IP versus Analog
What should I take: Digital IP or Analog CCTV?
IP cameras can generate better image quality, are easy to install and always expandable. However analog cameras are more efficient, have lower price and are reliable. Both types of cameras have their pros and cons, it's all about the right camera in the right place.
For a good understanding and therefore a good choice for a security camera, a brief explanation of the difference between analog and IP cameras:
IP cameras are excellent in getting high-definition megapixel images, however generally less sensitive to light (meaning less image quality in low light). If the configuration is properly handled, the images are good. This is highly dependent on the cameras location and the experience of the installer. Easy to connect to an existing network. Keep in mind the distance between the switch and the camera, which is limited (max 100m).
IP cameras can almost be unlimited in an existing network. One cable for power, video and data transmission. Remember the fact that the normal cabling has limited wattage (normally up to 25W max). For example, a PTZ camera (a camera that lets you 'pan-tilt-zoom') uses 70W. The images of an IP camera are compressed before they are shown on screen and unpacked for immediate display, this can cause a delay.
Analog cameras comply perfectly with different lighting conditions and can move (PTZ) perfectly. Analog cameras have a limited number of TVL (TV lines). For monitoring purposes an analog resolution of 1.3 megapixel is more than enough. The DVR attached to the system delivers the ultimate video quality.
Analog cameras are excellent for live image viewing. There is some discussion about the maximum cable length among installers. The fact is that analog security cameras can be connected with great distance. However, the exact cable length depends on sources of interference around the cable and the quality of the connectors.
Difference IP and Analog
The difference between IP and analog lies mainly in the video-transmission of the signal. IP camera combines the capabilities of a camera with the functionality of a PC, requires no direct PC connection and can be placed anywhere in the network. Like any PC within the network, an IP camera is a network application with its own IP address, whether or not connected wireless to this network and therefore it needs maintenance.
IP cameras can generate a higher quality image. Analog camera digitizes the images also but before it can be converted into a video, the image must be converted into an analog signal so that it can be received by a video recorder or monitor. Unlike IP cameras, analog cameras have no built-in webservers or encoders and thus require less maintenance. These functions are in the DVR (digital video recording) recorder.
Our advise: Analog or IP CCTV ?
IP is the future and the technology is overtaking analog quickly. The maximum efficiency of IP technology can be achieved when both the installer and end user well aware of the capabilities of the IP camera system.
The time for IP has come...!