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    Intra prediction for 360-degree video
    31.
    发明授权
    Intra prediction for 360-degree video 有权

    公开(公告)号：US10764605B2

    公开(公告)日：2020-09-01

    申请号：US16271065

    申请日：2019-02-08

    Applicant: QUALCOMM Incorporated

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

    IPC: H04N19/597 ,  H04N19/593 ,  H04N19/176 ,  H04N19/105 ,  H04N5/232 ,  H04N19/11

    Abstract: A video coder may determine reference samples based on a location of a current block of a current picture of the 360-degree video data and a packing arrangement that defines an arrangement of a plurality of regions in the current picture. The current picture is in a projected domain and each respective region of the plurality of regions is a respective face defined by a projection of 360-degree video data. The regions are arranged in the current picture according to the packing arrangement. Based on the location of the current block being at a border of the first region that is adjacent to the second region and there being a discontinuity at the border due to the packing arrangement, the reference samples are samples of the current picture that spatially neighbor the current block in a spherical domain and not in the projected domain.

    Motion compensation for cubemap packed frames
    32.
    发明授权
    Motion compensation for cubemap packed frames 有权

    公开(公告)号：US10721465B2

    公开(公告)日：2020-07-21

    申请号：US16274889

    申请日：2019-02-13

    Applicant: QUALCOMM Incorporated

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

    IPC: H04N19/105 ,  H04N19/513 ,  H04N19/563 ,  H04N19/176 ,  H04N19/159 ,  H04N19/46 ,  H04N19/70 ,  H04N19/597

    Abstract: A device for decoding 360-degree video data is configured to store a decoded picture of 360-degree video as a reference frame; derive an extended reference frame from the stored reference frame based on a padding amount by extending a first cube face in the reference frame; inter-predict a block of a current picture from a block of the extended reference frame by determining a motion vector for the block of the current picture; in response to a determination that the motion vector points to a cube face in the extended reference frame other than the first cube face, clipping the motion vector such that the motion vector points to a location in the first cube face; and locating a prediction block for a current block using the clipped motion vector.

    POSITION DEPENDENT INTRA PREDICTION COMBINATION WITH MULTIPLE REFERENCE LINES FOR INTRA PREDICTION
    34.
    发明申请
    POSITION DEPENDENT INTRA PREDICTION COMBINATION WITH MULTIPLE REFERENCE LINES FOR INTRA PREDICTION 审中-公开

    公开(公告)号：US20200007870A1

    公开(公告)日：2020-01-02

    申请号：US16434113

    申请日：2019-06-06

    Applicant: QUALCOMM Incorporated

    Inventor： Adarsh Krishnan RAMASUBRAMONIAN ,  Geert Van der Auwera ,  Marta KARCZEWICZ

    IPC: H04N19/174 ,  H04N19/176 ,  H04N19/11 ,  H04N19/70 ,  H04N19/61

    Abstract: Techniques are described using Position Dependent Intra Prediction Combination (PDPC) and multiple reference lines. For example, a video coder (e.g., an encoder and/or decoder) can predict an initial prediction sample value for a sample of a current block using an intra-prediction mode. The initial prediction sample value can be predicted from a first neighboring block and/or a second neighboring block of the current block. One or more reference sample values can be determined from at least one line of multiple lines of reference samples from the first neighboring block and/or the second neighboring block. At least one of the lines from the multiple lines used for determining the reference sample value(s) is not adjacent to the current block. A final prediction sample value can be determined for the sample of the current block, such as by modifying the initial prediction sample value using the one or more reference sample values.

    SIGNALING OF DEBLOCKING FILTER PARAMETERS IN VIDEO CODING
    39.
    发明申请
    SIGNALING OF DEBLOCKING FILTER PARAMETERS IN VIDEO CODING 有权
    在视频编码中消除滤波器参数的信号

    公开(公告)号：US20140369404A1

    公开(公告)日：2014-12-18

    申请号：US14473897

    申请日：2014-08-29

    Applicant: QUALCOMM Incorporated

    Inventor： Geert Van der Auwera ,  Ye-Kui Wang ,  Marta Karczewicz

    IPC: H04N19/117 ,  H04N19/174 ,  H04N19/86 ,  H04N19/70

    CPC classification number: H04N19/86 ,  H04N19/105 ,  H04N19/117 ,  H04N19/124 ,  H04N19/13 ,  H04N19/159 ,  H04N19/172 ,  H04N19/174 ,  H04N19/176 ,  H04N19/184 ,  H04N19/43 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70

    Abstract: This disclosure describes techniques for signaling deblocking filter parameters for a current slice of video data with reduced bitstream overhead. Deblocking filter parameters may be coded in one or more of a picture layer parameter set and a slice header. The techniques reduce a number of bits used to signal the deblocking filter parameters by coding a first syntax element that indicates whether deblocking filter parameters are present in both the picture layer parameter set and the slice header, and only coding a second syntax element in the slice header when both sets of deblocking filter parameters are present. Coding the second syntax element is eliminated when deblocking filter parameters are present in only one of the picture layer parameter set or the slice header. The second syntax element indicates which set of deblocking filter parameters to use to define a deblocking filter applied to a current slice.

    Abstract translation: 本公开描述了用于以减少的比特流开销为视频数据的当前切片信令去块滤波器参数的信号的技术。 去块滤波器参数可以在图像层参数集和片头中的一个或多个中被编码。 这些技术通过编码表示去块滤波器参数是否存在于图像层参数集和片头中的第一语法元素来减少用于通知去块滤波器参数的位数，并且仅对切片中的第二语法元素进行编码 当存在两组去块滤波器参数时，头部。 当去块滤波器参数仅存在于图像层参数集或片头中的一个时，消除了第二语法元素的编码。 第二个语法元素指出哪一组去块滤波器参数用于定义应用于当前片的去块滤波器。

    CHROMA SLICE-LEVEL QP OFFSET AND DEBLOCKING
    40.
    发明申请
    CHROMA SLICE-LEVEL QP OFFSET AND DEBLOCKING 有权
    CHROMA SLICE LEVEL QP OFFSET AND DEBLOCKING

    公开(公告)号：US20130259141A1

    公开(公告)日：2013-10-03

    申请号：US13826124

    申请日：2013-03-14

    Applicant: QUALCOMM INCORPORATED

    Inventor： Geert Van der Auwera ,  Xianglin Wang ,  Marta Karczewicz

    IPC: H04N7/26

    CPC classification number: H04N19/86 ,  H04N19/117 ,  H04N19/134 ,  H04N19/14 ,  H04N19/174 ,  H04N19/186 ,  H04N19/82

    Abstract: In one example, an apparatus for processing video data comprises a video coder configured to, for each of the one or more chrominance components, calculate a chrominance quantization parameter for a common edge between two blocks of video data based on a first luminance quantization parameter for the first block of video data, a second luminance quantization parameter for the second block of video data, and a chrominance quantization parameter offset value for the chrominance component. The video coder is further configured to determine a strength for a deblocking filter for the common edge based on the chrominance quantization parameter for the chrominance component, and apply the deblocking filter according to the determined strength to deblock the common edge.

    Abstract translation: 在一个示例中，用于处理视频数据的设备包括：视频编码器，被配置为，对于所述一个或多个色度分量中的每一个，基于第一亮度量化参数计算两个视频数据块之间的共同边缘的色度量化参数， 视频数据的第一块，第二视频数据块的第二亮度量化参数，以及色度分量的色度量化参数偏移值。 视频编码器还被配置为基于用于色度分量的色度量化参数来确定用于公共边缘的去块滤波器的强度，并且根据确定的强度应用去块滤波器以解除公共边缘。

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