ,  H04N19/139

    Abstract: A coded video bitstream comprising a current block in a current picture is received. The current block includes a plurality of subblocks and is to be predicted by a subblock-based template matching motion vector prediction (SbTMVP) mode. A respective collocated reference subblock for each subblock is determined based on a combination of a displacement vector (DV) and a motion vector offset (MVO) that are associated with the respective subblock. A motion vector (MV) field in the respective collocated reference subblock of each subblock in the current block is determined. A respective reference template for each subblock is derived based on the determined MV field of the collocated reference subblock. The plurality of subblocks of the current block is reconstructed by predicting each subblock using the respective reference template in the SbTMVP mode.

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