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Interdigital Vc Holdings, Inc.

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Interdigital Madison Patent Holdings, Sas

Interdigital Madison Patent Holdings

Interdigital Ce Patent Holdings

Dominique Thoreau

Edouard Francois

Philippe Guillotel

Philippe Bordes

Fabrice Leleannec

Jerome Vieron

Christine Guillemot

Yannick Olivier

Ronan Boitard

Martin Alain

Mehmet Turkan

Safa Cherigui

Fabien Racape

Christophe Chevance

Aurelie Martin

Guillaume Boisson

Mikael Le Pendu

Olivier Le Meur

Edouard François

Jean Kypreos

Pierre Ruellou

Anne Lorette

Julien Haddad

Lila Huguenel

Kadi Bouatouch

David Touze

Patrick Lopez

Franck Hiron

Catherine Serre

Patrick Le Callet

Jérôme Vieron

Philippe Salmon

Dominique Barba

Anita Orhand

Jean Begaint

Joaquin Zepeda Salvatierra

Alain Martin

Aurélie Martin

Gwenael Kervella

Remi Cozot

Joan Llach

Benoit Vandame

Paul Kerbiriou

Erik Reinhard

Tania Pouli

Thierry Viellard

Jean-Jacques Fuchs

Fatma Hawary

Edouard Fran&ccedil;ois

Rémi Cozot

François Edouard

Xavier Castellan

Philipe Bordes

Shasha Shi

Leonard Porta

Ronan Boitatd

Mehmet TÜRKAN

Francois Edouard

Mikaël Le Pendu

Christine Kerbrat

Edouard Francis

To encode High Dynamic Range (HDR) images, the HDR images can be converted to Low Dynamic Range (LDR) images through tone mapping operation, and the LDR images can be encoded with an LDR encoder. The present principles formulates a rate distortion minimization problem when designing the tone mapping curve. In particular, the tone mapping curve is formulated as a function of the probability distribution function of the HDR images to be encoded and a Lagrangian multiplier that depends on encoding parameters. At the decoder, based on the parameters indicative of the tone mapping function, an inverse tone mapping function can be derived to reconstruct HDR images from decoded LDR images.

Method and apparatus for encoding and decoding HDR images

For a picture with two or more color components, the prediction residuals for the first color component of a block to be encoded may be transformed with a first transform. The transform coefficients for the first color component may go through quantization, de-quantization and inverse transform to obtain reconstructed prediction residuals. Based on the reconstructed prediction residuals for the first color component, the phases of the transform basis function of the first transform can be adjusted to improve the sparsity of the transformed signal. The prediction residuals for the remaining color components may then be transformed with the adjusted transform. In order to determine the phase shift factor, the reconstructed prediction residuals for the first color component may be transformed with the first transform, adjusted by different candidate phase shift factors, and the candidate phase shift factor that provides a smallest sparsity measure can be selected for the block.

Method and apparatus for adaptive transform in video encoding and decoding

A method and an apparatus for encoding a picture are disclosed. For at least one block of a picture to encode, a block predictor is determined () for a decoded first component () of said at least one block, from a reconstructed region of a first component of said picture. At least one second component of said at least one block is then encoded () by predicting said at least one second component from a second component of said block predictor. Corresponding decoding method and apparatus are disclosed.

Method and apparatus for encoding and decoding at least one block of a picture based on components of the at least one block

A content stream comprising video and synchronized illumination data is based on a reference lighting setup from, for example, the site of the content creation. The content stream is received at a user location where the illumination data controls user lighting that is synchronized with the video data, so that when the video data is displayed the user's lighting is in synchronization with the video. In one embodiment, the illumination data is also synchronized with events of a game, so that a user playing games in a gaming environment will have his lighting synchronized with video and events of the game. In another embodiment, the content stream is embedded on a disk.

Method and apparatus for creating, distributing and dynamically reproducing room illumination effects

The present disclosure generally relates to a method for predicting at least one block of pixels of a view () belonging to a matrix of views () obtained from light-field data belong with a scene. According to present disclosure, the method is implemented by a processor and comprises for at least one pixel to predict of said block of pixels: &#x2014;from said matrix of views (), obtaining () at least one epipolar plane image (EPI) belong with said pixel to predict, &#x2014;among a set of unidirectional prediction modes, determining () at least one optimal unidirectional prediction mode from a set of previous reconstructed pixels neighboring said pixel to predict in said at least one epipolar plane image, &#x2014;extrapolating () a prediction value of said pixel to predict by using said at least one optimal unidirectional prediction mode.

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

The present disclosure generally relates to a method for predicting at least one block of pixels of a view () belonging to a matrix of views () obtained from light-field data belong with a scene, According to present disclosure, the method is implemented by a processor and comprises for at least one pixel to predict of said block of pixels: &#x2014;from said matrix of views (), obtaining () at least one epipolar plane image (EPI) belong with said at least one pixel to predict, &#x2014;among a set of bidirectional prediction modes, determining () at least one optimal bidirectional prediction mode from a set of previous reconstructed pixels neighbouring said at least one pixel to predict in said at least one epipolar plane image, &#x2014;extrapolating () a prediction value of said at least one pixel to predict by using said at least one optimal bidirectional prediction mode.

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

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 and device for processing LDR images of a video sequence to improve image quality. The method comprises temporally decomposing successive HDR frames of a video sequence and the corresponding LDR frames and performing a comparison between the HDR and LDR frequency sub-bands. A current LDR image can then be modified on the basis of a comparison between the frequency sub-bands.

Method and device for processing images

A method for generating at least one image with a first dynamic range, from an image with a second dynamic range, which is lower than the first dynamic range is described. The method includes obtaining an epitome of the image with a first dynamic range, called a first epitome. Thereafter, the image with a first dynamic range is generated from the image with a second dynamic range and the first epitome.

Methods and devices for generating, encoding or decoding images with a first dynamic range, and corresponding computer program products and computer-readable medium

The method includes determining at least one candidate motion vector associated with a neighboring block of said current block. A prediction motion vector is determined from the candidate motion vector, and the current block is coded from the prediction motion vector. The prediction motion vector is determined according by determining, for the candidate motion vector, a corrective motion vector so as to minimize a distortion calculated between the neighoboring block successively coded and reconstructed and a prediction block motion compensated by the at least one candidate motion vector modified by the corrective motion vector. The prediction motion vector is then determined from the candidate motion vector modified by the corrective motion vector.

Motion vector prediction and refinement using candidate and correction motion vectors

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 enhancing quality of an image comprises deriving from an initial low-resolution image (LRI) an initial high-resolution image (IHRI) by upsampling (S, S), providing (S), based on the initial low-resolution image (LRI), at least one downsampled filtered image (AI, AI) with lower resolution, providing (S), based on the initial low-resolution image (LRI), an unfiltered image (LRI, UI) having same resolution as the downsampled filtered image, selecting a patch (PI) from the initial high-resolution image (IHRI), finding (S) filial patches (PA k) similar to the selected patch in the downsampled filtered image (AI, AI), finding, in the unfiltered image (LRI, UI), parent patches (PP) locally associated to the filial patches (PA), and linearly combining (S) the parent patches (PP) to form an enhanced quality patch (EP). Finally, enhanced quality patches (EP) obtained by repeatedly carrying out above steps are combined (S) to form an enhanced quality high-resolution image (EI).

Method and device for enhancing quality of 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

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Cesson Sevigne, France

Dominique Thoreau