Device and program for checking optical disks
US7092333B2 · kind B2 · utility
2Cited by
7References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 16, 2002 |
| Grant date | Aug 15, 2006 |
| Priority date | — |
| Expiry date | Apr 15, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2562
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A plurality of tracks on an optical disk are optically read to obtain a signal containing a plurality of LOW segments. Each of the plurality of LOW segments should correspond to a certification pit. Accordingly, if the interval between LOW segment Xj and nth succeeding LOW segment Xj+n exceeds the length of one track, a defect pit that could be confused with a certification pit is judged as being present between two certification pits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.