Information-recording medium and information reproducing apparatus
US6807143B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 2000 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Apr 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/00745
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording medium and an information reproduction apparatus that can substantially increase the capacity for recorded information. A preformat pit array 202 exists on the extension of the boundary between a concave portion 103 and a convex portion 104 and includes information on both sectors across the boundary. An adjustment pit array 201 precedes the preformat pit array 202 in the advancing direction of light that reproduces information recorded on an information recording medium. The information reproduction apparatus adjusts the amplifying rate so that the level of a signal from the adjustment pit array 201 becomes equal to a reference level required to reproduce the information correctly. The apparatus then uses this amplifying rate to correctly reproduce the information in the preformat pit array 202.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.