[Speex-dev] Change target VBR on-the-fly?

Tom Grandgent tgrand at canvaslink.com
Fri Apr 11 14:39:26 PDT 2008


Yes, you can change VBR quality or ABR average bitrate at any time.  
You don't need to do anything special.  I use this feature (changing 
VBR quality midstream) from time to time and it's quite convenient.


Joshua Gargus <schwa at fastmail.us> wrote:
> Hi there (from speex-dev newbie),
> Is it possible to change the target VBR on the fly?  The application  
> is a virtual world with multiple media types (voice, video, 3d  
> interaction, VNC, etc.) where the total required bandwidth has high  
> variability.  Sometimes we'll be able to spare 30kbps per speaker, and  
> and other times we will need to restrict the bandwidth considerably.   
> It would be a shame to always make the worst-case assumption, even  
> though the bandwidth might usually be available.
> I was going to ask if there are any other speech codecs (commercial or  
> otherwise) that support this capability, but I guess not since Speex  
> is the only one that supports VBR (according to http://speex.org/comparison/) 
> ..  Right?
> Thanks,
> Josh

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