[vorbis-dev] Stereo mode settings

Segher Boessenkool segher at kernel.crashing.org
Mon Feb 16 04:51:07 PST 2004



>>> 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 ;-) )

Well it was not exactly what I thought.  So I started investigating
other "suspicious" things.

> BTW: Apologies for that (small) attachmet.
> I've no place to put it on the web anywhere.

No problems with that...

<p>That picture looks _really_ strange.  I'll investigate some more...

Could you make a picture with logarithmic frequency scale, too, please?
Mail me privately if you think it clobbers the list...

<p>Segher

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