Cross-domain processing for noise and echo suppression
US9020144B1 · kind B1 · utility
8Cited by
4References
19Claims
0Family size
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Key dates
| Filing date | Mar 13, 2013 |
| Grant date | Apr 28, 2015 |
| Priority date | — |
| Expiry date | Mar 13, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An audio-based system may perform noise and echo suppression by initially processing an audio signal that is subject to acoustic echo or echo resulting from other system characteristics. The audio signal is processed in the time domain using an adaptive echo-cancellation filter. The audio is then further processed in the frequency domain to simultaneously reduce background noise and residual echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.