Moses Support Digest:Building POS language model with SRILM

[Moses-support] Building POS language model with SRILM
Hi,
The Moses manual recommends using the following switches when building a language model with SRILM:
　　-interpolate -kndiscount
I assume this recommendation applies specifically to surface-string language models. For a part-of-speech language model, KN-discounting is inappropriate because it is based on counts-of-counts, and the counts-of-counts for POSes are odd in that there are very few POSes that occur only once or twice in a given corpus.
Are there particular switches that are recommended for building a POS
language model with SRILM?
Regards,
Ben Gottesman


Re: [Moses-support] Building POS language model with SRILM

Hi,
you are correct that for POS LMs the lower order n-gram counts are very different and smoothing is less relevant.
You could train a 7-gram LM with Good Turing smoothing for the lower order n-grams and Kneser-Ney for the higher order n-grams.
I have done this occasionally.

-phi

NOTICE:This is digested from the Moses-support mailing list, which supports for the moses SMT decoder.

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