面向空气信道传播的音频信息隐写算法

面向空气信道传播的音频信息隐写算法 An Audio Steganography Algorithm Based on Air-Channel Transmitting 张霞 ZHANG Xia1 1 first-author 常迪 CHANG Di2 2 3 郭伟 GUO Wei2 2 3 杨婉怡 YANG Wanyi3 3 江汉大学物理与信息工程学院 江汉大学物理与信息工程学院 School Physics and Information Engineering,Jianghan University School Physics and Information Engineering,Jianghan University 武汉大学国家多媒体软件工程技术研究中心 武汉大学国家多媒体软件工程技术研究中心 National Engineering Research Center for Multimedia Software,Wuhan University National Engineering Research Center for Multimedia Software,Wuhan University 武汉大学计算机学院 武汉大学计算机学院 School of Computer,Wuhan University School of Computer,Wuhan University 基于傅立叶变换,提出了一种面向空气信道传播音频信息隐写算法.该算法选取原始音频信号傅立叶变换域中的低频系数,提取其相位角系数,并对其进行修改,将经BCH纠错编码的隐写信息嵌入,并且嵌入量较大,隐藏效果好.实验结果显示,该算法能够有效抵抗空气传播过程中的AD/DA变换攻击、空气噪声干扰攻击,以及录制后的常见信号处理攻击、约30%的重采样攻击等其他攻击,平均误码率可控制在3.5%以下,算法具有很好的鲁棒性. An audio sonic steganography algorithm was proposed based on FFT.The low-frequency coefficients in FFT domain of original audio signal were chosen.By modifying these coefficients’ phase,the hidden information was encoded with large capacity.Experimental results indicate that the proposed algorithm has a good hidden effect,and it is robust to AD/DA conversions attacks,air-channel background noise attacks in transmitting process,and after recording it is also robust to common signal processing attacks,about 30% resample attacks,etc.Moreover,the average bit error is smaller than 3.5%. 信息隐写 AD/DA变换 傅立叶变换 同步信号 steganography AD/DA conversions FFT（fast Fourier transform） synchronization signal 10.14188/j.1671-8836.2011.06.007 TN912.3 国家重大科技专项资助（2010ZX03004-003-03）;国家自然科学基金资助重点项目（60832002）;湖北省自然科学基金资助项目（2009CDB222,2010CDB08602）;湖北省教育厅科学技术研究计划指导性项目（B20114505）;教育部博士点基金项目（20090141110054）资助 2011-06-01 2021-04-01 6 57