Hello everybody!!

I am trying to implemente CMLLR adaptation. When I run HERest, I got an errore due to the absence of a particualr triphone in my HMM. I am using a configuration file in which I set:

ALLOWXWRDEXP=F
FORCECXTEXP=T

should not this start looking for monophone in case there is not the relative triphone instead of reporting an error?

HVite does it.. does it not work in the same way for HERest?

If not, does this mean that I should have a model for any triphone present in the adaptation data?

I will be very very grateful for any kind of help you can give me.. I am really getting crazy! :

Thank you very much in advance!!

--- (Edited on 3/8/2013 6:55 am [GMT-0600] by Visitor) ---

In order to let others understand your problem please provide the exact error message from HERest

Remember, the more information you provide the faster you get the answer.

--- (Edited on 3/8/2013 16:45 [GMT+0300] by nsh) ---

Thank you for your answer:)

This is the error I am getting:

ERROR [+7321]  CreateInsts: Unknown label i-n+o
 FATAL ERROR - Terminating program /home/giampila/Desktop/htk-3.4.1/HTKTools/HERest

I am using different data sets for training and adaptating and, apparentely, some of the triphones in the adaptation sets are not in the training set.

If I run HERest using phones instead of triphones, it run, but the perfomarnce are really low.

--- (Edited on 3/8/2013 12:52 pm [GMT-0600] by Visitor) ---

It's probably better to create a full tied list with the dictionary with HHEd AU command. That way you will be able to find models for all possible variants from your dictionary and it will be better than monophone fallback.

> FORCECXTEXP=T

> should not this start looking for monophone in case there is not the relative triphone instead of reporting an error?

To fallback to monophones you should use the FORCECXTEXP=F

See in the sources

iv)  Linking of models to network nodes.
Model names are determined from the phone name and the surrounding context names. 
a)  Construct CD name and see if model exists.
b)  Construct CI name and see if model exists.
If ALLOWCXTEXP==FALSE (a) is skipped and if FORCECXTEXP==TRUE (b) is skipped. 
When no matching model is found and error is generated.
 

--- (Edited on 3/8/2013 22:54 [GMT+0300] by nsh) ---

You mean that I should train the model using fulllist as a reference instead of the tied one?

--- (Edited on 3/11/2013 7:11 am [GMT-0500] by Visitor) ---

Sorry for misunderstanding, I never said that.

I said you need to create a new tied list with all possible triphones from the words from the dictionary, not the one you are using. Please read documentation about AU command.

--- (Edited on 3/11/2013 21:41 [GMT+0300] by nsh) ---

Yes, I tried. But still I get the same error and I can not understand why.

The AU command should synthesis new models from the decision trees for the unseen labels.

So.. why do I still get the same error? If HHEd does not find the model, the AU command should compensate, right? Why does this not happen?

Thank you very much and sorry about the previous comment: I should have read better the documentation about the AU command.

--- (Edited on 3/11/2013 1:58 pm [GMT-0500] by Visitor) ---

> So.. why do I still get the same error? If HHEd does not find the model, the AU command should compensate, right? Why does this not happen?

--- (Edited on 3/11/2013 23:58 [GMT+0300] by nsh) ---