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    SINGLE-CHANNEL INVERSE MAPPING FOR IMAGE/VIDEO PROCESSING
    51.
    发明申请
    SINGLE-CHANNEL INVERSE MAPPING FOR IMAGE/VIDEO PROCESSING 审中-公开

    公开(公告)号：US20200169742A1

    公开(公告)日：2020-05-28

    申请号：US16630520

    申请日：2018-07-24

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Guan-Ming SU ,  Tao CHEN ,  Qian CHEN

    IPC: H04N19/30 ,  H04N19/186 ,  H04N19/70 ,  H04N19/169

    Abstract: In some embodiments, an encoder device is disclosed to generate single-channel standard dynamic range/high dynamic range content predictors. The device receives a standard dynamic range image content and a representation of a high dynamic range image content. The device determines a first mapping function to map the standard dynamic range image content to the high dynamic range image content. The device generates a single channel prediction metadata based on the first mapping function, such that a decoder device can subsequently render a predicted high dynamic range image content by applying the metadata to transform the standard dynamic range image content to the predicted high definition image content.

    CHROMA RESHAPING OF HDR VIDEO SIGNALS
    53.
    发明申请
    CHROMA RESHAPING OF HDR VIDEO SIGNALS 审中-公开

    公开(公告)号：US20190124367A1

    公开(公告)日：2019-04-25

    申请号：US16091078

    申请日：2017-05-09

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Taoran LU ,  Fangjun PU ,  Peng YIN ,  Tao CHEN

    IPC: H04N19/98 ,  H04N19/186 ,  H04N19/85

    CPC classification number: H04N19/98 ,  H04N19/117 ,  H04N19/186 ,  H04N19/46 ,  H04N19/85

    Abstract: Methods for the chroma reshaping of high-dynamic range (HDR) signals are presented. For each input pixel, a first scaler is generated based on the pixel luminance and a luma-based chroma reshaping (LCR) function. A second scaler is generated based on a saturation-based chroma reshaping (SCR) function and the saturation value of the pixel. A cascaded scaler is generated by multiplying the first scaler with the second scaler. Reshaped chroma values are generated by multiplying the input chroma values with the cascaded scaler. The characteristics of preferred LCR and SCR functions are discussed. Inverse decoding methods based on chroma-reshaping metadata that define the LCR and SCR functions are also described.

    Layer Decomposition in Hierarchical VDR Coding
    56.
    发明申请
    Layer Decomposition in Hierarchical VDR Coding 有权
    层次分解VDR编码中的层分解

    公开(公告)号：US20170019670A1

    公开(公告)日：2017-01-19

    申请号：US15280822

    申请日：2016-09-29

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Guan-Ming SU ,  Sheng QU ,  Samir N. HULYALKAR ,  Tao CHEN ,  Walter C. GISH ,  Hubert KOEPFER

    IPC: H04N19/124 ,  H04N19/103

    CPC classification number: H04N19/124 ,  H04N19/103 ,  H04N19/126 ,  H04N19/142 ,  H04N19/187 ,  H04N19/30 ,  H04N19/98

    Abstract: Techniques use multiple lower bit depth (e.g., 8 bits) codecs to provide higher bit depth (e.g., 12+ bits) high dynamic range images from an upstream device to a downstream device. Multiple layers comprising a base layer and one or more enhancement layers may be used to carry video signals comprising image data compressed by lower bit depth encoders to a downstream device, wherein the base layer cannot be decoded and viewed on its own. Lower bit depth input image data to base layer processing may be generated from higher bit depth high dynamic range input image data via advanced quantization to minimize the volume of image data to be carried by enhancement layer video signals. The image data in the enhancement layer video signals may comprise residual values, quantization parameters, and mapping parameters based in part on a prediction method corresponding to a specific method used in the advanced quantization. Adaptive dynamic range adaptation techniques take into consideration special transition effects, such as fade-in and fade-outs, for improved coding performance.

    Abstract translation: 技术使用多个较低位深度（例如，8位）编解码器来从上游设备向下游设备提供较高的比特深度（例如，12+比特）高动态范围图像。 包括基层和一个或多个增强层的多层可以用于将包括由下位深度编码器压缩的图像数据的视频信号携带到下游设备，其中基本层不能自己解码和观看。 低位深度输入图像数据到基层处理可以通过高级量化从较高位深度高动态范围输入图像数据生成，以最小化由增强层视频信号承载的图像数据的体积。 增强层视频信号中的图像数据可以部分地基于对应于高级量化中使用的特定方法的预测方法而包括残差值，量化参数和映射参数。 自适应动态范围适应技术考虑到特殊的过渡效应，如淡入和淡出，以提高编码性能。

    Display Management for High Dynamic Range Video
    58.
    发明申请
    Display Management for High Dynamic Range Video 审中-公开
    高动态范围视频显示管理

    公开(公告)号：US20160005349A1

    公开(公告)日：2016-01-07

    申请号：US14767249

    申请日：2014-02-13

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Robin ATKINS ,  Timo KUNKEL ,  Thaddeus BEIER ,  Tao CHEN

    IPC: G09G3/20 ,  G06T5/20 ,  G06T7/00

    CPC classification number: G09G3/2003 ,  G06T5/007 ,  G06T5/20 ,  G06T7/13 ,  G06T2207/10024 ,  G06T2207/20016 ,  G06T2207/20208 ,  G09G2340/06 ,  H04N5/20 ,  H04N9/67 ,  H04N9/68

    Abstract: 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.

    Abstract translation: 显示管理处理器接收具有增强的动态范围的输入图像，以显示在具有与参考显示不同的动态范围的目标显示器上。 输入图像首先被转换成感知校正的IPT颜色空间。 非线性映射函数通过将来自参考动态范围的输入信号的强度映射到目标动态范围来生成第一音调映射信号。 第一音调映射信号的强度（I）分量被锐化以保留细节，并且调整颜色（P和T）分量的饱和度以产生第二色调映射输出图像。 将色域映射函数应用于第二色调映射输出图像，以产生适于在目标显示器上显示的图像。 显示管理流水线也可以根据特定的显示模式调整显示图像的强度和颜色分量。

    SYSTEMS AND METHODS FOR APPEARANCE MAPPING FOR COMPOSITING OVERLAY GRAPHICS
    59.
    发明申请
    SYSTEMS AND METHODS FOR APPEARANCE MAPPING FOR COMPOSITING OVERLAY GRAPHICS 审中-公开
    用于组合覆盖图形的外观映射的系统和方法

    公开(公告)号：US20160005201A1

    公开(公告)日：2016-01-07

    申请号：US14768345

    申请日：2014-01-27

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Timo KUNKEL ,  Ning XU ,  Tao CHEN ,  Bongsun LEE ,  Samir N. HULYALKAR

    IPC: G06T11/60 ,  G06T7/40 ,  G06K9/52 ,  G06K9/62 ,  G06K9/46

    CPC classification number: G06T11/60 ,  G06F3/1454 ,  G06K9/4652 ,  G06K9/4661 ,  G06K9/52 ,  G06K9/6201 ,  G06T7/90 ,  G09G2320/08 ,  G09G2360/144 ,  H04N5/58 ,  H04N9/67 ,  H04N21/4122 ,  H04N21/42202 ,  H04N21/4318

    Abstract: Systems and methods for overlaying a second image/video data onto a first image/video data are described herein. The first image/video data may be intended to be rendered on a display with certain characteristics—e.g., HDR, EDR, VDR or UHD capabilities. The second image/video data may comprise graphics, closed captioning, text, advertisement—or any data that may be desired to be overlaid and/or composited onto the first image/video data. The second image/video data may be appearance mapped according to the image statistics and/or characteristics of the first image/video data. In addition, such appearance mapping may be made according to the characteristics of the display that the composite data is to be rendered. Such appearance mapping is desired to render a composite data that is visually pleasing to a viewer, rendered upon a desired display.

    Abstract translation: 这里描述了用于将第二图像/视频数据覆盖到第一图像/视频数据上的系统和方法。 第一图像/视频数据可能意图在具有特定特征的显示器上呈现，例如HDR，EDR，VDR或UHD能力。 第二图像/视频数据可以包括图形，隐藏字幕，文本，广告或可能希望被覆盖和/或合成到第一图像/视频数据上的任何数据。 第二图像/视频数据可以根据第一图像/视频数据的图像统计和/或特征进行外观映射。 另外，这样的外观映射也可以根据显示器的特性进行复合数据的呈现。 期望这样的外观映射来呈现视觉上令观看者欣赏到在期望的显示上呈现的复合数据。

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