Re: Prompt interface question

[vincent ribiere <ribiere@cisco.com>]

Jeff,

Thanks. Yes, that's what I was planning to do in the short term.
However, I have an issue with that: the VXI engine always expect a grammar
from the recognition interface. For instance, in process_rec_result(), the code looks at the
grammar type to decide what action it should take.
I guess we could fake the API and build an empty grammar object with just the
grammar type being set and no real grammar? Does the VXI really need a grammar from the
recognition interface ?
 

Also when a real grammar is available, I was wondering how the grammar would look like
(with JSGF for instance) for built-in types like "digits?length=10".

Vincent
 
 

Vincent,

I've been looking for the same open-source implementatuin of JSGF.. But if
you just want to make those built-in types of grammars work within the
<field> element, you may check the built-in type name (without using a
general grammar mechanism) inside QArecRecognize or your own implementation
of the VXIrecRecognize API:

      for(i=0;i<tp->ngrams;i++)
        {
        rec_gram_t* gr = (rec_gram_t*)tp->grams[i];
        if (gr->enabled == 1)
                printf("enabled, grammar=%s\n",
VXIStringValue(VXIObjectGetProperty(gr->fetchobj,URL_REL_URL)));
          ...
      }

After you get the type name "builtin:digits?length=10", you can do
appropriate things. Later on, when you have a general impl of a grammar, you
can replace the special-handling code with it.

Does this make sense to you? I'm trying the same thing here...

Jeff

-----Original Message-----
From: vincent ribiere [mailto:ribiere@cisco.com]
Sent: Tuesday, March 06, 2001 3:11 PM
To: rick@tgflinux.com
Cc: speechworks
Subject: Re: Prompt interface question

Rick,

Thanks for your answers: I hope this mailing list is going to have more and
more
traffic.

I'm currently working on the telephony interface using the SIP stack and
User Agent
from Vovida (www.vovida.org), the goal being to have a fully open-source
solution.
I was planning to use Festival and Sphinx later on and I'm therefore really
interested
in your work in that area - do you plan to open-source some of the APIs and
when ?

Also I did not get any feedback to my DTMF question yet so if you have any
input
it's not too late ;-). As there is no archive yet, I just append my
question again
- sorry about that.

Thanks,

Vincent

"I'm trying to use the recognition interface to receive DTMF digits
sequences.

It works fine when I need to recognize single digits as the grammar is
relatively simple:
for instance if I'm only expected 1,2 or 3 in a field, the following works
fine:

<field name="main_choice">
      <dtmf> 1| 2 | 3 </dtmf>
</field>

But if I need to obtain a certain number of digits from the user (e.g. a
phone number
with 10 digits), I run into problems as the following is not supported:

<field name ="extension"  type="digits?length=10" >
    <prompt> Enter the 10 digits extension of the user you want to reach
    </prompt>
 </field>

It seems I need a more elaborate support for grammars but does anyone know
a way of writing a grammar that supports the above (with the existing
recognition
code) ?

As it seems unlikely, does anyone know of an open-source implementation of
a
grammar (e.g. JSGF) that would allow to do this ?  "

-- 
Vincent Ribiere
senior Engineer, Cisco Systems
(408) 527 6613