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Journal Articles IEEE Signal Processing Letters Year : 2010

Multitaper Estimation of Frequency-Warped Cepstra With Application to Speaker Verification

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Abstract

Usually the mel-frequency cepstral coefficients are estimated either from a periodogram or from a windowed periodogram. We state a general estimator which also includes multitaper estimators.We propose approximations of the variance and bias of the estimate of each coefficient. By using Monte Carlo computations, we demonstrate that the approximations are accurate. Using the proposed formulas, the peak matched multitaper estimator is shown to have low mean square error (squared bias + variance) on speech-like processes. It is also shown to perform slightly better in the NIST 2006 speaker verification task as compared to the Hamming window conventionally used in this context.
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Dates and versions

ensl-00475928 , version 1 (23-04-2010)

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Johan Sandberg, Maria Hansson-Sandsten, Tomi Kinnunen,, Rahim Saeidi, Patrick Flandrin, et al.. Multitaper Estimation of Frequency-Warped Cepstra With Application to Speaker Verification. IEEE Signal Processing Letters, 2010, 17 (4), pp.343-346. ⟨10.1109/LSP.2010.2040228⟩. ⟨ensl-00475928⟩
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