[Asterisk-Users] Speech Recognition

[Race Vanderdecken]

I worked with Intellivoice. They did VAD, voice activated dialing, on
the switch. You had to dial a number, speed dial on the cel, to get the
reco. It worked with any phone. Their research should that speech
recognition was more accurate then DTMF dialing.

They were doing voice pattern recognition, that is were you record a
couple of names that are kept on the switch/pbx, then a person says the
name and the switch thing tries to match the phrase. They could only get
about 7 names and they had to be very different phrases.

The number recognition, saying 0-9 was done differently, but it was 97%
accurate vs. about 80-90ish % for hand dialing.

The hard part is that Cell at that time was CDMA so there was a bunch of
background noise to do the reco on.

The Nynex phone guys used it a bunch. And they did it in South America.

In the end the VAD turned out to be easier to do with software in the
phone doing the reco because of the lousy quality of the audio the
switch was trying to do on.

So, what have we learned?

Being able to say the number is better then using your, in my case
"fat", fingers to dial a phone.

But you need a good Signal to Noise ratio to recognize them.

Also you need to able to recognize natural language numbers. Numbers
like "1,2,3,4,..." are easy. But most people will say "ninety-nine",
"double oh", Transylvania six five thousand"

Remember, you can't force train a user. Do reco on 0-9 and be prepared
for people saying it does not work.

Let me know how you make out with this.

Race "the tyrant" Vanderdecken (soon to have a new and improved
website.)

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Robert
Rozman
Sent: Saturday, July 09, 2005 7:39 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Speech Recognition


----- Original Message ----- 
From: "Richard Koch" <n1gp at hotmail.com>
To: <asterisk-users at lists.digium.com>
Sent: Friday, July 08, 2005 4:38 PM
Subject: [Asterisk-Users] Speech Recognition


> Ed,
> 
> Check this out:
> 
> http://turnkey-solution.com/asterisk-sphinx.html
> 
> That got me up in running in no time.
> 
> -Rick
> 
What are you experiences with recognition accuracy and user acceptance ?

Any more info you're willing to share will help out others....

Regards,

Rob.



>>-----Original Message-----
>>From: Ed Greenberg [mailto:edg at greenberg.org]
>>Sent: Friday, 8 July 2005 9:32 AM
>>To: Dean Collins; Asterisk Users Mailing List - Non-Commercial
> Discussion
>>Subject: RE: [Asterisk-Users] Speech Recognition
>>
>>Tell me probably is excessive. I just really need to recognize
>>Yes, No, One, Two, Three and Four.
>>
>>The Sphinx suggestion should help though.
>>
>></edg>
>>
> 
> 
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