基于量化的倒谱变换数字音频水印算法

提出了一种基于复倒谱变换的数字音频水印算法。该算法充分利用了复倒谱变换的特征,将原始音频信号分成若干帧,每帧音频实施复倒谱变换后,将系数均值按照一定的量化方法嵌入水印,水印的提取不需要原始音频信号,是一种盲水印算法;实验结果表明,嵌入的水印不仅具有很好的透明性,而且对重新采样、低通滤波、添加噪声、重新量化、有损压缩等攻击也具有很好的鲁棒性。

Digital audio watermarking algorithm based on quantizing cepstrum transform

This paper presents a blind audio watermarking algorithm based on cepstrum transform.The audio signal has been divided into several segments,then every segment has been transformed with complex cepstrum and you can get mean of complex cepstrum,and we embed watermark by quantizing mean of complex cepstrum coefficient.The watermark can be extracted without the original digital audio signal.Experimental results show that embedded watermark is imperceptibility and robust to many attacks,such as noise adding,re-sampling,low pass filtering,re-quantization and lossy compression and so on.