Reproducing light quantity control method for optical memory device, and reproducing light quantity control device, and optical recording medium
US6392970B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1998 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Jul 23, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10595
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reproducing light quantity control method for an optical memory device includes the steps of (1) recording test data on an optical recording medium; (2) reproducing the test data recorded on the optical recording medium by changing a reproducing light quantity in a plurality of light quantity values; (3) measuring a quality value and a signal quantity of each of a plurality of reproducing signals from the test data; (4) selecting an optimum reproducing signal quantity from a plurality of reproducing signal quantities in accordance with quality values of the plurality of reproducing signals so as to decide a target value of reproducing signal quantity; and (5) recording the target value on a target value recording region of the optical recording medium. This method reduces the time required to obtain a target value of a reproducing signal quantity and speeds up an operation from installing of the optical recording medium to finishing of preparation for recording and reproducing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.