Speex dev - Aug 2007 - Jitter buffer latency

Hi,

I'm trying to use the jitter buffer feature that comes with Speex but
I'm getting unexpected latency.  I wrote a client application that does
VOIP-like functions and without using jitter buffer, the end-to-end latency is
around 250 ms (I'm using lowband 5.97 kpbs).  However, when I tried to
incorporate the jitter buffer feature, the latency would grow as time elapsed
(up to a few seconds).  I tried hacking the code by changing the
SPEEX_JITTER_MAX_BUFFER_SIZE constant in jitter.c from 200 to 20 and the latency
went down to around 300ms.  Am I doing something wrong in my application code? 
Please advise.

Thanks.

Regards,
Andy

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> I'm trying to use the jitter buffer feature that comes with Speex but
> I'm getting unexpected latency.  I wrote a client application that
> does VOIP-like functions and without using jitter buffer, the
> end-to-end latency is around 250 ms (I'm using lowband 5.97 kpbs).
> However, when I tried to incorporate the jitter buffer feature, the
> latency would grow as time elapsed (up to a few seconds).  I tried
> hacking the code by changing the SPEEX_JITTER_MAX_BUFFER_SIZE
> constant in jitter.c from 200 to 20 and the latency went down to
> around 300ms.  Am I doing something wrong in my application code?
> Please advise.
Most likely you're doing something wrong. Have a look at speexclient (in
svn) for an example of how to use it.

	Jean-Marc