A robust audio watermarking algorithm against DA/AD conversions and desynchronization attacks

A novel audio watermarking algorithm based on the audio amplitude inversion is proposed. Based on extensive experiments, we found that the similarity of the original audiopsilas waveform and the attacked audiopsilas waveform was high when the frame length was appropriate. And it had little influence on the human hearing after inversing the audio amplitude in a period of time. Based on those features, at first we divided the host audio into several frames, then inversed the audio amplitude to embed watermark. We extracted the watermark by judging the polarity of the similarity, and the resynchronization was designed to increase the correct rate. Experimental results show that the watermarked audio has good imperceptibility and is robust against different kinds of attacks, such as noise adding, low-pass filtering, resampling, requantization, echo, MP3 compression, especially it can resist the attacks of the DA/AD conversions and desynchronization.