Least Squares Equalizer Design under Consideration of Tail Effects

Authors: S. Goetze, M. Kallinger, K.-D. Kammeyer, A. Mertins

Modern high-quality hands-free telecommunication systems have to cope with several real-world problems, such as corruption of the desired signal by additive noise, acoustic echoes and reverberation. This paper addresses the mutual impacts of the subsystems for acoustic echo cancellation and listening-room compensation. In acoustic systems for listening-room compensation the equalizer is placed in front of the loudspeaker. An estimate of the room impulse response is necessary for the equalizer to compensate for the influence of the room impulse response at the position of the reference microphone where the human user is located. Since the room impulse response is identified by the acoustic echo canceller anyway, its estimate can be used to design the equalizer. The quality of qualization in dependence of the degree of system identification will be investigated in this contribution. Furthermore, the influence of the equalizer on an echo canceller is analyzed.

Document type: Conference Paper
Publication: Stuttgart, Germany, 19. - 22. March 2007
Conference: 33rd German Annual Conference on Acoustics (DAGA 07)
Pages: 599-600
Index: 272
DAGA_2007_goetze.pdf215 KBDAGA_2007_goetze.ps652 KB
Last change on 15.01.2010 by S. Goetze
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