@3dsnar, you seem to be very confident about ...what?
Anyway, I myself won't engage in such flip-flop games any more.
http://en.wikipedia.org/wiki/MATLAB : something that costs money for what I do not owe.
http://en.wikipedia.org/wiki/Hilbert_transform : seems to be the logic for transforming a square wave form to a strange curve with 90 deg. phase shifts
Possibly we can find the corresponding function in any forms of avisynth/sox plugin..
It's gonna take a long while to prepare the verification test.... oh well, nothing to believe.
It seems it has just lengthened the route further, forcing me to continue my own approach.
At least, I believe I have proved the reference model 4 better than 2 practically, and 1/3 better than 2/4 theoretically. period.
/fooled