基于逼近信号特征抗MP3攻击的音频零水印  

Audio Zero Watermark Based on Feature of Approximation Signal for Avoiding MP3 Attack

作　　者：吴翔[1] 杨晓元[1,2] 张敏情[1] 周鸿飞[1] 

机构地区：[1]武警工程学院电子技术系网络与信息安全武警部队重点实验室,西安710086 [2]西安电子科技大学综合业务网国家重点实验室,西安710071

出　　处：《计算机工程》2009年第7期147-149,共3页Computer Engineering

基　　金：国家自然科学基金资助项目(60573032);国家部委基金资助项目

摘　　要：提出一种基于逼近信号统计特征和线性伸缩恢复技术的音频数字零水印算法。对原始水印采用重复码进行纠错编码,将密钥通过伪随机序列发生器产生与重复编码等长的PN序列P,用P对编码后的水印进行调制以提高水印检测的正确率。检测时采用线性伸缩恢复技术来消除时间轴上线性伸缩带来的影响,并实现了盲检测。实验结果证明,该算法对于各种攻击尤其对剪切和MP3攻击具有较好的鲁棒性。This paper presents an audio zero-digital watermark algorithm based on statistical feature of approximation signal and the technology of restoration of the linear scaling. The original watermark is error corrected coded with repetition code. In order to enhance the correct probability of detecting, the recoded watermark is modulated with PN sequence P which is produced by the key through Pseudo-random sequences generator, with the same length of the recoded code, During the process of detecting, the technology of restoration of the linear scaling is used to eliminate the influence brought by linear scaling on time axis, and a blind detecting is realized. Experiment confirms the expected high robustness to many kinds of attacks especially to cutting-attack and MP3-attack.

关 键 词：音频数字水印 零水印 纠错码 统计特征 线性伸缩恢复 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]