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What benefit does IP Video Surveillance provide over analogue-based equipment? Print
September 2008
IP Video Surveillance provides a higher level of fitness for purposes, lower cost of ownership and operating, and more user functions than an analogue or DVR based system.

1. Clearer captured images

    - Some IP cameras produce images in Megapixel resolutions (1280 x 1024).  These images are more than 3 times clearer than the best analogue cameras.
    - IP cameras employ progressive technique to display each frame on the monitor screen whereas analogue cameras employ interlaced technique (odd lines and even lines updated alternately).  The difference will be more visible for moving objects.

    - IP camera images stay as digital and do not degrade over time or distance.  Analogue camera images degrade each time it is converted.
2. IP camera footage can be retrieved much faster than analogue

3. IP system provides more user functions for monitoring such as coordinating all camera live displays on a map and patrolling several sites on one screen

4. IP is the modern approach for implementing video surveillance system.  Being a modern approach, it provides the benefit of future proofing to customers.  That is, installed systems will get technical support and enjoy ease of upgrading and maintenacne.  This situation implies that analogue equipment for video surveillance is on the way out.  We will find that no more research and development effort will be spent on analogue equipment.  That is, any improvements in capabilities, flexibility and scalability will happen on IP equipment only.

5. Analogue cameras are linked to the monitoring system by point-to-point cables.  IP cameras do not need point-to-point cabling, and can use any standard Ethernet cable network if one exists.   This is a big cost saving as well as more organized use of space for cabling.

6. DVR systems are proprietary.  Once we have installed a specific brand of DVR, we wil have to use its components for expansion or maintenance.  IP NVR systems are based on open PC standards.  An example of benefits is the storage size and lower pricing.  Storage can be tens of Terabyte, something DVR cannot do.

7. Most DVR's are designed for a max of 16 cameras.  Customer will need a second DVR for installing the 17th camera.  IP is scalable.
(updated 21/3/2009)