知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

42 records (took 0.03 seconds)

    Guided Color Transient Improvement Filtering in Video Coding
    5.
    发明申请
    Guided Color Transient Improvement Filtering in Video Coding 有权
    视频编码中的引导色彩瞬态改进滤波

    公开(公告)号：US20150319450A1

    公开(公告)日：2015-11-05

    申请号：US14748004

    申请日：2015-06-23

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Guan-Ming Su ,  Sheng Qu

    IPC: H04N19/44 ,  H04N19/80 ,  H04N19/89 ,  H04N19/117 ,  H04N19/186

    CPC classification number: H04N19/44 ,  H04N19/117 ,  H04N19/137 ,  H04N19/186 ,  H04N19/187 ,  H04N19/33 ,  H04N19/46 ,  H04N19/59 ,  H04N19/80 ,  H04N19/86 ,  H04N19/89

    Abstract: An encoder receives a target image in a standard dynamic range and a guide image in a high dynamic range, wherein both the target image and the guide image represent the same scene. A color transient improvement (CTI) filter is selected to predict a chroma component of a decoded version of the target image based on both the luma and chroma components of the target image and the guide image. The filtering coefficients for the CTI filter are computed by minimizing an error measurement (e.g., MSE) between pixel values of the decoded image and the guide image. The computed set of filtering coefficients is signaled to a receiver (e.g., as metadata). A decoder receives the coded image and the metadata, and applies the same CTI filter to the decoded image to generate an output image.

    Abstract translation: 编码器接收标准动态范围内的目标图像和高动态范围内的引导图像，其中目标图像和引导图像都表示相同的场景。 选择颜色瞬态改善（CTI）滤波器以基于目标图像和引导图像的亮度和色度分量来预测目标图像的解码版本的色度分量。 通过最小化解码图像的像素值和引导图像之间的误差测量（例如，MSE）来计算CTI滤波器的滤波系数。 所计算的滤波系数组被发送给接收机（例如，作为元数据）。 解码器接收编码图像和元数据，并将相同的CTI滤波器应用于解码图像以产生输出图像。

    Decoding and Display of High Dynamic Range Video
    6.
    发明申请
    Decoding and Display of High Dynamic Range Video 有权
    高动态范围视频的解码和显示

    公开(公告)号：US20150156469A1

    公开(公告)日：2015-06-04

    申请号：US14548906

    申请日：2014-11-20

    Applicant: Dolby Laboratories Licensing Corporation

    Inventor： Sheng Qu ,  Samir Hulyalkar

    IPC: H04N9/87 ,  G11B20/00 ,  H04N13/00 ,  H04N11/24

    CPC classification number: H04N9/8715 ,  G09G3/003 ,  G09G5/003 ,  G09G5/005 ,  G09G5/006 ,  G09G5/36 ,  G09G2340/0428 ,  G09G2340/10 ,  G09G2352/00 ,  G09G2370/04 ,  G09G2370/12 ,  H04N11/002 ,  H04N13/178 ,  H04N13/194 ,  H04N21/234327 ,  H04N21/4341 ,  H04N21/4344 ,  H04N21/43635 ,  H04N21/440227

    Abstract: Novel methods and systems for decoding and displaying enhanced dynamic range (EDR) video signals are disclosed. To accommodate legacy digital media players with constrained computational resources, compositing and display management (DM) operations are moved from a digital media player to its attached EDR display. On a video receiver, base and enhancement video layers are decoded and multiplexed together with overlay graphics into an interleaved stream. The video and graphics signals are all converted to a common format which allows metadata to be embedded in the interleaved signal as part of the least significant bits in the chroma channels. On the display, the video and the graphics are de-interleaved. After compositing and display management operations guided by the received metadata, the received graphics data are blended with the output of the DM process and the final video output is displayed on the display's panel.

    Abstract translation: 公开了用于解码和显示增强动态范围（EDR）视频信号的新方法和系统。 为了适应具有受限计算资源的传统数字媒体播放器，合成和显示管理（DM）操作从数字媒体播放器移动到其附加的EDR显示器。 在视频接收机上，将基础和增强视频层与覆盖图形一起解码和多路复用到交织流中。 视频和图形信号都被转换为通用格式，其允许将元数据嵌入交织信号中，作为色度通道中最低有效位的一部分。 在显示器上，视频和图形被解交错。 在由接收到的元数据引导的合成和显示管理操作之后，接收的图形数据与DM处理的输出混合，并且最终视频输出被显示在显示器的面板上。

    Hardware Efficient Sparse FIR Filtering in Video Codec
    7.
    发明申请
    Hardware Efficient Sparse FIR Filtering in Video Codec 有权
    视频编解码器中的硬件高效稀疏FIR滤波

    公开(公告)号：US20150092847A1

    公开(公告)日：2015-04-02

    申请号：US14488415

    申请日：2014-09-17

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

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

    IPC: H04N19/82

    CPC classification number: H04N19/33 ,  H04N19/85 ,  H04N19/86

    Abstract: In an embodiment, a control map of false contour filtering is generated for a predicted image. The predicted image is predicted from a low dynamic range image mapped from the wide dynamic range image. Based at least in part on the control map of false contour filtering and the predicted image, one or more filter parameters for a sparse finite-impulse-response (FIR) filter are determined. The sparse FIR filter is applied to filter pixel values in a portion of the predicted image based at least in part on the control map of false contour filtering. The control map of false contour filtering is encoded into a part of a multi-layer video signal that includes the low dynamic range image.

    Abstract translation: 在一个实施例中，为预测图像生成假轮廓过滤的控制图。 从宽动态范围图像映射的低动态范围图像预测预测图像。 至少部分地基于假轮廓过滤的控制图和预测图像，确定稀疏有限脉冲响应（FIR）滤波器的一个或多个滤波器参数。 稀疏FIR滤波器被应用于至少部分地基于假轮廓过滤的控制图来对预测图像的一部分中的像素值进行滤波。 假轮廓过滤的控制图被编码成包括低动态范围图像的多层视频信号的一部分。

    Piecewise Cross Color Channel Predictor
    8.
    发明申请
    Piecewise Cross Color Channel Predictor 有权
    分段交叉颜色通道预测器

    公开(公告)号：US20140369409A1

    公开(公告)日：2014-12-18

    申请号：US14370674

    申请日：2013-01-23

    Applicant: DOLBY LABORATORIES LICENSING CORPORATION

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

    IPC: H04N19/593 ,  H04N19/186 ,  H04N19/182

    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。

Patent Agency Ranking