A Novel Echo Detection Scheme based on Autocorrelation of Power Cepstrum

Echo hiding is one of the prevailing techniques in audio watermarking. Currently available echo hiding technique still has some drawbacks, the detection ratio is relatively low, the robustness against many common signal processing operations of amplitude amplifying, Mp3 compression, re-sampling, filtering, time-delay and noise addition is not satisfactory. To enhance the detection ratio, we propose using the autocorrelation of power cepstrum instead of the original auto-cepstrum in that the former is more effective in the presence of attacks. Computer experiments are performed to test the validity of the proposed scheme, the results of which show the proposed detection scheme is superior to the original one especially in the presence of attacks.