Signal dropout compensation
US6304400A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Mar 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Dropout produces amplitude and high frequency loss in the read signal produced by reading a magnetic tape. A system for dropout compensation includes an adaptive filter that filters the read signal using multiplicative weighting factors based on an error signal. A detector receives the adaptive filter output and produces a binary signal indicating data written onto the magnetic tape. A shaping filter receives the binary signal and produces an ideal read signal representing the read signal resulting from writing and subsequently reading the binary signal without dropout. A differencer determines the error signal by subtracting the adaptive filter output from the ideal read signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.