WO 2026/068427 A1: Method for achieving relative encoding of a signal

Abstract

Disclosed is a method for encoding a source message via a symbol frame, the source message containing a first number (l) of initial variables $(x_0, x_1, ..., x_{l-1})$, each initial variable being discrete and taking values among a finite set (F), the method comprising the steps of: - determining a second number (k) of relative variables $(y_0, y_1, ..., y_{k-1})$ expressed by a change of variable using the initial variables $(x_0, x_1, ..., x_{l-1})$, - encoding the relative variables $(y_0, y_1, ..., y_{k-1})$ using a predefined coding matrix (G), said encoding resulting in a third number (n) of coded relative variables $(z_0, z_1, ..., z_{n-1})$, the third number (n) being greater than the second number (k), - determining a fourth number (m) of coded absolute variables $(c_0, c_1, ..., c_{m-1})$ expressed by the change of variable using the coded relative variables $(z_0, z_1, ..., z_{n-1})$, and in which the symbol frame contains said coded absolute variables $(c_0, c_1, ..., c_{m-1})$.