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CCTV – Analogue or IP?

The fundamental requirements of video surveillance security system are that it should provide evidential quality images, easy access to recorded data, and a capability to track a target across a specific area. Further security enhancements to a system can also include behaviour recognition systems and the ability to intelligently monitor crowd scenes.

Both Analogue and IP systems can satisfy these requirements very effectively. The table below highlights the different characteristics of an Analogue and IP system to help you decide what system is best suited for your application.

Analogue system IP system
System definition A standard solution incorporates a closed circuit recording system that has monitors, cameras and recorders directly connected to it. The amount of components on the system is limited to the amount of inputs and outputs available. Unlike an analogue system there is no limit to the amount of components allowed. Utilising an IP network enables integration with other systems including access control and intruder detection, as well as the option for remote monitoring of additional sites.
Future proof Analogue systems are considered well established, resulting in simplified monitoring and configuration. As analogue is considered a mature solution, any future development is likely to be focused around enhancements as opposed to new technology development. Due to the open technology aspect of IP compared to the closed circuit technology associated with analogue systems, IP components have the capability of greatly increased functionality and higher resolution resulting in greater picture quality.
Resolution Maximum of 625 lines. Multiple options ranging from VGA to Full HD.
Frame rate 25 frames (PAL). Multiple options.
Data delay None. Yes, depending on the bandwidth, network environment and other components utilising the same network.
Data deterioration Yes � Depending on the distance the video signal has to travel, and the type of transmission being used. (i.e. Coax, twisted pair etc) None.
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