用AES算法对一段视频进行加密 用软件分别提取加密前视频和加密后视频的PSI信息.-AES algorithm to encrypt a video PSI information were extracted from the video after the pre-encrypted video and encryption software.

快速傅里叶算法源代码，通过此算法可以快速提取某一信号的工频以及各次谐波-Fast Fourier algorithm source code, by this algorithm can quickly extract a signal frequency and each harmonic