Semi-fragile Audio Watermarking for Content Authentication
A semi-fragile audio watermarking based on scrambling is proposed in this paper. The features of the proposed algorithm are as follows: (1) The scrambling algorithm dispels the pixel space relationship of the binary watermark image and makes the pixels distribution uniformity. We take full advantage of unusual proportion to locate tampered region. (2) The algorithm can locate tampered regions without the help from the original watermark. (3) The proposed scheme can not only authenticate the integrity of the audio signal but also evaluate the temper degree. The experimental results show that the proposed algorithm has the advantages such as simple computation complexity, good robustness against shearing attack, and accurate location for tamper.