Optical disk control apparatus
US4669075A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1985 |
| Grant date | May 26, 1987 |
| Priority date | — |
| Expiry date | Feb 1, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk control apparatus which makes it possible to record and play back the data of a sector when a sector signal representative of the start of the sector is missing. A timer detects an overtime in the time intervals between sector signals due to a missing sector signal due to a defect in an optical disk or the like. A one-shot circuit is provided to produce a simulation sector signal similar to the normal sector signals when an overtime is detected. A combining circuit is connected to receive either the normal sector signals or the simulation sector signals and delivers the signals to a control circuit so as to enable the control circuit to operate the apparatus continuously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.