Audio and Video Matching Zero-Watermarking Algorithm Based on NSCT

Table 2

Experimental results of audio robustness.

Attack type	Attack parameter	NC mean	PSNR mean	BER mean (%)
White Gaussian noise	20 dB	0.9191	28.8435	3.4829
	25 dB	0.9954	32.4838	0.1482
	30 dB	1	32.5631	0
Requantization	Up quantization	0.9995	31.6278	0.1473
	Down quantization	0.9962	32.0576	0.1492
Resampling	Upsampling	0.9939	31.5582	0.1495
	Downsampling	0.9879	33.5632	0.4796
Low-pass filtering	4 kHz	0.9954	32.9113	0.1489
	8 kHz	0.9938	32.9013	0.1496
MP3 compression	128 kbps	0.9917	31.4401	0.1507
	64 kbps	0.9938	31.9790	0.1495