Patent ID: 6958958

Claim:
A disk drive device, comprising: recording means for recording data on a disk-shaped recording medium by driving a laser based on recorded data; reflected light detecting means for detecting reflected light accompanying output of said laser and obtaining reflected light information signals; decay means for decaying reflected light information signals obtained by said reflected light information detecting means during recording operations of said recording means, based on decay control signals; address extracting means for obtaining address information from reflected light information signals decayed by said decay means; and decay control signal generating means for generating said decay control signals so as to execute decaying at said decay means, in a period of said reflected light information signals, corresponding to at least a period wherein the output of said laser is at recording power; wherein said recording means generates encoded data by encoding processing of data to be recorded, further generates laser driving pulses based on the encoded data, and drives said laser based on said laser driving pulses; and wherein said decay control signal generating means performs delay processing with regard to said encoded data or said laser driving pulses to generate said decay control signals.