基于Shamir秘密共享方案和零水印的音频水印算法

提出一种基于Shamir秘密共享方案和零水印技术的数字水印算法。该算法首先将音频信号分成n段,并根据Shamir秘密共享方案将水印信息分成n份,然后对n段音频信号进行离散小波分解,将水印信息分存到相应的n段音频信号的低频系数中,然后对低频系数运用零水印技术构造鲁棒水印。实验表明,该算法中的零水印对滤波、有损压缩等常见水印攻击方式有较强的鲁棒性,能达到音频作品版权保护的目的,同时分存的水印信息不仅对音频信号的整体攻击具有较强的敏感性,可以达到内容认证的目的,而且能够抵抗剪切以及对音频文件局部的攻击,并确定被攻击的位置。

Audio watermarking algorithm based on Shamir secret sharing scheme and zero-watermark's technology

This paper presents an audio watermarking algorithm based on Shamir secret sharing scheme and zero-watermark’s technology.First,divides the digital audio signal into parts,and makes the information of digital watermarking into shares by the Shamir secret sharing scheme.Then embeds each share of the digital watermarking in the DWT low frequency coefficients of digital audio signal,the robust watermark is constructed by the DWT low frequency coefficients using zero-watermark’s technology.Experimental results show that this algorithm is robust to many operations to digital audio signal,such as filter,lossy compression and so on,and can protect the copyright of audio production.The watermark separated embedded is not only sensitive to several operations for authentication,but also can resist cut and partial attack to the audio files for fixing on the location.