Interdigital Vc Holdings, Inc.

Thomson Licensing

Interdigital Ce Patent Holdings

Interdigital Ce Patent Holdings, Sas

Catherine Serre

Fabrice Leleannec

David Touze

Robin Le Naour

Dominique Thoreau

Yannick Olivier

Sebastien Lasserre

Jurgen Stauder

Fabrice Le Leannec

Pierre Andrivon

Thierry Tapie

Serge Defrance

Erik Reinhard

Marie-Jean Colaitis

Ronan Boitard

Kadi Bouatouch

Remi Cozot

A method comprising obtaining a current RGB image; classifying colors of pixels of the current RGB image in a plurality of classes; for each color class, determining data representative of said color class, comprising a dominant luminance value representative of a luminance at which a color in said class is predominant and determining from said data representative of said color class a value representative of a gain of chrominance representative of a margin for increasing a chrominance component in said color class; and, encoding the dominant luminance value and the value representative of the gain corresponding to each class as metadata representative of a Saturation Gain Function in a bitstream, said function defining a color correction to apply to a pixel in function of a luminance of said pixel.

Chroma boost on SDR and HDR display adapted signals for SL-HDRx systems

The present disclosure relates to a method and device for obtaining a second image from a first image when the dynamic range of the luminance of the first image is greater than the dynamic range of the luminance of the second image. The disclosure describes deriving at least one component representative of the colors of the second image from the first image, and maximizing at least one derived component according to a maximum value depending on a linear-light luminance component of the first image.

Method and device for obtaining a second image from a first image when the dynamic range of the luminance of the first image is greater than the dynamic range of the luminance of the second image

At least one embodiment obtain a method for reconstructing an image from metadata representing a given color space, comprising mapping said given color space to a candidate color space which encompasses in its convex hull all the primaries of the given color space; and reconstructing the image using said candidate color space.

Processing an image

The disclosure relates to a method including applying a first format modification to an audio and video input content in a first format to output a content complying with a second format, information about the first format modification being associated to the output content. The disclosure also relates to a method including obtaining an audio and video input content complying with an input format and information about a first format modification applied to the input content and determining a second format modification to apply to the input content by taking account of the first format modification. It also relates to corresponding signal, devices, electronic assembly, system, computer readable program products and storage media.

Methods for processing audio and/or video contents and corresponding signal, devices, electronic assembly, system, computer readable program products and computer readable storage media

Method and device for obtaining a second image from a first image when the dynamic range of the luminance of said first image is greater than the dynamic range of the luminance of said second image

A method and device for encoding or decoding a picture block having a luminance component. The method includes obtaining a luminance residual block (L) by subtracting a first representation (L, L) of an average value of the luminance component calculated from the luminance component, obtaining a second representation (&#x192;(L), &#x192;(L)) of the average value by applying a transfer function to the average value (L) of the luminance component in order to reduce the dynamic range of the average value and encoding a luminance block (L) obtained by adding () together the luminance residual block (L) and the second representation (&#x192;(L), &#x192;(L)) of the average value.

Method for encoding/decoding a picture block

According to this method, upon reception of a color transform associated with a main sequence, a transition sequence is generated from successive images of this main sequence such that the first image of this transition sequence is an image received after reception of this color transform, transition color transforms associated with images of said transition sequence are generated by blending a color transform associated with a previous main sequence or no color transform with the second color transform, and each image of this transition sequence is processed using the transition color transform associated with said image.

Method of transitioning color transformations between two successive main sequences of a video content

At least one of the present embodiments generally relates to a method for encoding a HDR picture and a first LDR picture, the method comprising obtaining a second LDR picture responsive to a ratio between the HDR picture and a backlight picture and encoding the first LDR picture and the second LDR picture by predicting one of the first and second LDR pictures by the other one of the first and second LDR pictures. The method wherein it further comprises, before encoding, adjusting the first LDR picture responsive to the backlight picture. The disclosure relates also to a method and device for decoding an LDR picture providing a lower dynamic range depiction of the picture content of an HDR picture.

Method and device for encoding and decoding a HDR picture and a LDR picture

The invention relates to a method and device for quantising the floating value of a pixel of an image by rounding either to a lesser whole number, to a greater whole number, or to the whole number closest to this floating value. The method is characterised in that the selection of rounding this floating value is determined based on a test value.

Method and device for quantising the floating value of a pixel in an image

A method for encoding a sequence of high dynamic range pictures is disclosed. The method comprises for each picture of the sequence:

Encoding and decoding methods for adapting the average luminance of high dynamic range pictures and corresponding encoder and decoder

The present invention relates to the domain of video equipment. It relates to a phase-locked loop able to recover the timing of a synchronization signal comprising a temporal discontinuity of amaximum amplitude equal to PCR_Modulus, the loop comprising:

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Saint Gregoire, France

Catherine Serre