Information recording/reproducing apparatus that improves recording/reproducing characteristics
US7336575B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 19, 2004 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Feb 28, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2562
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording/reproducing apparatus includes a use condition determination part that reproduces a specific area on a rewritable recording medium and determines whether an unused area exists. A recording linear velocity changing part changes a recording linear velocity in a radial direction of the medium. A recording clock cycle changing part changes a recording clock cycle in accordance with a change in the velocity. A test writing part performs test writing with a different recording power for each step. An optimum recording power determination part reproduces test-written information and determines an optimum recording power for a recording linear velocity in test writing based on a characteristic value of a reproduction signal. When the unused area exists, test writing is performed thereon at a recording linear velocity the same as that in recording, the optimum recording power for the area is determined, and information is recorded with the optimum recording power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.