Speex dev - Mar 2005 - concealment

Hi,

I'm a developer currently using the speex codec in a VOIP application of
ours.. It sounds amazing, especially at wideband.. my question is how do I force
it to do a concealment?  We have a low latency application, and based on the
current API, I'm guessing concealment only kicks in when a packet is lost..
However, our jitter buffer knows when a packet is missing, and I'd like to
force speex to do a concealment then.. Is this possible?

Thanks.
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Hi,

I'm not quite sure I understand your question. Basically, the way the
concealment works in Speex is that if instead of giving the decoder a
packet, you just send NULL, it will "interpolate a frame" (i.e. do
concealment). The decoder doesn't care if the packet is lost, late or if
you just didn't feel like decoding it.

	Jean-Marc
> I'm a developer currently using the speex codec in a VOIP application
> of ours.. It sounds amazing, especially at wideband.. my question is
> how do I force it to do a concealment?  We have a low latency
> application, and based on the current API, I'm guessing concealment
> only kicks in when a packet is lost.. However, our jitter buffer knows
> when a packet is missing, and I'd like to force speex to do a
> concealment then.. Is this possible?
>  
> Thanks.
> _______________________________________________
> Speex-dev mailing list
> Speex-dev@xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev
-- 
Jean-Marc Valin <Jean-Marc.Valin@USherbrooke.ca>
Universit? de Sherbrooke