Patent ID: 7248550
Filing Date: 2007-07-24
Classification: G11B

Abstract:
1. A disk recording apparatus for a rewritable optical disk, the disk recording apparatus comprising: a first timing detector having a first timing synchronized with a wobble reproduction signal of the rewritable optical disk; a second timing detector having a second timing synchronized with a track reproduction signal of the rewritable optical disk; a phase difference detector configured to detect a phase difference between the first timing and the second timing; and a controller configured to determine a recording area based on the detected phase difference, wherein the phase difference between the first timing and the second timing is yT, y is a positive number, and T is a channel bit which is a basic unit for a recording mark length on an optical disk; wherein, if |y|>|w| is established as a relationship between the detected phase difference yT and a preset permissible cycle error value wT of a sync signal detected in the track reproduction signal and w is a positive number, the controller is configured to control writing of data on a recording area using a preset reserved area or an empty area on the optical disk; and wherein, if |y|≦|w| is established, the controller is configured to control writing of data to a target track on the optical disk.