近年来，随着计算机、网络以及图像处理、传输技术的飞速发展，视频监控技术也有了长足的发展。
现在视频监控已经广泛应用到各个领域，一些家庭也开始安装监控设备。
视频监控设备一般由以下三部分组成：
Ⅰ.前端部分：主要由摄像机、镜头、云台、防护罩、支架、解码器等组成。
Ⅱ.传输部分;使用电缆、电线采取架空、地埋或沿墙敷设等方式传输视频、音频或控制信号等。
Ⅲ.终端部分：主要由画面分割器、监视器、控制设备、录像存储设备等。
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In recent years, with the rapid development of computer, network, image processing and transmission technology, video surveillance technology has also made great progress.
Now video surveillance has been widely used in various fields, and some families have begun to install surveillance equipment.
Video surveillance equipment generally consists of the following three parts:
I. Front-end part: mainly composed of camera, lens, platform, protective cover, bracket, decoder and so on.
II. Transmission part: Video, audio or control signals are transmitted by overhead, buried or laying along the wall with cables and wires.
III. Terminal part: mainly by screen divider, monitor, control equipment, video storage equipment, etc.
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