1. An encoding method implemented by an encoding device, associating redundancy data with source data and implementing a plurality of local codes setting up an association between at least one input state word and at least one output state word, according to at least one label word, comprising: a connection step, interconnecting the local codes by the input and output state words associated with the local codes to form at least one encoding trellis, each trellis defining a base code formed by at least two trellis sections, said local codes being error detection codes in a predetermined encoding alphabet, and wherein the connection step is performed by the encoding device, and; a permutation step, repeating the redundancy data and source data and changing the order of the repeated data, delivering the label words used to associate the input state words to the output state words, and wherein the permutation step is performed by the encoding device.
1. An encoding method implemented by an encoding device, associating redundancy data with source data and implementing a plurality of local codes setting up an association between at least one input state word and at least one output state word, according to at least one label word, comprising: a connection step, interconnecting the local codes by the input and output state words associated with the local codes to form at least one encoding trellis, each trellis defining a base code formed by at least two trellis sections, said local codes being error detection codes in a predetermined encoding alphabet, and wherein the connection step is performed by the encoding device, and; a permutation step, repeating the redundancy data and source data and changing the order of the repeated data, delivering the label words used to associate the input state words to the output state words, and wherein the permutation step is performed by the encoding device. 17. The encoding method according to claim 1 , wherein at least one said local codes comprises a two-state code (8, 7, 2) setting up an association, with an input state bit, of an output state bit, as a function of eight label bits, where: 8 is the length of said local code, or the number of the label bits of the local code; 7 is the size of said local code; 2 is the minimum distance from said base code.