Patent ID: 6208272
Filing Date: 2001-03-27
Classification: H03M,H04N

Abstract:
A method of decoding a coded digital signal, the coded signal being quantized by means of quantization symbols associated respectively with quantization cells, said method comprising the steps of:reading the quantization symbols;constructing an experimental distribution of the quantization symbols on the quantization cells by calculating the number of occurrences of the quantization symbols in the coded signal;approximating the experimental distribution by means of a continuous distribution model the continuous distribution model passing through values of the experimental distributioncalculating, for at least one quantization cell, a dequantization vector equal to a center of mass of the points of the quantization cell weighted by values of the continuous distribution restricted to the quantization cell;storing the dequantization vectors associated respectively with the quantization symbols; anddequantizing the coded signal, representing each vector of the signal by means of a dequantization vector associated with the quantization signal received.