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ICASSP
2011
IEEE

ON the recovery of time-varying spectral envelope information from AQHM-derived spectra

10 years 5 months ago
ON the recovery of time-varying spectral envelope information from AQHM-derived spectra
Spectral envelopes of speech signals are typically obtained by making stationarity assumptions about the signal which are not always valid. The Adaptive Quasi-Harmonic Model (AQHM), a non-stationary signal model, is capable of capturing the time-varying quasiharmonics in voiced speech. This paper suggests the use of AQHM in a multi-layer scheme which results in a high-resolution time-frequency representation of speech. This representation is then used for the recovery of the evolving spectral envelope and thus, a time-frequency spectral envelope estimation algorithm is introduced related to the Papoulis-Gerchberg algorithm for data extrapolation. Results on voiced speech sounds show that the estimated spectral envelopes are smoother than those estimated by state-of-the-art spectral envelope estimators, while maintaining the important spectral details of the speech spectrum.
Yannis Agiomyrgiannakis, Yannis Stylianou
Added 21 Aug 2011
Updated 21 Aug 2011
Type Journal
Year 2011
Where ICASSP
Authors Yannis Agiomyrgiannakis, Yannis Stylianou
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