System and method for blind subband acoustic echo cancellation postfiltering
US8189766B1 · kind B1 · utility
20Cited by
150References
21Claims
0Family size
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Key dates
| Filing date | Dec 21, 2007 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Dec 8, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/085
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Systems and methods for blind subband acoustic echo cancellation postfiltering in a communication device are provided. In exemplary embodiments, an acoustic signal is received via a microphone of the communication device. Acoustic echo cancellation (AEC) is applied to the acoustic signal to obtain an AEC masked signal. Because residual echo may still exist in the AEC masked signal, blind subband AEC postfiltering on the AEC masked signal may be performed to obtain an echo-free acoustic signal. The echo-free signal may then be output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.