It may need a tremendous amount of network devices to build a complete video surveillance system, together with the complicated cabling networks that connecting all the equipment. This may cause the complexity of electromagnetic interference and affect the total performance of the system. Therefore, electromagnetic compatibility of the electronic equipment should not be negligible when the video surveillance system is applied to environments with high-voltage current, such as power plant, factory, transportation and infrastructure. EMC stands for electromagnetic compatibility. This means electromagnetic energy generated by the equipment is neither interfering to other equipments nor accept the electromagnetic energy interference of other equipment.