Arris Enterprises LLC

General Instrument Corporation

Google Inc.

Motorola Mobility LLC

Motorola Corporation

Arris Technology, Inc.

Google Technology Holdings LLC

General Instrument Corporaiton

Andrew Wireless Systems Gmbh

General Instrument Corporation of Delaware

Ajay K Luthra

David M Baylon

Koohyar Minoo

Limin Wang

Krit Panusopone

Mandayam A Narasimhan

Arjun Ramamurthy

Yue Yu

Zhouye Gu

Praveen N Moorthy

Rajeev Gandhi

Mark Steven Schmidt

Robert Owen Eifrig

Paul Moroney

Michael Andrew Grossman

Haifeng Xu

Xuemin Chen

Baozhou Li

Xue Hai Fang

Jae Hoon Kim

Jian Zhou

Siu-Wai Wu

Jian Lou

Robert S Nemiroff

Thomas L Du Breuil

Vincent C Liu

Glen Peter Goffin, Ii

Wade Keith Wan

Paul Andrew Clancy

Yinqing Zhao

Kevin S Wirick

James Ronald Flesch

Chanchal Chatterjee

Kun-Pei P Chen

Vincent Hok Liu

Wei-Ying Kung

Joseph Mehr

Jing Wu

Keith J Kelley

Ganesh Rajan

Mark K Schmidt

Vivian Kung

Tom Du Breuil

Robert O Elfrig

Xue Fang

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.

System for coding high dynamic range and wide color gamut sequences

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.

System and method for reshaping and adaptation of high dynamic range video data

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.

System and method for reducing blocking artifacts and providing improved coding efficiency

A sampling filter process is provided for scalable video coding. The process provides for re-sampling using video data obtained from an encoder or decoder process of a base layer (BL) in a multi-layer system using adaptive phase shifting to improve quality in Scalable High efficiency Video Coding (SHVC). In order to compensate for phase offsets introduced by downsampling an appropriate phase offset adjustment is made for upsampling in SHVC with an appropriate offset included for proper luma/chroma color space positions. In one approach the luma/chroma phase offset is specified and a filter is selected to apply the appropriate phase change.

Re-sampling with phase offset adjustment for luma and chroma to select filters in scalable video coding

A program map table in a transport stream comprising an elementary stream identifier indicating a particular elementary stream, a high dynamic range flag indicating the presence or absence of high dynamic range content within the elementary stream, and a wide color gamut flag indicating the presence or absence of wide color gamut content within the elementary stream.

Signaling high dynamic range and wide color gamut content in transport streams

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.

System and method for deblocking HDR content

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.

Single layer high dynamic range coding with standard dynamic range backward compatibility

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 wherein L is a luminance value, c, c, c, and mare parameters with fixed values, and mis a parameter with a variable value, adapting the perceptual quantizer function by adjusting the value of the mparameter 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 mparameter to the decoder for each luminance value range in the coding level.

Adaptive perceptual mapping and signaling for video coding

In one embodiment, a method determines an encoded plurality of layers for a scalable video stream for a video where each of the plurality of layers includes a respective layer parameter setting. An additional layer for the plurality of layers is determined where the additional layer enhances a base layer in the plurality of layers and the respective layer parameter settings for the encoded plurality of layers do not take into account the additional layer. The method then determines an additional layer parameter setting for the additional layer. The additional layer parameter setting specifies a relationship between the additional layer and at least a portion of the plurality of layers where the additional layer parameter setting is used to decode the additional layer and the at least a portion of the plurality of layers.

Signaling for addition or removal of layers in video coding

Methods and systems for a content server to select sets of video streams having different encoding parameters for transmitting the sets of video streams to a media device are disclosed herein. In some embodiments, a method for transmitting video streams for a media program from a server to a media device includes: selecting, by the server, first encoding parameters including a first bitrate for a first set of video streams for the media program based on a first estimated bandwidth capacity for a network linking the server and the media device, transmitting the first set of video streams from the server to the media device, determining, by the server, second encoding parameters including a second bitrate for a second set of video streams for the media program, and transmitting the second set of video streams from the server to the media device.

Methods and devices for efficient adaptive bitrate streaming

A method provides for delivering video content from a server to a plurality of media devices is disclosed that distributes accurately excess bandwidth. The method includes: determining, by the server, the bandwidth to allocate to each of the plurality of media devices using a hypertext transfer protocol-based live streaming client model or a need parameter vector and/or measured bandwidth limitations associated with each of the plurality of media devices and providing the allocated bandwidth to each of the plurality of media devices, wherein the video content is transmitted in a plurality of segments from the server, and wherein each segment is transmitted at a bitrate that may vary from segment to segment.

Excess bitrate distribution based on quality gain in SABR server

Growing community of inventors

San Diego, CA, United States of America

Ajay K Luthra