Patent ID: 8059722
Filing Date: 2011-11-15
Classification: H04N

Abstract:
1. Method for choosing a mode of coding, from among a plurality of modes of compression coding of images divided into blocks, so as to code a subset of blocks included in a set of blocks, the method including at least two iterative executions of the steps of: calculation of an energy function over the set of blocks using a processor for each of the modes of coding, storage of calculation elements of the energy function for at least the subset of blocks, choice of a first mode of coding minimizing the energy function over the set of blocks, calculation of the energy function over the subset of blocks for each of the modes of coding, the calculation of the energy function using the calculation elements stored for the subset of blocks and implementing a step of estimation, over a neighbourhood of the subset, of a cost of coding for the modes of coding distinct from the first mode of coding and, choice of a second mode of coding minimizing the energy function over the subset˜wherein the subset of blocks of the first execution is used as the set of blocks of the second execution.