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    Video processing methods and apparatuses of determining motion vectors for storage in video coding systems
    1.
    发明授权
    Video processing methods and apparatuses of determining motion vectors for storage in video coding systems 有权

    公开(公告)号：US11290739B2

    公开(公告)日：2022-03-29

    申请号：US17296759

    申请日：2019-11-28

    Applicant: MEDIATEK INC.

    Inventor： Yu-Ling Hsiao ,  Ching-Yeh Chen ,  Tzu-Der Chuang ,  Chih-Wei Hsu

    IPC: H04N19/51 ,  H04N19/105 ,  H04N19/176 ,  H04N19/119

    Abstract: Video processing methods and apparatuses for coding a current block comprise receiving input data of a current block, splitting the current block into sub-blocks, deriving motion information for the sub-blocks, performing motion compensation for the sub-blocks using the motion information to derive a final predictor, deriving and storing a representative motion vector for each grid in the current block, and encoding or decoding the current block using the final predictor. The representative motion vector for grids in a weighted area is determined by combining the motion vectors of the sub-blocks if the motion vectors of the sub-blocks are in different lists. The representative motion vector for grids in the weighted area is determined as one of the motion vectors of the sub-blocks if the motion vectors of the sub-blocks are in the same list.

    Selective switch for parallel processing
    2.
    发明授权
    Selective switch for parallel processing 有权

    公开(公告)号：US11240524B2

    公开(公告)日：2022-02-01

    申请号：US17105569

    申请日：2020-11-26

    Applicant: MediaTek Inc.

    Inventor： Chun-Chia Chen ,  Yu-Ling Hsiao ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen

    IPC: H04N19/513 ,  H04N19/70 ,  H04N19/184 ,  H04N19/176

    Abstract: A video decoder determines whether the current block is coded by using intra block copy mode. The video decoder identifies a list of one or more prediction candidates for the current block. When the current block is not coded by using intra block copy mode, one or more spatial neighbors of the current block that are positioned in a same MER as the current block are excluded from the list of prediction candidates. When the current block is coded by using intra block copy mode and the list of prediction candidates belongs to a predefined subset of multiple different candidate lists, at least one of the identified prediction candidates is a spatial neighbor of the current block that is positioned in the MER. The video decoder reconstructs the current block by using a prediction candidate selected from the list of prediction candidates to generate a prediction of the current block.

    Method and apparatus of unified weight and motion indexes derivation for geometric merge mode in video coding
    4.
    发明授权
    Method and apparatus of unified weight and motion indexes derivation for geometric merge mode in video coding 有权

    公开(公告)号：US11575905B2

    公开(公告)日：2023-02-07

    申请号：US17768622

    申请日：2020-11-25

    Applicant: MEDIATEK INC.

    Inventor： Yu-Ling Hsiao ,  Chun-Chia Chen ,  Chih-Wei Hsu

    IPC: H04N19/137 ,  H04N19/176 ,  H04N19/59

    Abstract: A method and apparatus for video coding are disclosed. According to this method, a current block is received at an encoder side or compressed data comprising the current block is received at a decoder side, where the current block is partitioned into two geometric prediction units. Motion information for the two geometric prediction units is determined. Weighting information for the two geometric prediction units is determined. A motion storage type variable based on the weighting information is determined, where the motion information associated with the current block is stored according to a value of the motion storage type variable. A geometric predictor for the current block is generated by blending two geometric predictors according to the weighting information, where the two geometric predictors are derived for the two geometric prediction units using the motion information associated with the current block.

    Method and apparatus of improved merge with motion vector difference for video coding
    5.
    发明授权
    Method and apparatus of improved merge with motion vector difference for video coding 有权

    公开(公告)号：US11381838B2

    公开(公告)日：2022-07-05

    申请号：US17293674

    申请日：2019-11-15

    Applicant: MEDIATEK INC.

    Inventor： Chen-Yen Lai ,  Yu-Ling Hsiao ,  Tzu-Der Chuang ,  Ching-Yeh Chen

    IPC: H04N19/56 ,  H04N19/172 ,  H04N19/176

    Abstract: A prediction method and apparatus for video coding include a set of Merge candidates having an MMVD (Merge mode with motion vector differences (MVD)) candidate are generated. When the current block has a block size belonging to at least one default block size, whether a target candidate in the set of Merge candidates is bi-prediction is determined after the set of Merge candidates is generated. If the target candidate is bi-prediction: the target candidate is replaced by a uni-prediction candidate; the uni-prediction candidate is included in the set of Merge candidates to generate a modified set of Merge candidates; and current motion information associated with the current block is encoded using the modified set of Merge candidates at the video encoder side or the current motion information associated with the current block is decoded at the video decoder side using the modified set of Merge candidates.

    Method and apparatus of encoding or decoding video blocks by current picture referencing coding
    10.
    发明授权
    Method and apparatus of encoding or decoding video blocks by current picture referencing coding 有权

    公开(公告)号：US11252406B2

    公开(公告)日：2022-02-15

    申请号：US17291085

    申请日：2019-11-06

    Applicant: MEDIATEK INC.

    Inventor： Chen-Yen Lai ,  Yu-Ling Hsiao ,  Tzu-Der Chuang ,  Ching-Yeh Chen

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/96

    Abstract: Video processing methods comprise receiving input data of a current block in a current picture, constructing a candidate list for the current block by including one or more History-based Motion Vector Predictor (HMVP) candidates, selecting one candidate from the candidate list, locating a reference block according to motion information of the selected candidate, and encoding or decoding the current block by predicting the current block using the reference block. The one or more HMVP candidates are fetched from a normal HMVP table if the current block is to be processed by a normal inter prediction mode, and the one or more HMVP candidates are fetched form a Current Picture Referencing (CPR) HMVP table if the current block is to be processed by a CPR mode. The two HMVP tables are separately maintained and updated.

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