Patent ID: 6061313
Filing Date: 2000-05-09
Classification: G11B

Abstract:
An optical disk drive for accessing a recordable optical disk based on a reflection beam from the disk when a laser beam is emitted to the disk, comprising:a first detection unit for detecting a first time signal and a first error signal, the first time signal indicating a time code of pregrooves of the disk, the first error signal being indicative of an error of the first time signal;a second detection unit for detecting a second time signal and a second error signal, the second time signal indicating a time code of recorded data of the disk, the second error signal being indicative of an error of the second time signal;a time determination unit connected to both the first detection unit and the second detection unit for determining the first time signal as being a current time when no error of the first time signal is indicated by the first error signal, and for determining the second time signal as being the current time when an error of the first time signal is indicated by the first error signal and no error of the second time signal is indicated by the second error signal;a comparator for detecting whether the current time determined by the time determination unit matches with a target time; andan encoder for starting writing data to the disk when a coincidence of the current time and the target time is detected by the comparator.