Optical disc and optical disc drive
US6327240A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 19, 1998 |
| Grant date | Dec 4, 2001 |
| Priority date | — |
| Expiry date | Jun 19, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density. The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.