Audio Watermarking Scheme Based on Singular Spectrum Analysis and Psychoacoustic Model with Self-Synchronization

Table 8

Comparison of the computational times for determining the parameters of an host signal when the automatic parameterization is based on the differential evolution [29] and when it is based on the psychoacoustic model. The simulations were operated on the Fujitsu CX250 Cluster (JAIST parallel computers), where each node is equipped with Two Intel Xeon E5-2680v2 2.80 GHz (10 cores each) and 64 GB memory.

	Function	Computational time of the function	Search space/No. of operations	Approximated total computational time
Differential Evolution	Cost function evalution	3 minutes 44 seconds	31815 possible vectors	13 hours 9 minutes
Psychoacoustic Model	SMR calculation	0.36 seconds	717 times	4.3 minutes