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    Handling nuisance in teleconference system
    51.
    发明授权
    Handling nuisance in teleconference system 有权

    公开(公告)号：US10182207B2

    公开(公告)日：2019-01-15

    申请号：US15544114

    申请日：2016-02-16

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Taoran Lu ,  Hariharan Ganapathy-Kathirvelu ,  Peng Yin ,  Glenn N. Dickins ,  Xuejing Sun

    IPC: H04N7/15 ,  H04M3/56 ,  H04N7/14 ,  H04L29/06

    Abstract: The disclosure relates to handling nuisance in teleconference system. An endpoint device (400) for use in a teleconference includes an acquiring unit (401), a judging unit (402), a controller (403) and a processing unit (404). The acquiring unit acquires a media stream for presentation in the teleconference, and receives information from another device. The information includes a first estimation on whether the media stream is a nuisance to the teleconference. As the nuisance to a teleconference, audio or video signals are perceived by users as actually not relevant to the conference session or causing unpleasant feeling or confusion. The judging unit decides whether the media stream is the nuisance at least based on the information. The controller controls the processing of the media stream to degrade or suppress the presentation of the media stream in case that the media stream is decided as the nuisance. The processing unit processes the media stream under the control of the controller.

    Piecewise cross color channel predictor
    58.
    发明授权
    Piecewise cross color channel predictor 有权
    分段交叉颜色通道预测器

    公开(公告)号：US08971408B2

    公开(公告)日：2015-03-03

    申请号：US14370674

    申请日：2013-01-23

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Guan-Ming Su ,  Sheng Qu ,  Peng Yin

    IPC: H04N7/12 ,  G06K9/36 ,  G06F11/30

    CPC classification number: H04N19/186 ,  H04N19/119 ,  H04N19/14 ,  H04N19/194 ,  H04N19/593

    Abstract: A sequence of visual dynamic range (VDR) images may be encoded using a standard dynamic range (SDR) base layer and one or more enhancement layers. A prediction image is generated by using piecewise cross-color channel prediction (PCCC), wherein a color channel in the SDR input may be segmented into two or more color channel segments and each segment is assigned its own cross-color channel predictor to derive a predicted output VDR image. PCCC prediction models may include first order, second order, or higher order parameters. Using a minimum mean-square error criterion, a closed form solution is presented for the prediction parameters for a second-order PCCC model. Algorithms for segmenting the color channels into multiple color channel segments are also presented.

    Abstract translation: 可以使用标准动态范围（SDR）基础层和一个或多个增强层对视觉动态范围（VDR）图像序列进行编码。 通过使用分段交叉色信道预测（PCCC）生成预测图像，其中SDR输入中的彩色通道可以被分割成两个或更多个颜色通道段，并且每个段被分配其自己的交叉颜色通道预测器以导出 预测输出VDR图像。 PCCC预测模型可以包括一阶，二阶或更高阶参数。 使用最小均方误差准则，给出了二阶PCCC模型的预测参数的闭合形式解。 还给出了将颜色通道分割成多个颜色通道段的算法。

    SIGNAL RESHAPING FOR HIGH DYNAMIC RANGE SIGNALS
    59.
    发明申请
    SIGNAL RESHAPING FOR HIGH DYNAMIC RANGE SIGNALS 有权

    公开(公告)号：US20250097480A1

    公开(公告)日：2025-03-20

    申请号：US18961211

    申请日：2024-11-26

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

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

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

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