Detecting acoustic echoes using microphone arrays
US7630503B2 · kind B2 · utility
10Cited by
11References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2004 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Nov 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/23
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for discriminating between the case of a single talker with an acoustic reflection and the case of two talkers, regardless of their power levels. The method is implemented in real time by performing a cross-correlation between pairs of average power signals originating from pairs of beamformers. A detection decision is then made based on the value of the cross correlation and its lag.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.