Acoustic voice activity detection (AVAD) for electronic systems
US8321213B2 · kind B2 · utility
7Cited by
5References
42Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2009 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Apr 19, 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.