Method and system for recording data by a plurality of laser beams on an optical disc
US7755981B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2006 |
| Grant date | Jul 13, 2010 |
| Priority date | — |
| Expiry date | Dec 30, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/08505
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method and system for recording data by a plurality of laser beams (A, B) on an optical disc, said optical disc comprising segments which (1-51) are each identified by a synchronization pattern, said plurality of laser beams comprising at least a first laser beam (A) which has a first position on said optical disc for recording/reading data on a first segment and a second laser beam (B) which has a second position on said optical disc for recording data on a second segment, said method comprising the steps of: —calculating (410) said second position from said first position and the relative distance between said first laser beam and said second laser beam, —detecting (420) a synchronization pattern by said second laser beam, and —starting (430) to record data with said second laser beam on the basis of said second position and said detected synchronization pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.