Speech recognition in noisy environments with the aid of microphone arrays
Speech Communication
Microphone array speech enhancement in overdetermined signal scenarios
ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: speech processing - Volume II
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This paper describes a microphone array for speech recording in car environments. The array is designed for hands-free radiotelephone, and is also used as a front-end for an automatic speech recognition system. We describe the configuration of the array and the adaptive beamforming technique that we have implemented. In the last section, we evaluate the performances of the array. The measure of performance is the score obtained with a speech recognition system. Within the european ESPRIT project ARS "Adverse environment recognition of speech", a prototype of this microphone array was built. It has 8 microphones, and works in real time, using one TMS C30 processor.