Title :
Strategies for combining acoustic echo cancellation and adaptive beamforming microphone arrays
Author :
Kellermann, Walter
Author_Institution :
Fachhochschule Regensburg, Germany
Abstract :
New concepts for efficient combination of acoustic echo cancellation (AEC) and adaptive beamforming microphone arrays (ABMA) are presented. By decomposing common beamforming methods into a time-invariant part, which the AEC can integrate, and a separate time-variant part, the number of echo cancellers is minimized without rendering the system identification problem more difficult. Methods for controlling the interaction of ABMA and AEC are outlined and implementations for typical microphone array applications are discussed
Keywords :
acoustic signal processing; acoustic transducer arrays; array signal processing; direction-of-arrival estimation; echo suppression; microphones; acoustic echo cancellation; adaptive beamforming microphone arrays; beamforming methods; echo cancellers; hands-free telecommunication system; microphone array applications; system identification problem; time-invariant method; time-variant method; Acoustic arrays; Adaptive arrays; Array signal processing; Attenuation; Echo cancellers; Frequency; Loudspeakers; Microphone arrays; Samarium; Sensor arrays;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1997. ICASSP-97., 1997 IEEE International Conference on
Conference_Location :
Munich
Print_ISBN :
0-8186-7919-0
DOI :
10.1109/ICASSP.1997.599608
