摘要
通过研究语音信号分形维数的特点,提出一种在语音信号小波变换低频系数的DCT域实现信息隐藏的方法,该方法首先对原始语音进行一级小波分解,计算高频系数的分形维数,在对应帧的低频系数中嵌入秘密信息。秘密信息的嵌入位置和个数利用小波变换高频系数的分形维数决定,嵌入和提取采用查量化表的方法。仿真结果表明,该算法具有较好的鲁棒性和嵌入效率。
In this paper,the features of fractal dimension of digital voice signal waveforms are analyzed and a method of speech information hiding in the DCT domain of wavelet is proposed. The position and number of information to be embedded are decided based on the fractal dimension of high frequency coefficients. Embedding and extracting process are accomplished by checking quantitative table. The simulation results show that the methods of this article can achieve satisfactory performances.
出处
《现代电子技术》
2006年第23期48-50,共3页
Modern Electronics Technique
关键词
分形维数
小波
DCT
信息隐藏
fractal dimension
wavelet
DCT
information hiding
