
IP CAMERAS : :
The Network Attached IP Cameras provide
an easy way to capture and distribute live images over
a network or the Internet using a standard web browser.
You can monitor your home or office from anywhere in
the world by just logging on to your website.
Network Camera Technology (also called
IP Camera Technology) can be described as the technology
that allows us to view a stream of images, live or recorded,
over a computer network or the Internet. For example,
Network Camera Technology enables us to view a camera
installed in New York from an Internet connected computer
located in the UK. The label 'Network Camera Technology'
(also IP Camera Technology) derives from the underlying
premise that the camera is viewed via an IP network,
in which the letters IP stand for Internet Protocol.
IP networks are the most common networks
used for data communication and we all use them every
day at work and at home by sending and receiving e-mails,
using our organisations' computer networks and browsing
the Internet. The fact that IP networks already are
more or less in every work place and also in many homes,
makes it easy and cost-effective to install a network
camera in virtually any location. The widespread availability
of IP networks around the world and in our every day
life gives every organisation or individual that has
a camera system requirement the opportunity to implement
such as a system at significantly reduced cost.
It is commonly accepted that network camera
technology offers the following benefits:
Remote access to live and recorded images
of any location, at any time and from wherever you are
The possibility to monitor a large number of remote
sites from one central location offers huge cost saving
potential
Networked video systems have many automated and advanced
features, significantly reducing the time and resources
spent on monitoring, managing and maintaining a video
system
These automated and advanced features enable improved
security operations to be implemented
Reduced installation cost by utilising existing communication
networks and reduced cabling requirements
These benefits are discussed in more detail
below.
Remote access
'Remote access to live and recorded images
of any location, at any time and from wherever you are.'
Network Camera Technology allows us to install cameras
in London, Dublin, Belfast and Glasgow and view them
all from a PC based in Manchester. All that is required
is that each of the cameras and the PC in Manchester
are connected to a corporate computer network or the
Internet. In fact, the four cameras could be viewed
from any PC with access to the corporate network or
the Internet, regardless of whether this PC is located
in Manchester, Birmingham or Sidney for this matter.
The cameras can also be viewed by more
than one person at the same time. One person could be
in Manchester, one in Birmingham and another person
in Sidney and they would all be able to access the four
live cameras at the same time.
Instead of having only one camera on each
of the four locations, it is possible to add numerous
cameras to each location and also add other locations.
As far as the technology is concerned, it does not matter
if only one camera is required on only one location
or if 20 cameras are required on 10 different geographical
locations, scale is not an issue. This 'scalability'
often also is mentioned as a key benefit of Network
Camera Technology, as it allows users to start off with
the implementation of one or only a small number of
cameras on one location initially and gradually build
a more comprehensive camera network encompassing larger
number of cameras and multiple geographical locations.
Access to live cameras on remote locations
reduces the need to travel in many cases and often leads
to less travel time and reduced cost as a result.
Network Camera Technology provides users
much more than just a live image from a remote camera.
Using the same technological principles, users also
can view recorded video material via a corporate computer
network or the Internet. Typically, camera output is
recorded on a network connected PC or Digital Video
Recorder, which both can be accessed from any PC on
the corporate network or the Internet.
Remote access to video recordings makes
the distribution of recorded evidence material to the
required people a very easy task. Where in the past
evidence was held on a video tape or disk that required
physical distribution or travel to the location where
the evidence was recorded, now video evidence can be
distributed via the network, like any other file or
document we electronically sent to each other.
With the rise of wireless technologies
it has become possible to connect a network camera to
a computer network without using any cable, creating
even greater flexibility in where a camera can be installed.
Also, advanced mobile phones and other mobile handheld
devices (e.g. PDAs) that provide Internet access allow
users to view live and recorded video from their network
cameras while travelling, regardless of where they are.
Cost savings
through central monitoring
'The possibility to monitor a large number
of remote sites from one central location offers huge
cost saving potential'. Network Camera Technology allows
us to monitor an unlimited number of remote sites from
one central location. Whether a company has 3, 50 or
300 sites scattered across the UK, or the world over,
all sites can be visually monitored from one central
station.
Whereas conventional CCTV systems are
operated locally and require local monitoring staff
on each individual site, Network Camera Systems allows
monitoring and system management from one central point
and as a result reduces the staff requirements on each
of the locations. It also allows the implementation
of one central control team, with central decision making
powers, that manages and gives instructions to local
operatives. It will be obvious, the larger the number
of sites within the organisation, the larger the cost
saving potential will be.
Automation
reduces the amount of resources required
'Networked video systems have many automated
and advanced features, significantly reducing the time
and resources spent on monitoring, managing and maintaining
a video system'. It would be huge task to list all the
advanced features found in network cameras today. Therefore,
only a small number of the most used features are mentioned
here.
Movement detection: A number of network
cameras have built-in movement detection. Different
manufacturers use slightly different detection techniques
and have given it slightly different names. Examples
of the terminology used are Digital Motion Detection,
Activity Detection and Video Motion Detection. In general,
a camera can be set to trigger an alarm on the detection
of movement and automatically send and alarm notification
by e-mail to relevant staff.
Image buffers: Most cameras with a motion
detection function also feature image buffers. Image
buffers contain pictures of the moments jut before movement
is detected and the alarm is triggered. The 10 or 20
seconds prior to an alarm event often holds crucial
information of an incident, which without this feature
would not be available.
Automated recording: In addition to its
prime function of alarming staff, one of the other main
benefits of using motion detection is that it allows
the recording of images on alarm trigger only. This
way recording takes place only when something is actually
happening. It avoids recording and storing hours or
days of video material that shows nothing has happened.
This makes is much easier to find the relevant video
material of incidents that did take place. Using recording
on motion detection also reduces the amount of video
sent over the network and the amount of video material
stored, which, depending on network and storage capacity,
both could be an important factor to consider. Whether
recording 24/7 or on motion detection, there is no need
for video tapes. Video recordings are stored digitally
on hard disks and can be automatically deleted after
a set period of time, e.g. 30 or 31 days. As such, video
recording can be completely automated and requires no
human intervention. System management has become much
easier, requires much less staffing resources and as
a result can be carried out at reduced cost.
Pan, Tilt and Zoom: A number of network
cameras have Pan, Tilt and Zoom (PTZ) functionality.
This allows users not only to view the camera from a
remote location but also to control it. Some cameras
can be moved to the left and right and up and down within
set limits while others can rotate a full 360° and
pan 180°. Network cameras with a Zoom functionality
allow users to obtain close up views of certain objects,
areas or people. Network cameras with PTZ functionality
are a powerful tool to monitor large or sensitive areas
from a remote location.
Smart software: A number of network cameras
have enhanced processing power and internal memory that
allows them to be loaded with so called 'smart' or 'intelligent'
software. Examples are number plate recognition, facial
recognition and event recognition. An example of the
latter would be an individual taking an unusual amount
of time to open an entrance door, which the system would
recognise as suspicious behaviour and therefore would
trigger an alarm that could be sent to various people
on the network.
Day/night functionality: Some network
cameras feature day/night functionality. They provide
colour images during the day (or in general terms, when
there is sufficient light) and automatically switch
to black and white images at night (or in general terms,
when there is low light). Network cameras with a day/night
function are suitable for 24/7 surveillance.
Wireless network cameras - A number of
network cameras are so called Wi-Fi compatible and can
be installed without the need to use a cable between
the camera and a network point. Because there are no
cabling considerations wireless network cameras can
be installed virtually anywhere.
Improved
security
'The automated and advanced features of
Network Camera Technology enable improved security operations
to be implemented'. System functions such as automated
alarm notifications by e-mail, image buffers containing
crucial information, automated digital recording, smart
software and central / remote control and decision making
all can contribute to an improved security operation.
Lower installation
cost
'Reduced installation cost by utilising
existing communication networks and reduced cabling
requirements'. Network camera systems, in the majority
of cases, require much less cables and cabling work
than conventional camera systems. Therefore, the cost
of installation usually is much lower, especially for
larger camera installations.
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