New recursive VLSI architectures for forward and inverse discrete cosine transform
Maurice F. Aburdene, Jian-Qing Zheng, Richard J. Kozick · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1996
New recursive VLSI architectures for arbitrary length discrete cosine transform (DCT) and inverse DCT (IDCT) are presented. Compared with previous methods, the proposed approach saves N-1 adders but requires one additional delay element for the DCT implementation, and saves (N/2) multipliers for the IDCT. The reduction in elements results from identifying common computations in the processing that generates the transform components.