Sixth European Conference on Speech Communication and Technology
Through the present paper, the evaluation results of a Speaker Independent Robust-to-Noise Isolated Word Recognizer are presented. The system, which is in part the results achieved by the project IVORY (ESPRIT project No. 20277) , is intended for working in highly non-stationary environments. The system comprises two main modules: the Noise Cancellator and the Speech Recognizer itself. System robustness is achieved in the noise cancellation module. This module incorporates an Adaptive Filter  , operating in the time domain, and a subsequent Spectral Subtraction step  operating in the frequency domain with the enhanced signal provided by the previous stage. Recognition results for different noise cancellation configurations and for several Parameter Extraction Front-Ends, including LPC , FFT Cepstrum  and PLP based methods  are presented.
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Bibliographic reference. Álvarez, A. / Martínez, R. / Gómez, P. / Nieto, V. / Pérez, M. M. (1999): "A robust isolated word recognizer for highly non-stationary environments. recognition results", In EUROSPEECH'99, 2817-2820.