[asterisk-users] How to recognize a name spelled letter by letter ?

[Olivier]

2016-03-23 14:38 GMT+01:00 A J Stiles <asterisk_list at earthshod.co.uk>:

> On Wednesday 23 Mar 2016, Olivier wrote:
> > Hello,
> >
> > I'm wonddering if it is possible, with Asterisk and any third party
> module
> > or service, to build the following feature:
> >
> > - caller dials a given extension dedicated to a given language (german,
> > english, ...)
> > - Asterisk plays a welcome audio prompt
> > - caller spells his or her first name letter by letter (for example,
> caller
> > spell "A", "L", "I", ...)
> > - Asterisk repeats spelled letters to caller.
> >
> > If possible, which module is needed ?
> >
> > Best regards
>
> Well, I'd do the whole thing in Dialplan  (it's fairly computationally-
> complete per Church and Turing),  but I'm a masochist like that :p
>
> What you need to do is have an inner loop; in which you use WaitExten()
> with a
> short timeout to read a digit.  If a digit is pressed within the timeout,
> you
> will get directed to another extension.  There you need to compare the
> digit
> just pressed against the last digit pressed; and if it is the same, then
> you
> select the next letter on that key.  Otherwise you announce the last letter
> selected, append it to the name so far, and select the first letter on that
> key.  If you timeout, then you announce the currently selected letter,
> append
> it to the name so far and set no letter selected.  (This is needed, because
> you may have two letters in succession on the same key; so you must allow
> it
> to timeout before you can enter the next letter.)  If you timeout with no
> letter selected, you increase a counter; and if this gets to some critical
> number, you repeat the prompt:  Background() the original announcement to
> spell their name, and announce the letters entered so far.  If the 1 key is
> pressed once, backspace  (and after the timeout, announce the remaining
> letters);  two presses within timeout clears the name entered so far and
> starts again from scratch.
>
>
> So, for example, someone might enter:
> 2 [set current letter to "A"]
> (user waits for timeout) [Store and say "A". Set current letter to ""]
> 5 [Set current letter to "J"]
> 5 [set current letter to "K"]
> 5 [set current letter to "L"]
> 4 [4 != 5, so store and say "L". Set current letter to "G"]
> 4 [set current letter to "H"]
> 4 [set current letter to "I"]
> 7 [7 != 4, so store and say "I". Set current letter to "P"]
> 7 [set current letter to "Q"]
> 7 [set current letter to "R"]
> 7 [set current letter to "S"]
> 6 [6 != 7, so store and say "S". Set current letter to "M"]
> 6 [set current letter to "N"]
> 6 [set current letter to "O"]
> (User waits for timeout) [Store and say "O". Set current letter to ""]
> 6 [set current letter to "M"]
> 6 [set current letter to "N"]
> * [store and say "N". We now have "ALISON". Go to next context]
>
> For the sake of your own sanity  (or that of your unlucky successor),  use
> maningful labels in your GoToIf() statements; and be sure to comment the
> resulting code liberally, so it looks a little bit less of an unwholesome
> mess.
>

Yes I agree.

I also thought of using some IP Phone supporting custom XML application as
having a feedback on screen is helpful.

Anyway, my question is about Speech recognition as this could be faster and
portable to any handset.
I've given Google Speech Web API a short try, and it is not capable to
recognize letters: when I spelled "A", it recognized "Air" !

>
>
> --
> AJS
>
> Note:  Originating address only accepts e-mail from list!  If replying off-
> list, change address to asterisk1list at earthshod dot co dot uk .
>
> --
> _____________________________________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
> New to Asterisk? Join us for a live introductory webinar every Thurs:
>                http://www.asterisk.org/hello
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20160323/4b654c46/attachment.html>