[Vorbis] Question on Quality factor, Bitrate and decode table
xiphmont at xiph.org
Mon Oct 18 13:39:04 PDT 2004
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.
More information about the Vorbis