[hts-users:01668] Re: Stability problem using LSP

["Heiga ZEN (Byung Ha CHUN)" <heiga.zen@xxxxxxxxxxxxxxxxx>]

Hi,

Geoffrey Wilfart wrote:

> Thank you for your answer. I have already used both, and never got any 
> issue when using mel-cepstrum parameters.
>
> I was willing to use generalized LPC-LSP parameters on mel scale, as 
> they're reported to give the best MOS in:
>
> H. Zen, T. Toda, K. Tokuda, "The Nitech-NAIST HMM-based speech synthesis 
> system for the Blizzard Challenge 2006", IEICE Trans. on Information and 
> Systems, 2006.

In that paper, we used STRAIGHT to extract spectra and then extracted 
39-order LSPs for each frame.  Are you using STRAIGHT?  And if GV is 
used, synthesis filters obtained from generated LSPs sometimes get 
unstable (mcep achieved the best MOS in that experiment when GV was used).

Best regards,

Heiga ZEN (Byung Ha CHUN)

--
Heiga ZEN (Byung Ha CHUN)
Speech Technology Group
Cambridge Research Lab
Toshiba Research Europe
phone: +44 1223 436975

______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please visit http://www.messagelabs.com/email 
______________________________________________________________________