Patent ID: 7681964

Claim:
A recording medium processing apparatus comprising: a head unit which traces a track formed on a recording surface of a recording medium and reads a data signal; a signal processing unit which detects positional information of the recording medium on the basis of the data signal; and a printing unit which prints visible information on a non-recording surface of the recording medium by referring to the positional information, wherein the signal processing unit includes: a clock generation unit which generates a reproduction clock on the basis of the data signal; a counter which counts the reproduction clock; a position detection unit which detects positional information of the recording medium from the value of the counter; an address detection unit which detects address information of physical sectors of the track; and a reset signal generation unit which resets the value of the counter when the address information is a predetermined value, wherein the head unit further includes a drive control unit which allows the head unit to track jump to an inner circumference side when the head unit reaches a predetermined jump position of the track, and wherein the clock generation unit detects the period of a synchronization signal and maintains the generation of the reproduction clock generated up to that time in a period when the synchronization signal is determined to be abnormal.