Robust and Blind Audio Watermarking Scheme Based on Genetic Algorithm in Dual Transform Domain

Table 2

Attack types.

Item	Attack type	Description
A	Additive noise	Add Gaussian noise with 35 dB on the carried audio
B	Additive noise	Add Gaussian noise with 30 dB on the carried audio
C	Additive noise	Add Gaussian noise with 20 dB on the carried audio
D	Amplitude scaling	Scale the amplitude of the carried audio to 0.8 times
E	Amplitude scaling	Scale the amplitude of the carried audio to 1.2 times
F	Low-pass filtering	Apply the low-pass filter with a cutoff frequency of 4 kHz
G	Low-pass filtering	Apply the low-pass filter with a cutoff frequency of 8 kHz
H	MP3 compression	Apply MP3 compression with 64 kbps
I	MP3 compression	Apply MP3 compression with 128 kbps
J	Echo jamming	Add an echo with 10 ms to the carried audio
K	Echo jamming	Add an echo with 50 ms to the carried audio
L	Resampling	Modify the sampling rate with 44.1 kHz–22.05 kHz–44.1 kHz
M	Requantizing	Modify the quantizing bit with 16 bits-8 bits-16 bits per sample