Robust audio watermarking scheme via QIM of correlation coefficients using LWT and QR decomposition

In order to realize the copyright protection of audio information and improve the security of the watermarking algorithm, a secure robust audio watermarking algorithm via quantization of the random correlation coefficients in lifting wavelet transform domain and QR decomposition is proposed Firstly, lifting wavelet transform is performed on the audio data, the approximate components are mapped into matrix, and QR decomposition is done to the blocks of the matrix. The watermark is embedded by quantization the correlation coefficient of R matrix vector and a random vector using quantization index modulation. Simulation results show that the algorithm not only have good imperceptibility and high embedding capacity, but also strong robustness against common signal processing, such as noise addition, resampling, low-pass filtering, re-quantization, MP3 compression and so on.