Methods and devices for updating an adaptive filter for echo cancellation
US9191493B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2013 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Dec 9, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/2475
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods and devices for enabling and disabling updating an adaptive filter for echo cancellation of a communication device are disclosed. An echo canceller may include an adaptive filter that may be enabled to update responsive to a determination that a first condition is satisfied that there is no double talk detected on the communication device, and a determination that a second condition is satisfied based, at least in part, on the performance characteristic. The adaptive filter may be disabled from updating responsive to at least one of the first condition and the second condition not being satisfied. Disabling the adaptive filter from updating may be responsive to detecting a performance characteristic of the adaptive filter to fail to meet a condition indicating that the adaptive filter is diverging. The condition to be met may be independent of whether double-talk is determined to be present on the communication device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.