What Is CCTV Camera – Closed-circuit television (CCTV), also known as video surveillance, is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors. It differs from broadcast television in that the signal is not openly transmitted, though it may employ point to point (P2P), point to multipoint (P2MP), or mesh wired or wireless links.
Though almost all video cameras fit this definition, the term is most often applied to those used for surveillance in areas that may need monitoring such as bars, banks, casinos, schools, hotels, airports, hospitals, restaurants, military installations, convenience stores, and other areas where security is needed.
Videotelephony is seldom called “CCTV” but the use of video in distance education, where it is an important tool, is often so-called.
Surveillance of the public using CCTV is common in many areas around the world. In recent years, the use of body-worn video cameras has been introduced as a new form of surveillance, often used in law enforcement, with cameras located on a police officer’s chest or head.
Video surveillance has generated significant debate about balancing its use with individuals’ right to privacy even when in public.
In industrial plants, CCTV equipment may be used to observe parts of a process from a central control room, for example when the environment is not suitable for humans CCTV systems may operate continuously or only as required to monitor a particular event.
CCTV system with DVR
A more advanced form of CCTV, utilizing digital video recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion detection and email alerts).
CCTV with DVRs used by some specific industries, they require to retain three months or more of recorded video. This will require a lot of hard disk space to store the recorded videos, 60 up to 240 GB per camera is a common storage level these days and will increase maybe double in the future.
Standalone IP camera
More recently, decentralized IP cameras, some equipped with megapixel sensors, support recording directly to network-attached storage devices, or internal flash for completely stand-alone operation. This is usually used in a small house, using micro SD same as with smartphone the camera can record up to days with 16 GB micro SD memory.
This can be achieved by recording only scenes with movements. However, the question is it really nothing that happened during un-recorded times?
This is a sample of Wireless Security Camera 1080P Indoor that works with Alexa so you can check certain camera without lifting a finger only by saying “Alexa, show the front door camera”
Indoor vs Outdoor CCTV Camera
In terms of camera location placement, there are 2 categories, Indoor and Outdoor. An indoor camera usually has a pretty shape form so it will nicely be located inside the house but it does not strong enough for outdoor placement.
On the other hand, the outdoor CCTV camera has a rigid form but will stand in harsh weather.
History of CCTV
CCTV was developed in Germany by Walter brunch in the early 1940s it was then used by the US military in the testing of the v2 missile officials were able to monitor the testing close range without danger watching out for defects and other problems that might have otherwise gone undetected.
By the mid-1960s CCTV was being used in a few European cities to monitor public places such as train stations and city centers.
In the 1970s governmental and financial institutions worldwide began using CCTV in crime prevention by the mid-1980s the outdoor camera technology improved dramatically with the advancement of heaters and fans to reduce condensation and foggy lenses during this time the industry developed the pan and tilt features of the cameras or what is known as PTZ cameras busted during the late 1990s
Infrared technology was developed which allowed cameras to be placed in police cars traffic lights and in almost every public building in the country after 9/11 the industry exploded with sales on systems with infrared and high-resolution lenses.
New equipment was developed that was more vandal-proof and more advanced with facial and license-plate recognition CCTV is used currently on our roadways they help to monitor congestion in accidents by notifying the authorities when the average speed drops below a preset threshold or if the number of vehicles passing within a time period is above a certain threshold.