一种基于混沌加密的DWT数字音频水印算法

提出一种基于混沌加密的DWT数字音频水印算法。算法从水印的安全性出发,水印信息加密过程引入混沌理论,第一次加密过程利用二维映射对水印信息进行置乱加密,再利用高维混沌系统对得到的第一次加密后的水印进行二次加密。为了提高算法鲁棒性,采用同时嵌入多个同一水印信息的方式,通过少数服从多数的原则来确定提取出的水印信息,进而增强水印信息的纠错能力,提高水印的鲁棒性。仿真实验结果及数据分析表明该算法具有较好的鲁棒性及安全性。

A Digital Audio Watermarking Algorithm Based on Chaotic Encrypting in DWT

An algorithm based on the chaos theory of digital audio watermarking algorithm is proposed. For the security of digital audio watermark,the chaos theory in the high dimensional chaos theory is applied to the watermark encryption. For the first time,we use chaotic sequence to encrypt watermark signal,and the second time,we use high dimension chaotic system to encrypt the encrypted watermark again. In order to improve the robustness of the algorithm,the algorithm was embed the same watermark information repeatedly by the way. The principle of majority was used to enhance the error correction capability of watermark information when the watermark information was extracted. Simulation results showed that the algorithm is of better robustness and security.