Anti-da / Ad Attack Audio Watermarking Algorithm

In recent years, with the development of digital networks and multimedia processing technology, more and more digital audio media are available. It is beneficial to our daily life but brings the problem of ownership techniques. Digital water-marking technology, considered as a potential solution, has brought the cause to the attention of the world and development. However, in many applications of audio watermarking, the watermark is required to survive well in analog environment, which involve the D/A and A/D conversions. The robustness of audio watermark against the DA/AD processing has not drawn sufficient attention yet. The paper main analyze the audio watermarking algorithm against the DA/AD conversions. The main content includes:(1) Through the collection of material, we conclude the basic theory about the D/A and A/D conversions, and analyze the main degradations on the audio watermark including the linear temporal scaling, wave magnitude distortion and the additional noise corruption. Then we propose the model of degradation;(2) According the model, the paper proposes a strategy using the relative energy relationships among different groups of the wavelet coefficients in low-frequency to resist the DA/AD conversions based on linear interpolation and synchronization codes. The experimental works show that the algorithm is robust to the DA/AD conversions;(3) Based on the zero-watermark scheme, the paper proposes a algorithm by using the statistical character of the absolute value of the mean of the wavelet coefficients in low-frequency. It solve the robust and the imperceptible;...