Acoustic echo canceler using an accelerometer
US8538008B2 · kind B2 · utility
6Cited by
6References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 2008 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Mar 15, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A system includes a loudspeaker, a microphone, an echo canceling circuit, and an accelerometer coupled to the loudspeaker for providing a reference signal, a(n), to the echo canceling circuit. Preferably, the accelerometer is attached to the loudspeaker. A speaker signal, x(n), is used to drive the loudspeaker and the system also includes a switch for coupling either a(n) or x(n) to the echo canceling circuit, depending upon the volume or loudness of the sounds involved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.