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    Merge candidates with multiple hypothesis
    41.
    发明授权
    Merge candidates with multiple hypothesis 有权

    公开(公告)号：US11051010B2

    公开(公告)日：2021-06-29

    申请号：US16513835

    申请日：2019-07-17

    Applicant: MediaTek Inc.

    Inventor： Man-Shu Chiang ,  Chih-Wei Hsu

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

    Abstract: A video decoder receives to-be-decoded data from a bitstream for a block of pixels to be decoded as a current block of a current picture of the video. The video decoder generates a first prediction of the current block based on a first prediction mode that is selected from a first candidate list. The video decoder generates a second prediction of the current block based on a second prediction mode that is selected from a second candidate list. The video decoder generates a combined prediction for the current block based on the first prediction and the second prediction. The video decoder reconstructs the current block by using the combined prediction.

    Signaling Multiple Transmission Selection
    43.
    发明申请
    Signaling Multiple Transmission Selection 有权

    公开(公告)号：US20210160541A1

    公开(公告)日：2021-05-27

    申请号：US17105573

    申请日：2020-11-26

    Applicant: MediaTek Inc.

    Inventor： Man-Shu Chiang ,  Chih-Wei Hsu ,  Tzu-Der Chuang ,  Ching-Yeh Chen

    IPC: H04N19/625 ,  H04N19/176

    Abstract: A method for multiple transform selection (MTS) is provided. A video decoder receives data from a bitstream for a block of pixels to be decoded as a current block of a current picture of a video. The decoder sets a zero-out indication based on one or more non-zero coefficient indications of subblocks of the current block. When the zero-out indication indicates that a zero-out region has no non-zero coefficient, the decoder parses the bitstream for an MTS index. When the zero-out indication indicates that the zero-out region has at least one non-zero coefficient, the decoder sets the MTS index to a default value without parsing the MTS index from the bitstream. The decoder selects a transform mode according to the MTS index for the current block. The decoder reconstructs the current block by using the selected transform mode.

    Adaptive implicit transform setting
    44.
    发明授权
    Adaptive implicit transform setting 有权

    公开(公告)号：US10999604B2

    公开(公告)日：2021-05-04

    申请号：US16382173

    申请日：2019-04-11

    Applicant: MediaTek Inc.

    Inventor： Man-Shu Chiang ,  Chih-Wei Hsu

    IPC: H04N19/61 ,  H04N19/52 ,  H04N19/159 ,  H04N19/176

    Abstract: A video coder that implicitly signals or decides transform settings based on intra prediction settings is provided. The video coder receives input data associated with a current block. The video coder determines a current intra prediction mode for the current block and maps the current intra prediction mode to a target transform mode. In one example, the video coder encodes the current block by performing a transform operation according to the target transform mode on the prediction residuals of the current block generated according to the current intra prediction mode. In another example, the video coder decodes the current block by performing an inverse transform operation according to the target transform mode on the coded prediction residuals of the current block, in which the coded prediction residuals is derived from the bitstream and is generated according to the current intra prediction mode.

    Method and apparatus of bilateral template MV refinement for video coding
    45.
    发明授权
    Method and apparatus of bilateral template MV refinement for video coding 有权

    公开(公告)号：US10911761B2

    公开(公告)日：2021-02-02

    申请号：US16473328

    申请日：2017-12-26

    Applicant: MEDIATEK INC.

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

    IPC: H04N19/176 ,  H04N19/105 ,  H04N19/139 ,  H04N19/573 ,  H04N19/577

    Abstract: Method and apparatus of using Bilateral Template MV Refinement are disclosed to improve coding efficiency or reducing complexity. According to one method, if a size associated with the current block is greater than a threshold, then Bilateral Template MV Refinement is applied to the current block. Otherwise, the Bilateral Template MV Refinement is not applied to the current block. In another method, the Bilateral Template MV Refinement is turned on or off implicitly based on the two reference blocks. According to yet another method, the Bilateral Template MV Refinement is performed on the sub-block level. According to yet another method, the Bilateral Template MV Refinement is performed motion vectors selected from candidates of AMVP (advance MV prediction) candidate list. According to yet another method, the Bilateral Template MV Refinement used a modified template to refine motion vector.

    Interaction Between Core Transform And Secondary Transform
    46.
    发明申请
    Interaction Between Core Transform And Secondary Transform 审中-公开

    公开(公告)号：US20200322623A1

    公开(公告)日：2020-10-08

    申请号：US16836904

    申请日：2020-03-31

    Applicant: MediaTek Inc.

    Inventor： Man-Shu Chiang ,  Chih-Wei Hsu

    IPC: H04N19/46 ,  H04N19/105 ,  H04N19/119 ,  H04N19/132 ,  H04N19/625 ,  H04N19/159 ,  H04N19/176

    Abstract: A video decoder receives data from a bitstream for a block of pixels to be decoded as a current block of a current picture of a video. The video decoder receives from the bitstream first and second signaled indices for the current block. The video decoder determines first and second merge indices from the first and second signaled indices. The video decoder uses the first and second merge indices to select first and second motion candidates, respectively. The video decoder generates a set of prediction samples in ALWIP mode and performs an inverse secondary transform and an inverse primary transform to generate a set of residual samples of the current block. Enabling or selection of secondary transform and/or primary transform depends on size, width, and/or height for the current block. The video decoder reconstructs the current block by using the set of residual samples and the set of prediction samples.

    Signaling For Multi-Reference Line Prediction And Multi-Hypothesis Prediction
    48.
    发明申请
    Signaling For Multi-Reference Line Prediction And Multi-Hypothesis Prediction 审中-公开

    公开(公告)号：US20200169757A1

    公开(公告)日：2020-05-28

    申请号：US16691454

    申请日：2019-11-21

    Applicant: MediaTek Inc.

    Inventor： Man-Shu Chiang ,  Chih-Wei Hsu ,  Ching-Yeh Chen

    IPC: H04N19/70 ,  H04N19/103 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182

    Abstract: A video codec receives data for a block of pixels to be encoded or decoded as a current block of a current picture of a video. The video codec signals or parses a first syntax element for a first coding mode in a particular set of two or more coding modes. Each of coding mode of the particular set of coding modes modifies a merge candidate or an inter-prediction that is generated based on the merge candidate. The video codec enables the first coding mode and disables one or more other coding modes in the particular set of coding modes. The disabled one or more coding modes in the particular set of coding modes are disabled without parsing syntax elements for the disabled coding modes. The video codec encodes or decodes the current block by using the enabled first coding mode and bypassing the disabled coding modes.

    Method and apparatus of decoder side motion derivation for video coding
    49.
    发明授权
    Method and apparatus of decoder side motion derivation for video coding 有权

    公开(公告)号：US10511835B2

    公开(公告)日：2019-12-17

    申请号：US15754721

    申请日：2016-09-02

    Applicant: MEDIATEK INC.

    Inventor： Tzu-Der Chuang ,  Ching-Yeh Chen ,  Chih-Wei Hsu ,  Yu-Wen Huang ,  Jian-Liang Lin ,  Yu-Chen Sun ,  Yu-Ting Shen

    IPC: H04N19/105 ,  H04N19/52 ,  H04N19/176 ,  H04N19/567 ,  H04N19/57

    Abstract: Method and apparatus of video coding using decoder derived motion information based on bilateral matching or template matching are disclosed. According to one method, an initial motion vector (MV) index is signalled in a video bitstream at an encoder side or determined from the video bitstream at a decoder side. A selected MV is then derived using bilateral matching, template matching or both to refine an initial MV associated with the initial MV index. In another method, when both MVs for list 0 and list 1 exist in template matching, the smallest-cost MV between the two MVs may be used for uni-prediction template matching if the cost is lower than the bi-prediction template matching. According to yet another method, the refinement of the MV search is dependent on the block size. According to yet another method, merge candidate MV pair is always used for bilateral matching or template matching.

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