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    VIDEO INTRA PREDICTION USING HYBRID RECURSIVE FILTERS
    1.
    发明申请
    VIDEO INTRA PREDICTION USING HYBRID RECURSIVE FILTERS 有权

    公开(公告)号：US20230016033A1

    公开(公告)日：2023-01-19

    申请号：US17934934

    申请日：2022-09-23

    Applicant: QUALCOMM Incorporated

    Inventor： Amir Said ,  Xin Zhao ,  Wei-Jung Chien ,  Jianle Chen ,  Marta Karczewicz

    IPC: H04N19/61 ,  H04N19/117 ,  H04N19/82 ,  H04N19/593 ,  H04N19/10 ,  H04N19/192 ,  H04N19/436 ,  H04N19/615 ,  H04N19/70 ,  H04N19/80 ,  H04N19/91

    Abstract: An example method of decoding video data includes obtaining, from a coded video bitstream and for a current block of the video data, an indication of an intra-prediction mode that identifies an initial predictive block; filtering, in parallel, samples in a current line of a plurality of lines of the initial predictive block based on filtered values of samples in a preceding line of the plurality of lines and unfiltered values of samples in the current line to generate filtered values for samples for the current line; and reconstructing, using intra prediction, values of samples of the current block based on the filtered values of the samples of the current initial predictive block and residual data for the current block that represents a difference between the filtered values of the samples of the current initial predictive block and the values of samples of the current block.

    Intra prediction in video coding
    2.
    发明授权
    Intra prediction in video coding 有权

    公开(公告)号：US11470330B2

    公开(公告)日：2022-10-11

    申请号：US17006518

    申请日：2020-08-28

    Applicant: Qualcomm Incorporated

    Inventor： Kai Zhang ,  Jianle Chen ,  Xin Zhao ,  Marta Karczewicz

    IPC: H04N19/159 ,  H04N19/593 ,  H04N19/109 ,  H04N19/11 ,  H04N19/176 ,  H04N19/186 ,  H04N19/70

    Abstract: An apparatus configured to encode or decode video data that includes a reference picture memory configured to store a plurality of reconstructed samples associated with a first row of a first block of video data and at least one processor, in communication with the reference picture memory, that is configured to generate a plurality of predicted samples associated with a second row of a second block based on a cascading technique where the cascading technique includes utilization of an angle associated with a first angular intra-prediction mode to generate the plurality of predicted samples associated with the second row of the second block and to encode or decode the second block based on the plurality of predicted samples associated with the second row.

    Memory reduction for non-separable transforms
    5.
    发明授权
    Memory reduction for non-separable transforms 有权

    公开(公告)号：US11134272B2

    公开(公告)日：2021-09-28

    申请号：US16020511

    申请日：2018-06-27

    Applicant: QUALCOMM Incorporated

    Inventor： Xin Zhao ,  Vadim Seregin ,  Amir Said ,  Marta Karczewicz

    IPC: H04N19/61 ,  H04N19/176 ,  H04N19/50 ,  H04N19/18 ,  H04N19/12 ,  H04N19/42 ,  H04N19/60

    Abstract: Techniques are described in which a decoder is configured to receive an input data block and apply an inverse non-separable transform to at least part of the input data block to generate an inverse non-separable transform output coefficient block. The applying the inverse non-separable transform comprises assigning a window, assigning a weight for each position inside the assigned window, and determining the inverse non-separable transform output coefficient block based on the assigned weights. The decoder is further configured to forming a decoded video block based on the determined inverse non-separable transform output coefficient block, wherein forming the decoded video block comprises summing the residual video block with one or more predictive blocks.

    Coding video data using derived chroma mode
    6.
    发明授权
    Coding video data using derived chroma mode 有权

    公开(公告)号：US11025903B2

    公开(公告)日：2021-06-01

    申请号：US15868821

    申请日：2018-01-11

    Applicant: QUALCOMM Incorporated

    Inventor： Li Zhang ,  Wei-Jung Chien ,  Xin Zhao ,  Marta Karczewicz

    IPC: H04N19/103 ,  H04N19/593 ,  H04N19/136 ,  H04N19/186 ,  H04N19/157 ,  H04N19/11

    Abstract: An example device for decoding video data includes a memory for storing video data, and one or more processors implemented in circuitry and configured to construct an intra-prediction candidate list for a current chroma block of the video data indicating candidate intra-prediction modes for the current chroma block, wherein the intra-prediction candidate list indicates a subset of allowed luminance (luma) candidate intra-prediction modes, determine cost (e.g., sum of absolute transform difference (SATD)) values for each of the candidate intra-prediction modes in the intra-prediction candidate list for the current chroma block, and generate a prediction block for the current chroma block using one of the candidate intra-prediction modes indicated by the intra-prediction candidate list according to the cost values (e.g., the candidate intra-prediction mode having the lowest cost value).

    INTRA FILTERING FLAG IN VIDEO CODING
    8.
    发明申请
    INTRA FILTERING FLAG IN VIDEO CODING 审中-公开

    公开(公告)号：US20200021818A1

    公开(公告)日：2020-01-16

    申请号：US16577938

    申请日：2019-09-20

    Applicant: QUALCOMM Incorporated

    Inventor： Vadim Seregin ,  Marta Karczewicz ,  Xin Zhao

    IPC: H04N19/159 ,  H04N19/61 ,  H04N19/82 ,  H04N19/126

    Abstract: A method of decoding video data including, receiving a first block of video data, receiving a first syntax element indicating if a coding mode is to be used for the first block of video data in the case that the first block of video data is associated with a number of non-zero transform coefficients greater than or equal to a threshold, explicitly decoding a value of the received first syntax element, and applying the coding mode to the first block of video data in accordance with a value of the first syntax element.

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