Orange

Adria Arrufat

Pierrick Philippe

A method of coding at least one image sliced into blocks. The method implements, for a current block to be coded: predicting the current block in accordance with a prediction mode selected from among predetermined prediction modes, Intra and Inter, the selected mode of prediction being Intra; calculating a residual data block representative of a difference between a predictor block obtained on completion of the prediction and the current block; applying a transform operation to the data of the residual block, the transform operation belonging to a set of transform operations previously stored in association with the selected mode of Intra prediction; and coding the data obtained from the transform operation. The number of transform operations contained in the set associated with the selected Intra mode is different from the number of transform operations contained in a set of transform operations stored in association with the mode of Inter prediction.

Method of coding and decoding images, device for coding and decoding images and computer programmes corresponding thereto

A method for encoding at least one image split into blocks. The method includes, for a current block to be encoded from the image, at least one modification of two data points in the block via an operation of linear combinations operating on the two data points, at the end of which a modified block is obtained, application of a separable transform operation to the data points in the modified block, and encoding the data points obtained after application of the separable transform operation.

Method for encoding and decoding images, device for encoding and decoding images, and corresponding computer programs

A method of coding at least one image sliced into blocks. The method implements, for a current block to be coded of the image: predicting the current block in accordance with a prediction mode selected from among a plurality of predetermined prediction modes, calculating a residual data block representative of a difference between a predictor block obtained on completion of the prediction and the current block, applying a transform operation to the data of the residual block, the transform operation belonging to a set of transform operations previously stored in association with a selected prediction mode, and coding the data obtained from the transform operation. The number of transform operations contained in the set associated with the selected mode is different from the number of transform operations contained in a set of transform operations stored in association with at least one other predetermined prediction mode of the plurality.

A method is provided for encoding at least one image cut into blocks. The method includes, for a current block having K pixels to be encoded, wherein K&#x3e;1, acts including: predicting the current block using at least one predictive block having K pixels; then determining a residual block having K pixels and representing the difference between the predictive block and the common block. A set of Mi data is determined from a pixel block group containing a number Mi of blocks having K pixels and each representing a predetermined texture, wherein 1&#x3c;Mi&#x3c;K, by calculating the pixel-by-pixel product of the residual block determined by each of the Mi blocks of K pixels representing a predetermined texture, and encoding the Mi data from the determined data set.

Video encoding and decoding device and method including a texture block prediction with a group of pixel blocks each representing a predetermined texture

Growing community of inventors

Rennes, France

Adria Arrufat