Acoustic voice activity detection (AVAD) for electronic systems
US8326611B2 · kind B2 · utility
5Cited by
5References
44Claims
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Key dates
| Filing date | Oct 26, 2009 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Apr 25, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L2021/02165
- 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.