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DCT
Last modified: Thursday, February 13, 2003 

Short for Discrete Cosine Transform, a technique for representing waveform data as a weighted sum of cosines. DCT is commonly used for data compression, as in JPEG. This usage of DCT results in lossy compression. DCT itself does not lose data; rather, data compression technologies that rely on DCT approximate some of the coefficients to reduce the amount of data.

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data compression

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