Information recording method and an information recording apparatus
US7301870B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 10, 2004 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Mar 16, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0045
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording method where different optimum recording power levels are determined for different mark lengths.At a first trial writing process, first predetermined test data, from which a specific pattern, e.g., 3T is removed, are written with recording power levels being shifted, and a first optimum recording power level is determined based on a reproduction signal of the recorded first test data. Then, at a second trial writing process, second predetermined test data that are constituted by 3T marks are written with the recording power level for the 3T marks being shifted, and with the recording power level for marks other than the 3T marks being set at the first optimum recording level, and a second optimum recording power level for the 3T marks is determined based on a reproduction signal of the recorded second test data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.