摘要
提出了一种新的基于离散小波变换和复倒谱的音频水印算法。将音频信号进行3级小波分解,在第3级上对小波系数加回声,根据不同的水印值选择不同的回声延迟,然后重构音频信号。检测时采用复倒谱变换,实现了水印的盲检测。实验表明,该算法具有很好的透明性和鲁棒性,能抵抗重采样,低通滤波等常见攻击和抖动,随机剪切等同步攻击。
This paper proposes a new algorithm of digital audio watermarking based on wavelet transform and complex cepstrum transform. The audio signal is decomposed to 3 levels in wavelet domain, and the echo is added into the wavelet coefficients at the third level delay is dependent on the watermarking bit. The watermarked audio signal is reconstructed according to the updated wavelet coefficients. The detection of watermark is a blind detection based on complex cepstrum analysis. The results show that the algorithm is transparent and robust against common attacks such as resampling, low-pass filtering and synchronization attacks such as jitter, random clipping and so on.
出处
《信息技术》
2008年第4期35-38,41,共5页
Information Technology
