1. A system for decoding code words which each comply with a minimum runlength condition in accordance with at least one of EFM and EFM-PLUS coded formats and each represent a binary information code associated with said code word, comprising: an enumeration circuitry for associating in a one-to-one manner with each of the code words to be decoded a numerical value from a substantially continuous set of numerical values, and a read-only memory in which is stored, at each location addressable with one of the numerical values from said set, a binary information code associated with the code word in turn associated with the numerical value for addressing said location said read-only memory being equal to or smaller than 1149 rows of 8 bits.