基于超混沌加密的半脆弱音频水印算法  

SEMI-FRAGILE AUDIO WATERMARKING ALGORITHM BASED ON HYPER-CHAOS ENCRYPTION

作　　者：杨晋霞[1] 鞠杰[1] 邵峰[2] 

机构地区：[1]郑州科技学院信息工程学院,河南郑州450064 [2]郑州科技学院电气工程学院,河南郑州450064

出　　处：《计算机应用与软件》2014年第11期295-298,333,共5页Computer Applications and Software

基　　金：河南省教育厅科学技术研究重点项目(12B510031)

摘　　要：提出一个基于超混沌加密的半脆弱音频水印方案。该方案利用超混沌序列对图像水印进行加密,不仅能消除水印图像相邻像素的相关性,而且真正实现了水印图像加密,安全性更高。水印嵌入采用均值量化将加密图像行嵌入到载体音频段的小波包低频分解系数中,建立加密图像行和音频段间的对应关系;检测时通过篡改评估函数对篡改程度度量,实现了音频作品的内容完整性认证。实验结果表明,该方案对常规操作有很强的鲁棒性,对剪切、替换等恶意处理篡改定位精确。A semi-fragile audio watermarking scheme based on hyper-chaos encryption is proposed.This algorithm has following features：1） eliminates the pertinence of adjacent pixels to watermarking image and truly realises the watermarking image encryption with higher safety by using hyper-chaos sequence to encrypt image watermarks; 2） uses mean quantification in watermark embedding,that is to embed the encrypted image line into wavelet packet low frequency coefficients of carrier＇s audio section to establish the relationship between them; 3）measures the tamper degree in detection process with tampering assessment parameters,and accomplishes the authentication on content integrity of the audio works.Experimental results show,the algorithm has good robustness against conventional operation and accurate localisation on tamper and malicious attacks such as shearing and replacement attacks.

关 键 词：混沌序列 超混沌加密 半脆弱水印 篡改检测 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]