Multipath noise reducer, audio output circuit, and FM receiver
US6725027B1 · kind B1 · utility
14Cited by
14References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2000 |
| Grant date | Apr 20, 2004 |
| Priority date | — |
| Expiry date | Dec 12, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1081
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A multipath noise reducer detects and removes the individual noise spikes occurring in an interval of multipath noise, thereby reducing the multipath noise with minimal distortion of the audio output signal. The multipath noise spikes are detected by comparing a rectified signal with a threshold signal derived from the rectified signal. When the multipath noise reducer is used in an FM stereo radio receiver, stereo separation may also be controlled according to the detection of multipath noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.