基于LWT域的矩阵编码音频隐写算法

摘要

To research the hidden and embedded quantity of the audio watermark. Audio watermark algorithm based on elevate wavelet domain transform is proposed which applied the theory of matrix coding to realize the secret data embedded. The algorithm made lifting wavelet transform with initiation audio frame, using masking properties of human auditory system to find the right embedded frame, extraction of the host signal enhance wavelet coefficients of the LSB, and using matrix coding realize secret data embedded. The experiment shows that because the algorithm using human auditory masking, therefore, this algorithm have a more efficient, safe, hidden properties than the average wavelet domain LSB algorithm. And the algorithm has a good property of robust and imperceptible.%以音频信号作为载体,对隐蔽性与嵌入量进行了研究,提出一种提升小波域的信息隐藏算法,算法利用矩阵编码来实现秘密数据的嵌入.该算法对载体音频帧作提升小波变换,采用人类听觉系统(HAS)的掩蔽特性来寻找合适的嵌入帧,提取宿主信号提升小波分解系数的LSB,矩阵编码实现秘密数据的嵌入.实验结果表明,该算法由于使用了人类听觉掩蔽特性,因此比普通小波域LSB算法具有更加高效、安全,隐蔽的性能,使得鲁棒性与不可感知性得到折中.