[vorbis] Pre RC4 changes

Monty xiphmont at xiph.org
Mon Jul 1 15:47:50 PDT 2002



On Tue, Jul 02, 2002 at 01:31:02AM +0200, Peter Schuller wrote:
> > "Ogg Vorbis files use lossy channel coupling, meaning that redundancies
> > between the left and right channels are combined to save space."
> > 
> > If you can, please explain that. (give examples if you can).
> > How this differs from having the original stereo image? (quality??)
> 
> I think that partiuclar part is a bit mesleading. My understanding is
> that mp3 uses *lossless* channel coupling (joint-stereo)

Incorrect.  joint is usually lossy, and the way most encoders do it
(to avoid the 1 bit + 1 bit == 2 bits problem) is *always* lossy).
 
> while Ogg
> Vorbis supports both *lossless* and *lossy*.

Yes, and can move smoothly along that spectrum.

Monty

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