Method of generating a recording pulse train in accordance with a NRZI signal for recording information to a recording medium
US7609602B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2005 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Nov 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0062
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of generating a recording pulse train in accordance with a NRZI signal for recording information to a recording medium by irradiating a pulse chain including a first pulse, a middle pulse chain, a last pulse and a negative pulse following the last pulse, including adjusting an average power of the first pulse to a designated peak power level, adjusting an average power of the middle pulse chain to a designated peak power level, adjusting an average power of the last pulse to a designated power level, adjusting an average power of the negative pulse to a designated power level that is lower than the peak power level, and controlling a leading edge of the first pulse of the recording pulse train to start with a variable lapse of time from a leading edge of the NRZI signal, with a duration of the first pulse being fixed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.