Re: [MP3 ENCODER] efficiently do multiple bitrates at once?

[Segher Boessenkool]

> On Mon, 19 Jun 2000, Segher Boessenkool wrote:
> 
> [snip]
> > > is different and frequency distribution is different due to filters.
> > 
> > You first filter and _then_ do the psycho acoustics? That's broken, IMHO.
> [snip]
> 
> I don't agree, in MP3 the psycho acoustics are there to determine masking
> of distortion. I.e. I can handle 3db of noise in SFB4 because SFB5 is X
> loud and the distortion will be inaudiable. If you calculate the psycho
> acoustics before filtering you might assume masking that doesn't exist.

Ok. But then, you really should do the psychoacoustics _after_ you have
done the quantization. Oops, did I just here the universe implode? ;-)

Dagdag,

Segher

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