Cell-based beamforming (CE-BABE) for speech acquisition with microphone arrays

This paper introduces a microphone array processing method that possesses the robustness of fixed beamforming along with the ability to be dynamically reconfigured to limit interference and reverberation. The basic approach is to partition the environment into two regions: an interior region (contai...

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Bibliographic Details
Published in:IEEE transactions on speech and audio processing 2000-11, Vol.8 (6), p.738-743
Main Authors: Brandstein, M.S., Ward, D.B.
Format: Article
Language:English
Subjects:
Acoustic beams
Acoustic signal processing
Acoustics
Applied sciences
Array signal processing
Arrays
Beamforming
Exact sciences and technology
Exteriors
Fundamental areas of phenomenology (including applications)
Information, signal and communications theory
Interference
Interference cancellation
Interference constraints
Microphone arrays
Microphones
Physics
Reverberation
Robustness
Sensor arrays
Signal processing
Simulation
Speech
Speech enhancement
Speech processing
Speech processing and communication systems
Telecommunications and information theory
Working environment noise
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Summary:This paper introduces a microphone array processing method that possesses the robustness of fixed beamforming along with the ability to be dynamically reconfigured to limit interference and reverberation. The basic approach is to partition the environment into two regions: an interior region (containing sources that are physically present within the room enclosure), and an exterior region (containing virtual sources of reverberation). The interior region is further divided into cells, and standard source localization techniques are used to identify those cells containing the desired source as well as sources of interference (e.g., competing talkers). Beamforming weights are then found to pass the desired signal, while simultaneously minimizing a weighted combination of interior interference and exterior reverberation. Simulation results are presented to demonstrate the effectiveness of the proposed technique when compared with conventional beamforming methods.
ISSN:1063-6676
2329-9290
1558-2353
2329-9304
DOI:10.1109/89.876312