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    Single layer high dynamic range coding with standard dynamic range backward compatibility
    5.
    发明授权
    Single layer high dynamic range coding with standard dynamic range backward compatibility 有权

    公开(公告)号：US11575899B2

    公开(公告)日：2023-02-07

    申请号：US17667059

    申请日：2022-02-08

    申请人： ARRIS Enterprises LLC

    发明人： Koohyar Minoo ,  Zhouye Gu ,  David M. Baylon ,  Ajay Luthra ,  Yue Yu

    IPC分类号： H04N19/124 ,  H04N19/186 ,  H04N19/44 ,  G06T5/00 ,  H04N19/98 ,  H04N19/70 ,  H04N19/174 ,  H04N19/177

    摘要： A method for transforming high dynamic range (HDR) video data into standard dynamic range (SDR) video data and encoding the SDR video data so that the HDR video data may be recovered at the decoder includes generating a tone map describing a transformation applied to the HDR video data to generate the SDR video data. The generated tone map describes the transformation as the multiplication of each HDR pixel in the HDR video data by a scalar to generate the SDR video data. The tone map is then modeled as a reshaping transfer function and the HDR video data is processed by the reshaping transfer function to generate the SDR video data. The reshaping transfer function is then inverted and described in a self-referential metadata structure. The SDR video data is then encoded including the metadata structure defining the inverse reshaping transfer function.

    SYSTEM AND METHOD FOR REDUCING BLOCKING ARTIFACTS AND PROVIDING IMPROVED CODING EFFICIENCY
    7.
    发明申请
    SYSTEM AND METHOD FOR REDUCING BLOCKING ARTIFACTS AND PROVIDING IMPROVED CODING EFFICIENCY 有权

    公开(公告)号：US20220007060A1

    公开(公告)日：2022-01-06

    申请号：US17472333

    申请日：2021-09-10

    申请人： ARRIS Enterprises LLC

    发明人： David M. Baylon ,  Ajay Luthra

    IPC分类号： H04N19/86 ,  H04N19/96 ,  H04N19/119 ,  H04N19/182 ,  H04N19/14 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

    摘要： A system and method of reducing blocking artifacts and providing enhanced coding efficiency based, as least in part, upon evaluation of relative smoothness of signals at a coding boundary. In some embodiments, a boundary threshold difference can be established beyond which it is determined that the difference is representative of a natural or intended boundary and filtering can be applied to those boundaries having differences below the boundary threshold difference. In some further embodiments, the ramps of the signal across the boundary can be evaluated to determine whether weak or strong filtering might be appropriate. In some further embodiments, weak filtering can be performed that reduces blocking artifacts, improves coding efficiency, but does not distort ramp signals across the boundary.

    System and method for reducing blocking artifacts and providing improved coding efficiency
    10.
    发明授权
    System and method for reducing blocking artifacts and providing improved coding efficiency 有权

    公开(公告)号：US10701402B2

    公开(公告)日：2020-06-30

    申请号：US16150250

    申请日：2018-10-02

    申请人： ARRIS Enterprises LLC

    发明人： David M. Baylon ,  Ajay Luthra

    IPC分类号： H04N19/14 ,  H04N19/86 ,  H04N19/96 ,  H04N19/119 ,  H04N19/182 ,  H04N19/117 ,  H04N19/176 ,  H04N19/82

    摘要： A system and method of reducing blocking artifacts and providing enhanced coding efficiency based, as least in part, upon evaluation of relative smoothness of signals at a coding boundary. In some embodiments, a boundary threshold difference can be established beyond which it is determined that the difference is representative of a natural or intended boundary and filtering can be applied to those boundaries having differences below the boundary threshold difference. In some further embodiments, the ramps of the signal across the boundary can be evaluated to determine whether weak or strong filtering might be appropriate. In some further embodiments, weak filtering can be performed that reduces blocking artifacts, improves coding efficiency, but does not distort ramp signals across the boundary.