Method and associated apparatus and medium for optical recording and reproducing information
US4949325A · kind A · utility
16Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1988 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Mar 17, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a method of recording/reproducing information associated with an apparatus and recording medium, the medium has an alternate formation including tracks of first regions wherein at least an optical record of preformatted pits at a constant time interval is recorded and second regions in which information is recorded so that optical retrieval can be achieved. A clock signal is generated based on the readout signal of the preformatted pits to record an information signal in the second regions, and the clock signal is retarded and used to read out data pits that are the record of the information in the second regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.