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On using formants to improve SCHMM speaker adaptation

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5 Author(s)
Tae-Young Yang ; Dept. of Electron. Eng., Yonsei Univ., Seoul, South Korea ; Won-Ho Shin ; Weon-Goo Kim ; Dae Hee Youn
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A speaker adaptation algorithm using formant frequencies is proposed. The formants extracted from the cepstral means in the reference codebook are iteratively shifted toward the formants of a test speaker. The number of cepstral means selected at each iteration decreases as the iteration increases. The decision of the number of selected cepstral means and a formant based distance measure are formulated. The proposed algorithm was implemented in two schemes and evaluated by speaker-independent, male speaker dependent, and female speaker-dependent recognition experiments. A combined scheme with the Bayesian adaptation obtained 9.7% enhancement for the average recognition accuracy in speaker-independent experiments and 52.6% in speaker-dependent recognition experiments

Published in:

Speech and Audio Processing, IEEE Transactions on  (Volume:7 ,  Issue: 2 )

Date of Publication:

Mar 1999

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