Discrete Cosine Transform
Discrete Cosine Transform
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DOI:
10.1142/9789812810298_0015
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发表时间:
1996-04
期刊:
影响因子:
--
通讯作者:
S. Merrill Weiss
中科院分区:
文献类型:
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作者:
S. Merrill Weiss
The discrete cosine transform (DCT) is a Fourier-related transform similar to the discrete Fourier transform (DFT), but using only real numbers. It is equivalent to a DFT of roughly twice the length, operating on real data with even symmetry (since the Fourier transform of a real and even function is real and even), where in some variants the input and/or output data are shifted by half a sample. (There are eight standard variants, of which four are common.)