Noise elimination method
US5285165A · kind A · utility
Inventors
Key dates
| Filing date | Jul 14, 1992 |
| Grant date | Feb 8, 1994 |
| Priority date | — |
| Expiry date | Jul 14, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method for eliminating noise in a signal. The frequency band of the signal is divided into sub-bands, whereafter the useful value of the signal of each sub-band is determined by comparing the signal level to a reference level, in which case a constant signal of substantially the same level as the reference level is suppressed as noise and a varying signal, defined as a useful signal, is combined, unsuppressed, with the useful signals of the other sub-bands. The frequency band of the channel is divided into sub-bands by means of an all-pass filter construction. The method can be implemented using an analog or a digital filter construction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.