Jan Peman wrote:
> On Wed, 21 Oct 1998, Laukala Juha wrote:
> ...
>
> > step = pow(2.0, quantizerStepSize * 0.25);
> > dest[counter] = nint(pow(fabs(source[counter]) / step, 0.75) - 0.0946);
> ...
>
> >Oh.. and anyone knows why the -0.0946 in the code above? Just curious..
> the AAC encoder has this too.. (neither the mp3 or aac standards explains
> why..)
>
> /Jan
I� don�t know why this number is -0.0946 (and why not -0.0945..?), but with
a �MATLAB� simulation
of a quantizer with this number compared with another without it, it seems
that the result of the
presence of this number is a try to �smooth� the quantization�s curve ( it�s a
hypothesis ).
Davide
