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<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>This is a pretty common problem, and one without a great solution.
The fact is that "Eight" and "A" sound very similar in
English -- even humans have great difficulty distinguishing them over the
phone. If it's hard for humans, it's harder for a machine.<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";
color:black'>The best way to deal with it, if possible, is to ask people to say
things like "Alpha" or "Alex" for "A" and add
those to your grammar, which I think you've started doing with "Y."<o:p></o:p></span></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
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<p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span
style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>
asterisk-speech-rec-bounces@lists.digium.com
[mailto:asterisk-speech-rec-bounces@lists.digium.com] <b>On Behalf Of </b>David
Merel<br>
<b>Sent:</b> Friday, October 10, 2008 3:31 PM<br>
<b>To:</b> asterisk-speech-rec@lists.digium.com<br>
<b>Subject:</b> [asterisk-speech-rec] How does one tell the difference
betweennumbers and letters - Lumenvox<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
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<p class=MsoNormal>So I have a Grammar file where I am trying to combine
letters and numbers so that people can speak a model number of a MAC address of
a network device into the phone.<br>
<br>
Problem is 8 and A are commonly being mixed up, even with the speech tuner it
doesnt seem to be too accurate, is there any way in the grammar file to further
enhance a Letters recognition?<br>
<br>
Here is a small example, btw for example you will see below I added
"Ay" not sure if that even valid, but with or without I am getting
the same accuracy issues.<br>
<br>
$Digit = (ONE:"1" |<br>
TWO:"2" |<br>
THREE:"3" |<br>
FOUR:"4" |<br>
FIVE:"5" |<br>
SIX:"6" |<br>
SEVEN:"7" |<br>
EIGHT:"8" |<br>
NINE:"9" |<br>
(ZERO | O):"0"
);<br>
<br>
$A = (A|Ay):"A";<br>
$B = (B|bee):"B";<br>
$C = (C|see):"C";<br>
$D = (D|dee):"D";<br>
<br>
$Y = (Yankee $GARBAGE| <br>
Young|Why):"Y";<br>
<br>
$Digits = {$=''} (($Digit|$A|$B|$C|$D|$Y){$+=$$})<1->;<br>
<br>
Any help would be great<br>
<br>
Fyi, I am working with Lumenvox Speech Engine<o:p></o:p></p>
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