> By adution threshold, I assume you mean what I call the threshold in
> quiet? This would actually be very easy to implement. I modified
> calc_noise a while ago to return the total quantization noise in each
> band. With that formula (do you have a reference?) it would be easy
> to compute the noise above the adution threshold and calculate a new
> quality metric to use when comparing quantizations with the same value
> of "over".
Yes, this is the minimal audition threshold in quiet. It comes from the
paper "dsp97.ps" : A review of algorithms for perceptual coding of digital
audio signal, by Ted Painter and Andreas Spanias
> You have to do some work to decifer it: look up the MDCT coefficients
> which belong in each band. Knowing the sampling rate and MDCIT
coefficient
> index you can compute the frequency.
I'd like to, but I don't have the mathematical background to do it.
Gabriel Bouvigne - France
[EMAIL PROTECTED]
icq: 12138873
MP3' Tech: www.mp3tech.org
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