DocumentCode :
2900347
Title :
Optimization of an acoustic echo canceller combined with adaptive gain control
Author :
Heitkämper, Peter
Author_Institution :
Inst. fur Netzwerk- und Signaltheorie, Tech. Hochschule Darmstadt, Germany
Volume :
5
fYear :
1995
fDate :
9-12 May 1995
Firstpage :
3047
Abstract :
This contribution deals with the application of hands-free algorithms in wide-band telephone systems with limited computing resources. The basis is the combination of an acoustic echo canceller and an adaptive gain control method. The paper describes how the effect of the echo canceller can be optimized without increasing the computational expense. This is achieved by extending the length of the adaptive filter at the cost of a reduced affected frequency range. The study shows to which extent one can concentrate on the low frequency portion of the acoustic echoes in a wide-band application, if a suitable additional gain control method is available. The optimization is accomplished using a simple room model. Real-time measurements were carried out using an implementation of the complete hands-free system on a single DSP
Keywords :
acoustic signal processing; adaptive control; echo suppression; gain control; optimisation; speech processing; telephony; acoustic echo canceller; adaptive filter; adaptive gain control; computing resources; hands-free algorithms; optimization; real-time measurements; simple room model; single DSP; wide-band application; wide-band telephone systems; Acoustic applications; Adaptive control; Adaptive filters; Costs; Echo cancellers; Frequency; Gain control; Programmable control; Telephony; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location :
Detroit, MI
ISSN :
1520-6149
Print_ISBN :
0-7803-2431-5
Type :
conf
DOI :
10.1109/ICASSP.1995.479488
Filename :
479488
Link To Document :
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