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    COMBINED INTER AND INTRA PREDICTION
    1.
    发明申请
    COMBINED INTER AND INTRA PREDICTION 有权

    公开(公告)号：US20250119532A1

    公开(公告)日：2025-04-10

    申请号：US18987219

    申请日：2024-12-19

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Xiaoyu Xiu ,  Yuwen He ,  Jiancong Luo

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

    Abstract: Systems, methods, and instrumentalities are disclosed for a combined inter and intra prediction. A video coding device may receive a motion vector difference (MMVD) mode indication that indicates whether MMVD mode is used to generate inter prediction of a coding unit (CU). The video coding device may receive a combined inter merge/intra prediction (CIIP) indication, for example, when the MMVD mode indication indicates that MMVD mode is not used to generate the inter prediction of the CU. The video coding device may determine whether to use triangle merge mode for the CU, for example, based on the MMVD mode indication and/or the CIIP indication. On a condition that the CIIP indication indicates that CIIP is applied for the CU or the MMVD mode indication indicates that MMVD mode is used to generate the inter prediction, the video coding device may disable the triangle merge mode for the CU.

    ADAPTIVE MOTION VECTOR PRECISION FOR AFFINE MOTION MODEL BASED VIDEO CODING
    2.
    发明申请
    ADAPTIVE MOTION VECTOR PRECISION FOR AFFINE MOTION MODEL BASED VIDEO CODING 有权

    公开(公告)号：US20240380892A1

    公开(公告)日：2024-11-14

    申请号：US18782868

    申请日：2024-07-24

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Yuwen He ,  Xiaoyu Xiu ,  Yan Ye ,  Jiancong Luo

    IPC: H04N19/137 ,  H04N19/159 ,  H04N19/176 ,  H04N19/192

    Abstract: Systems and methods are described for video coding using affine motion models with adaptive precision. In an example, a block of video is encoded in a bitstream using an affine motion model, where the affine motion model is characterized by at least two motion vectors. A precision is selected for each of the motion vectors, and the selected precisions are signaled in the bitstream. In some embodiments, the precisions are signaled by including in the bitstream information that identifies one of a plurality of elements in a selected predetermined precision set. The identified element indicates the precision of each of the motion vectors that characterize the affine motion model. In some embodiments, the precision set to be used is signaled expressly in the bitstream; in other embodiments, the precision set may be inferred, e.g., from the block size, block shape or temporal layer.

    HISTORY-BASED MOTION VECTOR PREDICTION
    4.
    发明申请
    HISTORY-BASED MOTION VECTOR PREDICTION 有权

    公开(公告)号：US20250159142A1

    公开(公告)日：2025-05-15

    申请号：US19028050

    申请日：2025-01-17

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Xiaoyu Xiu ,  Yuwen He ,  Jiancong Luo

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/51

    Abstract: Systems, methods, and instrumentalities are disclosed for processing history-based motion vector prediction (HMVP). A video coding device may generate a history-based motion vector prediction (HMVP) list for a current block. The video coding device derive an HMVP candidate from a previously coded block. The HMVP candidate may include motion information associated with a neighboring block of the current block, one or more reference indices, and a bi-prediction weight index. The video coding device may add the HMVP candidate to the HMVP list for motion compensated prediction of a motion vector associated with the current block. The video coding device use one HMVP selected from the HMVP list to perform motion compensated prediction of the current block. The motion compensated prediction may be performed using the motion information associated with the neighboring block of the current block, the one or more reference indices, and the bi-prediction weight index.

    AFFINE MOTION MODEL DERIVATION METHOD
    5.
    发明申请
    AFFINE MOTION MODEL DERIVATION METHOD 有权

    公开(公告)号：US20250097429A1

    公开(公告)日：2025-03-20

    申请号：US18967158

    申请日：2024-12-03

    Applicant: InterDigital VC Holdings, Inc.

    Inventor： Jiancong Luo ,  Yuwen He ,  Wei Chen

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/149 ,  H04N19/176

    Abstract: Systems and methods are described for video coding using affine motion prediction. In an example method, motion vector gradients are determined from respective motion vectors of a plurality of neighboring sub-blocks neighboring a current block. An estimate of at least one affine parameter for the current block is determined based on the motion vector gradients. An affine motion model is determined based at least in part on the estimated affine parameter(s), and a prediction of the current block is generated using the affine motion model. The estimated parameter(s) may be used in the affine motion model itself. Alternatively, the estimated parameter(s) may be used in a prediction of the affine motion model. In some embodiments, only neighboring sub-blocks above and/or to the left of the current block are used in estimating the affine parameter(s).

    Affine motion model derivation method
    10.
    发明授权
    Affine motion model derivation method 有权

    公开(公告)号：US12200222B2

    公开(公告)日：2025-01-14

    申请号：US18521810

    申请日：2023-11-28

    Applicant: INTERDIGITAL VC HOLDINGS, INC.

    Inventor： Jiancong Luo ,  Yuwen He ,  Wei Chen

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/149 ,  H04N19/176

    Abstract: Systems and methods are described for video coding using affine motion prediction. In an example method, motion vector gradients are determined from respective motion vectors of a plurality of neighboring sub-blocks neighboring a current block. An estimate of at least one affine parameter for the current block is determined based on the motion vector gradients. An affine motion model is determined based at least in part on the estimated affine parameter(s), and a prediction of the current block is generated using the affine motion model. The estimated parameter(s) may be used in the affine motion model itself. Alternatively, the estimated parameter(s) may be used in a prediction of the affine motion model. In some embodiments, only neighboring sub-blocks above and/or to the left of the current block are used in estimating the affine parameter(s).

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