Robust adaptive beamforming with enhanced noise suppression
US8005238B2 · kind B2 · utility
62Cited by
10References
20Claims
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Key dates
| Filing date | Mar 22, 2007 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | May 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A novel adaptive beamforming technique with enhanced noise suppression capability. The technique incorporates the sound-source presence probability into an adaptive blocking matrix. In one embodiment the sound-source presence probability is estimated based on the instantaneous direction of arrival of the input signals and voice activity detection. The technique guarantees robustness to steering vector errors without imposing ad hoc constraints on the adaptive filter coefficients. It can provide good suppression performance for both directional interference signals as well as isotropic ambient noise.
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