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    Signal reshaping for high dynamic range signals
    11.
    发明授权
    Signal reshaping for high dynamic range signals 有权

    公开(公告)号：US11582490B2

    公开(公告)日：2023-02-14

    申请号：US17234815

    申请日：2021-04-20

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Robin Atkins ,  Peng Yin ,  Taoran Lu ,  Jaclyn Anne Pytlarz

    IPC: H04N19/87 ,  H04N19/46 ,  H04N19/85 ,  H04N19/98 ,  H04N1/60

    Abstract: In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.

    Blending Images Using Mismatched Source and Display Electro-Optical Transfer Functions
    13.
    发明申请
    Blending Images Using Mismatched Source and Display Electro-Optical Transfer Functions 有权
    使用不匹配的源和显示电光转移功能混合图像

    公开(公告)号：US20160100108A1

    公开(公告)日：2016-04-07

    申请号：US14863621

    申请日：2015-09-24

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Jaclyn Anne Pytlarz ,  Robin Atkins

    IPC: H04N5/265 ,  G11B27/036

    CPC classification number: H04N5/265 ,  G06T5/009 ,  G06T5/50 ,  G06T2207/10016 ,  G09G5/026 ,  G09G5/10 ,  G09G2320/0673 ,  G09G2340/10 ,  G09G2370/20 ,  G11B27/036 ,  H04N9/76

    Abstract: Input video signals characterized by a source electro-optical transfer function (EOTF) are to be blended and displayed on a target display with a target EOTF which is different than the source EOTF. Given an input set of blending parameters, an output set of blending parameters is generated as follows. The input blending parameters are scaled by video signal metrics computed in the target EOTF to generate scaled blending parameters. The scaled blended parameters are mapped back to the source EOTF space to generate mapped blending parameters. Finally the mapped blending parameters are normalized to generate the output blending parameters. An output blended image is generating by blending the input video signals using the output blending parameters. Examples of generating the video signal metrics are also provided.

    Abstract translation: 以源电光传递函数（EOTF）为特征的输入视频信号将被混合并显示在目标显示器上，目标EOTF不同于源EOTF。 给定混合参数的输入集合，如下生成混合参数的输出集合。 通过在目标EOTF中计算的视频信号度量来缩放输入混合参数，以产生缩放的混合参数。 缩放的混合参数映射回源EOTF空间以生成映射混合参数。 最后，映射的混合参数被归一化以生成输出混合参数。 通过使用输出混合参数混合输入视频信号来产生输出混合图像。 还提供了生成视频信号度量的示例。

    Signal reshaping for high dynamic range signals
    14.
    发明授权
    Signal reshaping for high dynamic range signals 有权

    公开(公告)号：US12200271B1

    公开(公告)日：2025-01-14

    申请号：US18899400

    申请日：2024-09-27

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Robin Atkins ,  Peng Yin ,  Taoran Lu ,  Jaclyn Anne Pytlarz

    IPC: H04N19/82 ,  H04N1/60 ,  H04N19/46 ,  H04N19/85 ,  H04N19/87 ,  H04N19/98

    Abstract: In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized. HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.

    SIGNAL RESHAPING FOR HIGH DYNAMIC RANGE SIGNALS
    20.
    发明申请
    SIGNAL RESHAPING FOR HIGH DYNAMIC RANGE SIGNALS 有权

    公开(公告)号：US20230120882A1

    公开(公告)日：2023-04-20

    申请号：US17992603

    申请日：2022-11-22

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Robin Atkins ,  Peng Yin ,  Taoran Lu ,  Jaclyn Anne Pytlarz

    IPC: H04N19/87 ,  H04N19/46 ,  H04N19/98 ,  H04N19/85 ,  H04N1/60

    Abstract: In a method to improve backwards compatibility when decoding high-dynamic range images coded in a wide color gamut (WCG) space which may not be compatible with legacy color spaces, hue and/or saturation values of images in an image database are computed for both a legacy color space (say, YCbCr-gamma) and a preferred WCG color space (say, IPT-PQ). Based on a cost function, a reshaped color space is computed so that the distance between the hue values in the legacy color space and rotated hue values in the preferred color space is minimized HDR images are coded in the reshaped color space. Legacy devices can still decode standard dynamic range images assuming they are coded in the legacy color space, while updated devices can use color reshaping information to decode HDR images in the preferred color space at full dynamic range.

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