Record medium and reproducing apparatus of the same for detecting an offset correction
US6621772B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2000 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Dec 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10563
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magneto-optical record medium and a reproducing apparatus for the same allow data reproduction having good characteristics by a simple structure. The magneto-optical record medium includes a plurality of first grooves (3) each having sidewalls, at least one of which is wobbled in accordance with address information; an address mark (21) formed by changing a width of a land located between second grooves connected to the first grooves; and third grooves wobbled cyclically, formed in a data portion magnetically storing data and connected to the second grooves. The reproducing apparatus reproduces the data from the magneto-optical record medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.