Title :
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
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on
Conference_Location :
Istanbul
Print_ISBN :
0-7803-6293-4
DOI :
10.1109/ICASSP.2000.859080
