Optical medium recognition system and method with an optical drive having plural lasers
US8264929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2003 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Aug 18, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/122
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical medium associated with a first type of optical drive laser, such as a blue laser, embeds identification information readable by a second type of optical drive laser, such as a red laser associated with DVD media or an IR laser associated with CD media, in order to reduce the time used by the optical drive to recognize media. An attempt to read the embedded identification information by the second laser that succeeds provides the optical drive with the information to proceed with use of the optical medium using the first laser. An attempt to read the embedded identification information that fails provides the optical drive with the opportunity to detect whether the optical medium is associated with the second laser so that a single spindle kick of the optical medium by the optical drive determines whether the optical medium is associated with either of two types of lasers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.