High-performance DCT architecture based on angle recoding CORDIC and Scale-Free Factor

In this paper, the authors proposed highperformance DCT architectures based on Coordinate Rotation Digital Computer (CORDIC). The implementations deployed Adaptive angle recoding CORDIC (ACor) method and Scale-Free Factor (SFF) technique. There are two models presented in the paper: ACor-based Chen-DCT (ACor-DCT-C) and ACor-based Loeffler-DCT (ACor-DCT-L). The critical path in both models is six adder-delay. The experimental results give the coding gain performances of 8.8238 dB and 8.8229 dB for ACor-DCT-C and ACor-DCT-L, respectively. The mean-square-error (MSE) results are 6.27e-6 and 4.42e-4 for ACor-DCT-C and ACor-DCT-L, respectively. Each design requires 36 adders and 16 shifters in its implementation.