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This letter describes a preprocessing method called subband-based stationary-component suppression method using harmonics and power ratio (SHARP) processing for reverberant speech recognition. SHARP processing extends a previous algorithm called Suppression of Slowly varying components and the Falling edge (SSF), which suppresses the steady-state portions of subband spectral envelopes. The SSF algorithm...
In this paper we present a new method of signal processing for robust speech recognition using two microphones. The method, loosely based on the human binaural hearing system, consists of passing the speech signals detected by two microphones through bandpass filtering. We develop a spatial masking function based on normalized cross-correlation, which provides rejection of off-axis interfering signals...
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