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    Efficient end-to-end single layer inverse display management coding
    81.
    发明授权
    Efficient end-to-end single layer inverse display management coding 有权

    公开(公告)号：US11288781B2

    公开(公告)日：2022-03-29

    申请号：US16623326

    申请日：2018-06-13

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Neeraj J. Gadgil ,  Guan-Ming Su ,  Tao Chen ,  Yoon Yung Lee

    IPC: G06T5/00 ,  H04N19/186 ,  H04N19/98 ,  G06T5/40

    Abstract: A standard dynamic range (SDR) image is received. Composer metadata is generated for mapping the SDR image to an enhanced dynamic range (EDR) image. The composer metadata specifies a backward reshaping mapping that is generated from SDR-EDR image pairs in a training database. The SDR-EDR image pairs comprise SDR images that do not include the SDR image and EDR images that corresponds to the SDR images. The SDR image and the composer metadata are encoded in an output SDR video signal. An EDR display operating with a receiver of the output SDR video signal is caused to render an EDR display image. The EDR display image is derived from a composed EDR image composed from the SDR image based on the composer metadata.

    Single-channel inverse mapping for image/video processing
    83.
    发明授权
    Single-channel inverse mapping for image/video processing 有权

    公开(公告)号：US10958920B2

    公开(公告)日：2021-03-23

    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 ,  H04N19/169 ,  H04N19/70

    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.

    Rate Control Adaptation for High-Dynamic Range Images
    87.
    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。

    Efficient Transcoding for Backward-Compatible Wide Dynamic Range Codec
    88.
    发明申请
    Efficient Transcoding for Backward-Compatible Wide Dynamic Range Codec 审中-公开
    用于向后兼容宽动态范围编解码器的高效转码

    公开(公告)号：US20150365688A1

    公开(公告)日：2015-12-17

    申请号：US14731656

    申请日：2015-06-05

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Guan-Ming Su ,  Tao Chen

    IPC: H04N19/40 ,  H04N19/182 ,  H04N19/11 ,  H04L29/06 ,  H04N19/124

    CPC classification number: H04N19/40 ,  H04L65/607 ,  H04N19/11 ,  H04N19/124 ,  H04N19/182 ,  H04N19/30

    Abstract: An intermediate bitstream generated by a first-stage transcoding system from an initial transmission package is received. The intermediate bitstream comprises base layer (BL) and enhancement layer (EL) signals. The combination of the BL and EL signals of the intermediate bitstream represents compressed wide dynamic range images. The BL signal of the intermediate bitstream alone represents compressed standard dynamic range images. A targeted transmission package is generated based on the intermediate bitstream. The targeted transmission package comprises BL and EL signals. The BL signal of the targeted transmission package may be directly transcoded from the BL signal of the intermediate bitstream alone.

    Abstract translation: 从初始传输包接收由第一级代码转换系统产生的中间位流。 中间比特流包括基本层（BL）和增强层（EL）信号。 中间比特流的BL和EL信号的组合表示压缩的宽动态范围图像。 中间位流的BL信号单独表示压缩的标准动态范围图像。 基于中间比特流生成目标传输包。 目标传输封装包括BL和EL信号。 目标传输包的BL信号可以直接从中间比特流的BL信号转码。

    INTER-LAYER REFERENCE PICTURE PROCESSING FOR CODING STANDARD SCALABILITY
    89.
    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。

    DUAL-LAYER FRAME-COMPATIBLE FULL-RESOLUTION STEREOSCOPIC 3D VIDEO DELIVERY
    90.
    发明申请
    DUAL-LAYER FRAME-COMPATIBLE FULL-RESOLUTION STEREOSCOPIC 3D VIDEO DELIVERY 有权
    双层框架兼容全解析立体3D视频传送

    公开(公告)号：US20140355693A1

    公开(公告)日：2014-12-04

    申请号：US14345570

    申请日：2012-09-26

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

    Inventor： Tao Chen ,  Samir N. Hulyalkar ,  Gopi Lakshminarayanan

    IPC: H04N19/186 ,  H04N13/00

    CPC classification number: H04N19/186 ,  H04N13/161 ,  H04N13/194 ,  H04N19/597

    Abstract: 3D Images may be encoded into reduced resolution image data in a base layer and enhancement layer (EL) image data in one or more enhancement layers. Different types of data compositions may be used in the EL image data. The different types of data compositions may include unfiltered full resolution image data for one or both of left eye and right eye perspectives, or unfiltered full resolution image data for a color channel, e.g., luminance channel, or unfiltered full resolution image data for selected portions of image frames, or fallback data compositions. Based on deciding factors including bitrate requirements and bandwidth constraints, different types of data compositions may be alternatively used by an upstream device to deliver the best possible 3D image data to a wide variety of downstream devices. The upstream device may inform a downstream device of specific types of data compositions with EL image data descriptors.

    Abstract translation: 3D图像可以编码成一个或多个增强层中的基本层和增强层（EL）图像数据中的降低分辨率图像数据。 可以在EL图像数据中使用不同类型的数据组合。 不同类型的数据组合可以包括用于左眼和右眼视角中的一个或两个的未过滤的全分辨率图像数据，或者用于颜色通道的未过滤的全分辨率图像数据，例如亮度通道或用于所选部分的未过滤的全分辨率图像数据 的图像帧或后备数据组合。 基于包括比特率要求和带宽约束的决定因素，不同类型的数据组合可以由上游设备替代地使用，以将最佳可能的3D图像数据传送到各种各样的下游设备。 上游设备可以向下游设备通知具有EL图像数据描述符的特定类型的数据组合。

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