Digital audio watermarking algorithm in copyright protection of music works

The Internet and digital technology have impacted all traditional content industries, and the music industry is naturally inevitable. Therefore, research on the Internet, music industry, and digital music copyright has become the focus of academic circles in various countries today. The purpose of this paper is to study the application of copyright protection of musical works based on digital audio watermarking algorithm. Firstly, the theoretical basis of digital music copyright and discrete wavelet transform is expounded. The security of the audio watermarking system is improved by using the pure sequence modulation; the watermark is embedded in the double transform domain according to the energy gathering effect of the discrete cosine transform, and finally the blind extraction of the watermark is realized. Finally, the two algorithms are compared and discussed. The experimental results show that, under the same attack conditions, the normalized correlation coefficient between the original watermark and the extracted watermark of the watermarking algorithm based on pure modulation and double transform domain is larger. The advantages of the watermarking algorithm based on mixed pure modulation and double transform domain are analyzed, which makes the application of wavelet transform coding in music copyright information more practical and extensive.