Apparatus and method for cancelling cross-talk in signals from optical data storage systems
US5483515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Sep 16, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system is disclosed for canceling cross-talk in a data read signal from an optical data storage medium. The system includes three AD converters for receiving read signals from three read sensors, and the read signals respectively represent data from a center data track and its two adjacent side data tracks on an optical data storage disk. The digitized signals are sent to a skew compensator to remove time skew between the signals. Then, the amplitudes represented by the side track signals are adjusted, and the adjusted side track signals are subtracted from the center track signal to cancel cross-talk in the center track signal which is attributable to data contained in the side data tracks. The center track signal is then equalized to account for the frequency response of the center track read sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.