Slantlet transform based digital audio watermarking for copyright protection of audio content

Abstract

Digital audio watermarking (DAW) serves an important role in the protection of copyrights of digital audio content. Many DAW schemes are available in the literature; achieving a balance among the imperceptibility, robustness and payload is always substantial. For this, a blind DAW based on Slantlet Transform (ST) is proposed in this paper. Pre-processed watermark is embedded in transformed audio coefficients. The proposed (ST DAW) method is evaluated on four classes of audio signals viz., pop, rock, jazz and folk country. Experimentation is carried out to validate its performance in terms of imperceptibility, robustness and payload. Comparative analysis of the ST DAW method with state-of-art methods proves its superiority.