TY - GEN
T1 - Combined speech recognition and speaker verification over the fixed and mobile telephone networks
AU - Kounoudes, Anastasis
AU - Antonakoudi, Anixi
AU - Kekatos, Vassilis
AU - Peleties, Philippos
PY - 2006
Y1 - 2006
N2 - A double-digit text-dependent speaker verification and text validation system is presented for use in telephone services. The system utilizes concatenated phoneme HMMs for both speech recognition and user authentication, and works in a soundprompted mode. Tests with Hidden Markov Models (HMMs) using Perceptual Linear Prediction (PLP) and Mel Frequency Cepstral Coefficients (MFCC) as well as Cepstral Mean Subtraction (CMS) are performed to assess their effect on recognition performance. The paper also studies the effects of various factors such as the length of the training data, the number of embedded re-estimations and Gaussian mixtures in training of the HMMs, the use of world models, bootstrapping, and user-depended thresholds on the performance of speech recognition and speaker verification.
AB - A double-digit text-dependent speaker verification and text validation system is presented for use in telephone services. The system utilizes concatenated phoneme HMMs for both speech recognition and user authentication, and works in a soundprompted mode. Tests with Hidden Markov Models (HMMs) using Perceptual Linear Prediction (PLP) and Mel Frequency Cepstral Coefficients (MFCC) as well as Cepstral Mean Subtraction (CMS) are performed to assess their effect on recognition performance. The paper also studies the effects of various factors such as the length of the training data, the number of embedded re-estimations and Gaussian mixtures in training of the HMMs, the use of world models, bootstrapping, and user-depended thresholds on the performance of speech recognition and speaker verification.
KW - Biometrics
KW - Hidden markov models
KW - Speaker verification
KW - Text validation
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M3 - Conference contribution
AN - SCOPUS:33847178385
SN - 0889865477
SN - 9780889865471
T3 - Proceedings of the Third IASTED International Conference on Signal Processing, Pattern Recognition, and Applications
SP - 228
EP - 233
BT - Proceedings of the Third IASTED International Conference on Signal Processing, Pattern Recognition, and Applications
T2 - 3rd IASTED International Conference on Signal Processing, Pattern Recognition, and Applications
Y2 - 15 February 2006 through 17 February 2006
ER -