[SRILM User List] Cache model, ngram server

Nickolay V. Shmyrev nshmyrev at yandex.ru
Mon Jun 20 12:15:10 PDT 2011

В Пнд, 20/06/2011 в 20:29 +0200, Simon Andersson пишет:
> Nickolay Shmyrev reports that he included the feature in Sphinx 4:
> http://nsh.nexiwave.com/2009/11/using-srilm-server-in-sphinx4.html
> (He also confirmed to me that it is not in PocketSphinx.)
> I'll use Nickolay's code as a reference when making a PocketSphinx version.

Hello Simon

If your goal is only to implement cache-based LM, using SRILM as a
server doesn't seem like an easy way and there are many important points
you need to care about:

1. During initialization stage decoder requests *all* unigram
probabilities to build lextree. You definitely don't want them to be in
a cache and you need to disable cache for initialization.

2. During the search the decoder stores unigram probabilities internally
in lextree. Most of the words are pruned before they reach leafs, so
cache on server will not help you since probabilities will be the same.
You need to adjust the weights inside the lextree.

3. You need to reset cache somehow

Well, I suggest you to discuss this implementation thing on
cmusphinx-devel mailing list instead since this is not really a SRILM

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