Second European Conference on Speech Communication and Technology

Genova, Italy
September 24-26, 1991


Acoustic Echo Cancellation Using Prediction Residual Signals

C. Acker, Peter Vary, H. Ostendarp

Institute for Communication Equipment and Data Processing, Technical University of Aachen, Aachen, Germany

Adaptive echo cancellers are currently being studied for application to hands-free telephone sets with high speech quality. The major problem is the acoustic echo control from the loudspeaker to the microphone. This proposal presents a new concept by using linear prediction techniques in combination with a conventional adaptive echo canceller. Computer simulations show that the introduced algorithm improves significantly the performance compared to conventional methods. In this paper the new structure is described. A comparison of the results with the state of the art indicates that the complexity can be reduced by one third.

Full Paper

Bibliographic reference.  Acker, C. / Vary, Peter / Ostendarp, H. (1991): "Acoustic echo cancellation using prediction residual signals", In EUROSPEECH-1991, 1297-1300.