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Trying to find the log-likelihood of an utt

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Anonymous
2011-12-19
2012-09-22
  • Anonymous

    Anonymous - 2011-12-19

    Hello all, i very new at pocketsphinx, and i would need to find the function
    that returns the log-likelood of each utterance becouse i need that value to
    continue (i am working on speaker verification). If anyone can lead me to the
    function or even a brief description of the way Pocketsphinx applies viterbi
    algorithm i would really appreciate it. Thanks a lot!

     
  • Nickolay V. Shmyrev

    need to find the function that returns the log-likelood of each utterance

    There is no such function. You can construct score from ps_alignment results
    if you need it.

    If anyone can lead me to the function or even a brief description of the way
    Pocketsphinx applies viterbi algorithm i would really appreciate it.

    http://www.lti.cs.cmu.edu/Research/Thesis/huggins-
    daines,%20david.pdf

     
  • Anonymous

    Anonymous - 2011-12-20

    Oh, thanks a lot. I am more used to dealing with HTK so i thought there would
    also be in sphinx a function that directly outputs the score. Thanks!!

     
  • Anonymous

    Anonymous - 2011-12-20

    Sorry, i have been looking for ps_alignment in the doxygen and i couldn't find
    it. Also would you know what steps should i take to obtain the likelihoods of
    each phoneme in an utterance, and also the likelihood of the entire utterance?
    becouse i can't see it clearly. Thanks a lot

     
  • Nickolay V. Shmyrev

    Sorry, i have been looking for ps_alignment in the doxygen and i couldn't
    find it. Also would you know what steps should i take to obtain the
    likelihoods of each phoneme in an utterance, and also the likelihood of the
    entire utterance? becouse i can't see it clearly.

    See the file

    pocketsphinx/test/unit/test_alignment.c
    
     

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