[SRILM User List] lattice-tool for FLM

[Andreas Stolcke]

Alex,

I haven't looked at your example in detail, but two hints:

1) debug your LM evaluation using ngram -factored first (before moving 
on to lattice rescoring)
2) follow the steps in $SRILM/flm/test/tests/ngram-factored and make 
sure sure you are (a) inputting and producing files in similar format 
and (b) supplying the right options.

Once you have that working, move on to lattice-tool.   The word strings 
in your lattices should be the same as the input to ngram -factored -ppl ...

Andreas

On 1/26/2014 10:01 PM, alex tudor wrote:
> Hi,
>
> I wish to use FLM in speech recognition. So I've done a factored 
> language model for a small text:
> /fngram-count -factor-file flm_config_kn.txt -text textLM.txt 
> -write-counts textFLM_kn.count -lm textFLM_kn.lm/
>
> flm_config_kn.txt:
> /W : 2 W(-1) P(-1) textFLM_kn.count textFLM_kn.lm 3/
> /W1,P1  W1 kndiscount gtmin 1 interpolate/
> /P1     P1 kndiscount gtmin 1 /
> /0      0  kndiscount gtmin 1 /
>
> Finally textFLM_kn.lm is:
> /\data\/
> /ngram 0x0=510/
> /ngram 0x1=0/
> /ngram 0x2=1378/
> /ngram 0x3=1978/
> /
> /
> /\0x0-grams:/
> /-1.746398</s>/
> /-99<s>/
> /-2.252263W-A/
> /-3.047544W-ABUNDENTE/
> /..../
>
> Afterwards I've tried to rescore a HTK word lattice for a bigram using 
> the 'lattice-tool' and a HTK word lattice (bigram.lat):
> /lattice-tool -read-htk -write-htk -in-lattice bigram.lat -htk-lmscale 
> 10 -posterior-scale 10 -factored -lm textFLM_kn.lm -out-lattice 
> bigramFLM_kn.lat/
>
> But I have an error in textFLM_kn.lm: line 2: error: couldn't form int 
> for number of factored LMs in when reading FLM spec file
>
> What's wrong ? I would be appreciated for any advice.
>
> Sincerely yours,
> Alex
>
>
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