| 摘要 |
An optical disk recording device capable of recording data by projecting, laser pulse on a disk such as a CD-WO disk on which time information such as ATIP data or address information used for writing is previously recorded while controlling drive of a spindle for rotating the disk by using the information for writing includes a synchronizing signal detection circuit for detecting a synchronizing signal such as an ATIP synchronizing signal from a signal read from the disk, a clock generation circuit for generating a clock from the read out signal by locking PLL (phase lock loop), a counter for counting the clock generated by the clock generation circuit during a period between respective synchronizing signals detected by the synchronizing signal detection circuit, and a slip detection circuit for detecting a slip in the PLL of the clock generation circuit when a count of the counter differs from a predetermined value. A difference between the time information or address information and recorded data on the disk can be detected in real time, so that a proper processing such as stopping of recording can be made immediately upon detection of the slip in the PLL.
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