[Ffmpeg-devel] [PATCH] Which Vorbis encoder by default

Luca Barbato lu_zero
Tue Oct 3 21:19:29 CEST 2006

Oded Shimon wrote:

> I think this method doesn't apply as well to audio as it does to video... 
> You can't play guessing games with the quantization because you can change 
> it anywhere to anything, as opposed to being a global constant (for the 
> single frame)...

the two text in google scholar should tell you almost everything you
need, the basic idea is that one:

given a profile between frequency and amplitude and the surrounding of
the samples you can pick a quantizer within a certain range knowing that
you cannot really heard the difference because the distortion is either
canceled by the neighbors contribute or in itself isn't strong enough
for the frequency.

(I know somebody will kill me for this ugly explanation but I think is
ok for an introduction)



Luca Barbato

Gentoo/linux Gentoo/PPC

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