System and process for calibrating a microphone array
US7203323B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 25, 2003 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Nov 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2201/401
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and process for self calibrating a plurality of audio sensors of a microphone array on a continuous basis, while the array is in operation, is presented. In essence, the present microphone array self calibration system and process finds a set of corrective gains that provides the best channel matching amongst the audio sensors of the array by compensating for the differences in the sensor parameters. The present system and process is not CPU use intensive and is capable of providing real-time microphone array self-calibration. It is based on a simplified channel model, projection of sensor coordinates on the direction of arrival (DOA) line, and approximation of received energy levels, all of which speed up processing time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.