A video surveillance system / CCTV is composed of a system of cameras, monitors/display units, and recorders. Cameras may be either analog or digital with a host of possible design features which will be discussed momentarily.
These systems can be applied to both interior and exterior areas of a building or property. They can operate 24/7, can be designed to only record in response to movement, or set to record during specific times of the day.
Analog: analog cameras are traditional cameras that usually only offer lower resolution and require coaxial cable hook-ups for each camera to the DVR and separate wired connections for power. Additionally, to ensure better quality footage, the cameras must be located near the DVR. Their range of vision is typically smaller than IP/digital cameras,
IP/Digital: Internet Protocol cameras are digital cameras that possess much higher resolution and clearer images than analog cameras do. They connect to an NVR through a power over ethernet (PoE) switch and only use one cable to connect to both the NVR and the power source.
Let’s start with the obvious advantages a digital system provides, compared to analog. Digital surveillance cameras not only capture and store more video than analog systems, but the quality of the video feed is far superior as well. Digital video cameras offer high-definition clarity and wider viewing angles.
First and foremost, digital video surveillance is more cost-effective than its analog counterpart. A digital system requires less physical infrastructure to operate (think fewer wires) than an analog system.