Patent ID: 7483353
Filing Date: 2009-01-27
Classification: G11B

Abstract:
1. An optical disk device for recording or reproducing data with respect to grooves and lands of an optical disk in which address information is embedded by forming the grooves and the lands in wobbles, the address information being embedded after conversion into a gray code in which a distance between codes for two consecutive address values is equal to 1, in which the wobbles form data of a single bit by N number of in-phase waves, the optical disk device comprising: means for reproducing the wobbles; means for counting the number of in-phase waves detected from the reproduced wobbles; and address determination means for confirming, when the number of in-phase waves of the wobbles is N/2+1 or greater, bit data in accordance with the phase and for determining a reading error and performing a predetermined error process when the number of in-phase waves of the wobbles is N/2.