What is CCTV ?

Security cameras are used to capture light stream through the lens. After years of development, surveillance cameras can provide higher resolution images and clearer audio.

Discreet CCTV cameras beneficial because criminals will be less likely to spot them and therefore, they are less likely to be damaged in the process.

Even in total darkness at night, security cameras with color night vision technologies can also see clear images in true color.

the number of CCTV cameras scattered throughout cities and commercial establishments is scary.

One of the best 24 hour surveillance cameras around providing airports, seaports, boards and many other critical infrastructures with quality images, no matter what time of day it is.

most CCTV cameras equipped with motion detection sensors can trigger alarms when there are human movements. They are a dependable safeguard against burglary and theft.

Over time, analog CCTV systems have evolved into digital recorders known as DVRs. The acronym is original from the name Digital Video Recorder.

capturing videos or audios, CCTV surveillance cameras transmit signals to the security camera recorders for documenting and replaying key moments. DVRs or NVRs are often employed in the CCTV camera system, realizing 24/7 reliable recording.

When using a DVR to record the footage from security cameras, there is a conversion of the analog to digital signals before recording and transmission over the local network or Internet.

Besides, some high-end closed-circuit television cameras (the full form for CCTV cameras), also come with a micro SD card (slot) for local storage of motion events when they are detected.

Infrared cameras have small LEDs surrounding the lens to help pick up moving figures in pitch black. Thermal image cameras can see over long distances, up to 300 metres away!

When doing this conversion from analog to digital, the CCTV system can no longer be considered purely analog, so in fact, it is a hybrid system that uses analog security cameras but with a recorder that has digital (DVR) technology.

Video clips recorded in the DVRs/NVRs or SD cards can be replayed anytime in your mobile phone, computer or TV monitor, even you are far away.

With the ability to zoom in and out without forfeiting its focus. Varifocal cameras allow you to adjust the focal length, the angle and increase or decrease the zoom – ideal for obtaining footage in a square room where you would normally experience a ‘dead zone’ with any alternative, fixed lense camera.

In addition to the evolution of analog CCTV systems to the hybrid version that uses DVRs for digital recording, new technologies have also emerged from analog security cameras that can provide higher resolution and thus better image quality.

You can choose one kind of CCTV cameras that adapts to a certain scenario. For example, in the places without the router network such as in the RVs, boats and vacation home or even in the wild, cellular CCTV cameras, like Reolink Go, are often employed.

CCTV systems continued to evolve, and so the world's first IP security camera was created to allow the video transmission over long distances through digital networks.

These cameras share the images across the internet, so CCTV footage can be easily accessed.

The primary use of a closed-circuit television camera (the CCTV camera of full form) is warning and deterring burglars, thieves and other criminals.

IP cameras are autonomous devices with the ability to communicate on the network directly without the requirement of an intermediate system as it happens in analog systems that are dependent on the VCR or DVR.

Network cameras are ideal for both domestic and commercial purposes because you can see what’s going on whilst away from the property.

At the same time, Argus 2 would send instant push notifications or emails to your mobile phone for you to take response actions and protect your properties.

There are numerous advantages of a digital CCTV system compared to traditional analog, to see more details of this comparison read the article: What are the advantages of IP cameras.

High definition cameras have such a high resolution that they’re mainly used in high risk establishments such as banks and casinos

Many families use closed-circuit television cameras, the full form of CCTV cameras, in home to keep track of elders, children or pets. After appropriate setup, you can check in CCTV cameras if elders fall down, children arrive home safely or pets eat food on time.