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Discrete cosine transform

A discrete cosine transform (DCT) expresses a finite sequence of data points in terms of a sum of cosine functions oscillating at different frequencies. The DCT, first proposed by Nasir Ahmed in 1972, is a widely used transformation technique in signal processing and data compression. It is used in most digital media, including digital images (such as…

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Computation

Example of IDCT

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Discrete cosine transform

Nodes301
Edges300
Triples211
Avg. degree1.99
Density0.006645
Components1

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Discrete cosine transform

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related to Further reading · 95
Discrete cosine transform → Acoustics, Ahmed, Alan, Alshibami, April, Artech House, Bibcode, Boston, Boussakta, BP, Buck, Burrus, Cambridge University Press, Cheng, Cite, CiteSeerX, Communications, Computation, Cosine Transform, DCT-II
related to history · 34
Discrete cosine transform → Ahmed, Arlington, Chen, DCT, DCT-II, Fralick, Further, Harrison Smith, IDCT, II DCT, III, In, It, January, Joint Photographic Experts Group, JPEG's, Kansas State University, Lee, Narasimha, Nasir Ahmed
related to External links · 29
Discrete cosine transform → Algorithm Alley, ApplicationImplementation, DCT, DCTs, DSTs, Fast, FFT Package, FFTW, FFTW Home Page, FORTRAN, Free, General Purpose FFT Package, GPL, I-IV, IDCT, II, III, ISO/IEC, Johnson, LTFAT
related to DCT V-VIII · 14
Discrete cosine transform → By, DCT, DCT-I, DCT-II, DCT-IV, DCTs, DFT, DFTs, III, In, IV, N-1, The, V-VIII
related to Formal definition · 5
Discrete cosine transform → DCT, Formally, N-1, The, There
see also · 4
Discrete cosine transform → Contains, DCT, Discrete, Fourier-related
related to DCT-IV · 3
Discrete cosine transform → DCT-IV, MDCT, The DCT-IV
is a · 2
Discrete cosine transform → linear, type-II DCT

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Important terminology

dct transform compression even displaystyle dcts dft algorithm data signal dct-ii discrete used cosine algorithms fast processing video also digital

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Discrete cosine transformis atype-II DCT0.90text
Discrete cosine transformis alinear0.90text
the inverse operation between display color formatsinstance ofdecoding operations0.80text
JPEGinstance ofIt is used in image compression standards0.80text
and video compression standards such as H.26xinstance ofIt is used in image compression standards0.80text
MJPEGinstance ofIt is used in image compression standards0.80text
MPEGinstance ofIt is used in image compression standards0.80text
DVinstance ofIt is used in image compression standards0.80text
Theorainstance ofIt is used in image compression standards0.80text
Daalainstance ofIt is used in image compression standards0.80text
the 3-D DCT-IIinstance ofmainly 3-D DCTs0.80text
which has several new applications like Hyperspectral Imaging coding systemsinstance ofmainly 3-D DCTs0.80text

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