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Noisy speech recognition system for car cellular phone

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2 Author(s)
Sankar, Ravi ; Dept. of Electr. Eng., Univ. of South Florida, Tampa, FL, USA ; Sethi, N.S.

In this paper we present the development of robust speech recognition techniques for voice activated dialing (VAD) for a cellular phone in a car. Noise reduction techniques are implemented before modeling the speech parameters in the homomorphic domain. The FFT derived cepstral coefficients are lifted and then Mel-scale warped to generate the feature vector. A radial basis function neural network is used as final classifier and the variation in its structure is studied to evaluate its real-time performance. Results on speaker-dependent and speaker-independent recognition across -5 dB to 25 dB SNR range are presented and a performance evaluation is carried out for different front-end techniques. The system is evaluated using the NOISEX-92 database

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Vehicular Technology Conference, 1999. VTC 1999 - Fall. IEEE VTS 50th  (Volume:4 )

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