Orange

France Telecom

S.a. Vitec

Jean-Marc Thiesse

Guillaume Laroche

Joël Jung

Stephane Pateux

Joel Jung

Stéphane Pateux

David Gommelet

Didier Nicholson

Marc Antonini

Madhukar Bhat

Julien Le Tanou

A method for decoding a bitstream comprising a sequence of encoded images. The method includes: obtaining first information from first encoded data contained in the bitstream; determining a list of coding parameters on the basis of the first information and of at least one predefined list of coding parameters; obtaining second information from second encoded data contained in the bitstream, the second information corresponding to a coding parameter among the coding parameters in the list of coding parameters; determining an element of a reconstructed image corresponding to an element of an image in the sequence of images, by means of the coding parameter corresponding to the second information and of encoded data representative of the element of the image in the sequence; wherein the size of the second encoded data depends on the number of coding parameters in the list of coding parameters.

Method for encoding and decoding video by signaling of a candidate sub-assembly

A method is provided for decoding a signal that represents at least one image. The method implements at least one iteration of the following steps, for at least one block of the image to be decoded: determining at least one selection parameter from at least one characteristic associated with at least one reference pixel of a reference region of the image, the reference region including at least one previously encoded/decoded block and/or at least one pixel predicted in a preceding iteration; selecting at least one pixel to be predicted in the block to be decoded from the at least one selection parameter; and for at least one selected pixel to be predicted, referred to as an anchor pixel, predicting the anchor pixel from at least one reference pixel, thereby outputting a predicted pixel.

Methods and devices for encoding and decoding at least one image implementing a selection of pixels to be predicted, and corresponding computer program

A method and apparatus are provided for processing movement information relating to a regular image of a sequence of images. The method includes: a step of building a list including at least one expected piece of movement information and at least one unexpected piece of movement information; a first step of associating expected movement information with movement information according to a first rule for optimizing the cost of encoding the movement information to be encoded; a second step of associating each unexpected piece of movement information not associated during the first association step with movement information to be encoded, identified among the pieces of movement information of the list, according to a second rule which aims to ensure that each piece of movement information is associated with a single piece of movement information to be encoded.

Method for processing a motion information item, encoding and decoding methods, corresponding devices, signal and computer program

A method and device relate to coding an image split up into partitions, which comprises the selection of at least one mode of coding and of its associated coding information items, from among items placed in competition, the prediction of the data of a current partition, the determination of residual data. Calculation of the value of a function representative of said residual data are performed, then the comparison of said calculated value with a value selected as value of competition index from among the associated values. If the values are equal, said signal transmitted comprises said residual data and said associated coding information items. If not, the residual data determined are modified so that the value of the function representative of the residual data is equal to the selected value of competition index, the signal transmitted comprising the modified residual data, excluding the selected value of competition index.

Methods and devices for image encoding and decoding, and corresponding computer programs

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Paris, France

Jean-Marc Thiesse