Optical recording medium having a data recording track with offset data storing regions
US5148422A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1990 |
| Grant date | Sep 15, 1992 |
| Priority date | — |
| Expiry date | Aug 21, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium for storing optically readable data includes at least one preformed recording track of predetermined width and extending in a predetermined recording direction, the recording track having a recordable region extending in the recording direction thereof for recording data containing clock signal components, the recording track being provided with predetermined offset portions extending in the direction of the width thereof representing offset recorded data, the offset portions being formed such that the offset recorded data has a frequency upon scanning the recording track related by an integral ratio with respect to the clock signal components of the data. When principal information signals are recorded on the track of the recording medium, clock signals are produced with the use of the offset recorded data and, when the principal information signals are reproduced from the recording medium, the offset recorded data are used for accessing, so that record and reproduce clocking may be produced from signals wholly apart from the principal information signals recorded in the recording track. In addition, by providing offset portions of the recording tracks,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.