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    Method and apparatus of error handling for video coding using intra block copy mode
    211.
    发明授权
    Method and apparatus of error handling for video coding using intra block copy mode 有权

    公开(公告)号：US10356438B2

    公开(公告)日：2019-07-16

    申请号：US15578191

    申请日：2016-06-03

    Applicant: MEDIATEK INC.

    Inventor： Tzu-Der Chuang ,  Chia-Yun Cheng ,  Han-Liang Chou ,  Ching-Yeh Chen ,  Yu-Chen Sun ,  Yu-Wen Huang

    IPC: H04N19/593 ,  H04N19/563 ,  H04N19/513 ,  H04N19/70

    Abstract: In order to overcome the issue caused by a decoded block vector (BV) pointing to a reference block overlapping with an unavailable area, various methods are disclosed. According to one method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by padding from neighboring available pixels. The padding can be done in the horizontal direction and then the vertical direction. The padding may also done in the vertical direction first and then horizontal direction. In another method, if the reference block overlaps with an unavailable area, the reference pixels in the unavailable area are generated for IntraBC prediction of the current block by using previous decoded pixels in the unavailable area. A pre-defined value may also be used for the unavailable area.

    System and method for content adaptive clipping
    212.
    发明授权
    System and method for content adaptive clipping 有权

    公开(公告)号：US10291921B2

    公开(公告)日：2019-05-14

    申请号：US15238415

    申请日：2016-08-16

    Applicant: MediaTek Inc.

    Inventor： Chih-Ming Fu ,  Ching-Yeh Chen ,  Yu-Wen Huang

    IPC: H04N19/182 ,  H04N5/21 ,  H04N19/70 ,  H04N19/46 ,  H04N19/61 ,  H04N19/14 ,  H04N19/82 ,  H04N19/86 ,  H04N19/186 ,  H04N19/44 ,  H04N19/625 ,  H04N19/91 ,  H04N5/217

    Abstract: A system and method of content adaptive pixel intensity processing are described. The method includes receiving a predefined set of processed video data configured from the processed video data, deriving a range information associated with an original maximum value and an original minimum value for a predefined set of original video data, wherein the predefined set of processed video data is derived from the predefined set of original video data, and adaptively clipping pixel intensity of the predefined set of processed video data to a range deriving from the range information, wherein the range information is incorporated in a bitstream and represented in a form of the original maximum value and the original minimum value, prediction values associated with a reference maximum value and a reference minimum value, or a range index associated with a predefined range set.

    Method of cross color intra prediction
    213.
    发明授权
    Method of cross color intra prediction 有权

    公开(公告)号：US10154268B2

    公开(公告)日：2018-12-11

    申请号：US15632481

    申请日：2017-06-26

    Applicant: MEDIATEK INC.

    Inventor： Ching-Yeh Chen ,  Chih-Wei Hsu ,  Chia-Yang Tsai ,  Yu-Wen Huang

    IPC: H04N19/11 ,  H04N19/00 ,  H04N19/59 ,  H04N19/593 ,  H04N19/186 ,  H04N19/182 ,  H04N19/597 ,  H04N19/159 ,  H04N19/82

    Abstract: In one implementation, a method operates by receiving neighboring reconstructed first-color pixels and current reconstructed first-color pixels of a current first-color block and receiving neighboring reconstructed second-color pixels of a current second-color block collocated with the current first-color block. The method then determines linear model (LM) parameters according to a linear model for one or more LM Intra modes. The method then receives input data associated with current second-color pixels of the current second-color block and generates a cross-color Intra predictor from the current reconstructed first-color pixels of the current first-color block using the LM parameters associated with a LM Intra mode selected from said one or more LM Intra modes. Finally, the method applies cross-color Intra prediction encoding or decoding to the current second-color pixels of the current second-color block using the cross-color Intra predictor for the selected LM Intra mode.

    SUB-PREDICTION UNIT TEMPORAL MOTION VECTOR PREDICTION (SUB-PU TMVP) FOR VIDEO CODING
    216.
    发明申请
    SUB-PREDICTION UNIT TEMPORAL MOTION VECTOR PREDICTION (SUB-PU TMVP) FOR VIDEO CODING 审中-公开

    公开(公告)号：US20180288430A1

    公开(公告)日：2018-10-04

    申请号：US15940248

    申请日：2018-03-29

    Applicant: MEDIATEK INC.

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

    IPC: H04N19/51 ,  H04N19/176 ,  G06F17/30

    Abstract: Aspects of the disclosure provide a video coding method for processing a current prediction unit (PU) with a sub-PU temporal motion vector prediction (TMVP) mode. The method can include receiving the current PU including sub-PUs, determining an initial motion vector that is a motion vector of a spatial neighboring block of the current PU, performing a searching process to search for a main collocated picture in a sequence of reference pictures of the current PU based on the initial motion vector, and obtaining collocated motion information in the main collocated picture for the sub-PUs of the current PU. The searching process can include turning on motion vector scaling operation for searching a subset of the sequence of reference pictures, and turning off the motion vector scaling operation for searching the other reference pictures in the sequence of reference pictures.

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