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sideline
2003 Jul 23
6
window function
Dear Sebastian and all,
This is a Japanese to live in Japan.
I have a question.
Ogg's window functon is
f(x)=sin(1/2*pi*sin^2((x+0.5)/n*pi)) for 0 <= x < n
But I cannot understand why this window function satisfys
the equation
f^2(x)+f^2(x+n/2)=2
which is for MDCT's perfect signal reconstruction.
reference:
Analysis/Synthesis Filter Bank Design Based on Time Domain Aliasing