Least Squares Equalizer Design under Consideration of Tail Effects

Autoren:

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

Kurzfassung:

In hands-free video conferencing systems acoustic echo cancelers (AECs) have to face the problem of very high-order impulse responModern high-quality hands-free telecommunication sy- stems 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 (LRC). In acoustic systems for LRC the equalizer is placed in front of the loudspeaker. An estimate of the room im- pulse response (RIR) is necessary for the equalizer to compensate for the influence of the RIR at the positi- on of the reference microphone where the human user is located. Since the RIR is identified by the acoustic echo canceller (AEC) anyway, its estimate can be used to design the equalizer. The quality of equalization in dependence of the degree of system identification will be investigated in this contribution. Furthermore the influ- ence of the equalizer on an echo canceller is analyzed.

Dokumenttyp:

Konferenzbeitrag

Veröffentlichung:

Stuttgart, Deutschland, 19. - 22. März 2007

Konferenz:

33rd German Annual Conference on Acoustics (DAGA 07)

Seiten:

599-600

Index:

272

Dateien:

Paper