The Discrete Cosine Transform (DCT)

Algorithms for the Discrete Cosine Transform (DCT) appeared in Dr Dobb's Journal, #297, March 1999. I have translated them into PL/I, expressing them using PL/I's fast scaled fixed-point binary facilities.

The first is the one-dimentional 8-point algorithm.

The second is the two-dimensional 8 x 8 (64-point) algorithm.

9th May 1999.