| US 7,586,823 B2 | ||
| Information recording apparatus and information recording method | ||
| Atsushi Yamaguchi, Tokorozawa (Japan); Masahiro Kato, Tokorozawa (Japan); Eiji Muramatsu, Tokorozawa (Japan); and Shoji Taniguchi, Tokorozawa (Japan) | ||
| Assigned to Pioneer Corporation, Tokyo (Japan) | ||
| Appl. No. 10/546,719 PCT Filed Feb. 25, 2004, PCT No. PCT/JP2004/002169 § 371(c)(1), (2), (4) Date Aug. 24, 2005, PCT Pub. No. WO2004/077419, PCT Pub. Date Sep. 10, 2004. |
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| Claims priority of application No. 2003-054374 (JP), filed on Feb. 28, 2003. | ||
| Prior Publication US 2006/0153038 A1, Jul. 13, 2006 | ||
| Int. Cl. G11B 7/0045 (2006.01) | ||
| U.S. Cl. 369—59.11 [369/47.51] | 14 Claims |
| 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.
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