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.