Speech-recognizer-based filter optimization for microphone array processing
Michael L. Seltzer, B. Raj · IEEE Signal Processing Letters · 2003
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.