I remember seeing in one of their patents (can't remember which one) that
they were trying to minimise the noise in the low part of the spectrum, and
then only after they try, if possible, to minimise the noise in the upper
part.
I personnally think that minimising the noise in the most sensitive part of
the spectrum (according the the Fletcher & Munson curves) is more important
than in both ends of the spectrum.
So maybe we could imagine to start allocating bits starting from the middle
subband (according to ear sensitivity), like about 1500-2000 Hz, and then
allocating the just lower subband, then the just higher,...
Or perhaps an assymetrical process, as the very high frequencies are less
important than the lowest ones, in term of quality.
What do the people on this list think about such a bit allocation process
starting from the middle subband?
Regards,
Gabriel Bouvigne - France
[EMAIL PROTECTED]
icq: 12138873
MP3' Tech: www.mp3tech.org
----- Message d'origine -----
De : Piter B. <[EMAIL PROTECTED]>
� : <[EMAIL PROTECTED]>
Envoy� : mercredi 15 d�cembre 1999 14:32
Objet : [MP3 ENCODER] Psycho in fraunhofer's
>
> Hey!
>
> Look at attached image. In fraunhofer codec there is better S/N ratio
> at low frequency (below 9 kHz). In Lame we have flat noise distribution.
> Maybe sombody implement this model of psychoacustic in LAME...
>
> Regards,
>
> Piotr Borowski
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