[hts-users:01142] Re: HTS2.1beta-HVite

[Sacha Krstulovic <sacha@xxxxxxxxxxxxxxxxx>]

Hi;

As a follow-up to this thread:

If one wanted to align some unseen acoustic observations
with some HSMM states, would the conversion suggested
by Simon with the use of HVite be the best way to achieve this,
or would one have to hack HERest to export the affiliation
between the states and the cumulated frames with best occupancy,
or would there just be another better solution?

Thanks;
                          -*- Sacha K. -*-

Simon King wrote:
> Heiga ZEN (Byung Ha CHUN) wrote:
> > You can use HVite of HTS-2.1beta with *HMMs*. 
>
> and it is straightforward to convert your HSMMs to HMMs. Here is my recipe:
>
> - in your HSMM, there is a dummy transition matrix which is probably 
> shared by all models (this is what the HTS demo scripts do), so untie 
> it, then retie so it is shared between models for the same centre phone 
> (for example). Then, modify the transition matrices so they are the 
> usual band-diagonal form (self transition and forward transition for all 
> emitting states). Here is my .hed file for doing that using HHEd (models 
> with 5 emitting states):
>
> TR 2
> UT {*.transP}
> TI T_aa {(*-aa+*).transP}
> TI T_ae {(*-ae+*).transP}
> TI T_ah {(*-ah+*).transP}
> [... etc for all phones]
> AT 2 2 0.9 {*.transP}
> AT 2 3 0.1 {*.transP}
> AT 3 3 0.9 {*.transP}
> AT 3 4 0.1 {*.transP}
> AT 4 4 0.9 {*.transP}
> AT 4 5 0.1 {*.transP}
> AT 5 5 0.9 {*.transP}
> AT 5 6 0.1 {*.transP}
> AT 6 6 0.9 {*.transP}
> AT 6 7 0.1 {*.transP}
>
>
>
> - next, train the transition matrices - do one or two rounds of EM. You 
> could tell HERest to only update the transition matrices (-u t) and 
> leave the Gaussians unchanged, if you want your HMMs to be as similar as 
> possible to your HSMMs
>
>
> Simon
>
>
>
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--
Dr.Sacha Krstulovic - Research Engineer
Toshiba Research Europe Limited
Cambridge Research Laboratory
Speech Technology Group
208 Science Park, Milton Road
Cambridge CB4 0GZ - United Kingdom
E-mail: sacha@xxxxxxxxxxxxxxxxx



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