Correcting non-linear distortions of optical information with a non-linear equalizer
US5572503A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1994 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Dec 13, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk device which uses a light spot for reproducing data, including photodetector, a decoder, and a non-linear equalizer provided between the photodetector and the decoder for correcting non-linear distortions in a reproduced signal from an optical disk. The non-linear equalizer includes a linear equalizer and a decision feedback equalizer provided after the linear equalizer. The non-linear equalizer includes a detector for detecting a signal on the basis of the output of the linear equalizer with the output of the detector being input to the decision feedback equalizer, the output of which is input to the detector along with the output of the linear equalizer in an additive manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.