[asterisk-dev] Speech Recognition

[Adam Robins]

The problem you describe in item 1 is still happening to me in 1.4 beta
2.  I've described it previously on the speech-rec mailing list.  Was it
fixed recently (within the past week)? 

-----Original Message-----
From: asterisk-dev-bounces at lists.digium.com
[mailto:asterisk-dev-bounces at lists.digium.com] On Behalf Of Joshua Colp
Sent: Friday, October 13, 2006 5:09 PM
To: Asterisk Developers Mailing List
Subject: Re: [asterisk-dev] Speech Recognition

Stephan A. Edelman wrote:
> Hello,
> However, I have noticed several problems with the Speech API:
> 
> (1)     When loading another grammar, it still appears to be
processing 
> voice frames from a previous recognition cycle. This is noticeable as
> SpeechBackground() is silent immediately when called without playing 
> the sound file and even after SpeechStart() is called again. I have 
> been able to correct this problem by introducing 
> *ast_clear_flag(speech,
> AST_SPEECH_QUIET);* in the ast_speech_start() function of 
> res/res_speech.c, as follows:
> 

I agree with this too, fixed in 1.4 and trunk. A new 1.2 patch should be
available from Lumenvox next week as well.

> 
> (2)     SpeechCreate() does not seem to report the correct status 
> (${SPEECH(status)}) when using the Lumenvox engine and there are no 
> more available licenses. This causes a subsequent call to
> SpeechActivateGrammar() to drop the call. In fact, it doesn't make 
> sense to me at all to have any of the Speech...() functions return -1 
> and cause the call to be hung up. This doesn't allow for any DTMF
fallback schemes.
> 
> Can we have the Speech...() functions in apps/app_speech_utils.c set
the 
> ${SPEECH(status)} variable appropriately instead? Any comments?
> 

I just took care of this in 1.4 and trunk. Give it a whirl.

> 
> (3)     SpeechBackground(Sound File|timeout) should treat a zero
timeout 
> as meaning "timeout immediately after playing the sound file". This 
> allows you to call SpeechBackground() back-to-back without any delay.
> Presently, a zero timeout means that it waits indefinitely for the 
> user's voice response. If no timeout is specified as a parameter then 
> it should behave with an indefinite timeout.
> 

Ideally I would like to move this application to use the file API for 
all this stuff instead of having to recreate some of the logic.

Final note:

If there's any other comments you have please do reply, I want the 
speech API to evolve to the needs of both the developers and the users.

-- 
Joshua Colp
Software Developer
Digium, Inc.
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