Optimized Architecture Using a Novel Subexpression Elimination on Loeffler Algorithm for DCT-Based Image Compression

<table>Decoded images after joint optimization. (a) (Original), (b) (quantization zone = 4, bpp = 2.87, PSNR = 33.24 dB), (c) (quantization zone = 3, bpp = 2.0, PSNR = 30.26 dB), (d) (quantization zone = 2, bpp =1.26, PSNR = 28.23 dB), and (e) (quantization zone = 1, bpp=0.64, PSNR = 25.38 dB).</table>

VLSI Design

fig9

Figure 9

Figure 9: Optimized Architecture Using a Novel Subexpression Elimination on Loeffler Algorithm for DCT-Based Image Compression 