[Freeswitch-users] Am I using play_and_detect_speech correctly?

Wed Aug 1 12:48:46 MSD 2012

Hi Chris,

Many thanks for your info and suggestions!

Would you please tell me a bit more or any clue about the idea of using detect_speech APP to handle
barge-in over ESL? It is an interesting idea to try but for now I don't have any clue how it could be
done over Java ESL without touching or modifying detect_speech APP codes.

Thanks again!

Best regards,

Xing

-----Original Message-----
From: freeswitch-users-bounces at lists.freeswitch.org on behalf of Christopher Rienzo
Sent: Tue 7/31/2012 13:44
To: FreeSWITCH Users Help
Subject: Re: [Freeswitch-users] Am I using play_and_detect_speech correctly?

I looked over the code again last night and verified that
play_and_detect_speech should try to stop detection before loading the
grammar.  However, that scenario is not really tested, so try the
workaround first.  If that doesn't work, open a jira ticket with detailed
logs so it can be fixed.

You can use the detect_speech APP to do everything over ESL.  It is a lot
more work, but once you figure it out, you have the freedom to do whatever
you want, including handling barge-in.  play_and_detect_speech is designed
to handle the typical use case.

Chris

On Tue, Jul 31, 2012 at 3:59 AM, x.liu <x.liu at hw.ac.uk> wrote:

>  Hi Chris,
>
> Okay, thanks! I will have tries to see how it works.
>
> For the normal use of the app: play_and_detect_speech, will it resume
> previous ASR session,
> or will it stop previous session and restart a new session each time when
> I issue it via ESL?
>
> For the app of detect_speech, I can first to start an ASR session by
> "detect_speech speechMod grammar grammarPath",
> then I can do "detect_speech pause", or "detect_speech resume" or
> "detect_speech stop".
> But for play_and_detect_speech, I am not sure how it works in terms of
> starting, pause, resume/restart sequence.
>
> The play_and_detect_speech is a very good, useful app as it supports the
> barge-in. So we definitely need to use it.
>
> Thanks!
>
> Xing
>
>
>
>
>
> On 07/31/2012 12:53 AM, Christopher Rienzo wrote:
>
> You are using that APP in a way that hasn't been tested.  Try to do
> "speech_detect pause" and see if that helps.  It will reserve your ASR
> session for reuse while "speech_detect stop" will tear it down completely.
>  If that doesn't work, open a jira ticket and attach a full call trace.
>  It's difficult to understand exactly what is happening from your
> description.
>
>
>  Chris
>
>
>
> On Mon, Jul 30, 2012 at 5:38 PM, Liu, Xingkun <X.Liu at hw.ac.uk> wrote:
>
>>  Hello,
>>
>> I am using play_and_detect_speech with Java ESL in my IVR applications.
>>
>> Previously I call it again each time after I receive any recognition
>> event,
>> like recognition complete, no-input-timeout, or recognition-timeout,
>> it seems to work fine.
>>
>> Now I have changed my app to issue play_and_detect_speech command based on
>> my available system utterances as well as the speech event.
>>
>> I.e., I use a separate thread to constantly check if there is a system
>> utterance coming in
>> from another component of my application, if there is any utterance I
>> issue the command which will
>> speak the new utterance and listen to user input no matter whether or not
>> previous
>> command has finished. And if there is any speech event (recognition
>> result, timeout etc.)
>> the play_and_detect_speech command is also issued but with playing
>> silence.
>>
>> Obviously the new command will stop the utterance speaking of the
>> previous command if it is not finished.
>>
>> My question is
>>
>> will the new play_and_detect_speech command also stop the previous ASR
>> listening
>> or will there be many ASR listening channel and sending speech data (or
>> silence) to ASR server?
>>
>> Do I need to explicitly issue a "stop" commnad before issuing a new
>> play_and_detect_speech?
>> If yes, how to do that, by "detect_speech stop"?
>>
>> Recently there is a network traffice problem (lots of connections /data
>> transportation to the ASR server machine)
>> when I am running my application. I am not sure if this is because of
>> other issues
>> or because of my new changes to the way of using play_and_detect_speech.
>>
>> Please any one could shed a light on this?
>>
>> Many thanks!
>>
>> Xing
>>
>>
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