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Spontaneous speech recognition for the credit card corpus using the HTK toolkit

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3 Author(s)
Young, S.J. ; Dept. of Eng., Cambridge Univ., UK ; Woodland, P.C. ; Byrne, W.J.

This paper describes a speech recognition system for the credit card corpus which was provided as a baseline for the Summer Workshop on Robust Speech Processing held at the Rutgers CAIP Center in July/August 1993. The system was built using a portable HMM toolkit called HTK. This is described, along with details of the training and testing methods used. Benchmark performance results are presented for mixture Gaussian monophones and tied-state triphones using four different language models. The overall accuracy levels achieved were very low, indicating that this is a very difficult recognition task. The paper concludes with a discussion of some specific problems encountered with the Credit Card data and suggestions for future work

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Speech and Audio Processing, IEEE Transactions on  (Volume:2 ,  Issue: 4 )