Optical disk recording device
US5553042A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1994 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Jun 17, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/19
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.