The security industry has been doing quite well in the past decade due to awareness of the products to ensure safety.
Many
business entrepreneurs, who want to start on their own face many
hurdles because of the extreme competition online and not enough
technical knowledge on the products.
The security camera industry
is constantly evolving with the addition of latest cameras and
cutting-edge technology. This has propelled many technical terms
associated with every device such as "frames per second", "horizontal
lines", "images per second", etc.
It is very important to understand the technical know-how of the terms.
This
helps you be aware of the compatibility of a product and its features
with your system to make an informed decision on a purchase
So to help you out we have put together a quick guide of all the major terms you will hear within the industry.
PAL
PAL
or Phase Alternating Lines, is a standard video system used in the
Eastern countries, which transmits 25 frames in each second. 625
individual scan lines make up one frame
NTSC
NTSC or
National Television System Committee, used mostly in North and South
America, transmits 30 frames each second. 525 individual scan lines make
a single frame.
CCD sensor
CCD or Charged Coupled Device
sensors in security cameras capture images that have better quality and
less noise as compared to CMOS sensors.
CMOS sensor
A CMOS
sensor captures images & uses less power as compared to a CCD
sensor and is cheaper. It works well for wireless or for battery-powered
cameras
Pinhole Camera
In pinhole cameras, one of the oldest types of cameras, you can capture high-quality still images but blurred moving images.
CCTV Security Camera System
In
CCTV technology, images can be captured & stored without using tape
and can be wireless. It also records action and responds by setting off
alarms, call the police and more.
720p
720p is the
resolution, or quality, of the picture displayed on a monitor with
high-definition resulting in sharp images. "720" represents the number
of horizontal scan lines (720) of resolution. The "p" is the progressive
scanning that gives a smoother picture with 720 lines being refreshed
30 times in a second.
1080i
Here "1080" is the number of
horizontal scan lines. "i" stands for interlaced scanning, a process
where frames are mixed to form a smoother picture with less flicker.
LUX
LUX
is a method to measure the amount of light that is needed for the
security camera to capture images. A lower LUX means the camera has the
ability to see images more clearly in the dark. E.g. 1 LUX - good
quality images in late evening, 0.5 LUX - dim lit areas at night,.05 LUX
- captures images better than humans at night.
DVR
A
Digital Video Recorder or DVR is a general term for a device that
records television data in digital format. It encodes video data in
MPEG-1/ MPEG-2 formats and stores data in a hard drive and the
capability to pause "live" TV and continue without missing any part of a
program.
Wired Security Camera
A "wired" camera is
hard-wired to the monitor and recording systems. The image cables are
needed to transfer the camera images, then changed to a signal and sent
to monitors, where signals are decoded in to live pictures.
Wireless Security Camera
Wireless
cameras as the name suggests are "wire-free" and use electronic signals
to relay images to the monitor/receivers and are converted to pictures.
IP Security Camera
it
use Internet Protocol to transmit images and control signals over an
Ethernet link. Also known as network cameras, they are primarily used
for surveillance similar to analog closed-circuit television.
Super HAD CCD sensor
Super
HAD CCD sensor, a Sony product, provides twice the results than
traditional CCD. Used in security cameras, these sensors allow cameras
to be in environments for long periods of intensely bright ambient light
or darkness.
RF
RF stands for Radio Frequency; video signals must be modulated into a RF signal to be transmitted across a wireless network.
Interline CCD sensor
Interline
CCDs are used mainly in image sensors used for capturing moving images
like security cameras. They avoid image smear because light cannot
affect the masked pixel storage area and these security cameras are
inexpensive.
Horizontal Definition
It is the highest
amount of individual picture elements recognizable in a single scanning
line. The clarity and sharpness of an image produced by the camera
depends on higher number of lines resulting in greater definition of
images.
Angular Field of View
AOV is defined by the field
of view that the camera covers which is a few degrees above and below
the angle it is pointed at. The images captured depend on the size and
area covered by the camera.
Effective Distance
It is
measurement of how far the camera can "see". There 2 types of effective
distance: day distance and night distance. Security cameras use infrared
technologies to capture details of images at a distance.
BNC Connector
A
BNC is a video connector usually used in a wireless security camera
system. It makes use of RF to broadcast images captured by the security
cameras to monitors and recording equipment. Using the above glossary,
you can educate yourself on the technical dictionary of security
cameras.
You can also post it on your site to make it easier for
the customer to choose the right security camera based on their needs.
Each glossary term can be a separate page with recommendations of your
products with that capability alongside.
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