  In this paper we propose a generic algorithm to calculate the rotation
parameters of CORDIC angles required for the Discrete Cosine Transform
algorithm (DCT). This leads us to increase the precision of calculation meeting
any accuracy.Our contribution is to use this decomposition in CORDIC based DCT
which is appropriate for domains which require high quality and top precision.
We then propose a hardware implementation of the novel transformation, and as
expected, a substantial improvement in PSNR quality is found.
