Study on combining multi-channel echo cancellers with beamformers

Author

Kallinger, Markus ; Bitzer, Joerg ; Kammeyer, Karl-Dirk

Author_Institution

Dept. of Telecommun., Bremen Univ., Germany

Volume

2

fYear

2000

fDate

2000

Abstract

In this paper, we 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

Keywords

acoustic signal processing; adaptive filters; array signal processing; computational complexity; echo suppression; speech processing; white noise; AEC-unit; NRU unit; acoustic echo cancellation; adaptive filter; beamformers; computational complexity; control information; multi-channel echo cancellers; multi-channel nonadaptive noise reduction unit; standard single-channel voice transmission; Adaptive filters; Communication system control; Communication systems; Computational complexity; Delay; Echo cancellers; Microphones; Noise reduction; Speech; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on

Conference_Location

Istanbul

ISSN

1520-6149

Print_ISBN

0-7803-6293-4

Type

conf

DOI

10.1109/ICASSP.2000.859080

Filename

859080