Abstracl - A well-defined Characterization of the distortions io
the watermarked audio after mp3 attack would improve channel
estimation and increase detection robustness. In previous work in
the field of watermarking, noise introduced by attacks was
usually modeled as Additive White Gaussian Noise (AWGN).
Spectrum analysis shored that a more appropriate channel
model, in the presence of mp3 coding, Is the frequency-selective
fading model, as it describes more precisely the distortion that
appears in audio spectrum Simulations confirmed that BER
curves derived from our model were far closer to the
experimentally derived ones, than the BER curves derived from
AWGN channel model.