Contents

vDSP.DCTTransformType.II

A constant that represents a type-II discrete cosine transform.

Declaration

case II

Discussion

The type-II DCT uses the following operation for a discrete cosine transform:

// `N` is the length given in the setup.
// `h` is the input array that contains real numbers.
// `H` is the output array that contains real numbers.

For 0 <= k < N
    Or[k] = sum(Ir[j] * cos(k * (j+1/2) * pi / N, 0 <= j < N)

See Also

Discrete Cosine Transform Type Constants