Digital signal detection circuit
US5661709A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1996 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Jul 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital signal detection circuit includes a threshold value calculator calculating a threshold value from assumptive sampled values corresponding to various data patterns of a regenerated signal. The regenerated signal is obtained by regenerating data recorded on a recording medium by a regenerating head. The detection circuit also includes a Viterbi decoder carrying out Viterbi decoding of the regenerated signal with the threshold value determined by the threshold value calculator as a constant. The threshold value calculator variably controls the threshold value using a decoded output of the Viterbi decoder and a regenerated signal corresponding to the decoded output of the Viterbi decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.