Patent ID: 8040948
Filing Date: 2011-10-18
Classification: H04N

Abstract:
1. A method for compressing a moving-image organized in blocks of pixels, comprising: comparing a block to be coded with a plurality of candidate prediction blocks; determining, for each candidate prediction block, a respective value of an index representing the difference between the block to be coded and each candidate prediction block; and choosing between said candidate prediction blocks, as a function of the respective value of said index, a prediction block to be used for the coding of said block to be coded, said method further comprising: considering said signal pixel by pixel on said block to be coded and on said plurality of candidate prediction blocks as sampling of respective surfaces in a 3D space representing the pattern of said signal in said block to be coded and in said plurality of candidate prediction blocks; and choosing, as said index representing the difference between the block to be coded and each candidate prediction block, an index of the parallelism between said respective surfaces, wherein the index of parallelism is generated from a statistical distribution based upon the differences that includes pixels having a most frequent value, a number of pixels having the most frequent value, a centroidal value corresponding to a selected location of the pixels, and a coefficient of variation.