Auto-tuning of acoustic echo canceller
US10686942B2 · kind B2 · utility
2Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 2019 |
| Grant date | Jun 16, 2020 |
| Priority date | — |
| Expiry date | May 13, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/08
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A gain control system for dynamically tuning an echo canceller, the echo canceller being configured to estimate an echo of a far-end signal and subtract that echo estimate from a microphone signal to output an echo cancelled signal, the gain control system comprising a monitoring unit configured to estimate an energy associated with an impulse response of an adaptive filter configured to generate the echo estimate from the far-end signal and a gain tuner configured to adjust an attenuation of at least one of the microphone signal and the far-end signal in dependence on the estimated energy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.