[Vorbis] Vorbis for non audio stream

[vincenzo cacciatore]

Thanks Christopher for your answer.
I know human ear  is like a band-pass filter so we can eliminate
frequency that brain doesn't understand, but if i know the degree of
distorcion introduced by vorbis i could compact a general waveform and
declare the distorsion. In some enginnering applications precision is
less interesting than high compression.

Thank you too,

Melvi


2005/7/11, Christopher Harrington <webkid at webkid.com>:
> Vorbis is tuned for human audio. That means that the distortion it
> introduces will look completely nonsensical in terms of what data it
> discards, and what data it chooses to keep.
> 
> Your brain "hears" audio differently than it exists in the form of a
> wave; there are certain things you don't hear, even though they are
> present. And, sometimes you "hear" what isn't even there, because of the
> way your brain interprets sound.
> 
> The bottom line is that Vorbis discards data based on what your brain
> would also discard when listening to sound. This makes it very
> unsuitable for compressing anything that isn't going to be listened to
> by a human.
> 
> If you must compress a waveform, do it losslessly. Any lossy waveform
> compression you will find will be optimized for humans, and that's not
> what you want.
> 
> See... http://flac.sourceforge.net/
> 
> -Chris
> 
> vincenzo cacciatore wrote:
> > Hi all!
> > I would like to use Ogg-Vorbis to encode a non audio waveform. My
> > waveform is in .wav format, on 16 bit mono, with frequency range from
> > 100Hz to 100MHz. It's about 100MB lenght.
> > I need to compact it with lossy for net transfer.
> > Is there something like this, already done, that can help me ??
> > How can I measure the distortion that Vorbis introduce?
> >
> > I'm sorry for my bad english.
> >
> > Thanks,
> >
> > Melvi
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