[vorbis-dev] Stereo mode settings
sgeseman at upb.de
Sat Feb 14 05:46:51 PST 2004
On Fri, 6 Feb 2004, Segher Boessenkool wrote:
> > You could test this effect on monoaural files.
> > The "HF boost" will still be present.
> > It's because of heavy quantization. The SNR is *so*
> > low at high frequencies in low bitrate modes, that the
> > quantization error increases energy noticably.
> Ooh, if *this* causes that "HF boost" problem, I know how
> to fix it (I fixed it for Lame a few years ago ;-) )
I already pointed that out a year ago (or so), but nobody
seemd to care. Here's another somewhat more meaningful test
picture than the last one I sent. It should speak for itself.
The "boost" is clearly related to the SNR.
> Stay tuned...
I do ;)
<p>BTW: Apologies for that (small) attachmet.
I've no place to put it on the web anywhere.
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