A COST-EFFECTIVE ARCHITECTURE FOR 8X8 2-DIMENSIONAL DCT IDCT USING DIRECT METHOD/

In this paper, we develop a novel 8 x 8 two-dimensional (2-D) discrete cosine transform/inverse discrete cosine transform (DCT/IDCT) archite cture based on the direct 2-D approach and the rotation technique. The computational complexity is reduced by taking advantage of the specia l attribute of complex number, Both the parallel and the folded archit ectures are proposed, Unlike other approaches, the proposed architectu re is regular and economically allowable for VLSI implementation, Comp ared to the row-column method, less internal wordlength is needed in o rder to meet the error requirement of IDCT, and the throughput of the proposed architecture can achieve two times that of the row-column met hod with 30% hardware increased.