Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type
US4866692A · kind A · utility
109Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1987 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Aug 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10595
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for recording and reproducing information for use with an optical disk apparatus in which a pit edge recording method is used. According to the pit edge recording method, the leading edge and the trailing edge of a hole pit or a record domain generated during a recording operation are dealt with as information. During the recording, the recording pulse width and the recording power are corrected, and during the reproduction, the variation in the edge position is corrected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.