Implementation of DCT and iDCT:

Usage:

(defparameter *input-vector* #(5 8 3 7 2))

(dct *input-vector*)
;; #(11.18034 2.176251 -1.2472882 0.51374316 -4.409566)

(idct *input-vector*)
;; #(11.576193 -0.61010736 1.6036125 1.8629377 -3.2522953)

For more details on the equation and the references, look into the doc folder.

License

MIT