Echo canceler
US8130941B2 · kind B2 · utility
4Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2009 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Apr 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An echo canceler 10 generates an echo elimination signal by filtering through adaptive filters 101 and 102 reference signals input from sound sources causing echoes. It includes a sound source number detecting unit 103 for detecting the number of the sound sources causing echoes from the reference signals, and a control unit 105 for making the number of taps of the adaptive filters 101 and 102 variable in accordance with the number of the sound sources detected by the sound source number detecting unit 103.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.