Generic-Precision algorithm for DCT-Cordic architectures
This addresses precision issues in CORDIC-based DCT implementations for domains requiring high quality, though it appears incremental as it builds on existing methods.
The paper tackles the problem of calculating rotation parameters for CORDIC angles in Discrete Cosine Transform (DCT) algorithms by proposing a generic algorithm that increases precision to meet any accuracy requirement, resulting in a substantial improvement in PSNR quality.
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.