Acoustic voice activity detection (AVAD) for electronic systems
US11627413B2 · kind B2 · utility
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Key dates
| Filing date | Nov 5, 2012 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Oct 9, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2025/937
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Acoustic Voice Activity Detection (AVAD) methods and systems are described. The AVAD methods and systems, including corresponding algorithms or programs, use microphones to generate virtual directional microphones which have very similar noise responses and very dissimilar speech responses. The ratio of the energies of the virtual microphones is then calculated over a given window size and the ratio can then be used with a variety of methods to generate a VAD signal. The virtual microphones can be constructed using either an adaptive or a fixed filter.
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