一种基于采样点倒置的音频信息隐藏方法  

Audio information hiding method based on samples dots inversion

作　　者：王俊杰[1] 莫倩[2] 梅东霞[3] 

机构地区：[1]北京工商大学网络中心,北京100048 [2]北京工商大学计算机与信息工程学院,北京100048 [3]北京市供销学校,北京100076

出　　处：《计算机应用研究》2009年第8期3031-3032,3035,共3页Application Research of Computers

基　　金：北京市优秀人才计划基金资助项目(20071D0500300136)

摘　　要：提出了一种将秘密语音隐藏到载体语音的新方法,并引入Logistic混沌映射,利用混沌序列对秘密语音信息进行处理。算法根据人耳对音频倒置不敏感和音频幅度值为正的采样点在总采样点中所占的比例比较稳定的特点,通过倒置的方法调整该比例的大小嵌入秘密信息。实验表明,含有秘密信息的混合语音不仅具有良好的不可感知性,而且对诸如噪声、低通滤波、重采样等攻击具有良好的鲁棒性。This paper proposed a kind of new approach of hiding speech into the audio carrier. Utilized Logistic chaotic map as chaotic sequence to process the secure speech. Based on the features that audio sample dots inversion had little influence on the human hearing and that the percentage of the positive audio sample dots in a period of time was robust against some audio attacks, embedded the secret information to the audio by adjusting the percentage of the positive audio sample dots. Realized the adjustment by inversing audio sample dots. Experiment results show the speech which is embedded with secret information has good imperceptibility, and the algorithm is strongly robust to many attacks, such as noise adding, low-pass filtering, resampiing and so on.

关 键 词：采样点倒置 语音保密通信 信息隐藏 混沌序列 盲提取 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]