公开(公告)号：US20170180734A1

公开(公告)日：2017-06-22

申请号：US15118064

申请日：2015-02-04

Applicant: Dolby International AB ,  Dolby Laboratories Licensing Corporation

Inventor： Guan-Ming SU ,  Qian CHEN ,  Peng YIN ,  Ralf WILLENBACHER

IPC: H04N19/139 ,  H04N19/182 ,  H04N19/105 ,  H04N19/52 ,  H04N19/513

CPC classification number: H04N19/139 ,  H04N19/105 ,  H04N19/182 ,  H04N19/30 ,  H04N19/52 ,  H04N19/521

Abstract: Pixel data of a video sequence with enhanced dynamic range (EDR) are predicted based on pixel data of a corresponding video sequence with standard dynamic range (SDR) and a piecewise inter-layer predictor. The output parameters of the piecewise predictor are computed based atleast on two sets of pre-computed values and a prediction cost criterion. The first set of pre-computed values applies to all input SDR frames and comprises a set of SDR pixel values raised to one or more integer power terms. The second set of pre-computed values is frame specific and is computed based on a histogram of an input SDR frame and pixel values of the corresponding EDR frame. The pre-computed values allow for a fast iterative algorithm to identify the best pivot points for the piecewise polynomials according to a prediction cost and to solve for the coefficients of the piecewise predictor.

公开(公告)号：US20160366422A1

公开(公告)日：2016-12-15

申请号：US15118083

申请日：2015-02-19

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Peng YIN ,  Guan-Ming SU ,  Taoran LU ,  Tao CHEN ,  Walter J. HUSAK

IPC: H04N19/167 ,  H04L12/26 ,  H04N19/17 ,  H04N19/182 ,  H04N19/60 ,  H04N19/124 ,  H04N19/70 ,  H04N19/117

CPC classification number: H04N19/167 ,  H04L43/16 ,  H04N19/117 ,  H04N19/124 ,  H04N19/132 ,  H04N19/17 ,  H04N19/182 ,  H04N19/649 ,  H04N19/70

Abstract: Sample data and metadata related to spatial regions in images may be received from a coded video signal. It is determined whether specific spatial regions in the images correspond to a specific region of luminance levels. In response to determining the specific spatial regions correspond to the specific region of luminance levels, signal processing and video compression operations are performed on sets of samples in the specific spatial regions. The signal processing and video compression operations are at least partially dependent on the specific region of luminance levels.

Abstract translation: 可以从编码的视频信号接收与图像中的空间区域相关的样本数据和元数据。 确定图像中的特定空间区域是否对应于亮度级别的特定区域。 响应于确定对应于亮度级的特定区域的特定空间区域，对特定空间区域中的样本集执行信号处理和视频压缩操作。 信号处理和视频压缩操作至少部分地依赖于亮度水平的特定区域。

公开(公告)号：US20160088304A1

公开(公告)日：2016-03-24

申请号：US14960295

申请日：2015-12-04

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Taoran LU ,  Peng YIN ,  Yuwen HE

IPC: H04N19/187 ,  H04N19/50 ,  H04N19/103 ,  H04N19/172 ,  H04N19/30

CPC classification number: H04N19/187 ,  H04N19/103 ,  H04N19/117 ,  H04N19/12 ,  H04N19/132 ,  H04N19/156 ,  H04N19/172 ,  H04N19/30 ,  H04N19/50

Abstract: A multi-layer video system has a first layer encoder that encodes a first layer of video information, at least one second layer encoder that encodes at least one second layer of video information, and an encoder side reference processing unit (RPU) that estimates one or more of an optimal filter or an optimal process that applies on a reference picture that is reconstructed from the first video information layer, and processes a current picture of the second video information layer, based on a correlation between the first layer reconstructed reference picture. The correlation relates to a complexity characteristic that scaleably corresponds to the first video information layer reconstructed reference picture and the second video information layer current picture. A scalable video bitstream is outputted, which may be decoded by a compatible decoder. A decoder side RPU and the encoder side RPU function as an RPU pair.

Abstract translation: 多层视频系统具有对第一层视频信息进行编码的第一层编码器，至少一个编码至少一层第二层视频信息的第二层编码器，以及估计一个视频信号的编码器侧参考处理单元（RPU） 或更多的最佳滤波器或最佳处理，其适用于从第一视频信息层重建的参考图像，并且基于第一层重构参考图像之间的相关性处理第二视频信息层的当前图像。 相关性涉及可扩展地对应于第一视频信息层重构参考图像和第二视频信息层当前图像的复杂度特性。 输出可分级视频比特流，其可以由兼容解码器解码。 解码器侧RPU和编码器侧RPU作为RPU对。

公开(公告)号：US20140341305A1

公开(公告)日：2014-11-20

申请号：US14364979

申请日：2012-12-18

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Sheng QU ,  Peng YIN ,  Yan YE ,  Yuwen HE ,  Walter GISH ,  Guan-Ming SU ,  Yufei YUAN ,  Samir HULYALKAR

IPC: H04N19/30 ,  H04N19/98 ,  H04N19/70

CPC classification number: H04N19/70 ,  H04L69/22 ,  H04N19/159 ,  H04N19/30 ,  H04N19/50 ,  H04N19/597 ,  H04N19/98

Abstract: Coding syntaxes in compliance with same or different VDR specifications may be signaled by upstream coding devices such as VDR encoders to downstream coding devices such as VDR decoders in a common vehicle in the form of RPU data units. VDR coding operations and operational parameters may be specified as sequence level, frame level, or partition level syntax elements in a coding syntax. Syntax elements in a coding syntax may be coded directly in one or more current RPU data units under a current RPU ID, predicted from other partitions/segments/ranges previously sent with the same current RPU ID, or predicted from other frame level or sequence level syntax elements previously sent with a previous RPU ID. A downstream device may perform decoding operations on multi-layered input image data based on received coding syntaxes to construct VDR images.

Abstract translation: 符合相同或不同VDR规范的编码语法可以由上游编码设备（例如VDR编码器）以RPU数据单元的形式发送到诸如公用车辆中的VDR解码器的下游编码设备。 VDR编码操作和操作参数可以被指定为编码语法中的序列级别，帧级别或分区级语法元素。 编码语法中的语法元素可以直接在当前RPU ID中的一个或多个当前RPU数据单元中编码，该当前RPU ID是从先前以相同的当前RPU ID发送的其他分区/段/范围预测的，或者从其他帧级或序列级预测的 先前使用以前的RPU ID发送的语法元素。 下游设备可以基于接收的编码语法对多层输入图像数据执行解码操作，以构建VDR图像。