CCTV (closed-circuit television) is a TV system in which
signals are not publicly distributed but are monitored,
primarily for surveillance and security purposes.
CCTV relies on strategic placement of
cameras and private observation of the
camera's input on monitors.
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.
CCTV systems are categorized into different types. It may be
analog or digital. The working principle of CCTV camera is
dependent upon these components -
• CCTV camera,
• CCTV camera lens,
• CCTV monitor and
• cables that carry the signal from one place to another.
CCTV (Closed Circuit TV) uses one or more video cameras to
transmit video and sometimes audio images to a monitor, set
of monitors, or video recorder. The difference between CCTV
and standard TV is that standard TV openly broadcasts
signals to the public. CCTV is not openly transmitted to the
CCTV uses either wireless or wired transmission to send the
broadcast from the video cameras to the monitor(s) or
recording device. Most CCTV systems are used for
surveillance, which can include security monitoring, spying,
or safety monitoring.
The Various types of CCTV cameras are:
Bullet: A bullet CCTV camera is a wall-mount or ceiling-
mounted unit that is typically designed for indoor use, but
can also be fill some outdoor applications.
Dome: A dome cameras get their name from the dome-
shaped housing in which they sit. These housings are
designed to make the cameras unobtrusive… not covert or
hidden. Typical applications are retail, where the camera is
designed to be unobtrusive, but visible.
Covert/Desktop/Board Cameras: These tiny cameras
are well suited for desktop use for Skype and other low-
resolution teleconference applications
Discreet Cameras: It’s clock… it’s a smoke detector…
it’s motion sensor. The real answer is none of the above.
These are just some of the disguises for covert cameras.
Infrared/Night Vision: These night-vision cameras
have the ability to see images in pitch black conditions using
IR LEDs. In some cases they are for mobile applications.
Outdoor: The key to outdoor cameras is the housing itself,
which must be impenetrable to moisture, insects, dust and
Day/Night: Day/night cameras compensate for varying
light conditions to allow the camera to capture images. These
are primarily used in outdoor applications where the security
camera is positioned for an outdoor parking lot.
Varifocal: A camera with a varifocal lens allows the
operator to zoom in or out while still maintaining focus on
Network/IP: These cameras, both hardwired and
wireless, transmit images over the Internet, often
compressing the bandwidth so as not to overwhelm the
web. IP cameras are easier to install than analog
cameras because they do not require a separate cable
run or power boost to send images over a longer
Wireless: Not all wireless cameras are IP-based. Some
wireless cameras can use alternative modes of wireless
transmission. But no matter what the transmission
method, the primary benefit to these units is still the
same: extreme flexibility in installation.
PTZ/Speed Domes: Pan/tilt/zoom cameras give
the surveillance operator the ability to move the
camera left or right (pan); up and down (tilt); and
zoom the lens closer or farther.
High-Definition Cameras: Ultra high-definition
cameras are often relegated to niche markets,
such as casinos. These give the operators the
ability to zoom in with extreme clarity (to look at
poker players, for example, who might have
something up their sleeve).
CCTV is a very useful instrument for many
reasons. Some of them are : preventing
crimes like thefts, helping the police and
watching the employees
CCTV can protect employees. In lots of jobs
the employees are vulnerable to either
physical or verbal attacks from the public.
It is able to protect the employees against
false allegations that might be common in
some areas of business.
The hidden cameras are able to help
investigators to identify how a crime
happened and to spot it in action. However,
they are more likely to prevent the crime from
occurring simply by letting everyone know
they are being watched.
CCTV cameras and monitoring systems
improve the security and safety of a
particular property. Through remote
monitoring inside the house, you can identify
what exactly is going on outside.
Some CCTV system recordings can even be
viewed on smart phones or tables via
intelligent mobile applications and facilities.
CCTV systems can also be used to obtain
evidential quality images and recordings of
suspects that may be involved in any criminal
activity within the area being monitored.
CCTV recordings serve as irrefutable evidence
in any investigation.
A CCTV system can help prevent crimes and
discourage any intruder from bothering you
at home. Sometimes, just seeing a mounted
camera and alarm system, an intruder may
decide to move elsewhere.
More importantly, a well-built and functional
system can provide families with an increased
sense of security and peace of mind.
Installing a CCTV camera is a low-cost
investment in keeping an eye on your
children, pets, and properties.
If installed correctly and used responsibly,
you will realize and accept the many benefits
of CCTV camera and systems. They offer
many advantages for a home or business
However, like with any security tool and
technology, it is important to identify the
correct type of equipment that will fulfill the
Before making the important decision of installing
security camera systems, it is better to be equipped
with complete knowledge about them, as that will
enable you to make an informed decision and help
you choose a camera that fulfills your needs and
Once you’ve weighed the pros and cons of setting
up this technological marvel, you will feel better
about your choice.
We are here to help you out to clarify your doubts
regarding cctv cameras….