Patent ID: 7586823
Filing Date: 2009-09-08
Classification: G11B

Abstract:
1. An information recording apparatus comprising: a signal generating unit which generates a light source driving signal having a top pulse and multi-pulse of a necessary number corresponding to a recording mark length of recording data; and a recording unit which irradiates a recording light on an optical recording medium by driving a light source based on the light driving signal and forms recording marks on the optical recording medium, wherein the signal generating unit includes: a multi-pulse generating unit which generates a multi-pulse including plural pulses each having a period 3-times larger than a base clock period T of the recording mark; and a top pulse generating unit which generates first identical-shape top pulses for recording marks when recording 3nT mark length, and second identical-shape top pulses for recording marks, when recording at (3n+1)T mark length, and third identical-shape top pulses for recording marks when recording at (3n+2)T mark length wherein the third pulse is a multi-pulse formed by two pulses and n is a positive number from 1-4.