| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately detect address information by using a simpler detecting circuit when address information is recorded on a track of an optical disk by the same phase both wobbles. <P>SOLUTION: In the optical disk wherein tracks by grooves and tracks by lands are alternately disposed in the radial direction to form a recording region and an address information recording region in which information is recorded by the same phase both wobbles is formed in the respective grooves, the respective grooves are constituted in such a manner that (a) the address information recording region comprises a plurality of individual address information recording parts (6a) to (6c) disposed in the track direction and (b) an address selection information recording part (5) showing which the individual address information recorded in the plurality of individual address information recording parts should be selected is disposed on the upstream side of the plurality of individual address information recording parts (6a) to (6c) in the address information recording region. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
