[Fwd: SRILM]

[Andreas Stolcke]

In message <963905.98762.qm at web25404.mail.ukl.yahoo.com>you wrote:
> Hi, J.
> 
> You can use class-ngram (see manpages) to generate
> classes from text automatically. Two files, class
> count (standard N-gram file with class labels as
> units) and class definition (telling you class
> assignments for words) files are generated. Use those
> to train LMs with ngram-count as usual, you need just
> to add -classes option to refer to the
> class-definition file.
> If you want to use classes of your own, it's a bit
> more tricky, since you have to take care of correct
> class-definition file forming.

I would add that one you have your class definitions (by hand, or as 
the result of ngram-class), the recommended procedure is to 
filter your training data through 

	replace-words-with-classes classes=CLASS-DEFINITIONS-FILE 

and the train the ngram model on the output (see training-scripts(1) manpage).

In testing you use that model together with the ngram -classes option 
as Ilya said.

Andreas 

> 
> regards,
> Ilya
> 
> --- Andreas Stolcke <stolcke at speech.sri.com> wrote:
> 
> > 
> > Anyone can give J. some pointers on how to build
> > class-based LMs?
> > 
> > Andreas
> > 
> > > Date: Sat, 16 Jun 2007 16:20:18 +0530 (IST)
> > Subject: SRILM
> > From: "J.Sashank" <sashank at cse.iitb.ac.in>
> > To: stolcke at speech.sri.com
> > 
> > Sir,
> >     I am undergraduate student studying in IIT
> > Bombay . I am working on a
> > research project which involves trigram model.I want
> > to use
> > class-based trigram model but I cannot find its the
> > usage in the SRILM
> > package . Can you please tell me about the usage of
> > the package for
> > this model.
> > 
> > Thanking You,
> > 
> > J.Sashank
> > Junior Undergraduate
> > Computer Science and Engineering
> > IIT Bombay
> > 
> > 
> 
> 
> 
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