改程序能将从音频文件中提取到的特征，分别画在8个频段的幅度-时间图上-The magnitude of change program can extract audio files from the features were painted in eight bands- time graph

语音信号的数字水印技术，比较全，可以完成音频文件的水印嵌入和提取-Digital watermarking technology based on matlab program

本文档包含了对视频分类的方法论文，先提取视频中音频信息和图像信息，然后进行拼接并使用PCA进行降维处理，最后使用高斯联合模型进行学习和分类-This document contains papers on the video classification method, first extract the video audio information and image information, and then stitching using PCA dimension reduction,