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    CODING SIGNIFICANT COEFFICIENT INFORMATION IN TRANSFORM SKIP MODE
    1.
    发明公开
    CODING SIGNIFICANT COEFFICIENT INFORMATION IN TRANSFORM SKIP MODE 审中-公开

    公开(公告)号：EP3713233A1

    公开(公告)日：2020-09-23

    申请号：EP20175019.7

    申请日：2012-11-07

    申请人： QUALCOMM Incorporated

    发明人： JOSHI, Rajan Laxman ,  SOLE ROJALS, Joel ,  WANG, Xianglin ,  KARCZEWICZ, Marta ,  SEREGIN, Vadim

    IPC分类号： H04N19/12 ,  H04N19/129 ,  H04N19/156 ,  H04N19/196 ,  H04N19/436 ,  H04N19/625 ,  H04N19/70 ,  H04N19/13

    摘要： This disclosure describes techniques for coding significant coefficient information for a video block in a transform skip mode. The transform skip mode may provide a choice of a two-dimensional transform mode, a horizontal one-dimensional transform mode, a vertical one-dimensional transform mode, or a no transform mode. In other cases, the transform skip mode may provide a choice between a two- dimensional transform mode and a no transform mode. The techniques include selecting a transform skip mode for a video block, and coding significant coefficient information for the video block using a coding procedure defined based at least in part on the selected transform skip mode. Specifically, the techniques include using different coding procedures to code one or more of a position of a last non-zero coefficient and a significance map for the video block in the transform skip mode.

    METHODS AND SYSTEMS OF RESTRICTING BI-PREDICTION IN VIDEO CODING
    4.
    发明公开
    METHODS AND SYSTEMS OF RESTRICTING BI-PREDICTION IN VIDEO CODING 审中-公开

    公开(公告)号：EP3588955A1

    公开(公告)日：2020-01-01

    申请号：EP19189431.0

    申请日：2016-07-26

    申请人： Qualcomm Incorporated

    发明人： RAPAKA, Krishnakanth ,  JOSHI, Rajan Laxman ,  SEREGIN, Vadim ,  KARCZEWICZ, Marta

    IPC分类号： H04N19/159 ,  H04N19/176 ,  H04N19/593 ,  H04N19/127

    摘要： Techniques and systems are provided for encoding video data. For example, restrictions on certain prediction modes can be applied for video coding. A restriction can be imposed that prevents inter-prediction bi-prediction from being performed on video data when certain conditions are met. For example, bi-prediction restriction can be based on whether intra-block copy prediction is enabled for one or more coding units or blocks of the video data, whether a value of a syntax element indicates that one or more motion vectors are in non-integer accuracy, whether both motion vectors of a bi-prediction block are in non-integer accuracy, whether the motion vectors of a bi-prediction block are not identical and/or are not from the same reference index, or any combination thereof. If one or more of these conditions are met, the restriction on bi-prediction can be applied, preventing bi-prediction from being performed on certain coding units or blocks.

    METHOD FOR PALETTE MODE CODING
    9.
    发明授权
    METHOD FOR PALETTE MODE CODING 有权

    公开(公告)号：EP3164993B1

    公开(公告)日：2018-10-17

    申请号：EP15736769.9

    申请日：2015-06-30

    申请人： QUALCOMM Incorporated

    发明人： PU, Wei ,  JOSHI, Rajan Laxman ,  CHEN, Jianle ,  KARCZEWICZ, Marta ,  HSIEH, Cheng-Teh ,  ZOU, Feng ,  SOLE ROJALS, Joel

    IPC分类号： H04N19/593 ,  H04N19/70

    CPC分类号： H04N19/593 ,  H04N19/176 ,  H04N19/70 ,  H04N19/91

    摘要： A method for decoding video data provided in a bitstream, where the bitstream includes a coding unit (CU) coded in palette mode, includes: parsing a palette associated with the CU provided in the bitstream; parsing one or more run lengths provided in the bitstream that are associated with the CU; parsing one or more index values provided in the bitstream that associated with the CU; and parsing one or more escape pixel values provided in the bitstream that are associated with the CU. The escape pixel values may be parsed from consecutive positions in the bitstream, the consecutive positions being in the bitstream after all of the run lengths and the index values associated with the CU. The method may further include decoding the CU based on the parsed palette, parsed run lengths, parsed index values, and parsed escape values.