DCT2

CosineTransformForwardMatrix_DCT2 Discrete Cosine Transform (DCT-II) matrix.

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Declaration

 matrix = DCT2(N)

Parameters

• N input argument N

Returns

• matrix output value matrix

Discussion

CosineTransformForwardMatrix_DCT2 Discrete Cosine Transform (DCT-II) matrix Forward scaling: 2/N (no extra endpoint halving here). With this choice, the inverse (DCT-III) is the plain cosine matrix with the DC (first) COLUMN halved. If X = CosineTransformForwardMatrix_DCT2(N) * x, then x = InverseCosineTransformMatrix_DCT2(N) * X. See also: InverseCosineTransformMatrix_DCT2