【摘要】 提出一种基于置乱技术的半脆弱音频水印算法,该算法充分利用多级置乱技术消除水印信息的像素相关性,保证水印图像中每行白色像素个数所占比例相近,并可通过异常比例准确定位篡改区域;同时在篡改定位过程中,无需原始水印参与;另外,该算法不但可进行完整性认证,而且还可以给出篡改程度的度量.实验结果表明,该算法计算简单,有很好的抗裁剪性能,同时对篡改的定位也很精确.更多还原

【Abstract】 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.更多还原