Improving bitrate in detail coefficient based audio watermarking using wavelet transformation

Abstract

With the development in communication technology over the past few decade, the usage of multimedia contents have increased progressively. Multimedia data protection has become a very important issue which needs to be addressed at the earliest. In this paper we have proposed a multimedia data protection technique for audio files. There exists various audio watermarking techniques in the literature. In this paper we propose a wavelet based watermarking technique where embedding is performed on the third level detail wavelet coefficients. The robustness of the scheme is found to be at an acceptable level with respect to some of the existing techniques in wavelet domain. The proposed method is essentially an improvement of the works reported in [1], [2], where the bit rates of the watermark data are enhanced with modest degradation in robustness. Subjective tests have been performed to evaluate the performance of the proposed method.