[vorbis-dev] Spectral phase information in residue vectors

[Monty]

On Tue, Oct 22, 2002 at 10:21:43PM +0200, Stoffke wrote:
> I found this sentence in the Ogg format specs:
> http://www.xiph.org/ogg/vorbis/doc/vorbis-spec-res.html
> "A residue vector may represent spectral lines, spectral magnitude, spectral phase or hybrids as mixed by channel coupling."
> 
> But where does the spectral phase information come from ?
> AFAIK  MDCT doesn't provide any phase information.
> And in OGG-encoding, MDCT is taking place a few steps before computing
> the residue vectors.

'phase', at least as I had intended in that example, is the elliptical
angle between two channels, phase being a synonym for angle.

Monty
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