Adaptive echo canceller
US4633046A · kind A · utility
20Cited by
6References
3Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 16, 1984 |
| Grant date | Dec 30, 1986 |
| Priority date | — |
| Expiry date | Feb 16, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/238
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In order to prevent tap coefficient values from drifting toward excessively large values or divergence, an adaptive echo canceller is provided with a correction signal controller which (a) reduces the tap coefficient values upon the polarities of the tap coefficient signal and the tap coefficient correction signal coinciding and (b) increases the tap coefficient values upon the polarities differing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.