Transcript (PPTX, 3.41MB)

NETWORK VIDEO SURVEILLANCE
CCTV
Closed-Circuit Television (CCTV) is the use of video cameras to
transmit signal to a specific place on a designated device.
It may employ point to point (P2P), point to multipoint or mesh
wireless links.
Applicable for surveillance in areas that may need monitoring such
as banks, casinos, airports, military installations and convenience
stores.
CCTV systems may operate continuously or only as required to
monitor/capture a particular event.
ANALOG BASED CCTV
An analog surveillance camera consists of a CCD sensor. Which captures the image and then digitizes
image for processing. But after transmitting the video, it needs to convert it back to analogue so it
can be received by an analogue device such as a video monitor or recorder. Unlike IP cameras,
analog have no built-in web servers or encoders and these networking functions are implemented
only on recording or controlling equipment .
Analog surveillance video resolution is measured in terms of broadcast TV lines as viewed on a
monitor screen. Video quality is charted with converging lines of higher and higher density. The TVL
resolution number is the line density where the camera is no longer able to reproduce individual
lines. The higher this number is, the better the picture.
For Example
480 TVL
510 x 492
600 TVL
768 x 494
650 TVL
811 x 508
700 TVL
976 x 582
ARCHITECTURE OF ANALOG CCTV
IP BASED CCTV
An IP camera is a camera that digitizes and processes analog images, encodes them internally, and then transmits
the video information digitally over an Ethernet connection to a computer or similar device.
An IP camera can have either a CMOS or a CCD sensor, and is available in the same styles as traditional surveillance
cameras such as Pan/Tilt/Zoom, domes, bullets, box, infrared, covert, and wireless.
IP cameras are typically equipped with an embedded web server and can be accessed and controlled over any IP
network such as a WAN, LAN, Intranet, or Internet. By utilizing a standard web browser or client software users can
view an IP camera’s video output from any local or remote location.
IP cameras combine the capabilities of a camera with some PC functionality, do not require a direct connection to a
PC to operate, and can be placed anywhere within a network. Just like any other PC on the network, an IP camera is
a “network appliance”.
It has its own IP address, connects directly to a wired or wireless network.
A network camera that offers megapixel resolution uses a megapixel sensor to deliver an image that contains one
million or more pixels.
The more pixels a sensor has the greater the potential it has for capturing finer details and for producing a higher
quality image. Megapixel network cameras can be used to allow users to see more details (ideal for identification of
people and objects) or to view a larger area of a scene.
This benefit is an important consideration in video surveillance applications.
Display format
No. of pixels
Pixels
SXGA
1.3 megapixels
1280x1024
SXGA+(EXGA)
1.4 megapixels
1400x1050
UXGA
1.9 megapixels
1600x1200
WUXGA
2.3 megapixels
1920x1200
QXGA
3.1 megapixels
2048x1536
WQXGA
4.1 megapixels
2560x1600
QSXGA
5.2 megapixels
2560x2048
Megapixel resolution is one area in which network cameras excel over analog cameras.
The maximum resolution a conventional analog camera can provide after the video
signal has been digitized in a digital video recorder or a video encoder is D1, which is
720x480 pixels (NTSC) or 720x576 pixels (PAL).
The D1 resolution corresponds to a maximum of 414,720 pixels or 0.4 megapixel. By
comparison, a common megapixel format of 1280x1024 pixels gives a 1.3-megapixel
resolution. This is more than 3 times the resolution that can be provided by analog
CCTV cameras.
ARCHITECTURE OF IP CCTV
PROPOSED NETWORK SOLUTION FOR UFLEX
SOLUTION ADVANTAGE
Enhanced Project Value: Comprehensive + Fiber ready development
Enhanced Connectivity: Enhanced access to Multiple Data + Content Services with minimal connection costs.
Value Added Services as Standard Offerings: Value added Services - CCTV + Security + Voice Intercom will be connected
via the IP Phones.
Future IP Based Services can easily be added on if proper Infrastructure executed.
Lower Cost – High Return Model: The ability to uptake up to more than one potential Services .
Maintenance: The service will have extra Capacity , offering quality service and easier planed maintenance.
Access: IP Camera has one specialty; we can access the stream of security surveillance images from anywhere. Images can
be access on the mobile with the help of internet. Remote access is not possible with CCTV camera as they are closed circuit.