抗随机几何失真攻击的音频水印方案  

Audio Watermarking Scheme Against Random Geometric Distortion Attacks

作　　者：周振宇[1] 张新鹏[1] 王朔中[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《中国图象图形学报》2005年第11期1466-1470,共5页Journal of Image and Graphics

基　　金：国家自然科学基金项目(60372090);上海市科委基础研究重点项目(04JC14037);上海市教委青年基金项目(04AC93)

摘　　要：随机几何失真攻击是指在数字音频中恶意地插入跳跃,或通过重采样等手段使相位等特性发生随机抖动,从而对音频数字水印构成严重威胁的行为。为防止这种攻击提出了一种利用音频信号采样点之间的相关性,同时根据信号局部特征生成水印信号并进行自同步嵌入的新方案。实验表明,该方案不仅对一般信号处理具有稳健性,也能够很好地抵御随机几何失真攻击。Geometric distortion is a simple and effective attack to digital audio watermarking. This paper proposes a novel watermarking scheme, in which the correlation between samples of audio signal is used and watermark signal derived from the local characteristic of host signal is embedded self-synchronously. Simulation results show the proposed scheme, with robustness enough against general signal processing, can effectively resist geometric distortion attacks.

关 键 词：数字水印 音频信号 随机几何失真 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]