Yes, it's better like this. I apologize for my mistake.
It seems that the ISO ATH is computed from this formula, as it gives the
exact same values as most of those mentionned in tables D1.
Gabriel Bouvigne - France
[EMAIL PROTECTED]
icq: 12138873
MP3' Tech: www.mp3tech.org
----- Message d'origine -----
De : Robert Hegemann <[EMAIL PROTECTED]>
� : <[EMAIL PROTECTED]>
Envoy� : mardi 29 juin 1999 21:00
Objet : Re: [MP3 ENCODER] quantization error
> >
> > For the value of this threshold, I suggest using a table giving the
minimum
> > of the audition threshold in the frequency range of each subband. The
> > following formula gives the human minimal audition threshold of a young
> > people with very good hearing, f beeing the frequency:
> >
> > 3.64*(f/1000)^(-0.8)-6.5*e^(-0.6)*(f/1000-3.3)^2+10^(-3)*(f/1000)^4
> ~~~~~~~~~~~~~~~~~~~
> Is this formula correct?
> I think you thought of this
>
> 3.64*(f/1000)^(-0.8)-6.5*e^(-0.6*(f/1000-3.3)^2)+10^(-3)*(f/1000)^4
>
> taken from Lincoln, Bosse., MUS420 Project, 1997, page 7
> http://www-ccrma.stanford.edu/~bosse/
>
> >
> > Gabriel Bouvigne - France
> > [EMAIL PROTECTED]
> > icq: 12138873
> >
> > MP3' Tech: www.mp3tech.org
> >
>
> With figure 1 on the same page in mind, shouldn�t we avoid any distortions
> for frequencies where the absolute threshold of hearing is less than ie
1dB?
> Penalizing distortions in bands among this function would be a good idea.
>
> Robert
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