Re: [MP3 ENCODER] various questions (was: Some suggestions for LAME - please review)

[Robert Hegemann]

Hi Gaby

> Why can we read in the litterature that humans got 25 CB but mp3 uses only
> 22?

        let us try to get it in order:

        bark scale is used by the spreading function
        Bark 0 : 0-100 Hz,  Bark 24: 15.5 - 20.4 kHz

        masking is calculated for convolution bands
        Lame uses 64 equidistant convolution bands from 0 Hz up to Nyquist

        each of the 22 scalefactor bands is responsible for a group of
        subbands (the convolution bands), but we have only 21 scalefactors
        (12 scalefactors w/ short blocks)


        Ciao Robert



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