[speex-dev] Complexity vs BitRate

Tom Harper tharper at sightspeed.com
Thu May 6 22:24:57 PDT 2004

Jean Marc,

So assuming the quality setting was set as high as possible,
and the audio stream was 8000 hz, 16 bit mono, I have two follow
up questions:

1. Does the complexity setting override the quality setting, or does
increasing the complexity only lower the rate at a given quality?
Or would setting both higher increase the quality more?

2. What sort of impact would setting quality as high as
possible have on the data rate?  Is there a theoretical upper bound
on the VBR data rate (assuming no ABR average rate was set?).



At 09:58 PM 5/6/2004, Jean-Marc Valin wrote:
> > When I set a bit-rate on VBR is that the max that the VBR will go to in a
> > given second or how exactly does that work
>Setting a bit-rate for VBR actually means ABR. What you probably want to
>do is set is the VBR quality (SPEEX_SET_VBR_QUALITY).
>         Jean-Marc
>Jean-Marc Valin
>Université de Sherbrooke, Québec, Canada


Tom Harper - tharper at sightspeed.com
Lead Software Engineer
SightSpeed - A Roda Group Affiliated Company

918 Parker St, Suite A14
Berkeley, CA 94710

Phone: 510.665.2920
Cell: 415.378.3779


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