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Interdigital Madison Patent Holdings

Olivier Le Meur

Jean-Yves Babonneau

Patrick Le Callet

Dominique Barba

Alexandre Ninassi

Jean-Claude Chevet

Jacky Dieumegard

Fabrice Urban

Dominique Thoreau

Edouard Francois

Philippe Guillotel

Christel Chamaret

Patrice Alexandre

Jerome Vieron

Philippe Salmon

Anita Orhand

Ludovic Noblet

Lila Huguenel

Juan Moronta

Georges Joulaud

Guillaume Courtin

Clement Rousseau

Christelle Chamaret

Dominique Touchais

Leonard Porta

Clément Rousseau

The present invention pertains to a method for selecting a version of a document. The user inputs an identifier of a document at the level of his receiver connected to at least one communication network, and initiates a search request to receive versions of at least one part of this document. The receiver then receives a plurality of versions of the said document. Each version received is analysed by a plurality of evaluation modules so as to calculate an evaluation value for each version received according to a predetermined criterion. The receiver selects for each of the evaluation modules a version of the document having the best evaluation in respect of this criterion, and displays the identifiers of versions having the best evaluations according to each criterion. The user can then easily select the version for reproduction thereof which best meets a criterion. The invention also relates to a receiver implementing the said method.

Method of selecting versions of a document from a plurality of versions received after a search, and related receiver

A method for assessing the quality of a distorted version of a frame sequence includes the steps of determining a last spatial distortion by comparing a block of a last frame (I) of the sequence with a corresponding block of the distorted version of the last frame, determining, in a last-but-one frame, a best-matching block matching said block of the last frame best, determining a last-but-one spatial distortion by comparing the determined best-matching block of the last-but-one frame with a corresponding block of the distorted version of the last-but-one frame, determining a spatio-temporal perceptual distortion value associated with said block using said determined distortions and using the determined spatio-temporal perceptual distortion value for assessing the quality.

Method for assessing the quality of a distorted version of a frame sequence

The present invention relates to a method for processing pictures intended to insert an advertising clip at a point, called insertion, between two pictures of a sequence of video pictures, called video sequence, comprising the following steps:

Method for inserting an advertising clip into a video sequence and corresponding device

A method for coding a picture portion of a picure of a video sequence is disclosed, at least one picture of the video sequence being a key picture. The method comprises the following steps: The invention also relates to a method for decoding a binary stream, a coder able to code pictures of a video sequence and a decoder of a binary stream.

Method of coding, decoding, coder and decoder

The invention relates to a method for reframing an image according to at least one predefined reframing method to obtain a reframed image for which the format ratio is equal to a target format ratio. The method comprises the following steps for: analyzing the image, selecting the predefined reframing method in a set of at least two reframing methods according to the result of the analysis step, and reframing said image using the selected reframing method. The invention also relates to a device for reframing an image.

Method for image reframing

The invention relates to a method of processing an image of a video image sequence, wherein it comprises the following successive steps:

Pre-processing device and method before encoding of a video image sequence

A method and device for analysing video images by obtaining high frequency components. The device includes means for obtaining high-frequency components of a video image and means for obtaining a high-frequency image on the basis of the high-frequency components. Means for calculating the variance for each pixel of the high-frequency image. Means for associating a coefficient with each pixel of the video image as a function of the variance. The coefficient is representative of the visual sensitivity of each pixel for the human eye. The invention relates to a method and a device for analysing video images.

Device and method for analysing images by calculating the variance for each pixel of a high-frequency image

Detection of the salient points in an image enable the improvement of further steps such as coding or image indexing, watermarking, video quality estimation. The methods rely on the fact that a model is fully based on the human visual system (HVS) such as the computation of early visual features, and the methods compute a saliency map for video images taking into account motion and the velocity of the eye.

Device and method for creating a saliency map of an image

The invention relates to a method for determining the salience map of an audio video document. The method comprises the steps for:

Method and device for calculating the salience of an audio video document

The invention relates to an automatic detection method in a source image, of at least one area called a layout area comprising at least one layout, such as a logo and/or a score. According to the invention, the layout areas of a source image are detected using the salience of source image pixels. The detection is carried out in specific areas of the source image saliency map, usually in the areas corresponding to the corners of the image or to the bands in the upper part and lower part of the image. In these areas, two points are sought having maximum salience values and distant by at least p points from each other. These two points corresponding to the beginning and end of a layout area. The window bounding these two points then corresponds to a layout area.

Method for detecting layout areas in a video image and method for generating an image of reduced size using the detection method

A method of obtaining a saliency map from a plurality of saliency maps created from different visual quantities. Initially the saliency maps are normalized based on a theoretical maximum of each visual quantity. An intra-competition step selects the main saliency areas in each saliency map. An inter-competition step is then performed based on a sum of the intra-map competition with an inter-map redundancy term that is a function of the product of the intra-map competitions and of the probability of a site appearing on the saliency maps.

Method of obtaining a saliency map from a plurality of saliency maps created from visual quantities

The present invention relates to a method for image processing to generate, from a source image having a predefined width to height ratio, called initial ratio, and an information banner having predefined width to height ratio, called banner ratio, a final image having a width called final and a height called final and for which the width to height ratio, called final ratio, is different from the initial ratio, comprising the following steps:

Method for image format conversion with insertion of an information banner

The invention relates to an image processing method to generate, from a source image, an image of reduced size whose ratio between the width and the height is equal to a predetermined value, called reduced ratio. It comprises the following steps:

Image processing method

A method for assessing image quality between a reference image and an impaired image is disclosed. The method comprises the steps of The subband decomposition is based on a wavelet transform adapted to decompose each of the luminance components into L levels of decomposition, with L a positive integer determined as a function of the image height and of the distance of visualization.

Method for assessing image quality

The invention relates to a method of locally adjusting a quantization step for each region of an image with respect to a setpoint quantization step. The method comprises the steps of:

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Talensac, France

Olivier Le Meur