Attenuation of output audio based on residual echo
US9319783B1 · kind B1 · utility
6Cited by
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24Claims
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Key dates
| Filing date | Feb 19, 2014 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Jun 30, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04S2400/13
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Residual echo that remains after an echo cancellation process may interfere with speech recognition. If near-end speech is detected in an audio input signal, a controller may attenuate the audio playback signal. Too much attenuation may disturb playback, whereas too little attenuation may not improve speech recognition. Accordingly, features are disclosed for attenuating an audio playback signal based at least in part on residual echo level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.