Security
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will only be as good as the connectivity and this is more than likely to impact on the clarity of the image that is transmitted by the camera. Also for consideration is that with cameras of such high megapixels (can be over nine times the resolution of analogue) the memory capacity required for recorded image data storage also greatly increases. IP CCTV is a technology growing in popularity
but for the average small to medium installations is still an option yet to mature in the UK market.
AHD (Analogue High Definition) This is the most recently developed solution
for transmitting 720P and 1080P HD digital video in a CCTV surveillance system. The core concept of AHD is to deliver high definition video using digital TV (DTV) transmission. AHD leverages the extremely robust AV transmission capability of DTV to easily and seamlessly upgrade an analogue CCTV surveillance system to digital full HD. With AHD, high definition digital video can be transmitted easily over existing coaxial cabling – the same cabling used for existing standard resolution analogue systems (such as 960H) and the HD option of HD-SDI. However, AHD does not suffer from the DVR to camera cable run limitation that is experienced with HD-SDI. In fact AHD cable runs can easily exceed 300m – longer than a standard analogue system’s capability. AHD products are, on average, lower cost than HD-SDI and also provide compatibility with
34 | electrical wholesalerSeptember 2015
standard resolution cameras, allowing a mix of standard and HD cameras connected to a single DVR. This is most useful if only a partial upgrade to HD is required. In system upgrading to HD, the DVR and the cameras will need replacing with AHD units.
Although this is the newest option, it is
already the fastest growing and it is expected that AHD will be the de facto standard for digital video surveillance systems both now in the future.
Wireless Technological developments will continue
to drive the replacement market in particular, with wireless technology and cloud based surveillance making more of an impact. The use of wireless technology is already established in intruder alarms, whereas with CCTV – which is undoubtedly the main focus of many installers’ business – it is safe to say that wireless surveillance is still a considerable way off and promises much potential for the future. The way in which we communicate today with mobile technology has led to the everyday adoption of 3G and 4G data transfers and these too are options for the CCTV market. 3G was good, but via 4G we have become used to streaming HD movies to our phones and tablets so it is only expected that CCTV will follow suit. Surveillance over 4G can give higher frame
rates and also allow integration with other systems which will be of huge benefit to public agencies or those wishing to share data.
Opportunity For those electrical contractors not already on
board, the CCTV market presents them with a tangible opportunity for diversification. They will already possess the necessary skills to operate in this complementary and growing sector and are ideally placed to take full advantage and include an extremely lucrative addition to their electrical business. CCTV security systems can take the form of simple video surveillance systems for small shops and business premises to large complex projects such as urban traffic management systems, town centre surveillance systems and high profile buildings. Businesses use Closed Circuit Television to
protect and monitor their staff, their premises, their stock and their customers. From running a retail warehouse to managing local authority properties, CCTV lets you see exactly what's happening without the need for a physical presence. It also provides effective protection for
residents on housing estates, goods in shops and valuable assets in businesses. It also acts as an ever-watchful eye at remote sites or where staff levels are minimal and helps improve safety systems or assisting in traffic management. With overall growth of over 10% forecast for the UK CCTV for 2014-2018, those electrical contractors who embrace the opportunities and latest technologies that the CCTV industry offers, can take a share of this lucrative market and add further value to their business portfolio.
www.espuk.com www.ewnews.co.uk
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