Discrete Cosine Transform (DCT)
Discrete Cosine Transform (DCT)
Discrete Cosine Transform (DCT)
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<strong>DCT</strong>-IV:<br />
f<br />
j<br />
=<br />
∑ − n 1<br />
k = 0<br />
x<br />
k<br />
π<br />
cos[ ( j<br />
n<br />
<strong>DCT</strong>-IV matrix is orthogonal (up to a<br />
scale factor).<br />
M<strong>DCT</strong> is based on <strong>DCT</strong>-IV with<br />
overlapped data.<br />
+<br />
1<br />
)(<br />
2<br />
k<br />
+<br />
1<br />
)]<br />
2<br />
9