A cost-effective 8x8 2-D IDCT core processor with folded architecture

A dedicated cost-effective core processor of the 8x8 two-dimensional (2-D) inverse discrete transform (IDCT) architecture based on the direct realization approach is proposed. The folding scheme is developed to obtain a low gate-count and high throughput. The experimental result shows that the chip's throughput is one pixel per clock cycle with a structure of 78K transistors, which reveals that the low cost on VLSI implementation is more attractive than most of previously reported chips. With 0.6 mu m CMOS, double metal technology, the chip is a standard-cell implementation and requires a core size of 4.4x2.8 mm(2), and is able to operate at a clock rate of more than 100 MHz.