System and method for acoustic echo cancellation
US9928847B1 · kind B1 · utility
12Cited by
0References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 4, 2017 |
| Grant date | Mar 27, 2018 |
| Priority date | — |
| Expiry date | Aug 4, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/20
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An audio or video conferencing system having an array comprised of two or more microphones and having one or more loudspeakers positioned proximate to the microphones. The conferencing system also has acoustic echo cancellation (AEC) functionality that removes direct and reverberant acoustic echo from microphone signals in two separate acoustic echo cancellation operations. The first AEC operation removes direct acoustic echo prior to a beamforming operation, and the second AEC operation removes reverberant acoustic echo from a microphone signal subsequent to the beamforming operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.