Patent ID: 8422805

Claim:
A method for encoding an image or a sequence of images generating a data flow in the form of groups of blocks, at least one group of blocks grouping image blocks having a resolution and a quality level of identical quantification, wherein said method comprises, for encoding of the group of blocks at said resolution and quality level, at least the following steps, for the at least one group of blocks, of a first sub-pass corresponding to a first encoding step adapted to generate, for each block of the at least one group of blocks, coded data that is useful for a prediction at a higher quality level, and a second sub-pass corresponding to a second encoding step adapted to generate coded data that is not useful for a prediction at the higher quality level, so that for said at least one block, the coded data generated at the first and second sub-passes can be combined during decoding in order to decode said group of said block.