An Audio Blind Watermarking Scheme Based on DWT-SVD

In order to protect the digital audio and video products copyright in the network, an improved audio blind watermarking algorithm scheme based on discrete wavelet transform (DWT) and singular value decomposition (SVD) is proposed. In the algorithm, an original audio is split as blocks and each block is decomposed on discrete wavelet transform for two degree, then first quarter audio approximate sub-band coefficients are decomposed on SVD transform, obtain a diagonal matrix. The watermarking information is embedded into the diagonal matrix. Experiments display that the transparency of the proposed algorithm is better, and robustness is strong against the popular audio signal attack such as resampling, low-pass filter, requantization, Gaussian white noise, MP3 compression and popular audio signal attack method has stronger robustness, average normalized correlation coefficient NC > 0.950, average BER<0.048.