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Algorithm Alley

By Tim Kientzle, March 01, 1999

The Discrete Cosine Transform (DCT) is a crucial part of modern image and sound compression. Tim discusses several fast algorithms for computing the 8-point DCT and IDCT.
Mar99: Algorithm Alley

Implementing Fast DCTs

By Tim Kientzle

Dr. Dobb's Journal March 1999

Figure 7: Arai, Agui, and Nakajima DCT algorithm (from JPEG: Still Image Data Compression Standard). Boxes represent multiplication. a1=0.707, a2=0.541, a3=0.707, a4=1.307, a5=0.383.

Copyright © 1999, Dr. Dobb's Journal


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