Method and apparatus for determining if an optical disk originated from a valid source
US7372986B2 · kind B2 · utility
1Cited by
8References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2004 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Apr 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/865
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for determining if an optical disk originated from a valid source, the method and apparatus scanning one major surface of the optical disk for mechanical surface imperfections, storing the locations of the surface imperfections relative to a datum, comparing a parameter of each of the locations of the surface imperfections with corresponding parameters of a master disk of known source for determining if the disk originated from the source from which the master disk originated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.