Noise estimation algorithm for non-stationary environments
US9172791B1 · kind B1 · utility
4Cited by
1References
14Claims
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Key dates
| Filing date | Apr 24, 2014 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Apr 24, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03687
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Features are disclosed for estimating a noise level using a variable step size. An acoustic echo canceller (AEC) may be configured to perform echo cancellation. The acoustic echo canceller may determine an estimated echo using a playback signal. The acoustic echo canceller also may determine an estimated error using the estimated echo and a microphone signal. A variable step size may be determined using the estimated error and the microphone signal. Noise reduction may be performed using the variable step size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.