Method and apparatus for reading and writing a multi-level signal from an optical disc
US6275458A · kind A · utility
20Cited by
4References
18Claims
0Family size
Inventors
Key dates
| Filing date | Feb 18, 1999 |
| Grant date | Aug 14, 2001 |
| Priority date | — |
| Expiry date | Feb 18, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2537
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method are disclosed for reading a multilevel signal from an optical disc. The method includes reading a raw analog data signal from a disc using an optical detector and adjusting the amplitude of the raw analog data signal. A timing signal is recovered from the amplitude adjusted analog data signal and correction is made for amplitude modulation of the raw analog data signal by processing the raw analog data signal and the timing signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.