[Freeswitch-users] FreeSWITCH, MRCP and Perl

Tue Jan 13 10:59:40 PST 2009

We already have been collaborating with the maintainer of pocketsphinx for
more than a year now, that's why we have a mod_pocketsphinx.  His latest
releases are based on our feedback so we are already doing that.

On Tue, Jan 13, 2009 at 12:31 PM, <mszlazak at aol.com> wrote:

> Hi Paul,
>
> If you mean fixing up pocketsphinx (ps) for telephony instead of or in
> addition to working on unimrcp then this is the site of the person who
> created ps and he may have some advice.
>
> http://www.cs.cmu.edu/~dhuggins/ <http://www.cs.cmu.edu/%7Edhuggins/>
>
> Also, this was a post from the sphinx forums for adapting pocketsphinx for
> telephony.
>
> http://sourceforge.net/forum/message.php?msg_id=5621913
>
> I don't know how accurate it is but if accurate then here is that post to
> give you some of the issues involved:
>
> -----------------
> Well, there are issues in both the decoder and the interface with the
> telephony application.
>
> First about the decoder, pocketsphinx right now is the most supported
> and most feature-reach decoder of the family, but in general it's still
> oriented on the embedded devices. For telephony applications you
> probably need to extend it a lot. The features that are currently
> missing are probably:
>
> * Out-of-box support for multiple recognizers (probably more a freeswitch
> issue and a model training issue, for example we have no free
> male/female model).
>
> * Speaker clustering.
>
> * Automatic VTLN estimation from pitch (This looks simple).
>
> * Good endpointer.
>
> * Discriminative training support in SphinxTrain (Huge task).
>
> * Good and clean support for a garbage model to be able to filter out
> out of grammar words.
>
> * Embedded RASTA extraction and RASTA model training.
>
> * Advanced features extraction
>
> Another issue is dialog tracking and understanding. CMU folks are doing
> work on dialog systems, for example Raven is available
>
> http://www.ravenclaw-olympus.org/systems_overview.html
>
> It would be worth to look on it and try to integrate it into
> freepbx. Decoder will need to support combined language model. As well
> as you'll need a component for postprocessing. The postprocessing includes
> disfluency removal, text normalization, text boundary detection.
> Integration
> with nltk probably useful for sense extraction.
>
> If you need more details on any of the above, feel free to ask.
> -------------------
>
>
>
>
>
>  -----Original Message-----
> From: Paul Herring <paulh at instruments.com>
> To: freeswitch-users at lists.freeswitch.org
> Sent: Tue, 13 Jan 2009 8:18 am
> Subject: [Freeswitch-users] FreeSWITCH, MRCP and Perl
>
>  What would it take to put a budget together to for this project?
>
>
>
> Date: Tue, 13 Jan 2009 01:55:36 -0500
>
> From: mszlazak at aol.com
>
> Subject: Re: [Freeswitch-users] FreeSWITCH, MRCP and Perl
>
> To: freeswitch-users at lists.freeswitch.org
>
> Message-ID: <8CB436312A08329-80C-1B5D at MBLK-M24.sysops.aol.com>
>
> Content-Type: text/plain; charset="us-ascii"
>
>
>
>  "My god" I would LOVE it if this is really the case and would praise
>
> pocketsphinx (PS) and FS to no end. But my experience has been different.
>
>
> First, I tried the pizza demo with a soft phone and later by outside phone
>
> calls to my Linksys 3102 pstn-to-voip gateway.
>
> Second, I tried these two set-ups again but with Voxeo's Prophecy ASR.
>
>
> Both are as is and by this I mean there was no training of PocketSphinx just
>
> running the pizza demo and with Prophecy there is no training because it
>
> can't be trained.
>
>
> Prophecy is quite good but the FS/Pocketsphinx pizza demo isn't and I
>
> couldn't use it at a pizza join. Also, I get a much better experience when
>
> calling LumenVox and trying their pizza demo.
>
>
> Now, maybe Prophecy is the type of asr that doesn't require hours of
>
> training to make it speaker independent. I know that the Sphinx family are
>
> the types of ASR that do need this.
>
>
> So, if there is some settings for adaptation of Pocketsphinx for speaker
>
> independence then are they turned on?
>
> ?
>
> How many hours of calls to a business should an owner expect before
>
> PocketSphinx gets good enough not to scare customers away?
>
>
> If there are many hours needed then I could see using another ASR in the
>
> mean time, recording their calls and feeding the audio to Pocketsphinx for
>
> training, then switching to Pocketspinx once it's "tuned up." At least this
>
> way a business doesn't have to deal with a "virgin" pocketsphinx.
>
>
>
>
>  Mark
>
>
>
>
>
>
>
> --
>
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-- 
Anthony Minessale II

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