Patent ID: 7899119
Filing Date: 2011-03-01
Classification: H04N

Abstract:
1. Method of coding a sequence of images including a step for subdividing the images into blocks of images, a step for configuring the blocks into regions, a region corresponding to a succession of consecutive or non-consecutive blocks, according to the television scanning order of the image, a step for estimating movement between a current image and a preceding image of the sequence to provide a field of movement associating movement vectors with the image blocks, an inter- or intra-block coding step, the blocks being coded by region according to an ordering of the regions, and, for a region, according to the order of succession of the blocks that make up the region, a coded block error correction step, wherein, a step for analysing the field of movement is carried out to calculate a “lifespan” parameter assigned to a block and corresponding to its probability of existence in subsequent images, according to the movement vector associated with this block, said “lifespan” parameter of the block being calculated by extrapolating the movement vector of the field of movement assigned to the block, the configuring step is performed taking into account the value of this parameter to define and order the regions of the image from most important to least important, the error correction step uses a more effective error correction algorithm for the coded data corresponding to the most important regions than for the data corresponding to the least important regions.