Method and apparatus for control of a write signal in an optical disc system
US7940625B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2005 |
| Grant date | May 10, 2011 |
| Priority date | — |
| Expiry date | Sep 3, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/1263
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides for an apparatus and method of controlling writing a signal to an optical disc in an optical disk system and including the step of generating a feedback signal to dynamically tune the signal output from a laser source, and including generating a plurality of timing signals serving to define a plurality of sampling windows for selecting data samples from RF signals derived from a signal reflected from the disc, generating a plurality of runlength selection signals to allow for measurement of light reflection at required runlength lands or pits, and measuring light reflected at a runlength land or pit in processing means and employing the measured signal as the said feedback signal for the said tuning of the signal source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.