Patent ID: 6317451
Filing Date: 2001-11-13
Classification: G06T,H04N

Abstract:
A method of quantizing a multidimensional sampled signal including at least one multidimensional sample of given dimension N, the sample or each sample including N components, the process including the steps of:a) for each sample, transforming each component into a set of transformed coefficients in N known numbering bases;b) combining the sets of transformed coefficients; andc) progressively quantizing the combination of the sets of transformed coefficients;whereinfor combining the sets of transformed coefficients it includes the following two successive steps:A) creating, for the multidimensional sample or for each multidimensional sample, a vector the coefficients of which are N-tuplets formed by the transformed coefficients of the same rank i in the N bases of transformation of the characteristic variables; andB) combining the vectors of N-tuplets;the method finally including progressive quantizing of the combination of the vectors of N-tuplets, progressive quantizing being effected on the N-tuplets.