Systems and methods for noise reduction
US8244523B1 · kind B1 · utility
18Cited by
8References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2009 |
| Grant date | Aug 14, 2012 |
| Priority date | — |
| Expiry date | Apr 11, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/84
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus is shown for detecting speech in an audio signal obtained from an input device, the audio including speech and noise. The apparatus includes a processing circuit which includes a filter configured to smooth the audio signal. The processing circuit is configured to control the bandwidth of the filter based on characteristics of the audio signal and to provide a smoothed signal obtained from the filter to a voice activity detector configured to determine whether the smoothed signal represents speech.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.