A phonetically based small vocabulary automatic speech recognition system
Walker, K., deSilva, C.J.S., Alder, M., Attikiouzel, Y. and Hallgren, R. (1989) A phonetically based small vocabulary automatic speech recognition system. In: TENCON '89. Fourth IEEE Region 10 International Conference, 22 - 24 November, Bombay, India pp. 765-768.
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A description is presented of a speaker independent automatic speech recognition system for a small vocabulary, employing phonetically based methods. The system uses formant tracking and relative energy values to characterize each word in the vocabulary (the digits, 0 to 9) and also a ratio of energies in the top and bottom half of the frequency band to detect fricatives. The formants are tracked by the second derivative of a smoothed FFT (fast Fourier transform). The system was tested on a number of speakers of both sexes, with encouraging results. Conclusions are drawn about the general feasibility of a formant based approach to automatic speech recognition
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|Copyright:||© 1989 IEEE|
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