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Low Accuracy with Ipad

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2011-10-27
2012-09-22
  • shamsudheen

    shamsudheen - 2011-10-27

    Hi all

    i used the English Voxforge Accoustic model from http://sourceforge.net/proje
    cts/cmusphinx/files/Acoustic%20and%20Language%20Models/
    with my
    Openears.

    It working excellent with Simulator. However it not working fine with Ipad
    device. getting more time to display the detected voice also it has only 30%
    Accuracy where simulator had 95-100 % accuracy.

    i am unable to fin out the issue. may i know any valuable suggestions for your
    side

    Thanks

     
  • Nickolay V. Shmyrev

    voxforge-en-0.4 is 16khz model for desktop microphones, it's not compatible
    with iphone audio which is 8khz. You need to use 8khz acoustic model like
    hub4wsj_sc_8k provided with the pocketsphinx.

     
  • shamsudheen

    shamsudheen - 2011-10-27

    So may i know which will be the better Option for me to work with Ipad.

    is US **English Communicator Telephone Acoustic ** will work?

     
  • shamsudheen

    shamsudheen - 2011-10-27

    i have downloaded 8KHZ English Voxforge Accoustic model from
    http://www.voxforge.org/home/news/news/updated-8khz-sphinx-acoustic-
    model

    However i found the same issue..

    Working fine with Simulator but not well with IPad.

     
  • Nickolay V. Shmyrev

    i know which will be the better Option for me to work with Ipad.

    I told you above: hub4wsj_sc_8k provided with pocketsphinx distribution.

     
  • shamsudheen

    shamsudheen - 2011-10-27

    hub4wsj_sc_8k provided with pocketsphinx distribution is not getting better
    accuracy. may i know is any other better acoustic models available?

     
  • Nickolay V. Shmyrev

    No, hub4wsj_sc_8k is the best one.

     
  • shamsudheen

    shamsudheen - 2011-10-27

    Let me clarify one thing,
    Would it be possible to obtain more accuracy than openears default acoustic
    model using the custom trained one with first 20 sentences from CMU ARCTIC
    text-to-speech databases which is described in http://cmusphinx.sourceforge.n
    et/wiki/tutorialadapt

     
  • shamsudheen

    shamsudheen - 2011-10-27

    Thanks for your professional and effective help.

     
  • Joseph S. Wisniewski

    voxforge-en-0.4 is 16khz model for desktop microphones, it's not compatible
    with iphone audio which is 8khz.

    I run at 16k, no problems. An iPhone 4 will quite happily sample at 44.1k. I
    believe a 3 will, too.

    You need to use 8khz acoustic model like hub4wsj_sc_8k provided with the
    pocketsphinx

    Mine is running fine with 16k models.

     
  • Joseph S. Wisniewski

    I run both voxforge-en-0.4 and hub4wsj_sc_8k on iPhone 4 with pocketsphnx 0.61
    live with OpenEars and the 16k models are more accurate. I also run0.61 and
    0.7 pocketsphinx_batch (an interesting experience on an iDevice) and see
    exactly the same results running live, voxforge has about 40% lower WER than
    WSJ.

     
  • Nickolay V. Shmyrev

    Thanks, wiz, it should be so.

    In any case it needs extensive testing beforehand. Trying different models is
    the best way to waste a time.

     
  • shamsudheen

    shamsudheen - 2011-10-29

    @wiz:

    i wish to have a clarification in acoustic model implementation

    I have done the below process:

    1.Downloaded voxforge-en-r0_1_3.tar.gz and extracted.

    2.copied voxforge_en_sphinx.cd_cont_3000 folder and pasted it in my Openears
    Library Folder(/Users/mac01/dev/OpenEars/CMULibraries/pocketsphinx-0.6.1/model
    /hmm/en_US)

    3.Renamed the folder as hub4wsj_sc_8k

    4.Cleaned all targets and Built Openears Project file.

    may i know is there any more steps to do?

    Thanks

     
  • shamsudheen

    shamsudheen - 2011-10-29

    The Openears Details:

    OpenEars Version 0.913
    pocketsphinx-0.6.1
    sphinxbase-0.6.1

     
  • Nickolay V. Shmyrev

    may i know is there any more steps to do?

    no

    Also please verify the links that i downloaded.

    links are correct

     

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