Here we look at the key drivers for selecting IP over analogue, and what people should be aware of when looking at specifying CCTV projects.
Improved image quality
There is a lot of talk in the industry at present regarding image quality and I feel that by working with the right partner there is no reason why “fit for purpose” IP based systems cannot help improve the perception of CCTV in the media and with the general public. Image quality of CCTV recordings is dependent on three factors: the compression standard, frame rate and resolution size. IP based systems can deliver improved image quality in two ways. One way is through more effective algorithms, using improved transmission mediums like H.264 to increase either the frame rate or decrease the compression without impacting on the bandwidth or storage requirement.
The second way is through improved resolution quality. IP can significantly improve on 4CIF standard analogue resolution. It can provide HD (High Definition) images, which increase the 4CIF picture size by approximately fourfold to significantly improve the image detail. This can then allow greater surveillance area coverage, providing larger and more detailed images, which can still be effectively examined using post-event digital zoom on recordings without pixilation. Improved image quality is key to the future of law enforcement and detection, as it provides the necessary detail when presenting footage as legal evidence. Even though the use of Megapixel or HD cameras could mean an increase in the bandwidth and correspondingly the amount of storage required, this is more than offset by the increases in storage with 1.5 and 2TB drives now on offer for the same price as 1TB, and even 1Gbps ports becoming standard on switches. As above this increase can also be offset by the use of H.264 as well.
Previously we have spoken specifically about the cost advantages of IP over analogue systems. If you would like to read these arguments and a detailed cost breakdown then please drop us an email at firstname.lastname@example.org or visit www.controlware.co.uk/tco.
Also if you would like to challenge Controlware to prove that IP can be just as cost effective, provide a better service than analogue or allow you to enable an upgrade to IP without replacing your entire system then please contact us.