1. Method for encoding/decoding digital data to be transmitted through a serial link, said digital data comprising a first so-called data bit sequence and a second so-called “label” bit sequence, characterized in that, said first ( 20, 20 ′) and second ( 21, 21 ′) sequences having first (m) and second (p) given bit lengths, it includes at least one encoding phase comprising at least a step for checking ( 3, 3 ′, 9 ) at least one slice (CDE, 20 ′ a - 20 ′ b ) of at least two consecutive bits, each of said slices being located in a predetermined area of said first bit sequence ( 20, 20 ′), so as to create a partitioning of the latter into parts of approximately equal length, said check ( 3, 3 ′, 9 ) consisting of performing a test to determine whether the consecutive bits of each of said slices (CDE, 20 ′ a - 20 ′ b ) are in the same logical state, “0” or “1,” a second step ( 7 ) consisting of setting the bits (X 1, X 2 ) of said second sequence ( 21, 21 ′) to predetermined logical state configurations in one-to-one relation with the result of said test, and a step for inverting ( 4 ) at least one bit of said slices (CDE, 20 ′ a - 20 ′ b ) when the result of said test is positive and for transmitting said first bit sequence ( 20, 20 ′) without any modifications when the result of said test is negative.