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    OPTICAL FLOW BASED VIDEO INTER PREDICTION
    11.
    发明公开
    OPTICAL FLOW BASED VIDEO INTER PREDICTION 审中-实审

    公开(公告)号：EP4376410A2

    公开(公告)日：2024-05-29

    申请号：EP24167135.3

    申请日：2020-03-19

    申请人： Huawei Technologies Co., Ltd.

    发明人： SETHURAMAN, Sriram ,  A, Jeeva Raj ,  KOTECHA, Sagar

    IPC分类号： H04N19/577

    CPC分类号： H04N19/577 ,  H04N19/521

    摘要： In some embodiments, a video encoder or a video decoder obtains a pair of motion vectors for a current coding block of a video signal with respect to two reference frames. Predictions of the current block are generated using the pair of motion vectors from respective reference frames. The video encoder or video decoder further determine an optical flow for the current coding block based on samples values in the predictions. One component of the optical flow is determined based on the other component of the optical flow. Bi-predictive optical flow (BPOF) can be performed on the current coding block using the determined optical flow.

    EARLY TERMINATION FOR OPTICAL FLOW REFINEMENT
    12.
    发明公开
    EARLY TERMINATION FOR OPTICAL FLOW REFINEMENT 审中-公开

    公开(公告)号：EP4243418A2

    公开(公告)日：2023-09-13

    申请号：EP23184185.9

    申请日：2020-02-21

    申请人： Huawei Technologies Co., Ltd.

    发明人： ESENLIK, Semih ,  SETHURAMAN, Sriram ,  A, Jeeva Raj ,  KOTECHA, Sagar

    IPC分类号： H04N19/557

    摘要： It is provided a method of video coding implemented in a decoding device or an encoding device, the method comprising: obtaining initial motion vectors for a current block;
    obtaining first predictions for a sample value in the current block based on the initial motion vectors; calculating a first matching cost according to the first predictions; determining whether an optical flow refinement process should be performed or not, according to at least one preset condition, the at least one preset condition comprising a condition of whether the calculated first matching cost is equal to or larger than a threshold; and performing an optical flow refinement process for obtaining a final inter prediction for the sample value in the current block, when it is determined that the optical flow refinement process should be performed.

    EARLY TERMINATION FOR OPTICAL FLOW REFINEMENT
    13.
    发明公开
    EARLY TERMINATION FOR OPTICAL FLOW REFINEMENT 审中-公开

    公开(公告)号：EP4243418A3

    公开(公告)日：2023-10-25

    申请号：EP23184185.9

    申请日：2020-02-21

    申请人： Huawei Technologies Co., Ltd.

    发明人： ESENLIK, Semih ,  SETHURAMAN, Sriram ,  A, Jeeva Raj ,  KOTECHA, Sagar

    IPC分类号： H04N19/513 ,  H04N19/557

    摘要： It is provided a method of video coding implemented in a decoding device or an encoding device, the method comprising: obtaining initial motion vectors for a current block;
    obtaining first predictions for a sample value in the current block based on the initial motion vectors; calculating a first matching cost according to the first predictions; determining whether an optical flow refinement process should be performed or not, according to at least one preset condition, the at least one preset condition comprising a condition of whether the calculated first matching cost is equal to or larger than a threshold; and performing an optical flow refinement process for obtaining a final inter prediction for the sample value in the current block, when it is determined that the optical flow refinement process should be performed.