| US 7,564,757 B2 | ||
| Optical disk recording apparatus | ||
| Yukihisa Nakajyo, Kanagawa-ken (Japan); and Morito Morishima, Shizuoka-ken (Japan) | ||
| Assigned to Yamaha Corporation, Hamamatsu-shi (Japan) | ||
| Filed on Apr. 23, 2004, as Appl. No. 10/831,606. | ||
| Claims priority of application No. P. 2003-122086 (JP), filed on Apr. 25, 2003. | ||
| Prior Publication US 2005/0018575 A1, Jan. 27, 2005 | ||
| Int. Cl. G11B 7/00 (2006.01) | ||
| U.S. Cl. 369—59.11 [369/273; 369/116; 369/47.5; 369/59.24; 347/105] | 10 Claims |
| 1. An optical disk recording apparatus for forming marks by irradiating an optical disk with laser light to form a visible
image on the optical disk together with recording data to the optical disk, the optical disk recording apparatus comprising:
a strategy circuit which converts recording data into a pulse train signal for defining an irradiation timing of the laser
light according to one of a plurality of conversion rules under each of which, marks of different width are formed,
a changing unit which changes the conversion rule used for the strategy circuit from one of the conversion rules to another,
when one of a portion for which complementation of the recording data is possible and a portion for which the discarding of
a reproduction signal is negligible has arrived after a timing of forming a contour of an image has passed when forming the
image on the optical disk; and
an irradiation controlling unit which controls the irradiation of the laser light according to the pulse train signal based
on the strategy circuit.
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