Frequency-dependent bursting in adaptive echo cancellation and its prevention using double-talk detectors
Article first published online: 5 MAR 2007
Copyright © 1990 John Wiley & Sons, Ltd.
International Journal of Adaptive Control and Signal Processing
Volume 4, Issue 3, pages 219–236, May/June 1990
How to Cite
Ding, Z., Johnson, C. R. and Sethares, W. A. (1990), Frequency-dependent bursting in adaptive echo cancellation and its prevention using double-talk detectors. Int. J. Adapt. Control Signal Process., 4: 219–236. doi: 10.1002/acs.4480040304
- Issue published online: 5 MAR 2007
- Article first published online: 5 MAR 2007
- Manuscript Revised: 8 AUG 1989
- Manuscript Received: 1 DEC 1988
- NSF. Grant Number: MIP-8608787
- Double-talk detector;
- Adaptive echo cancellation
Echo cancellation in telephone communications can often be accomplished by using adaptive network echo cancellers. However, under certain circumstances, these generally effective echo cancellers can cause an undesirable bursting phenomenon. In this paper the essential driving force behind bursting is attributed to the correlation between the signal the near-end is to transmit and the signal the near-end receives from the far-end. This correlation and the subsequent potential for temporary destabilization arise as a result of the feedback loop structure of the four-wire telephone circuit. A new test signal which approximately measures this correlation is proposed for use in the double-talk detector scheme that is commonly used to halt adaptation before a mishap such as bursting occurs.