一种抗裁剪的半脆弱音频水印算法  

A Semi-fragile Audio Watermarking Against Shearing

作　　者：赵红[1] 沈东升[1] 朱元辉[1] 

机构地区：[1]漳州师范学院计算机科学与工程系

出　　处：《自动化学报》2008年第6期647-651,共5页Acta Automatica Sinica

基　　金：福建省自然科学基金(2007J0194);福建省教育厅科技项目(JA06020，JA07159)资助~~

摘　　要：半脆弱水印不但可以容忍一定程度的常规信号处理操作,而且可以检测出对多媒体数据的恶意篡改并定位篡改区域.本文提出一种抗裁剪的半脆弱音频水印算法,具有以下特点:1)充分利用多级置乱技术准确定位篡改区域,最大限度改善被篡改后水印的视觉效果;2)在篡改定位过程中,无需原始水印参与;3)利用水印的归一化相关系数,可进行完整性认证并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.Semi-fragile watermarking can tolerate general signal processing, detect any spiteful tamper on marked multimedia data, and locate spatial regions within an altered image. A semi-fragile audio watermarking against shearing is proposed in this paper. The features of the proposed algorithm are as follows： 1） Full advantage of multilevel scrambling is taken to locate tampered region; 2） The algorithm can locate tampered regions without the help from the original watermark; 3） By using the normalized cross-correlation, 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.

关 键 词：半脆弱水印 数字水印 裁剪攻击 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]