Lee, Y.-P.Y.-P.LeeChen, T.-H.T.-H.ChenLIANG-GEE CHENChen, M.-J.M.-J.ChenKu, C.-W.C.-W.Ku2018-09-102018-09-10199710518215https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031168228&doi=10.1109%2f76.585925&partnerID=40&md5=f821fab8252cc4a7213549bbd3ff7826http://scholars.lib.ntu.edu.tw/handle/123456789/329304In this paper, we develop a novel 8 × 8 two-dimensional (2-D) discrete cosine transform/inverse discrete cosine transform (DCT/IDCT) architecture based on the direct 2-D approach and the rotation technique. The computational complexity is reduced by taking advantage of the special attribute of complex number. Both the parallel and the folded architectures are proposed. Unlike other approaches, the proposed architecture is regular and economically allowable for VLSI implementation. Compared to the row-column method, less internal wordlength is needed in order to meet the error requirement of IDCT, and the throughput of the proposed architecture can achieve two times that of the row-column method with 30% hardware increased. © 1997 IEEE.DCT/IDCT; Direct 2-D approach; Finite wordlength analysisComputational complexity; Computer architecture; Computer hardware; Cost effectiveness; Error analysis; Mathematical transformations; VLSI circuits; Finite wordlength analysis; Inverse discrete cosine transform (IDCT); Image compressionjournal article10.1109/76.5859252-s2.0-0031168228