Demodulating device, demodulating method and supply medium

摘要

A demodulator refers to an internal conversion table and demodulates data that was input. Said conversion table has elements to restrict the continuation of the minimum run and a non-determined code and also has a conversion rule to take the surplus of the number of "1"s inside the elements of the data string and the number of "1"s inside the elements of the converted code word string when divided by two and then match the surplus with either a "0" or a "1". The demodulated data is input to the DSV eliminator and output by way of the buffer after removal of the DSV bit and thus a codedword string on which DVS control was performed can be efficiently and reliably decoded.