Step 7 - Fixing the Silence Models
Background
In the last step you created HMM models that did not
include an "sp" (short pause) silence model - which refers to the types
of short pauses that occur between words in normal speech.
However, you did create a "sil" silence model - sil silence models are
typically of longer duration, and refer to the pauses occur at the end
of a sentence.
The
HTK book says that the sp model needs to have its
"emitting state tied to the centre state of the silence model".
What this means is that you need to create a new sp model in your
hmmdefs, that it will use the centre state of sil, and then they both
need to be 'tied' together. For a bit of background on HMMs and
states, see this example .
This can be done by copying the centre state from the sil model in
your hmmdefs file and adding it to the
sp model, and then running a special tool called HHED to 'tie' the sp
model
to the sil model so that they share the same centre state. The
HTK book provides some background on what this means, but you need an
understanding of the basics of Hidden Markov Modelling before tackling the HTK Book explanations (the University of Leeds HMM tutorial provides a very good tutorial on Hidden Markov Modelling).
Note: you do not need to understand HMMs to complete this tutorial.
Tutorial
First copy the contents of the hmm3 folder to hmm4. Then using an editor, create new "sp" hmm4/hmmdefs
copy and paste the “sil” model and rename the new one “sp”(don't delete your old "sil" model, you will need it - just make a copy of it)
remove state 2 and 4 from new “sp”
model (i.e. keep 'centre state' of old “sil” model in new “sp”
model)
change <NUMSTATES> to 3
change <STATE> to 2
change <TRANSP> to 3
change matrix in <TRANSP> to 3 by 3 array
change numbers in matrix as follows:
0.0 1.0 0.0
Your sp model should look something like this:
~h "sp"
Your files should look like this:
Next, run the HMM editor called HHEd to "tie" the sp state to
the sil
centre state - tying means that one or more HMMs share the same set of
parameters. To do this you need to create the following HHEd
command script, called sil.hed , in your voxforge/manual folder:
AT 2 4 0.2 {sil.transP}
The last line is the "tie" command. Next run HHEd as follows, but using the monophones1 file which contains the sp model:
$HHEd -A -D -T 1 -H hmm4/macros -H hmm4/hmmdefs -M hmm5 sil.hed monophones1
The files created by this command are:
Next run HERest 2 more times, this time using the monophones1 file:
$HERest -A -D -T 1 -C config -I phones1.mlf -t
250.0 150.0 3000.0 -S train.scp -H hmm5/macros -H hmm5/hmmdefs -M
hmm6 monophones1
The files created by this command are:
$HERest -A -D -T 1 -C config -I phones1.mlf -t
250.0 150.0 3000.0 -S train.scp -H hmm6/macros -H hmm6/hmmdefs -M hmm7
monophones1
The files created by this command are:
Comments
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problem eith step 7....any help?
By Visitor
-
3/15/2010
can anyone solve my problem at step 7????
C:\htk\bin.win32>HHEd -A -D -T 1 -H hmm4/macros.txt -H hmm4/hmmdefs.txt -M hmm5\
No HTK Configuration Parameters Set
ERROR [+2619] HHEd: HMM list file name expected
i do not how i can create this file .hed just i created sil.txt
is it ok to complete my task???another problem is that with sil.txt also there are errors which i coudn't solve?
Reason for not supporting successive Tee models in HERest
By Tom
-
3/12/2010
Do any one know what is the reason for HERest not permitting successive Tee models ? Any pratical or conceptual reason behind that?
phones1.mlf ???
By puphe_88
-
1/1/2010
- 1 Replies
what the contains file of phones1.mlf when compile hmm6 , hmm7 ??
help on my error 7321
By abinew A
-
11/22/2009
- 1 Replies
administrator@home-1c4b4e8ca9 /home/voxforge/manual
HERest -A -D -T 1 -C config -I phones1.mlf -t 250.0 150.0 3000.0 -S train.scp -H hmm5/macros -H hmm5/hmmdefs -M hmm6 monophones1
i also tried
HERest -A -D -T 1 -C config -I phones0.mlf -t 250.0 150.0 3000.0 -S train.scp -H hmm5/macros -H hmm5/hmmdefs -M hmm6 monophones1
but still i face a problem.
is there any one who can help me?
thank you!
the output of my system is as follows:
adminstrator@home-1c4b4e8ca9 /home/voxforge/manual
HTK Configuration Parameters[10]
HERest ML Updating: Transitions Means Variances
System is SHARED
abinew@home-1c4b4e8ca9 /home/voxforge/manual
error in HERest
By joshuajnoble
-
6/6/2009
- 2 Replies
I get the following error when I run the HERest command:
HTK Configuration Parameters[10]
Everything has gone swimmingly up until this point, so I'm not sure what's gone off here.
Mistake in tutorial
By zvaracik
-
5/20/2009
- 1 Replies
I try this manual for create grammar recognition engine. But tutorial in this page I found a mistake.
When I create in folder hmm4 file hmmdefs, and in this new sp model, so there are different transp matrice in tutorial a in hmm4/hmmdefs in exaple.
Its very important how matrice I set? Which is that correct?
Thank
Re: Error [+6510] LOpen: Unable to open label file downsampled.lab
By kmaclean
-
3/15/2009
- 3 Replies
from this post by kalmanbucy :
Re: Error [+6510] LOpen: Unable to open label file downsampled.lab
In
the "A Tutorial Example" of HTKbook, we need to put .lab files with
those .mfc in the feature folder as we create flat start monophones.
Then we execute "HERest" three times to train the model. After that we
add a model for "sp" in the step 7 to fix silence model, and use "HLEd"
to generate a new trascription file for all phones plus "sp", called
phones1, right. Then we need to train the models twice more. However,
an issue comes up. The .lab files under .data/train/feature remains
old, i.e. no "sp" was added to these .lab files while silence model was
fixed.If we follow the htk tutorial to execute this below:
HERest -C config/config1 -I labels/phones1.mlf -t 250.0 150.0 1000.0
-S train.scp -H hmms/hmm5/macros -H hmms/hmm5/hmmdefs -M hmms/hmm6
lists/monophones1
A warning will pop up:
Pruning-On[250.0 150.0 1000.0]
It means model can't be updated due to little training data, because
.lab will be searched in the process of training. Have you ever meet
this trouble before?
HHEd
By MrNice
-
3/9/2009
- 4 Replies
Hi,
I've got a problem with the HHEd command! I executed the HHEd command like described on this page, but I always get this Error massage:
$HHEd -A -D -T 1 -H hmm4/macros -H hmm4/hmmdefs -M hmm5 sil.hed monophones1
Can anyone help me?
Errore creating file for hmm6
By Manuel
-
9/6/2007
- 3 Replies
When I execute:
HERest -A -D -T 1 -C config -I phones1.mlf -t 250.0 150.0 3000.0 -S train.scp -H hmm5/macros -H hmm5/hmmdefs -M hmm6 monophones1
It give me this error
ERROR [+7332] CreateInsts: Cannot have successive Tee models
I check all the previous file in hmm5, and they are like the example of the tutorial.
Someone can help me?
Tks
