Thomson Licensing

Interdigital Vc Holdings, Inc.

Thomson Licensing S.a.

Interdigital Madison Patent Holdings, Sas

Thomson Licensing Dtv

Patrick Lopez

Philippe Bordes

Pierre Andrivon

David Touze

Franck Hiron

Philippe Salmon

Edouard Francois

Yannick Olivier

Guillaume Boisson

Vincent Demoulin

Fabrice Leleannec

Renaud Dore

Jérôme Vieron

Vincent Bottreau

Sebastien Lasserre

Samuel Guillouard

Dominique Thoreau

Gilles Straub

Patrick Fontaine

Ludovic Jeanne

Jerome Vieron

Marie-Jean Colaitis

Gwenaelle Marquant

Christophe Vincent

Thomas Schwanenberger

Ying Hai Chen

Franck Galpin

Tangi Poirier

Ying Li

Philippe Guillotel

Benoit Vandame

Paul Kerbiriou

Friedrich Heizmann

Christel Chamaret

Edouard François

Nicolas Burdin

Mehmet Turkan

Sylvain Chevreau

Helmut Buerklin

Didier Velez

Francois Cellier

Chen Ying

Jérome Vieron

Sébastien Lasserre

Charaf Hanna

Renaud Doré

Ying Chen

A method for decoding a picture block is disclosed. The decoding method comprises: decoding () at least one stream S_diff into decoded data and into one information for identifying a reconstructed reference picture in a decoder picture buffer; reconstructing () a special reference picture from at least the identified reconstructed reference picture and from the decoded data; reconstructing () the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

Coding and decoding methods of a picture block, corresponding devices and data stream

A method for decoding a picture block is disclosed. The decoding method comprises: —decoding () at least one stream S_diff into decoded data and into one information for identifying a re-constructed reference picture in a decoder picture buffer; —reconstructing () a special reference picture from at least the identified reconstructed reference picture and from the decoded data; —reconstructing () the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

Different implementations are described, particularly implementations for processing a medium dynamic range video signal are presented. In a method for processing such a video signal a medium dynamic range video signal and associated metadata are received, wherein the metadata include data representative of a peak luminance value of the medium dynamic range video signal. In addition, data representative of a peak luminance value of a presentation display are received. It is determined whether the peak luminance value of the medium dynamic range video signal is greater or lower than the peak luminance value of the presentation display. A processor is configured based on the determination, wherein the processor has a first mode to reconstruct a high dynamic range video signal based on a received standard dynamic range video signal and associated metadata, and a second mode to optimize a received high dynamic range video signal for the rendering device. The medium dynamic range video signal is processed by the processor in the first mode if the peak luminance value of the medium dynamic range video signal is smaller than the peak luminance value of the presentation display and in the second mode if the peak luminance value of the medium dynamic range video signal is greater than the peak luminance value of the presentation display.

Method and apparatus for processing a medium dynamic range video signal in SL-HDR2 format

A method for decoding a picture block is disclosed. The decoding method comprises: &#x2014;decoding () at least one stream S_diff into decoded data and into one information for identifying a reconstructed reference picture in a decoder picture buffer; &#x2014;reconstructing () a special reference picture from at least the identified reconstructed reference picture and from the decoded data; &#x2014;reconstructing () the picture block from at least the special reference picture, wherein the at least the special reference picture is not displayed.

A method for decoding a picture block is disclosed. The decoding method comprises:

A medium dynamic range video signal and associated metadata are received, wherein the metadata include data representative of a peak luminance value of the signal. The medium dynamic range video signal is processed in a first mode to reconstruct a high dynamic range video signal based on a received standard dynamic range video signal and associated metadata if the peak luminance value of the medium dynamic range video signal is smaller than the peak luminance value of a presentation display, and in a second mode to optimize a received high dynamic range video signal for a rendering device if the peak luminance value of the medium dynamic range video signal is greater than the peak luminance value of the presentation display.

A system and methods is provided for performing, by a processor, an initial tone mapping function on a first image to produce a second image. The first and second images are of different dynamic ranges. The method also includes applying, by the processor, a second tone mapping function to the second image when it contains any saturated portions. The second tone mapping function lowers luminance by a first fraction. The overall luminance of the second image is also determined and a fine tuning filter is applied when at least portions of said second image contain areas darker than an amount.

Tone mapping adaptation for saturation control

A method and device of encoding both a HDR picture (I) and a first SDR picture (I) obtained from said HDR picture, in at least one bitstream (F, F, F, F). The method comprises: &#x2014;obtaining () a second SDR picture (I) by tone-mapping the HDR picture (I); &#x2014;obtaining () a color mapping function (CMF) that allows the mapping of the colors of the second SDR picture (I) onto the colors of a third SDR picture (I) obtained () from the first SDR picture (I); &#x2014;encoding (), in a bitstream, an information (INF) representative of the color mapping function; and &#x2014;encoding (), in a bitstream, a fourth SDR picture (I) obtained () from the first SDR picture (I). The present disclosure further relates to a method and device of decoding.

Method and device for encoding both a HDR picture and a SDR picture obtained from said HDR picture using color mapping functions

The invention concerns scaling color difference components prior to encoding in order to extend the dynamic range. In one embodiment the color difference components are encoded prior to quantization. In another embodiment the color difference components are encoded after quantization. A decoder is configured to process data representative of the gain factor for a decoding process.

Method and apparatus for processing image data

The present disclosure generally relates to a method and device for obtaining three color difference components from three components C1, C2 and C3 representing colors picture data in an input color space, a first of said color difference components being defined from the component C1, a second of said color difference components being defined from the first color difference component and the component C2, and a third of said color difference components being defined from the first color difference component and the component C3. The method is characterized in that it further comprises: &#x2014;obtaining a first component by applying a process to the component C1; &#x2014;obtaining said first color difference component by applying the inverse process to the first component.

Method and device for obtaining color difference components for color picture data

A method for encoding a plenoptic image divided into blocks is disclosed. The method comprises: &#x2014;encoding (S) a block in a central region of the plenoptic image, called central block, without spatial prediction; and &#x2014;predictively encoding (S) blocks immediately surrounding said central block by spatially interleaving spatial unidirectional prediction and spatial bi-directional prediction.

Method for encoding and method for decoding a light field based image and corresponding devices

A method for encoding a current focal stack is disclosed that comprises a set of images focused at a different focalization distance from one image to another. According to present disclosure, the method comprises: &#x2014;encoding () information representing an image of the current focal stack, the image being selected in said current focal stack according to an image sharpness criterion, and reconstructing the image into a reconstructed image; &#x2014;encoding () at least another image of the current focal stack by prediction from at least the reconstructed image.

Method and device for encoding and decoding a light field based image, and corresponding computer program product

A method for coding an HDR picture is disclosed that includes mapping the HDR picture to obtain a SDR picture, determining color correcting parameters, color correcting said SDR picture responsive to said color correcting parameters, and encoding the color corrected SDR picture in a stream. In the method, determining color correcting parameters includes determining an intermediate SDR picture so that at least one color appearance value is preserved between said HDR picture and said intermediate SDR picture, and determining the color correcting parameters from said intermediate SDR picture and from said SDR picture.

Method and device for encoding a HDR picture

In an image processing method to display a stereoscopic image on a target screen, a disparity information () is associated with the stereoscopic image and is adapted for the display of the stereoscopic image on an original screen, the size of the original screen being different from the size of the target screen, the stereoscopic image comprising a first image () and a second image (). In order to optimize the disparity of the stereoscopic image, the method comprises selecting a part of said first image according to at least one property associated with the first image; calculating a target disparity information associated with the selected part of the image according to the viewing conditions associated with the target screen and the original disparity information associated with the selected part of the first image.

Method for reducing the size of a stereoscopic image

Growing community of inventors

Livre sur Changeon, France

Patrick Lopez