System and method for providing close microphone adaptive array processing
US8204252B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Mar 2, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/01
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for adaptive processing of a close microphone array in a noise suppression system are provided. A primary acoustic signal and a secondary acoustic signal are received. In exemplary embodiments, a frequency analysis is performed on the acoustic signals to obtain frequency sub-band signals. An adaptive equalization coefficient may then be applied to a sub-band signal of the secondary acoustic signal. A forward-facing cardioid pattern and a backward-facing cardioid pattern are then generated based on the sub-band signals. Utilizing cardioid signals of the forward-facing cardioid pattern and backward-facing cardioid pattern, noise suppression may be performed. A resulting noise suppressed signal is output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.