Publications – Details
An Improved Echo Shaping Algorithm for Acoustic Echo Control
- Authors:
- Rainer Martin and Stefan Gustafsson
- Book Title:
- Proceedings of European Signal Processing Conference (EUSIPCO)
- Series:
- Signal Processing VIII - Theories and Applications
- Venue:
- Trieste, Italy
- Date:
- Sept. 1996
- Pages:
- 25–28
- Language:
- English
Abstract
This paper describes and analyses an improved algorithm for hands-free telephony which uses an acoustic echo canceller combined with an additional FIR-filter (called "echo shaping filter") in the sending path of the hands-free telephone. The algorithm controlling the filter is motivated by an approximation of an optimal least squares filter. Simulation results show that the algorithm allows to reduce the order of the echo canceller significantly, still providing high echo attenuation and low distortion of the near end speech signal during double talk. The modulation of the background noise caused by the echo shaping filter can be reduced by adding artificially generated noise to the output signal ("comfort noise").
Download of Publication
Copyright Notice
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
The following notice applies to all IEEE publications:
© IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.