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    Adaptive loop filtering across raster-scan slices
    201.
    发明授权
    Adaptive loop filtering across raster-scan slices 有权

    公开(公告)号：US11432015B2

    公开(公告)日：2022-08-30

    申请号：US16921106

    申请日：2020-07-06

    Applicant: QUALCOMM Incorporated

    Inventor： Nan Hu ,  Vadim Seregin ,  Adarsh Krishnan Ramasubramonian ,  Muhammed Zeyd Coban ,  Marta Karczewicz

    IPC: H04N19/80 ,  H04N19/119 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176

    Abstract: Systems, methods, and media are provided for loop filtering across raster scan slices. One example includes obtaining data comprising one or more pictures, including obtaining a first block located in a first slice of one of the pictures. The example then includes determining a second block is located in a second slice of the picture, the second block including one or more pixels for use in performing loop filtering of a pixel of the first block, and determining that loop filtering across slice boundaries is disabled. Based on this disabling, the example determines that the one or more pixels of the second block are unavailable for performing loop filtering of the pixel of the first block, and duplicates at least one pixel of the first block or at least one pixel of an additional block of the first slice for performing loop filtering of the pixel of the first block.

    Coefficient coding for transform skip mode in video coding
    202.
    发明授权
    Coefficient coding for transform skip mode in video coding 有权

    公开(公告)号：US11381847B2

    公开(公告)日：2022-07-05

    申请号：US16886381

    申请日：2020-05-28

    Applicant: QUALCOMM Incorporated

    Inventor： Marta Karczewicz ,  Hongtao Wang ,  Muhammed Zeyd Coban ,  Yung-Hsuan Chao

    IPC: H04N19/88 ,  H04N19/124 ,  H04N19/129

    Abstract: Techniques for coding coefficients in a residual block are described. A video coder (e.g., video encoder or video decoder) may code (e.g., encode or decode), in an interleaving manner, coefficient information on a coefficient-by-coefficient basis for coefficients in a residual block of a current block of the video data in a first pass, wherein the coefficient information for a coefficient includes one or more of a significance flag indicating whether a value of the coefficient is not zero, a parity flag indicating whether the value of the coefficient is odd or even, a sign flag indicating whether the value of the coefficient is positive or negative, and one or more greater than flags indicating whether an absolute value of the coefficient is greater than respective threshold values, and after the first pass, code remainder information for coefficients in the residual block of the current block in a second pass.

    Signaling filters for video processing
    204.
    发明授权
    Signaling filters for video processing 有权

    公开(公告)号：US11356707B2

    公开(公告)日：2022-06-07

    申请号：US17024614

    申请日：2020-09-17

    Applicant: QUALCOMM Incorporated

    Inventor： Vadim Seregin ,  Muhammed Zeyd Coban ,  Marta Karczewicz

    IPC: H04N19/82 ,  H04N19/187 ,  H04N19/58

    Abstract: Systems, methods, and computer-readable storage media for signaling filters for reference picture resampling are described. One example involves obtaining an encoded video bitstream associated with the video data, identifying a current picture and at least one reference picture from the encoded video bitstream, and identifying signaling data from the encoded video bitstream for the video data, the signaling data including a partial set of coefficient data for at least one filter. A complete set of coefficients (e.g., filter coefficients) is derived for the at least one filter from the partial set of coefficient data and characteristics of the at least one filter, and the current picture is processed using the complete set of coefficients for the at least one filter.

    Block-based quantized residual domain pulse code modulation assignment for intra prediction mode derivation
    209.
    发明授权
    Block-based quantized residual domain pulse code modulation assignment for intra prediction mode derivation 有权

    公开(公告)号：US11190758B2

    公开(公告)日：2021-11-30

    申请号：US16854720

    申请日：2020-04-21

    Applicant: QUALCOMM Incorporated

    Inventor： Muhammed Zeyd Coban ,  Geert Van der Auwera ,  Marta Karczewicz

    IPC: H04N19/105 ,  H04N19/159 ,  H04N19/46 ,  H04N19/186 ,  H04N19/176

    Abstract: Techniques are described for improving video coding. For example, a first block of a picture included in an encoded video bitstream can be obtained. A second block of the picture can be determined as being coded (e.g., encoded) using a type of block-based quantized residual domain pulse code modulation (BDPCM) mode, such as vertical BDPCM mode or horizontal BDPCM mode. In the event the second block is coded using the vertical BDPCM mode, a vertical intra-prediction mode can be determined for an intra-prediction mode list for the first block. The vertical intra-prediction mode can be added to the intra-prediction mode list for the first block. In the event the second block is coded using the horizontal BDPCM mode, a horizontal intra-prediction mode can be determined for the intra-prediction mode list for the first block and the horizontal intra-prediction mode can be added to the intra-prediction mode list.

    Intra-prediction mode for screen content coding of video coding
    210.
    发明授权
    Intra-prediction mode for screen content coding of video coding 有权

    公开(公告)号：US11172200B2

    公开(公告)日：2021-11-09

    申请号：US16893200

    申请日：2020-06-04

    Applicant: QUALCOMM Incorporated

    Inventor： Marta Karczewicz ,  Yu Han ,  Muhammed Zeyd Coban ,  Yung-Hsuan Chao ,  Hongtao Wang

    IPC: H04N19/124 ,  H04N19/70 ,  H04N19/91 ,  H04N19/176 ,  H04N19/159

    Abstract: An example video decoder is configured to decode a first value for a first syntax element of a current block of video data, the first value indicating that the current block is encoded using an intra-prediction mode; after decoding the first value, decode a second value for a second syntax element of the current block, the second value indicating that the current block is encoded using intra mapping mode. In the intra mapping mode, the video decoder is configured to generate a prediction block for the current block using the intra-prediction mode and decode a residual block. To decode the residual block, the video decoder is configured to determine predictors for quantized residual values of the residual block and map decoded mapping values to the quantized residual values using the predictors. The video decoder combines the prediction block with the residual block to decode the current block.

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