The encryption method is n ' t considered the characteristic of the video signal , regard the image data file as the general binary scale data file to encrypt 一是用纯密码算法加密技术，将图像数据文件当作一般的二进制数据文件进行加密。
3.
Software part want function that realize : through interrupt service routine gather and come out regularly ecg signal , store among computer in the form of the binary scale ; data compress programme should realize to ecg signal pretreatment and compress of signal , narrow the storing amount of the data , save the space ; case information management system realize patient information and heart telecommunication file of interest , keep and in the data base , can show the ecg signal wave form at the screen of the computer directly data that gather . and has offered and type and report the single function 软件部分所要实现的功能为：通过中断服务程序把心电信号定时采集出来，以二进制的形式存储在计算机中；数据压缩程序应实现对心电信号的预处理和压缩，缩小数据存储量，节省空间；病例信息管理系统实现患者个人信息和心电信息的存档，把采集的数据保存作数据库中，能够将心电波形直接显示在计算机屏幕上，并提供打印报告单的功能。
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