COMPARATIVE PERFORMANCE OF FAST COSINE TRANSFORM WITH FIXED-POINT ROUNDOFF ERROR ANALYSIS

In this correspondence, suitable scaling schemes are chosen for the Le e's and the Hou's fast DCT algorithms, and the relative fixed-point ro undoff error analyses are carried out, respectively. The average outpu t signal-to-noise ratio are then calculated, and it is shown that in D CT and for N > 16 stage-by-stage scaling of Hou's algorithm has the be st performance, whereas in inverse DCT, the global scaling of either a lgorithms has the best. performance.