Updating filter coefficients during echo cancellation
US10313509B2 · kind B2 · utility
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52References
20Claims
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Key dates
| Filing date | Oct 21, 2016 |
| Grant date | Jun 4, 2019 |
| Priority date | — |
| Expiry date | Mar 12, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/2475
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Updating filter coefficients during echo cancellation is disclosed. In some embodiments, a communication device may include a processor configured to operate a background filter configured as an adaptive filter, operate a foreground filter configured as a fixed filter; and update the foreground filter with coefficients from the background filter responsive to monitoring a history of both a near-end signal energy and an estimated far-end signal energy for a pre-determined time window in which conditions of each of the near-end signal energy and the estimated far-end signal energy are satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.