Speech-recognizer-based filter optimization for microphone array processing

M.L. Seltzer, B. Raj
2003 IEEE Signal Processing Letters  
Conventional microphone-array processing schemes used for speech recognition enhance the output waveform using optimization criteria that are independent of the recognition system. We present a new filter-and-sum array processing algorithm in which the filter parameters are calibrated to maximize recognizer likelihoods. The proposed method provides significant improvement in recognition accuracy over conventional methods. Index Terms-Beamforming, microphone array processing, robust speech
more » ... robust speech recognition.
doi:10.1109/lsp.2002.807877 fatcat:hgrhnt4p4rblbkpqqus2ev7vvq