Study on Combining Multi-Channel Echo Cancellers with Beamformers

Authors: M. Kallinger, J. Bitzer, K.-D. Kammeyer
Abstract: In this paper, we will compare different combinations of
a multi-channel non-adaptive noise reduction unit (NRU)
and an acoustic echo cancellation unit (AEC) for a standard
single-channel voice transmission. The results show that
the NRU and the AEC-unit can be interchanged without increasing
the computational complexity of the combined system.
The length of an AEC’s adaptive filter can be greatly
reduced, if a multi-channel AEC-unit in front of a multichannel
NRU is used. Furthermore, the control information,
like the step-size of the NLMS-algorithm, has to be
computed only once.
Document type: Conference Paper
Publication: Istanbul, Turkey, 5. - 9. June 2000
Conference: International Conference on Acoustics Speech and Signal Processing (ICASSP 2000)
Index: 90
ICASSP_2000_kallinger.pdf160 KB
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