A Novel Audio Watermarking Algorithm for Copyright Protection of Digital Audio

Digital watermark technology is now drawing attention as a new method of protecting digital content from unauthorized copying. Digital watermarking is the process of embedding sideband data within the samples of a digital audio, image, or video signal. A novel audio watermarking algorithm is used to protect against unauthorized copying of digital audio. This paper presents robust and efficient approach of audio watermarking for copyright protection. This watermarking scheme includes a psychoacoustics model to ensure that the watermarking does not affect the quality of the original sound. The Direct Sequence Spread spectrum (DSSS) technique is taken to spread the watermark bits over the entire spectrum of audio signals without the violation of psycho acoustic properties of Human Auditory System (HAS) in frequency domain. The size of watermark depends upon the size and numbers of audio file samples. After embedding the watermark, our scheme extracts copyright information without access to the original signal .The watermarking scheme is robust against common signal processing attacks and it introduces no audible distortion after watermark insertion. The watermark must be imperceptible to the intended audience of the host signal, and must withstand distortion from common signal processing operations.