[Speex-dev] Jitter buffer

[Steve Kann]

Danny Chan wrote:

>Hi Jean and Steve,
>
>Can you tell me whether the jitter filter / buffer is adaptive type, I
>saw the description of speex_jitter.h say it is "adaptive", anyone of
>the group has implemented it and confirm it.
>  
>
I believe it is adaptive, but no, I haven't used it, because it's 
coupled only to the speex codec.  We're working on a generic application 
and codec-independent jitter buffer algorithm, for use in asterisk and 
iaxclient (at least).  Some information is available at 
http://www.voip-info.org/tiki-index.php?page=Asterisk%20new%20jitterbuffer

-SteveK

>Thank you all.
>
>
> 
>Regards,
> 
>Danny Chan
>
>-----Original Message-----
>From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On
>Behalf Of Jean-Marc Valin
>Sent: Tuesday, September 07, 2004 11:32 PM
>To: Steve Kann
>Cc: speex
>Subject: Re: [Speex-dev] Jitter buffer
>
>On mar, 2004-09-07 at 09:48 -0400, Steve Kann wrote:
>  
>
>>It's only 300 lines of C, so it shouldn't take very long for you to 
>>study it --  it's not part of the codec proper.   I haven't used it,
>>but 
>>the advantage would be that (I believe) it supports interpolation of 
>>lost frames, which your jitter buffer may not support.
>>    
>>
>
>The interpolation of lost frames (PLC) is actually done within the
>codec, so the jitter buffer just needs to ask for it. Another thing that
>this jitter buffer supports (though I've never tested it seriously) is
>support for multiple frames per packet. 
>
>	Jean-Marc
>
>
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>  
>

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