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1. (WO2017037368) METHOD OF CODING AND DECODING IMAGES, DEVICE FOR CODING AND DECODING IMAGES AND COMPUTER PROGRAMMES CORRESPONDING THERETO

Pub. No.:    WO/2017/037368    International Application No.:    PCT/FR2016/052128
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Sat Aug 27 01:59:59 CEST 2016
IPC: H04N 19/103
H04N 19/12
H04N 19/176
H04N 19/157
H04N 19/61
Applicants: ORANGE
Inventors: PHILIPPE, Pierrick
ARRUFAT, Adrià
Title: METHOD OF CODING AND DECODING IMAGES, DEVICE FOR CODING AND DECODING IMAGES AND COMPUTER PROGRAMMES CORRESPONDING THERETO
Abstract:
The invention relates to a method of coding at least one image (ICj) sliced into blocks, implementing, for a current block (Bi) to be coded of said image: - a prediction (C3) of the current block in accordance with a prediction mode (MPs) selected from among a plurality of predetermined prediction modes, - a calculation (C4) of a residual data block representative of a difference between a predictor block (BPopt) obtained on completion of the prediction and the current block, - an application (C6) of a transform operation to the data of said residual block, said transform operation belonging to a set of transform operations which is previously stored (C0) in association with a selected prediction mode, - a coding (C8) of the data obtained on completion of said transform operation, said method of coding being characterized in that during the storage (C0) of the set of transform operations which is associated with said selected prediction mode, the number of transform operations contained in said set is different from the number of transform operations contained in a set of transform operations which is stored in association with at least one other predetermined prediction mode of said plurality.