Re: [Kaldi-users] About last phone output symbol in FST

[Josef N. <jos...@gm...>]

Hi,

 (duplicate since I did not reply to the list the first time)

 This tool was not designed for and is almost certainly not compatible
Kaldi.  Kaldi employs some additional symbol management for the
backoffs, which are not supported in my toolchain (I made it before
Kaldi existed as a public project).  You will have similar problems if
you try to use the OpenGRM ngram tools without modification (but the
google tool does the best hole-plugging).

  In general, default optimization commands (det, min, etc.) do not
guarantee anything regarding symbol synchronization.
  I believe Kaldi does some extra work in this regard.

  Using positional phonemes can make it easier to retrieve the
boundaries (I think there are some tools in Kaldi to do this after the
fact).

  Probably it is not appropriate for this list since it is not
compatible with Kaldi.


 -Joe

On Tue, Jan 7, 2014 at 10:22 AM, E <oth...@ao...> wrote:
> Hello,
>
> This is probably off-topic but I hope someone here knows answer. I am
> converting ARPA LM to FST using "transducersaurus".
> The command that I use is C*min(det(L*(G)))
>
> My problem is, the *.fst.txt file that is created has output symbols at
> unexpected locations.
>
> I expect the output symbols to be <eps> at all phonemes in the word except
> last phoneme and output symbol = "word" for only the last phoneme.
>
> But what I'm seeing is that sometimes output symbol = "word" even for
> phonemes that are not last phonemes in the word.
>
> I wonder what the issue is and how to properly identify word end boundary in
> an FST.
>
> Let me know if sharing my files will help in diagnosis.
>
> Thanks,
> Ethan
>
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