7. Method according to claim 5, comprising the step of; subsequent muting of data words.
7. Method according to claim 5, comprising the step of; subsequent muting of data words. 8. Method according to claim 7, whereas operation of choosing data and correction words and adding code words are carried out in a first memory and whereas corresponding word flags are stored in a second memory, comprising the step of: using addresses designated for writing in of data words into said first memory for coding, as addresses for reading out of word flags from said using addresses designated for writing in of data words into said first memory for coding, as addresses for reading out of word flags from said second memory, said word flags belonging to combined data words in said second sequence, for generating a muting signal.