3aEA2. Acoustic echo cancellation for duplex audio communication.

Session: Wednesday Morning, May 15

Time: 8:35

Author: Steven L. Gay
Location: Bell Labs., Lucent Technologies, 600 Mountain Ave., Murray Hill, NJ 07974


This paper reviews the problems associated with the application of acoustic echo cancellation to duplex hands-free audio communication. The more popular approaches to the solution of these problems are reviewed as well. In particular, the problems discussed include the effects of communication channels on the human perception of echo, characteristics of the acoustic echo path, double-talk, and stability. The methods which address these obstacles are fast-converging, low-complexity long adaptive filters, double-talk detectors, and suppression and clipping techniques.

from ASA 131st Meeting, Indianapolis, May 1996