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

Table 3

Statistics of X(2) calculation.

Components/methods	Multiplier based	CSD	CSD-CSE
Adders/subtractors	11	23	16
Registers	125	188	119
MULT18x18SIOs	4	0	0
Equivalent no of LUT	305	221	200
Latency	3𝑇A+𝑇M	6𝑇A	4𝑇A
Maximum frequency^1	143.451	121.734	165.888

¹Maximum frequency is measured in MHz.