Patent ID: 6381201
Filing Date: 2002-04-30
Classification: G11B

Abstract:
An optical disk apparatus, comprising:a light amount detection section for irradiating an information carrier with a light beam so as to detect information recorded in a data section of the information carrier, wherein the information carrier includes the data section and an address section associated with the data section, the data section is an information track formed by a land or a groove where information is recorded or reproduced, and the address section contains address information corresponding to the information track which is recorded in the address section by at least one concave or convex pit offset by a predetermined distance from a center of the information track; an address polarity determination section for determining whether the address section over which the light beam has passed is either on an outer periphery side or on an inner periphery side with respect to the center of the information track being scanned by the light beam, based on a signal output from the light amount detection section; an address reproduction section for reproducing the address information recorded in the address section based on a signal output from the light amount detection section; and an address confirmation section for confirming the data section from which or to which data is to be reproduced or recorded, based on the determination result from the address polarity determination section and the address information reproduced by the address reproduction section.