In message <1077638057.403b73a921e70 at ADDRESS HIDDEN>you wrote:
> Hi,
>
> We are using the sri lm 1.4 toolkit. As for now we have created a lattice in
> the htk format and a 2gram model in the Arpa format. It is not clear from the
>
> manual page how to decode this lattice uing the 2-gram model. Can you give us
>
> the correct options for the lattice-tool to accomplish this if this is the
> correct tool to use?
>
> thank you,
> Gregor
Gregor,
You would run lattice-tool twice, first to rescore the lattices with your
LM, then to extract the best hypothesis.
For LM rescoring use options
lattice-tool -read-htk -write-htk -order 2 -lm LM -no-nulls
For 1-best decoding use
lattice-tool -read-htk -htk-lmscale LMWEIGHT -viterbi-decode
You could also perform posterior-based (confusion network) decoding using
lattice-tool -read-htk -htk-lmscale LMWEIGHT -posterior-decode
where LMWEIGHT is the weight given to the LM scores relative to the
acoustic model scores.
Of course you need to add options specifying the location of input/output
lattices.
A future version of lattice-tool will probably allow you to combine these
two steps into a single run, but for now you have to do it this way.
--Andreas
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