Audio watermarking scheme based on lifting wavelet transform

In order to improve the efficiency and performance of audio copyright protect technology, a robust blind audio watermarking scheme is proposed based on lifting wavelet transform, discrete cosine transform (DCT) and singular value decomposition (SVD) in the paper. In the algorithm, an original audio is split into equal frames and each frame is decomposed with DCT, whose coefficients are decomposed with the lifting wavelet transform. Then a singular value matrix is obtained after decomposing the approximate sub-band coefficients with singular value decomposition. At last, the watermarking information is embedded into the singular value matrix. Experimental results verifies that the proposed watermarking algorithm equips strong robustness against several kinds of attacks such as noise addition, re-sampling, re-quantization, MP3 compression, replace and so on.