公开(公告)号：US20150117551A1

公开(公告)日：2015-04-30

申请号：US14514597

申请日：2014-10-15

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Guan-Ming Su ,  Xi Xu ,  Sheng Qu

IPC: H04N19/65 ,  H04N19/44

CPC classification number: H04N19/65 ,  H04N19/196 ,  H04N19/23 ,  H04N19/34 ,  H04N19/44 ,  H04N19/463 ,  H04N19/503 ,  H04N19/895

Abstract: Error control in multi-stream visual dynamic range (VDR) codecs is described, including for a case of a layer-decomposed (non-backward compatible) video codecs. Error control can be provided by concealing lost and/or corrupted data in data frames of a decoded VDR bitstream prior to rendering a corresponding VDR image. Various algorithms and methods for concealing lost and/or corrupted data are provided.

Abstract translation: 描述了多流视觉动态范围（VDR）编解码器中的错误控制，包括对于层分解（非向后兼容）视频编解码器的情况。 可以通过在渲染对应的VDR图像之前隐藏解码的VDR比特流的数据帧中的丢失和/或损坏的数据来提供错误控制。 提供了用于隐藏丢失和/或损坏的数据的各种算法和方法。

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。