Title :
Acoustic echo control. An application of very-high-order adaptive filters
Author :
Breining, Christina ; Dreiscitel, P. ; Hänsler, Eberhard ; Mader, Andreas ; Nitsch, Bernhard ; Puder, Henning ; Schertler, Thomas ; Schmidt, Gerhard ; Tilp, Jan
Author_Institution :
Dept. of Electr. Eng., Darmstadt Univ. of Technol., Germany
fDate :
7/1/1999 12:00:00 AM
Abstract :
We have discussed the application of high-order adaptive filters to the problem of acoustical echo cancellation with particular application to hands free telephone systems. We described a means to achieve robust performance. We further presented methods for reducing computational complexity that allow implementation in low-cost, fixed-point digital signal processors. Progress in technology will allow the use of more sophisticated algorithms at lower cost in the near future
Keywords :
FIR filters; acoustic filters; adaptive filters; computational complexity; echo suppression; fixed point arithmetic; telephony; acoustic echo control; acoustical echo cancellation; computational complexity; hands free telephone systems; high-order adaptive filters; low-cost fixed-point digital signal processors; performance; Adaptive filters; Attenuation; Delay effects; Echo cancellers; Finite impulse response filter; Loudspeakers; Microphone arrays; Speech; Switches; Telephony;
Journal_Title :
Signal Processing Magazine, IEEE
