一种基于PCA的数字音频信息隐秘传输方法

A Secret Transmission Method Based on PCA for Digital Audio

描述了一种基于主成分变换(PCA)的数字音频信息隐密传输方法。该方法以彩色图像为寄主图像，对其进行PCA分解，将经压缩、加密、纠错编码后的数字音频码流，隐藏在对彩色图像质量影响最小的PCA变换数据中，生成藏音图像进而实现音频信息的隐秘传输。PC机上进行模拟实验的结果表明，该方法在保证图像质量条件下，有较高的嵌入率、较好的可靠性与隐蔽性。

This paper describes a new method based on PCA to transmit hidden digital audio, where a color image is used as the host image and analyzes how to get its principal components. After been compressed, encrypted and coded, the digital audio is embedded in the parts of the principal components whose change will cause little change to the quality of the image. Thus an image with the audio information hidden in it can be composed, and transmitted in the Internet. In this way, the digital audio can be transmitted secretly.The authors have simulated this method in PC. The experiments show that using this method, the transmission ratio of the digital audio and its security can be considerably high under the condition of keeping image quality.