Apparatus and method for controlling an acoustic echo canceler
US6650701B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 2000 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Jan 14, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H2021/0074
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and associated apparatus for controlling an acoustic canceler (“AEC”) are disclosed. Prior to passing audio signals to the AEC, a distortion detector is used to determine if the signals are distorted. If so, the AEC does not adapt is filter coefficients to the distorted signals. This technique improves the AEC's ability to adapt its filter coefficients to subsequent undistorted signals. For example, near-end or far-end audio signals above a predetermined threshold value are detected by a distortion detector which disables adaptive filter control logic so that distorted signals do not result in generation of erroneous filter coefficients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.