Adaptive spatial classifier for multi-microphone systems
US9378754B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2010 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Nov 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A robust noise suppression system may concurrently reduce noise and echo components in an acoustic signal while limiting the level of speech distortion. The system may receive acoustic signals from two or more microphones in a close-talk, hand-held or other configuration. The received acoustic signals are transformed to cochlea domain sub-band signals and echo and noise components may be subtracted from the sub-band signals. Features in the acoustic sub-band signals are identified and used to generate a multiplicative mask. The multiplicative mask is applied to the noise subtracted sub-band signals and the sub-band signals are reconstructed in the time domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.