Information recording and reproduce apparatus
US6552972B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2000 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Mar 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0901
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording and reproducing apparatus that maintains high reliability in tracking offset control during recording and reproduction, which is insufficient in methods of the conventional art due to dissimilar characteristics of high density optical disks versus the amount of track offset occurring during radial tilt as well as crosstalk and cross-erase characteristics. The apparatus has a track offset adjustment circuit for adjusting the track offset during recording and does not adjust the track offset during reproduction. Turning the offset adjustment circuit on during recording prevents increased cross-erasure, while turning the offset adjustment circuit off during reproducing expands the margin versus crosstalk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.