Speech Spectrum Modeling for Joint Estimation of Spectral Envelope and Fundamental Frequency
Hirokazu Kameoka, Nobutaka Ono, Shigeki Sagayama · IEEE Transactions on Audio Speech and Language Processing · 2009
Although considerable effort has been devoted to both fundamental frequency (F0) and spectral envelope estimation in the field of speech processing, the problem of determiningF0and spectral envelopes has largely been tackled independently. IfF0were known in advance, then the spectral envelope could be estimated very reliably. On the other hand, if the spectral envelope were known in advance, then we could obtain a reliableF0estimate.F0and the spectral envelope, each of which is a prerequisite of the other, should thus be estimated jointly rather than independently in succession. On this basis, we develop a parametric speech spectrum model that allows us to estimate theF0and spectral envelope simultaneously. We confirmed experimentally the significant advantage of this joint estimation approach for bothF0estimation and spectral envelope estimation.