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12 条记录 (耗时 0.012 秒)

    A METHOD AND APPARATUS OF ENCODING AND DECODING A COLOR PICTURE
    1.
    发明公开
    A METHOD AND APPARATUS OF ENCODING AND DECODING A COLOR PICTURE 审中-公开

    公开(公告)号：EP4089627A2

    公开(公告)日：2022-11-16

    申请号：EP22171742.4

    申请日：2016-01-25

    申请人： InterDigital VC Holdings, Inc.

    发明人： LASSERRE, Sebastien ,  ANDRIVON, Pierre ,  LELEANNEC, Fabrice ,  TOUZE, David

    IPC分类号： G06T5/00 ,  H04N19/186

    摘要： The present disclosure generally relates to a method and device of encoding a color picture having color components (Ec) comprising obtaining (11) a luminance component (L) and two chrominance components (C1, C2) from the color picture to be encoded. The method for encoding a color picture having color components comprising obtaining at least one chrominance component from the color picture to be encoded, characterized in that the method further comprises:
    - determining a first factor based on the value of each pixel (i) of said luminance component;
    - obtaining at least one final chrominance component by scaling said at least one chrominance component by said first factor; and
    - encoding (13) said at least one final chrominance component.

    A METHOD AND APPARATUS OF ENCODING AND DECODING A COLOR PICTURE
    7.
    发明公开
    A METHOD AND APPARATUS OF ENCODING AND DECODING A COLOR PICTURE 审中-公开

    公开(公告)号：EP4089627A3

    公开(公告)日：2022-12-28

    申请号：EP22171742.4

    申请日：2016-01-25

    申请人： InterDigital VC Holdings, Inc.

    发明人： LASSERRE, Sebastien ,  ANDRIVON, Pierre ,  LELEANNEC, Fabrice ,  TOUZE, David

    IPC分类号： G09G5/02 ,  G06T5/00 ,  H04N19/186

    摘要： The present disclosure generally relates to a method and device of encoding a color picture having color components (Ec) comprising obtaining (11) a luminance component (L) and two chrominance components (C1, C2) from the color picture to be encoded. The method for encoding a color picture having color components comprising obtaining at least one chrominance component from the color picture to be encoded, characterized in that the method further comprises:
    - determining a first factor based on the value of each pixel (i) of said luminance component;
    - obtaining at least one final chrominance component by scaling said at least one chrominance component by said first factor; and
    - encoding (13) said at least one final chrominance component.

    METHOD AND DEVICE FOR DECODING A COLOR PICTURE
    8.
    发明公开
    METHOD AND DEVICE FOR DECODING A COLOR PICTURE 审中-公开

    公开(公告)号：EP3923580A1

    公开(公告)日：2021-12-15

    申请号：EP21162256.8

    申请日：2016-01-27

    申请人： InterDigital VC Holdings, Inc.

    发明人： LASSERRE, Sebastien ,  LELEANNEC, Fabrice ,  OLIVIER, Yannick

    IPC分类号： H04N19/186 ,  H04N19/30 ,  H04N19/136 ,  G06T5/00

    摘要： The present disclosure generally relates to a device and a method of decoding a color picture from a bitstream. It comprises:
    - obtaining an expanded range luminance as a first component by applying a nonlinear dynamic expansion function to a luminance component obtained from the bitstream, wherein said nonlinear dynamic expansion function is determined depending on an inverse of a dynamic reduction function that has been applied to an original luminance component obtained when encoding the color picture;
    - obtaining a second component by calculating a square root of a difference between a value determined by the first component and another value computed as a linear combination of a multiplication product of two chrominance components and square values of the two chrominance components obtained from the bitstream; and
    - obtaining at least one color component of the color picture to be decoded at least from said second component and said two chrominance components by determining said at least one color component as a linear combination of the second component and the two chrominance components.