[vorbis-dev] mdct

[Segher Boessenkool]

Hello,

Argh. 2nd time I mail to vorbis-dev at xiph.ogg (note the typo |-)

Anyway, what is the exact formula for the forward and reverse mdct?
And the blocklengths? My guess:

b_k = sum{j=0 to N-1) a_j cos(2k+1)(2j+1)/4N*PI  (both mdct's)

blocklength is 256/2048 for short/long?

and the mdct window is some generic function, i.e. not always a sine window?

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