Echo suppression
US9154873B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 2013 |
| Grant date | Oct 6, 2015 |
| Priority date | — |
| Expiry date | Nov 17, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method, user device and computer program product for suppressing echo. An audio signal is outputted from a speaker. A microphone receives an audio signal which includes echo resulting from said outputted audio signal. An echo path of the echo is modelled using a plurality of models. A first of the models is a FIR based model and a second of the models is different to the first model. The first model is used to determine a first model estimate of the echo power of a first component of the echo. The second model is used to determine a second model estimate of the echo power of a second component of the echo. The first and second model estimates of the echo power are combined. The combined estimate of the echo power is used to apply echo suppression to the received audio signal, thereby suppressing the echo.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.