Data slice generation method and apparatus for optical disk drive
US7248546B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 2004 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | Jan 20, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10203
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data slice signal generation method of an optical disk drive, which uses a disk including header areas and data areas of different materials, includes the following steps. First, a data slice signal is generated according to the RF signal read by the optical pickup head of the optical disk drive, and the data slice values, reflecting the central levels of the RF signal, of the data slice signal at the beginnings of the header area and data area are preset. Secondly, when the optical pickup head of the optical disk drive enters a header area or a data area, the data slice signal takes the preset data slice value of the header area or data area, respectively. Then, the data slice signal is adjusted to approach the central levels of the waves of the RF signal by one wave after another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.