>I'd like to test these HMMs with the test part.

I just use HResults as described on this page: Testing Your Acoustic Model with HTK & Julius

There is some good AM testing info in this post: Acoustic model testing

--- (Edited on 6/7/2011 12:40 pm [GMT-0400] by kmaclean) ---

Ok, thank you, I will read it in depth. Nevertheless, there is a question I cannot solve, and I would like to explain it here.

In a first evaluation, I have created a word loop in a bnf file, with the 5062 words corresponding to the test part of the corpus:

({sil} <$word {sil}>)

And I have obtained these results:

====================== HTK Results Analysis =======================
  Date: Wed Jun  8 11:49:41 2011
  Ref : testref.mlf
  Rec : recout.mlf
------------------------ Overall Results --------------------------
SENT: %Correct=2.07 [H=57, S=2702, N=2759]
WORD: %Corr=47.16, Acc=16.87 [H=12137, D=651, S=12947, I=7796, N=25735]
===================================================================

I think that, of course, a LM could improve these results, but first of all I would like to improve the acoustic probabilities. That is why I have thought about using the word-network-expansion options of HTK.

If I execute the HVite with a monophone dict with:

ALLOWXWRDEXP = FALSE
ALLOWCXTEXP = TRUE
FORCECXTEXP = TRUE
CFWORDBOUNDARY = TRUE

I obtain the same result as when I use a triphone dictionary, because the system only performs context expansion in the word.

If I set ALLOWXWRDEXP = TRUE to allow context expansion across words, I obtain this error:

ERROR [+8230]  NewPronHolder: Every word must define some context [sil=-1/0/-1]

I suppose the system manages the "sil" model like the other phoneme-models and is looking for models like "a-sil+b". I do not know how to indicate that this model should be treated as a context-free one (note that I have set CFWORDBOUNDARY = TRUE).

Anybody knows how I can use these settings?

Thank you,

Igor Odriozola

--- (Edited on 6/8/2011 5:37 am [GMT-0500] by igor_odriozola) ---

--- (Edited on 6/9/2011 9:03 am [GMT-0500] by igor_odriozola) ---

>using the word-network-expansion options of HTK.

This is a question for the HTK users list

--- (Edited on 8/2/2011 10:03 am [GMT-0400] by kmaclean) ---

Hi, Igor Odriozola. I have the same error with you as [sil=-1/0/1] and do not  know how to do, although I have read about Word-Network Expansion.

Have you solved this problem? And may I ask you about the way?

thank you,

sunny

--- (Edited on 2/29/2012 3:52 am [GMT-0600] by Visitor) ---