一种自适应的音频信息隐藏算法

An Adaptive Audio Information Hiding Method

在前人数字水印音频隐藏技术的基础上,提出了一种基于听觉掩蔽特性的扩频信息隐藏算法。该算法充分利用了扩频系统抗干扰性能强、隐蔽性好的特点,引入了子带分割及多相离散余弦滤波器组的思想,为了补偿由于信道噪声等引起的错误,提高接收端数据的提取正确率,该算法还使用了冗余和纠错编码技术,有效地解决了传统信息隐藏算法知觉相似性差、鲁棒性差及安全性差的问题。实验结果表明这种算法是非常有效的,属盲检测算法。

Based on sufficient research to characteristics of digital watermark, in this paper, an adaptive spread spectrum information hiding method is proposed. This method bases on characteristics of auditory masking and directly makes use of spread spectrum technique. At the same time, it introduces the ideas of sub-strip division and multi-phase discrete cosine filter. To compensate channel error aroused by channel noise and amendment to original signal so as to improve validity rate of hiding, it also makes use of redundancy and error correct technique. The key problems, inferior invisibility, and robustness and security of traditional audio information hiding methods, have been solved effectively. Experiment results indicate that these techniques are very effective. This method has the characteristic of blind checking.