[asterisk-speech-rec] Tags don't seem to work

[Chung Pak Lai]

Hi David,

The grammar should look like this in order to return the tag "yes"/"no":

---------
#ABNF 1.0;
mode voice;
language en-US;
tag-format <lumenvox/1.0>;

root $yesorno;
$yes = (yes $GARBAGE|yep|yeah|sure|correct):"yes";
$no = (no $GARBAGE|nope):"no";
$yesorno = ($yes|$no) {$=$$};
---------

Notice that the parentheses that added around all terminals and that's
for grouping purpose. If you don't have the parentheses then the tag
will only apply to the last terminal in the rule.

Thanks
--Chung

-----Original Message-----
From: asterisk-speech-rec-bounces at lists.digium.com
[mailto:asterisk-speech-rec-bounces at lists.digium.com] On Behalf Of
Daniel Floyd
Sent: Thursday, December 14, 2006 10:50 AM
To: asterisk-speech-rec at lists.digium.com
Subject: [asterisk-speech-rec] Tags don't seem to work

I'm doing some experiments with the LV speech engine and Asterisk 1.2
and am having problems with tags.  Specifically, I'm using the
yesno.gram from the pizza demo and if I read the grammar right,
regardless of whether "yes", "yes please", "yep", "yeah", "sure", or
"correct" is said, "yes" should be returned by the SPEECH_TEXT()
function (or at the very least "correct"
should return "yes" -- it wasn't clear to me from the docs and other
examples if the tag held for the entire rule or just "correct" and since
I can't get tags to work at all, I couldn't test it to find out).  At
any rate, I always get back what was said, not the tag.  So if I say
"correct",
SPEECH_TEXT(0) returns "correct", not "yes".  I thought the point was
that "yes" would be returned.  This happens in both my dialplan and with
the pizza demo.

I've looked through apps/app_speech_utils.c and res/res_speech.c, but
neither are very telling since they are both generic.  So I'm guessing
the interesting stuff is in res_speech_lumenvox.so which of course
source is not available for.  After looking at the Lumenvox API docs,
I'm going to venture a guess (assuming it isn't me) that maybe
res_speech_lumenvox.so is only returning the "terminal" nodes from the
parse tree and not the "tag" nodes.
If that's the case, is there a way or plans to change this?  Seems like
a lot of the functionality is lost without tags.  

Here is yesno.gram I am using.  And once again, this is straight out of
the pizza demo.  I'm also using the lumenvox.conf file from the pizza
demo except with an additional grammar file I added for my own dialplan
I'm working on.

---------
#ABNF 1.0;
mode voice;
language en-US;
tag-format <lumenvox/1.0>;

root $yesorno;
$yes = yes $GARBAGE|yep|yeah|sure|correct:"yes";
$no = no $GARBAGE|nope:"no";
$yesorno = $yes|$no {$=$$};
---------

Thanks,
Daniel
 

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