Method and device for echo cancellation using power estimation in a residual signal
US6195430A · kind A · utility
27Cited by
8References
9Claims
0Family size
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Key dates
| Filing date | Jun 17, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Jun 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/23
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An echo canceller determines a dynamic threshold that depends on a non-linear error power estimate and also a linear error power estimate. A residual power estimate of a residual signal is compared to this dynamic threshold. The residual signal is attenuated in a non-linear processor if the residual estimate falls below the dynamic threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.