The internal electrical components of all types of cameras are more or less the same. In any camera, a digital image sensor is used to take pictures. This sensor consists of an array photosites, known as pixels by many people, where photodiodes are found. Photo diodes are semiconductor devices that respond well to light, converting light that lights them into electrical charges. The intensity of the electric charge in a photodiode depends on the brightness of the light that hits the photodiode. In this case, the brighter the light, the higher the intensity. When the photodiode stops being exposed to light, the accumulated electrical charge is transferred and converted to an analog voltage signal. However, handling the voltage signal by the camera depends on the type of camera. At present, there are two common types of CCTV cameras on the market, IP CCTV cameras and analog CCTV cameras.
Difference between IP and analog cameras
Both IP and analog cameras work the same way in terms of capturing images but differ in the way they send signal. Conventional analog cameras provide analog voltage signals to the DVR that are connected via coax or UTC cable. The DVR then converts these analog voltage signals into digital signals in binary form, compressing files and storing them on the hard drive on or attached to the DVR. To view video files, the monitor must be connected to the DVR. However, the DVR can also be connected to the internet so that video files can be viewed remotely. On the other hand, IP CCTV cameras convert analog voltage signals directly to digital signals and transmit data via an Ethernet cable to a centralized unit, known as a network video recorder, which is responsible for video monitoring, storage and event management. However, data can also be sent wirelessly via a radio transmitter or TCP / IP protocol.
Pros and cons of each
Analog CCTV cameras tend to be cheaper. They are easier to set up and understand, and installation of this type of camera is relatively easier. However, because this camera must be connected to the power supply and DVR, more cables are needed. In addition, coax cable tends to be more expensive. Analog cameras provide lower quality images. On the other hand, IP cameras are able to provide high quality images. This system does not require a lot of wiring because this camera only requires the use of one particular type of cable that is capable of sending data and providing power supply. However, installation of this type of CCTV system requires a lot of costs and installation is more complicated.
Choosing the right CCTV system for the home may not be that easy. However, the best option will depend on your needs. If you are looking for a portable CCTV camera to monitor your pet, IP cameras will probably be the only type that is compatible and considered best for pet owners. However, if you have a tight budget and don't need a portable CCTV camera, an analog CCTV camera will be the right choice.