公开(公告)号：US09924171B2

公开(公告)日：2018-03-20

申请号：US15280822

申请日：2016-09-29

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Guan-Ming Su ,  Sheng Qu ,  Samir N. Hulyalkar ,  Tao Chen ,  Walter C. Gish ,  Hubert Koepfer

IPC: H04N19/103 ,  H04N19/124 ,  H04N19/98 ,  H04N19/30 ,  H04N19/126

CPC classification number: H04N19/124 ,  H04N19/103 ,  H04N19/126 ,  H04N19/142 ,  H04N19/187 ,  H04N19/30 ,  H04N19/98

Abstract: Techniques use multiple lower bit depth (e.g., 8 bits) codecs to provide higher bit depth (e.g., 12+ bits) high dynamic range images from an upstream device to a downstream device. Multiple layers comprising a base layer and one or more enhancement layers may be used to carry video signals comprising image data compressed by lower bit depth encoders to a downstream device, wherein the base layer cannot be decoded and viewed on its own. Lower bit depth input image data to base layer processing may be generated from higher bit depth high dynamic range input image data via advanced quantization to minimize the volume of image data to be carried by enhancement layer video signals. The image data in the enhancement layer video signals may comprise residual values, quantization parameters, and mapping parameters based in part on a prediction method corresponding to a specific method used in the advanced quantization. Adaptive dynamic range adaptation techniques take into consideration special transition effects, such as fade-in and fade-outs, for improved coding performance.

公开(公告)号：US09497456B2

公开(公告)日：2016-11-15

申请号：US14351647

申请日：2012-11-01

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Guan-Ming Su ,  Sheng Qu ,  Samir N. Hulyalkar ,  Tao Chen ,  Walter C. Gish ,  Hubert Koepfer

IPC: H04N19/126 ,  H04N19/30 ,  H04N19/124 ,  H04N19/103 ,  H04N19/98

CPC classification number: H04N19/124 ,  H04N19/103 ,  H04N19/126 ,  H04N19/142 ,  H04N19/187 ,  H04N19/30 ,  H04N19/98

Abstract: Techniques use multiple lower bit depth codecs to provide higher bit depth, high dynamic range, images from an upstream device to a downstream device. A base layer and one or more enhancement layers may be used to carry video signals, wherein the base layer cannot be decoded and viewed on its own. Lower bit depth input image data to base layer processing may be generated from higher bit depth high dynamic range input image data via advanced quantization to minimize the volume of image data to be carried by enhancement layer video signals. The image data in the enhancement layer video signals may comprise residual values, quantization parameters, and mapping parameters based in part on a prediction method corresponding to a specific method used in the advanced quantization. Adaptive dynamic range adaptation techniques take into consideration special transition effects, such as fade-in and fade-outs, for improved coding performance.

Abstract translation: 技术使用多个较低位深度编解码器来提供更高的位深度，高动态范围，从上游设备到下游设备的图像。 基本层和一个或多个增强层可用于承载视频信号，其中基本层不能自己解码和观看。 低位深度输入图像数据到基层处理可以通过高级量化从较高位深度高动态范围输入图像数据生成，以最小化由增强层视频信号承载的图像数据的体积。 增强层视频信号中的图像数据可以部分地基于对应于高级量化中使用的特定方法的预测方法而包括残差值，量化参数和映射参数。 自适应动态范围适应技术考虑到特殊的过渡效应，如淡入和淡出，以提高编码性能。

公开(公告)号：US09357197B2

公开(公告)日：2016-05-31

申请号：US13891997

申请日：2013-05-10

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao Chen ,  Samir N. Hulyalkar

IPC: H04N13/00 ,  H04N15/00 ,  H04N19/597 ,  H04N19/33

CPC classification number: H04N13/161 ,  H04N19/33 ,  H04N19/597

Abstract: A sequence of enhanced dynamic range (EDR) images and a sequence of standard dynamic range images are encoded using a backwards-compatible SDR high-definition (HD) base layer and one or more enhancement layers. The EDR and SDR video signals may be of the same resolution (e.g., HD) or at different resolutions (e.g., 4K and HD) and are encoded using a dual-view-dual-layer (DVDL) encoder to generate a coded base layer (BL) and a coded enhancement layer (EL). The DVDL encoder includes a reference processing unit (RPU) which is adapted to compute a reference stream based on the coded BL stream. The RPU operations include post-processing, normalization, inverse normalization, and image registration. Decoders for decoding the coded BL and EL streams to generate a backwards compatible 2D SDR stream and additional 2D or 3D SDR or EDR streams, are also described.

Abstract translation: 增强动态范围（EDR）图像和一系列标准动态范围图像的序列使用向后兼容的SDR高清（HD）基础层和一个或多个增强层进行编码。 EDR和SDR视频信号可以具有相同的分辨率（例如HD）或不同分辨率（例如，4K和HD），并且使用双视图双层（DVDL）编码器进行编码，以生成编码的基本层 （BL）和编码增强层（EL）。 DVDL编码器包括参考处理单元（RPU），该参考处理单元适于基于编码的BL流来计算参考流。 RPU操作包括后处理，归一化，反归一化和映像注册。 还描述了用于解码编码的BL和EL流以生成向后兼容的2D SDR流和附加的2D或3D SDR或EDR流的解码器。

公开(公告)号：US09049445B2

公开(公告)日：2015-06-02

申请号：US14368640

申请日：2012-12-13

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Tao Chen ,  Hariharan Ganapathy-Kathirvelu ,  Samir N. Hulyalkar ,  Gopi Lakshminarayanan

IPC: H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04N19/172 ,  H04N7/01 ,  H04N13/00 ,  H04N19/30 ,  H04N19/112 ,  H04N19/187 ,  H04N19/85 ,  H04N19/59 ,  H04N19/34 ,  H04N19/597

CPC classification number: H04N19/172 ,  H04N7/012 ,  H04N13/139 ,  H04N13/161 ,  H04N19/112 ,  H04N19/187 ,  H04N19/30 ,  H04N19/34 ,  H04N19/59 ,  H04N19/597 ,  H04N19/85

Abstract: Given an input progressive sequence, a video encoder creates a dual-layer stream that combines a backwards-compatible interlaced video stream layer with an enhancement layer to reconstruct full-resolution progressive video. Given two consecutive frames in the input progressive sequence, vertical processing generates a top field-bottom field (TFBF) frame in a base layer (BL) TFBF sequence, and horizontal processing generates a side-by-side (SBS) frame in an enhancement layer (EL) SBS video sequence. The BL TFBF and the EL SBS sequences are compressed together to create a coded, backwards compatible output stream.

Abstract translation: 给定输入逐行序列，视频编码器创建将后向兼容隔行视频流层与增强层相结合的双层流，以重建全分辨率逐行视频。 给定输入渐进序列中的两个连续的帧，垂直处理在基本层（BL）TFBF序列中生成顶部场下场（TFBF）帧，并且水平处理在增强中生成并排（SBS）帧 层（EL）SBS视频序列。 BL TFBF和EL SBS序列被压缩在一起以创建编码的向后兼容的输出流。

公开(公告)号：US20140327821A1

公开(公告)日：2014-11-06

申请号：US14261652

申请日：2014-04-25

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao Chen ,  Samir N. Hulyalkar

IPC: H04N19/98 ,  H04N19/44

CPC classification number: H04N19/44 ,  H04N19/36

Abstract: Methods and systems for image processing and delivery of higher dynamic range cinema content are disclosed. A digital cinema signal with a lower dynamic range is obtained from a digital cinema signal with a higher dynamic range, for example through mapping. The lower dynamic range digital cinema signal is encoded and decoded at the transmitting end. The decoded lower dynamic range digital cinema signal is normalized to produce a set of normalization parameters which enable the mapping process at the receiving end to produce a final image with higher dynamic range that is of a higher quality. Alternatively, the higher dynamic range digital cinema signal is also encoded and decoded at the transmitting end, to produce a set of normalization parameters which enable the mapping process at the receiving end to produce a final image with higher dynamic range that is of a higher quality.

Abstract translation: 公开了用于图像处理和递送更高动态范围的电影内容的方法和系统。 具有较低动态范围的数字影院信号从具有较高动态范围的数字影院信号获得，例如通过映射。 较低的动态范围数字影院信号在发送端进行编码和解码。 经解码的较低动态范围数字电影信号被归一化以产生一组归一化参数，这使得接收端的映射处理能够产生具有更高质量的较高动态范围的最终图像。 或者，较高动态范围的数字影院信号也在发送端进行编码和解码，以产生一组归一化参数，使得接收端的映射处理能够产生具有更高质量的较高动态范围的最终图像 。

公开(公告)号：US08866975B1

公开(公告)日：2014-10-21

申请号：US14261652

申请日：2014-04-25

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Tao Chen ,  Samir N. Hulyalkar

IPC: H04N9/74 ,  G06F11/00 ,  H04N19/98 ,  H04N19/44

CPC classification number: H04N19/44 ,  H04N19/36

Abstract: Methods and systems for image processing and delivery of higher dynamic range cinema content are disclosed. A digital cinema signal with a lower dynamic range is obtained from a digital cinema signal with a higher dynamic range, for example through mapping. The lower dynamic range digital cinema signal is encoded and decoded at the transmitting end. The decoded lower dynamic range digital cinema signal is normalized to produce a set of normalization parameters which enable the mapping process at the receiving end to produce a final image with higher dynamic range that is of a higher quality. Alternatively, the higher dynamic range digital cinema signal is also encoded and decoded at the transmitting end, to produce a set of normalization parameters which enable the mapping process at the receiving end to produce a final image with higher dynamic range that is of a higher quality.

Abstract translation: 公开了用于图像处理和递送更高动态范围的电影内容的方法和系统。 具有较低动态范围的数字影院信号从具有较高动态范围的数字影院信号获得，例如通过映射。 较低的动态范围数字影院信号在发送端进行编码和解码。 经解码的较低动态范围数字电影信号被归一化以产生一组归一化参数，这使得接收端的映射处理能够产生具有更高质量的较高动态范围的最终图像。 或者，较高动态范围的数字影院信号也在发送端进行编码和解码，以产生一组归一化参数，使得接收端的映射处理能够产生具有更高质量的较高动态范围的最终图像 。