NON-RECURSIVE COMPUTATION OF 8 x 8 2D DCT FOR HIGH ACCURACY AND LOW AREA

作者：Sharma Vijay K^*; Mahapatra K K; Pati Umesh C

来源：Journal of Circuits, Systems, and Computers, 2014, 23(10): 1450143.

DOI：10.1142/S0218126614501436

• DCT
• non-recursive architecture
• direct computation of 2D DCT
• low cost design

This paper presents non-recursive computation equation for 8 x 8 two-dimensional (2D) discrete cosine transform (DCT) along with novel VLSI architecture for direct computation of DCT without transposition memory. All intermediate operations are performed in non-fraction format. Being non-recursive and all intermediate calculations free of fractions, the proposed architecture has excellent accuracy in terms of peak signal-to-noise ratio (PSNR). The architecture is implemented in 0.18-mu m CMOS standard cell technology library and prototyped in Field programmable gate array (FPGA) technology for the silicon validation. Implementation result shows that it has low power consumption and low area as compared to the available architectures of 2D DCT. To further increase the accuracy of computations, hardware overhead is very less as only one register and a multiplier bit-widths need to be changed.

• 出版日期2014-12