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Wavelab Toolbox >> Wavelab Toolbox > One-d Wavelet- and Cosine- Packet Tools > dct_iv

dct_iv

Type (IV) Discrete Cosine Xform

Calling Sequence

c = dct_iv(x)

Parameters

Inputs:

x :

1-d signal, length(x) = 2^J

Outputs:

c :

1-d cosine transform, length(x)=2^J

Description

The form c = dct_iv(x) computes c defined by c_m = sqrt(2/N) * sum_n x(n) cos( pi * (m-.5) * (n-.5) / N ) where 1 <= m,n <= N, N = length(x) = length(c)

To reconstruct, use the same function: x = dct_iv(c)

See also

Authors

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