Patent ID: 9743117
Date: 2017-08-22
CPC Classifications: H03M,H04N

Claim:
1. An entropic binary coding method for a series (S) of symbols (Sn) using at least two models (m), each model being associated with a belonging criterion, said method comprising: a first step of counting, for an entirety of said series (S), a total number of occurrences of each symbol to be coded using each one of said at least two models, said first step comprising: i) initializing, for each one of said at least two models, and for each symbol, a count of a number of occurrences of each symbol to be coded by each model, and ii) running said series in order, for each symbol, to determine the encoding model (m) to which each symbol belongs, according to said belonging criteria, and incrementing the count of the number of occurrences of said symbol to be coded by said model; then a second step of calculating, for each model and for each symbol, a probability (P) of occurrence of the symbol in the model based on i) the total number of occurrences of the symbol to be coded by the model, and ii) the total number of occurrences of all symbols to be coded by the model; then a third step of encoding said series comprising running through said series, and encoding each symbol successively according to the model to which each symbol belongs using the probability of occurrence calculated in the second step; and a fourth step of storing the models or information enabling the models to be reconstituted and the binary code thus obtained.