[Vorbis] Question on Quality factor, Bitrate and decode table

[Monty]

On Sun, Oct 17, 2004 at 03:53:59PM +0800, illiminable wrote:
> 
> ----- Original Message ----- 
> From: "Christopher John Harrington" <webkid at webkid.com>
> Cc: <vorbis at xiph.org>
> Sent: Sunday, October 17, 2004 3:25 PM
> Subject: Re: [Vorbis] Question on Quality factor, Bitrate and decode table
> 
> 
> >Geoff Shang wrote:
> >>An upper limit makes sense, but why the 96kbps minimum?  Are they 
> >>seriously suggesting that their players won't play anything encoded at -q 
> >>< 2?
> >
> >It's certainly an oddity, but for example the Neuros device has a very 
> >hard time playing -q0 streams. It may have something to do with limited 
> >buffer space in terms of packets? I'm not sure.
> >
> 
> Not that i know anything about it... but would it be a possibility that 
> certain optimisations have been done for certain codebooks. I really don't 
> know enough about the vorbis codebooks... but is there a boundary at q2 
> where a different codebook starts being used ?

Yes, but they're not substantially different.  no real changes happen
until below -q0.

Monty