Thomson Licensing

Harmonic, Inc.

Other

Thomson Multimedia S.a.

Nextream S.a.

Xavier Ducloux

Patrice Alexandre

Ludovic Noblet

Patrick Gendron

Philippe Guillotel

Yannick Olivier

Claude Perron

Anne Lorette

Alain Sorin

Khaled Jerbi

Frederic Pasquier

Patrick Dumenil

Bihong Huang

Christophe Lejus

Michel Guillotin

Darya Khaustova

Pierre Ruellou

Ronan Poullaouec

Thierry Lorand

Gildas Guelou

Approaches for generating dynamic over-the-top (OTT) adjustable bit rate (ABR) representations of a video with a variable resolution and/or frame rate using on-the-fly (OTF) transcoding and assistance metadata. At an encoder located at a head-end, the encoder encodes a video stream at an initial bit rate and produces optimum representation (OpRep) metadata, which describes an optimum presentation for the video stream for each of a plurality of bit rates or the minimum bitrate below which a presentation becomes sub-optimal. The head-end transmits the encoded video stream and the OpRep metadata to a transcoder of a Content Delivery Network (CDN). The transcoder at the CDN uses the OpRep metadata to dynamically transcode the video stream in a preferred picture resolution and a preferred frame rate at a different bit rate than the initial bit rate using the OpRep metadata.

Assistance metadata for production of dynamic Over-The-Top (OTT) adjustable bit rate (ABR) representations using On-The-Fly (OTF) transcoding

A video server comprising an input port configured to receive from a user terminal requests to deliver video segments in a target representation. The server comprises an output port configured to deliver the requested video segments to the user terminal. The server comprises a data link configured to retrieve from storage capabilities, for each request from the user terminal, a video segment in at least one source representation in an Open GOP scheme. The server comprises an access to one or more video transcoding capabilities. The video server is configured to cause one or more video transcoding capabilities to transcode at least a part of the video segment in at least one source representation in an Open GOP scheme into the requested target representation in a Closed GOP scheme when the requested target representation is different from a representation previously provided to the user terminal.

Multi representation edge server with enhanced open-GOP compression

The present invention concerns a method for dynamically adapting the lossy encoding of an audio and/or video stream () transmitted by a first device () to a remote device (), said method comprising the following steps: the remote device () receives and decodes said stream (), called the incoming stream, and transmits an outgoing stream () having at least one indicator relating to a state of said remote device () that is modified by the execution of the decoding of the incoming stream (); the first device () receives the outgoing stream (), extracts said at least one indicator therefrom and adapts the encoding of the incoming stream () according to said at least one extracted indicator. The method can be applied notably to video conferences conducted on the basis of self-powered terminals for the purpose of maintaining the operating period of these terminals.

Method for dynamically adapting the encoding of an audio and/or video stream transmitted to a device

Method of adaptive broadcasting of multimedia data streams Foriginating from a service provider (), during a download between a reception terminal () and a server (), as a function of an energy criterion, comprising the following steps:  

Method of adaptive broadcasting of multimedia streams by using an energy index

The invention relates to a method for coding a sequence of images, comprising the following steps:

Method and device for coding

The method is characterized in that the step for selecting a coding mode from the inter modes and from the intra modes is broken down into two sequential steps, a step for preselecting the intra coding mode for preselecting an intra mode for the current macroblock from the intra coding modes, and a coding decision step, part of the effective coding of the current macroblock for selecting the mode of coding the current macroblock from the inter modes and the preselected intra mode and in that the preselection step for the current macroblock is carried out during the coding decision step for a preceding macroblock.

Method and device for coding a video picture in inter or intra mode

The invention relates to a device for double pass encoding of a video data stream comprising: According to the invention,

Device and method for double-pass encoding of a video data stream

Image sequences are advantageously recoded based on an evaluation of complexities before and after trans-coding of the images. Initially, information is extracted representing at least the complexity of recoding each image. A complexity ratio is calculated in accordance with the complexities of images recoded previously using the aforementioned mode to the complexities of the initial coding of said images. After smoothing the complexity ratio undergoes updating. Each image is recoded according to the mode by estimating the complexity of each image to be recoded as the product of the complexity of the initial coding of the image by the smoothed complexity ratio for the mode.

Device and method for recoding a video data stream

The invention relates to a device for coding video frame sequences, comprising According to the invention, the means () for coding the frames as a frame structure or as a field structure are able to choose the field or frame structure dynamically as a function of the measurements of spatial and temporal activity of the said frame.

Device and method for coding video data

The present invention relates to a method and a device for monitoring the quality of video data having to undergo coding and decoding, making it possible to maintain predetermined constant quality of the video data after decoding. The method is such that information representing the complexity of video data to be coded is received from at least one coder. For each video-data item to be coded, a reference quantization value is calculated as a function of the complexity. For each video-data item to be coded, a reference throughput calculated as a function of the reference quantization value and of the value of the predetermined constant quality is calculated and transmitted to the coder, allowing the coder to code each video data item so as to obtain video data at the predetermined quality, after decoding.

Method and device for controlling the quality of video data

The process implements a global regulation at the level of a horizontal band of the image, band consisting of panels, an encoder being assigned to each panel, as a function of a preset bit rate for the band and on the basis of a single Video Buffering Verifier (VBV) taking into account the state of the buffer memories of the encoders of the band.

Process and device for the video coding of high definition images

A block based signal compression system, as for example for coding video signal, and employing quantization of codewords or transform coefficients includes circuitry for adaptively controlling the quantization. Adaptivity of quantization is made a function of several parameters. One parameter is coding cost or bandwidth, wherein coding cost is generated on a macroblock basis but averaged over a window of macroblocks centered on a macroblock currently to be quantized. Another parameter is block or macroblock motion attributes, wherein block motion attribut values are used to modify the quantizing function.

Growing community of inventors

Rennes, France

Xavier Ducloux