Noise matching for echo cancellers
US7627111B2 · kind B2 · utility
4Cited by
12References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 25, 2002 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | Sep 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/23
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An embodiment of the present invention includes an adaptive predictor, a system white noise generator, and a background noise estimator. The adaptive predictor estimates adaptive weights of autoregressive (AR) model of background noise as background samples in an echo canceler. The adaptive predictor generates adaptive error. The system white noise generator generates a white noise using the adaptive error. The noise background estimator estimates the background noise using the white noise and the estimated adaptive weights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.