Generic-Precision algorithm for DCT-Cordic architectures

TL;DR

This paper introduces a generic algorithm for high-precision DCT calculations using CORDIC, improving accuracy and image quality in hardware implementations.

Contribution

It presents a novel decomposition method integrated into CORDIC-based DCT for enhanced precision and quality in hardware applications.

Findings

Significant PSNR improvement observed.

High-precision DCT achieved with the proposed algorithm.

Hardware implementation demonstrates enhanced performance.

Abstract

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.