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    Improving processing for high-dynamic range images
    73.
    发明授权
    Improving processing for high-dynamic range images 有权

    公开(公告)号：US11025961B2

    公开(公告)日：2021-06-01

    申请号：US16532924

    申请日：2019-08-06

    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.

    Signal reshaping for high dynamic range signals
    75.
    发明授权
    Signal reshaping for high dynamic range signals 有权

    公开(公告)号：US10432977B2

    公开(公告)日：2019-10-01

    申请号：US15749231

    申请日：2016-08-03

    Applicant: Dolby Laboratories Licensing Corporation

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

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

    Rate Control Adaptation for High-Dynamic Range Images
    78.
    发明申请
    Rate Control Adaptation for High-Dynamic Range Images 审中-公开
    高动态范围图像的速率控制适配

    公开(公告)号：US20160134870A1

    公开(公告)日：2016-05-12

    申请号：US14933679

    申请日：2015-11-05

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Taoran Lu ,  Peng Yin ,  Tao Chen ,  Guan-Ming Su

    IPC: H04N19/124 ,  H04N19/186 ,  H04N19/65 ,  H04N19/172

    CPC classification number: H04N19/124 ,  H04N19/126 ,  H04N19/136 ,  H04N19/147 ,  H04N19/172 ,  H04N19/186 ,  H04N19/65

    Abstract: A high dynamic range input video signal characterized by either a gamma-based or a perceptually-quantized (PQ) source electro-optical transfer function (EOTF) is to be compressed. Given a luminance range for an image-region in the input, for a gamma-coded input signal, a rate-control adaptation method in the encoder adjusts a region-based quantization parameter (QP) so that it increases in highlight regions and decreases in dark regions, otherwise, for a PQ-coded input, the region-based QP increases in the dark areas and decreases in the highlight areas.

    Abstract translation: 要压缩以伽马或感知量化（PQ）源电光传递函数（EOTF）为特征的高动态范围输入视频信号。 给定输入中的图像区域的亮度范围，对于伽马编码的输入信号，编码器中的速率控制适配方法调整基于区域的量化参数（QP），使得其在高亮区域增加并减小 暗区域，否则，对于PQ编码的输入，基于区域的QP在暗区域增加并且在高亮区域中减小。

    INTER-LAYER REFERENCE PICTURE PROCESSING FOR CODING STANDARD SCALABILITY
    79.
    发明申请
    INTER-LAYER REFERENCE PICTURE PROCESSING FOR CODING STANDARD SCALABILITY 审中-公开
    用于编码标准可扩展性的层间参考图像处理

    公开(公告)号：US20150326865A1

    公开(公告)日：2015-11-12

    申请号：US14430793

    申请日：2013-09-24

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Peng Yin ,  Taoran Lu ,  Tao Chen

    IPC: H04N19/187 ,  H04N19/46 ,  H04N19/61 ,  H04N19/33

    CPC classification number: H04N19/187 ,  H04N19/12 ,  H04N19/33 ,  H04N19/40 ,  H04N19/46 ,  H04N19/59 ,  H04N19/61 ,  H04N19/70 ,  H04N19/85

    Abstract: Video data are coded in a coding-standard layered bit stream. Given a base layer (BL) and one or more enhancement layer (EL) signals, the BL signal is coded into a coded BL stream using a BL encoder which is compliant to a first coding standard. In response to the BL signal and the EL signal, a reference processing unit (RPU) determines RPU processing parameters. In response to the RPU processing parameters and the BL signal, the RPU generates an inter-layer reference signal. Using an EL encoder which is compliant to a second coding standard, the EL signal is coded into a coded EL stream, where the encoding of the EL signal is based at least in part on the inter-layer reference signal. Receivers with an RPU and video decoders compliant to both the first and the second coding standards may decode both the BL and the EL coded streams.

    Abstract translation: 视频数据以编码标准分层比特流编码。 给定基层（BL）和一个或多个增强层（EL）信号，使用符合第一编码标准的BL编码器将BL信号编码为编码的BL流。 响应于BL信号和EL信号，参考处理单元（RPU）确定RPU处理参数。 响应于RPU处理参数和BL信号，RPU产生层间参考信号。 使用符合第二编码标准的EL编码器，EL信号被编码成编码的EL流，其中EL信号的编码至少部分地基于层间参考信号。 具有符合第一和第二编码标准的RPU和视频解码器的接收机可以解码BL和EL编码流。

    Processing Audio or Video Signals Captured by Multiple Devices
    80.
    发明申请
    Processing Audio or Video Signals Captured by Multiple Devices 审中-公开
    处理由多个设备捕获的音频或视频信号

    公开(公告)号：US20150271619A1

    公开(公告)日：2015-09-24

    申请号：US14658565

    申请日：2015-03-16

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Xuejing Sun ,  Taoran Lu ,  Peng Yin

    IPC: H04S3/00 ,  H04N13/00

    Abstract: Embodiments of the present disclosure relate to processing audio or video signals captured by multiple devices. An apparatus for processing video and audio signals includes an estimating unit and a processing unit. The estimating unit may estimate at least one aspect of an array at least based on at least one video or audio signal captured respectively by at least one of portable devices arranged in an array. The processing unit may apply the aspect at least based on video to a process of generating a surround sound signal via the array, or apply the aspect at least based on audio to a process of generating a combined video signal via the array. With cross-referencing visual or acoustic hints, an improvement can be achieved in generating an audio or video signal.

    Abstract translation: 本公开的实施例涉及处理由多个设备捕获的音频或视频信号。 一种用于处理视频和音频信号的装置包括估计单元和处理单元。 至少基于由阵列中布置的便携式设备中的至少一个捕获的至少一个视频或音频信号，估计单元可以估计阵列的至少一个方面。 处理单元可以至少基于视频将该方面应用于经由阵列生成环绕声信号的处理，或者至少基于音频将该方面应用于经由阵列生成组合视频信号的处理。 使用交叉参考的视觉或声音提示，可以在产生音频或视频信号中实现改进。

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