Accomplishments

Performance Evaluation of Audio Watermarking Algorithms using DWT and LFSR
- Abstract
Advancement in Internet technology has compelled encryption, copyright protection and authentication of audios, videos, images, and documents. Watermarking techniques have been widely employed in copyright protection and authentications of digital media. Digital image watermarking techniques are extensively explored and found suitable for copyright protection of images, whereas audio watermarking techniques are less studied and need extensive research due to superior hearing ability of the human beings. In this paper, we present audio watermarking technique using discrete wavelet transform (DWT) and linear feedback shift registers (LFSR). Watermark signal is obtained using LFSR technique before embedding into audio signal. Dispersion of maximum power spectral density property of LFSR is explored that makes it suitable as scramblers. LFSR does not require secret key for scrambling and descrambling of watermark signal. Sequences were embedded into the DWT coefficients of the audio signal. Experimental simulations were performed to evaluate the performance of the audio watermarking technique. Audio watermarking finds applications in the area of ownership protection, tamper detection and authentication of music, military communication, voice-activated machines, and robots.