DECODER-SIDE CONTROL POINT MOTION VECTOR REFINEMENT FOR AFFINE INTER-PREDICTION IN VIDEO CODING

    公开(公告)号:US20240121399A1

    公开(公告)日:2024-04-11

    申请号:US18476931

    申请日:2023-09-28

    CPC classification number: H04N19/139 H04N19/176 H04N19/517

    Abstract: An example device for decoding video data includes a memory configured to store video data; and a processing system comprising one or more processors implemented in circuitry, the processing system being configured to: refine a first control point motion vector (CPMV) of a current block of the video data using a first decoder-side motion vector refinement (DMVR) process to form a first refined CPMV for the current block; refine a second CPMV of the current block of video data using a second DMVR process, independently of the first DMVR process, to form a second refined CPMV for the current block; form a prediction block for the current block using the first refined CPMV and the second refined CPMV; and decode the current block using the prediction block. In some examples, the CPMVs may each be decoded using a respective merge index and a respective motion vector difference (MVD).

    BI-DIRECTIONAL OPTICAL FLOW IN VIDEO CODING

    公开(公告)号:US20220201313A1

    公开(公告)日:2022-06-23

    申请号:US17645233

    申请日:2021-12-20

    Abstract: A method of decoding video data includes determining that bi-directional optical flow (BDOF) is enabled for a block of the video data; dividing the block into a plurality of sub-blocks based on the determination that BDOF is enabled for the block, determining, for each sub-block of one or more sub-blocks of the plurality of sub-blocks, respective distortion values, determining that one of per-pixel BDOF is performed or BDOF is bypassed for each sub-block of the one or more sub-blocks of the plurality of sub-blocks based on the respective distortion values, determining prediction samples for each sub-block of the one or more sub-blocks based on the determination of per-pixel BDOF being performed or BDOF being bypassed, and reconstructing the block based on the prediction samples.

    MOTION VECTOR PREDICTION WITH MOTION INFORMATION COLLECTING BUFFER

    公开(公告)号:US20210014524A1

    公开(公告)日:2021-01-14

    申请号:US16924884

    申请日:2020-07-09

    Abstract: An example device for coding video data includes a memory configured to store video data; and one or more processors implemented in circuitry and configured to: determine that a size of a current block of the video data is less than a threshold, the current block being a two-dimensional array of samples representing a portion of a picture; determine a set of motion vector prediction candidates for the current block according to the determination that the size of the current block is less than the threshold; select a motion vector predictor of the motion vector prediction candidates for the current block; code motion information of the current block using the motion vector predictor; and code the current block using the motion information.

Patent Agency Ranking