Abstract: In a process for representing digital data by binary signals, in which the data are in the form of binary-coded, ternary-coded characters, or characters coded in a higher value code, the characters are fed in the form of data signals to a data transmitter which assigns binary signals to the characters. The binary signals are transmitted over a transmission channel to a data receiver which regains the digital data from the binary signals. The possible combinations of a given number of characters which form a group of characters are each assigned at least one combination of a plurality of signal elements, each of which represents a binary signal and forms a group of signal elements. The combination, in each case, contains first signal elements representing a first or a second amplitude value and/or second signal elements representing a change in the amplitude value.