Sound pickup apparatus and echo cancellation processing method
US8238547B2 · kind B2 · utility
150Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 2005 |
| Grant date | Aug 7, 2012 |
| Priority date | — |
| Expiry date | Apr 27, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/345
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A sound pickup apparatus selecting one of a plurality of microphones and performing echo cancellation processing for a plurality of microphones with an echo canceller to output a sound. The sound pickup apparatus sets a “learning mode” when the power supply is turned on, outputs a calibration sound from an echo cancellation calibration sound generator via a speaker, detects an echo at that time with a microphone and obtains an echo cancellation use parameter canceling the echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.