Maximum runlength-limited codes with error control capabilities

New methods are presented to protect maximum runlength-limited sequences ag ainst random and burst errors and to avoid error propagation. The methods e mploy parallel conversion techniques and enumerative coding algorithms that transform binary user information into constrained codewords. The new sche mes have a low complexity and are very efficient. The approach can be used for modulation coding in recording systems and for synchronization and line coding in communication systems. The schemes enable the usage of high-rate constrained codes, as error control can be provided with similar capabilit ies as for unconstrained sequences.