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    System and methods for generating scene stabilized metadata
    92.
    发明授权
    System and methods for generating scene stabilized metadata 有权

    公开(公告)号：US10553255B2

    公开(公告)日：2020-02-04

    申请号：US15408262

    申请日：2017-01-17

    申请人： DOLBY LABORATORIES LICENSING CORPORATION

    发明人： Robin Atkins ,  Raymond Yeung ,  Sheng Qu

    IPC分类号： G11B27/30 ,  H04N5/268 ,  H04N5/91 ,  H04N9/82 ,  G11B27/28 ,  G11B27/34 ,  H04N5/14

    摘要： Methods and systems for generating and applying scene-stable metadata for a video data stream are disclosed herein. A video data stream is divided or partitioned into scenes and a first set of metadata may be generated for a given scene of video data. The first set of metadata may be any known metadata as a desired function of video content (e.g., luminance). The first set of metadata may be generated on a frame-by-frame basis. In one example, scene-stable metadata may be generated that may be different from the first set of metadata for the scene. The scene-stable metadata may be generated by monitoring a desired feature with the scene and may be used to keep the desired feature within an acceptable range of values. This may help to avoid noticeable and possibly objectionably visual artifacts upon rendering the video data.

    Display management for high dynamic range video
    93.
    发明授权
    Display management for high dynamic range video 有权

    公开(公告)号：US10540920B2

    公开(公告)日：2020-01-21

    申请号：US14767249

    申请日：2014-02-13

    申请人： DOLBY LABORATORIES LICENSING CORPORATION

    发明人： Robin Atkins ,  Timo Kunkel ,  Thaddeus Beier ,  Tao Chen

    IPC分类号： G09G3/20 ,  G06T5/20

    摘要： A display management processor receives an input image with enhanced dynamic range to be displayed on a target display which has a different dynamic range than a reference display. The input image is first transformed into a perceptually-corrected IPT color space. A non-linear mapping function generates a first tone-mapped signal by mapping the intensity of the input signal from the reference dynamic range into the target dynamic range. The intensity (I) component of the first tone-mapped signal is sharpened to preserve details, and the saturation of the color (P and T) components is adjusted to generate a second tone-mapped output image. A color gamut mapping function is applied to the second tone-mapped output image to generate an image suitable for display onto the target display. The display management pipeline may also be adapted to adjust the intensity and color components of the displayed image according to specially defined display modes.

    AMBIENT LIGHT-ADAPTIVE DISPLAY MANAGEMENT
    95.
    发明申请
    AMBIENT LIGHT-ADAPTIVE DISPLAY MANAGEMENT 审中-公开

    公开(公告)号：US20190304379A1

    公开(公告)日：2019-10-03

    申请号：US16345192

    申请日：2017-12-20

    申请人： Dolby Laboratories Licensing Corporation

    发明人： Jaclyn Anne Pytlarz ,  Robin Atkins ,  Gopi Lakshminarayanan ,  Hariharan Ganapathy Kathirvelu

    IPC分类号： G09G3/34

    摘要： Methods are disclosed for ambient light-adaptive display management. Given an input image, image metadata, an ambient-light signal, and parameters characterizing a target display, a processor generates an ambient-light adjustment function which maps input luminance values in a reference viewing environment to output luminance values in a target viewing environment, wherein the target viewing environment is determined based on the ambient-light signal. The ambient-light adjustment function is applied to the input image and the input metadata to generate a virtual image and new metadata. A tone-mapping function based on the new metadata and target display parameters is applied to the virtual image to generate an output image. The parameters for the target display are computed based on the ambient-light signal, global dimming metadata, and the luminance characteristics of the target display.