在红外防水相机的研制过程中，视频防扰装置在其中起着不可替代的作用.

     In the development of infrared waterproof camera, video anti-interference device is irreplaceable.

     视频反扫描程序

     Video anti-interference device

     由于红外摄像机传输方法的优点是传输结构简单，但也会遇到传输间隔不能太远的问题。红外智能球需要在电缆特性要求的范围内传输，视频同轴电缆只能同时传输一个电视信号。

     Because the transmission mode of infrared camera system is simple, and there will be an infrared smart ball whose transmission interval is not too far, the required cable characteristics are required to be in the transmission range, while the video coaxial cable and road can only transmit television signals.

     由于这种传输方式对红外防水摄像机具有很高的稳定性，系统中使用的设备简单，布线方便等优点，在实际生活中得到了广泛的应用。然而，当电缆具有高带宽和低频率时，当信号在电缆中传输时，信号的幅值和相位将与高频带有很大的不同，特别是当相位失真过大时，很难用简单的电路进行补偿。除了基带传输的低频外，还有一些仅仅受到强电、发射塔、基站、电机、变频器等干扰源的干扰。例如，红外防水相机常见的干扰源：

     This infrared waterproof camera transmission mode has the advantages of high stability, simple equipment, convenient wiring and so on, and has been widely used in real life. However, the practical use of high bandwidth and low frequency of the cable forms the transmission mode of the signal in the cable, its amplitude and phase are very different at low frequency and high frequency, especially when the phase distortion is too large, it is difficult to compensate with a simple circuit. Baseband transmission, low frequency, some very simple, by strong electricity, tower, base station, motor, frequency converter and other interference sources. For example, an infrared water camera is a common source of interference:

     1.广播干扰：

     1. Broadcast interference:

     当电缆安装在空中时，电缆本身相当于一个长天线。由于天线效应的影响，电缆内会产生相当大的广播干扰电压，电缆外表面会产生干扰电流，通过电缆的地址和接地形成环路，从而在终端负载上产生广播扰动信号的电压，从而将置乱信号混合到视频信号中。这一令人不安的信号在图片中显示密集的水平线、垂直线、斜纹等，甚至在严重时将整个视频图像吞没。

     When the cable is installed in the air, the cable itself is equivalent to a long antenna. Due to the occurrence of antenna effect, there will be large voltage interference to the transmission cable, and interference current will occur in the cable sheath. The current passes through the cable end and addressing circuit, thus the broadcast interference occurs in the terminal load voltage signal, and the interference signal is mixed with the video signal. The disturbance signal shows dense stripes, vertical lines, twill and so on in the image, and even in serious cases, even the whole video image will be swallowed up.

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