公开(公告)号：WO2017053849A1

公开(公告)日：2017-03-30

申请号：PCT/US2016/053516

申请日：2016-09-23

Applicant: ARRIS ENTERPRISES LLC

Inventor： MINOO, Koohyar ,  GU, Zhouye ,  BAYLON, David M. ,  LUTHRA, Ajay ,  YU, Yue

IPC: H04N19/98 ,  H04N19/70 ,  G06T5/00

CPC classification number: H04N19/124 ,  G06T5/007 ,  G06T2207/20208 ,  H04N19/174 ,  H04N19/177 ,  H04N19/186 ,  H04N19/44 ,  H04N19/70 ,  H04N19/98

Abstract: A method for transforming high dynamic range (HDR) video data into standard dynamic range (SDR) video data and encoding the SDR video data so that the HDR video data may be recovered at the decoder includes generating a tone map describing a transformation applied to the HDR video data to generate the SDR video data. The generated tone map describes the transformation as the multiplication of each HDR pixel in the HDR video data by a scalar to generate the SDR video data. The tone map is then modeled as a reshaping transfer function and the HDR video data is processed by the reshaping transfer function to generate the SDR video data. The reshaping transfer function is then inverted and described in a self-referential metadata structure. The SDR video data is then encoded including the metadata structure defining the inverse reshaping transfer function.

Abstract translation: 一种用于将高动态范围（HDR）视频数据转换成标准动态范围（SDR）视频数据并对SDR视频数据进行编码以便可以在解码器处恢复HDR视频数据的方法包括：生成描述应用于 HDR视频数据生成SDR视频数据。 所产生的色调映射描述了将HDR图像数据中的每个HDR像素乘以标量的变换，以生成SDR视频数据。 然后将色调映射建模为重塑传递函数，并且通过重塑传递函数处理HDR视频数据以生成SDR视频数据。 然后，重塑传递函数被反转并以自引用元数据结构描述。 SDR视频数据被编码，包括定义反重整传递函数的元数据结构。

公开(公告)号：WO2016172394A1

公开(公告)日：2016-10-27

申请号：PCT/US2016/028721

申请日：2016-04-21

Applicant: ARRIS ENTERPRISES LLC

Inventor： MINOO, Koohyar ,  GU, Zhouye ,  BAYLON, David M. ,  LUTHRA, Ajay

IPC: H04N19/124 ,  H04N19/154 ,  H04N19/126 ,  H04N19/132 ,  H04N19/172 ,  H04N19/176 ,  G06T5/10 ,  G06T5/00

CPC classification number: H04N19/124 ,  H04N19/126 ,  H04N19/132 ,  H04N19/136 ,  H04N19/154 ,  H04N19/172 ,  H04N19/176 ,  H04N19/184 ,  H04N19/186 ,  H04N19/70

Abstract: A method is provided for encoding a digital video to improve perceptual quality. The method includes receiving a digital video at a video encoder, providing a perceptual quantizer function defined by Formula (I); wherein L is a luminance value, c 1 , c 2 , c 3 , and m 1 are parameters with fixed values, and m 2 is a parameter with a variable value, adapting the perceptual quantizer function by adjusting the value of the m 2 parameter based on different luminance value ranges found within a coding level of the digital video, encoding the digital video into a bitstream using, in part, the perceptual quantizer function, transmitting the bitstream to a decoder, and transmitting the value of the m 2 parameter to the decoder for each luminance value range in the coding level.

Abstract translation: 提供了一种用于对数字视频进行编码以提高感知质量的方法。 该方法包括在视频编码器处接收数字视频，提供由公式（I）定义的感知量化器功能; 其中L是亮度值，c1，c2，c3和m1是具有固定值的参数，m2是具有可变值的参数，通过基于不同亮度值范围调整m2参数的值来适应感知量化器功能 在数字视频的编码级中发现，使用部分感知量化器功能将数字视频编码为比特流，将比特流发送到解码器，并且将每个亮度值范围的m2参数的值发送到解码器 在编码层面。

公开(公告)号：WO2017053852A1

公开(公告)日：2017-03-30

申请号：PCT/US2016/053521

申请日：2016-09-23

Applicant: ARRIS ENTERPRISES LLC

Inventor： MINOO, Koohyar ,  BAYLON, David M. ,  GU, Zhouye ,  YU, Yue ,  LUTHRA, Ajay

IPC: H04N19/98 ,  H04N19/70 ,  G06T5/00

CPC classification number: H04N19/124 ,  G06T5/007 ,  G06T2207/20208 ,  H04N19/174 ,  H04N19/177 ,  H04N19/186 ,  H04N19/44 ,  H04N19/70 ,  H04N19/98

Abstract: A video data encoder generates a first metadata structure to describe one or more transfer functions to be applied by a decoder to reshape decoded video data into video data. The encoder segments a transfer function relative to P pivot points. It then allocates P cells in the metadata structure for storing the P pivot points. Each transfer function segment is fitted to a respective equation having N coefficients based on the order of the equation. The encoder allocates N+1 cells for each pivot point except for the P th pivot point and stores the number N in the first cell and the N coefficients in the remaining cells. The encoder generates a second metadata structure, associated with a video data set, that includes data identifying the transfer function to be applied to the video data set. The encoder encodes the video data including the first and second metadata structures.

Abstract translation: 视频数据编码器生成第一元数据结构以描述由解码器应用的一个或多个传送函数，以将解码的视频数据重新形成视频数据。 编码器相对于P个枢轴点分段传递函数。 然后，它将P细胞分配到用于存储P个枢轴点的元数据结构中。 每个传递函数段被拟合到具有基于等式​​的顺序的N个系数的相应等式。 编码器为除了第P个枢轴点之外的每个枢轴点分配N + 1个单元，并将数量N存储在第一单元中，并将剩余单元中的N个系数存储。 编码器生成与视频数据集相关联的第二元数据结构，其包括标识要应用于视频数据集的传递函数的数据。 编码器对包括第一和第二元数据结构的视频数据进行编码。

公开(公告)号：WO2016172395A1

公开(公告)日：2016-10-27

申请号：PCT/US2016/028722

申请日：2016-04-21

Applicant: ARRIS ENTERPRISES LLC

Inventor： MINOO, Koohyar ,  GU, Zhouye ,  BAYLON, David M. ,  LUTHRA, Ajay

IPC: H04N19/30 ,  H04N19/117 ,  H04N19/132 ,  H04N19/17 ,  H04N19/186 ,  H04N19/467 ,  H04N19/187

CPC classification number: H04N19/30 ,  H04N19/117 ,  H04N19/132 ,  H04N19/17 ,  H04N19/176 ,  H04N19/186 ,  H04N19/187 ,  H04N19/44 ,  H04N19/467

Abstract: A method is provided for encoding a digital video to provide for improved color mapping. The digital video has values in a first color space, and the method includes performing a color mapping operation on values in each sub-picture to convert the values in the first color space to values in a second, narrower, color space, wherein the color mapping operation is adapted based on the content of each sub-picture, encoding the values in the second color space into a base layer, performing a reverse color mapping operation on decoded values from the base layer in the second color space in each sub-picture to generate a reconstructed reference frame having values in the first color space, encoding values in the first color space into an enhancement layer based at least in part on the reconstructed reference frame, combining the base layer and the enhancement layer into a bitstream, sending the bitstream to a decoder, and sending one or more parameters to the decoder that describe the adaption of the reverse color mapping operation for at least some sub-pictures.

Abstract translation: 提供了一种用于对数字视频进行编码以提供改进的颜色映射的方法。 数字视频具有第一颜色空间中的值，并且该方法包括对每个子图像中的值执行颜色映射操作，以将第一颜色空间中的值转换为第二，较窄的颜色空间中的值，其中颜色 基于每个子图像的内容，将第二颜色空间中的值编码为基本层，对每个子图像中的第二颜色空间中的基底层的解码值执行反色映射操作， 以产生具有第一颜色空间中的值的重建参考帧，至少部分地基于重构的参考帧将第一颜色空间中的值编码为增强层，将基本层和增强层组合成比特流，发送 比特流到解码器，并且向解码器发送描述对于至少一些子图像的反色映射操作的适配的一个或多个参数。

公开(公告)号：WO2019070770A1

公开(公告)日：2019-04-11

申请号：PCT/US2018/054044

申请日：2018-10-02

Applicant: ARRIS ENTERPRISES LLC

Inventor： BAYLON, David M. ,  LUTHRA, Ajay

IPC: H04N19/86 ,  H04N19/82 ,  H04N19/70

Abstract: A system and method of reducing blocking artifacts and providing enhanced coding efficiency based, as least in part, upon evaluation of relative smoothness of signals at a coding boundary. In some embodiments, a boundary threshold difference can be established beyond which it is determined that the difference is representative of a natural or intended boundary and filtering can be applied to those boundaries having differences below the boundary threshold difference. In some further embodiments, the ramps of the signal across the boundary can be evaluated to determine whether weak or strong filtering might be appropriate. In some further embodiments, weak filtering can be performed that reduces blocking artifacts, improves coding efficiency, but does not distort ramp signals across the boundary.

公开(公告)号：WO2017053846A1

公开(公告)日：2017-03-30

申请号：PCT/US2016/053511

申请日：2016-09-23

Applicant: ARRIS ENTERPRISES LLC

Inventor： BAYLON, David M. ,  GU, Zhouye ,  LUTHRA, Ajay ,  MINOO, Koohyar ,  YU, Yue

IPC: H04N19/98 ,  H04N19/70 ,  G06T5/00

CPC classification number: H04N19/124 ,  G06T5/007 ,  G06T2207/20208 ,  H04N19/174 ,  H04N19/177 ,  H04N19/186 ,  H04N19/44 ,  H04N19/70 ,  H04N19/98

Abstract: A system and method for regenerating high dynamic range (HDR) video data from encoded video data, extracts, from the encoded video data, a self-referential metadata structure specifying a video data reshaping transfer function. The video data reshaping transfer function is regenerated using data from the metadata structure and the extracted reshaping transfer function is used to generate the HDR video data by applying decoded video data values to the reshaping transfer function.

Abstract translation: 从编码视频数据再生高动态范围（HDR）视频数据的系统和方法，从编码视频数据中提取指定重构传输函数的视频数据的自参照元数据结构。 使用来自元数据结构的数据再现视频数据重新转换功能，并且通过将解码的视频数据值应用于重塑传递函数，并且提取的重塑传递函数用于生成HDR视频数据。

公开(公告)号：WO2017015564A1

公开(公告)日：2017-01-26

申请号：PCT/US2016/043571

申请日：2016-07-22

Applicant: ARRIS ENTERPRISES LLC

Inventor： MINOO, Koohyar ,  GU, Zhouye ,  BAYLON, David M. ,  LUTHRA, Ajay

IPC: H04N19/172 ,  H04N19/46 ,  H04N19/117 ,  H04N19/136 ,  H04N19/36

CPC classification number: H04N19/124 ,  H04N19/117 ,  H04N19/136 ,  H04N19/172 ,  H04N19/174 ,  H04N19/179 ,  H04N19/182 ,  H04N19/186 ,  H04N19/36 ,  H04N19/46

Abstract: A method of encoding a digital video data applies adaptive pre-processing to data representing high dynamic range (HDR) and/or wide color gamut (WCG) image data prior to encoding and complementary post-processing to the data after decoding in order to allow at least partial reproduction of the HDR and/or WCG data. The example methods apply one or more color space conversions, and a perceptual transfer functions to the data prior to quantization. The example methods apply inverse perceptual transfer functions and inverse color space conversions after decoding to recover the HDR and/or WCG data. The transfer functions are adaptive so that different transfer functions may be applied to video data sets including different groups of frames, frames or processing windows in a single frame. Information on the data set and information on the applied transfer function is passed as metadata from the encoder to the decoder.

Abstract translation: 对数字视频数据进行编码的方法对编码之后的高动态范围（HDR）和/或宽色域（WCG）图像数据的数据应用自适应预处理，以便在解码之后对数据进行补充后处理，以便允许 至少部分再现HDR和/或WCG数据。 示例性方法应用一个或多个颜色空间转换，并且在量化之前将感知传递函数应用于数据。 示例性方法在解码之后应用反向感知传递函数和反色彩空间转换以恢复HDR和/或WCG数据。 传递函数是自适应的，使得不同的传递函数可以应用于包括单个帧中的不同组帧，帧或处理窗口的视频数据集。 关于数据集的信息和应用传递函数的信息作为元数据从编码器传递到解码器。

公开(公告)号：WO2019191646A1

公开(公告)日：2019-10-03

申请号：PCT/US2019/024936

申请日：2019-03-29

Applicant: ARRIS ENTERPRISES LLC

Inventor： BAYLON, David M. ,  LUTHRA, Ajay

IPC: H04N19/82 ,  H04N19/176 ,  H04N19/117 ,  H04N19/86

Abstract: A system and method for coding video in which deblocking artifacts are reduced by using modified filtering that is based, at least in part on pixel intensity associated with a coding unit, such that filtering levels are increased as pixel intensity increases. In some embodiments, an offset value or indicator of an offset value for parameters associated with deblocking filter parameters can be associated with a filtering level that is based at least in part on an intensity value.