Frequency domain acoustic echo cancellation using filters and variable step-size updates
US9036816B1 · kind B1 · utility
7Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2014 |
| Grant date | May 19, 2015 |
| Priority date | — |
| Expiry date | Mar 13, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/082
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A acoustic echo canceller (AEC) system may be configured to perform echo cancellation in the frequency domain. Features are disclosed for determining an estimated echo in the frequency domain using adaptive filters. An adaptive filter corresponding to a frequency bin can comprise a plurality of filter taps. Additional features are disclosed for updating the adaptive filter. In addition, a frequency-bin dependent step size controller may be used to control a step size used in updating the adaptive filters. Features are disclosed for determining the frequency-bin dependent step size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.