DC CONTROL OF A MULTILEVEL SIGNAL

摘要

A system and method are disclosed for writing a multilevel data sequence to a storage medium so that a read signal generated by reading the multilevel data sequence from the storage medium will have reduced low frequency content is described. The method includes evaluating the effect of a plurality of candidate merge symbols on an RDS of the read signal (504). A preferred merge symbol is selected from among the plurality of candidate merge symbols based on the effect of the preferred merge symbol on an RDS of the read signal (505). The preferred merge symbol is added to the multilevel data sequence so that the RDS of the read signal is controlled (508).