Power-optimized log-based image processing system

EURASIP Journal on Image and Video Processing

Table 3 Output bit error rate computation

Number of output bits	Average bit change error (for 2¹⁵test sets)
	Wallace tree multiplier	Logarithm based multiplier
		Logarithm word size in bits
		6 bits	9 bits	12 bits	15 bits	18 bits	21 bits
22	12.56	18.56	15.78	14.08	9.58	3.56	1.89
20	11.87	16.59	13.86	11.18	7.38	1.95	0.76
18	11.85	13.48	11.85	9.87	3.85	0.78	0.54
16	11.34	10.56	10.03	7.65	0.96	0.53	0.02
15	10.93	10.06	9.53	4.86	0.08	0.12	0.0085
13	10.58	8.85	7.96	2.95	0.03	0.0085	0.0053
11	10.87	7.32	4.58	0.08	0.01	0.0031	0.0017