Magnetic disc recording apparatus and magnetic disc playback apparatus.

摘要

A magnetic disk recording apparatus according to this invention controls a pulse width of a recording signal in dependency upon a pattern of coded record data and a head (2) position to thereby suppress a peak shift of a playback signal. Further, a magnetic disk recording apparatus according to this invention individually controls preceding and succeeding change positions of a recording signal in dependency upon a pattern of coded record data and a head (2) position to thereby suppress a peak shift of a playback signal. In addition, a magnetic disk playback apparatus according to this invention controls an equalization characteristic of an equalizer in dependency upon a head (2) position to thereby suppress a peak shift of a playback. <IMAGE>