Robust Digital Speech Watermarking For Online Speaker Recognition

Table 1

Comparison of robustness (BER %) among different watermarking techniques.

Attack	DWT-SVD	Robust DWPT-Multiplication	LWT-SVD	SVD-QIM
No attack	0	0	0	0.02
AWGN (5 dB)	0.41	0.22	0.45	0.53
LPF (4 KHz)	0.43	0.04	0.12	0.41
BPF (300 Hz–3300 Hz)	0.39	0.05	0.25	0.48
-law	0	0	0	0.08
µ-law	0	0	0	0.14
CELP9600	0.30	0.09	0.32	0.49
CELP16K	0.0817	0.11	0.41	0.42
Amplitude variation	0.49	0	0.42	0.36
Resample 8 KHz	0.51	0.03	0.50	0.54
Requantization	0	0	0	0.44
Average	0.24	0.05	0.22	0.36