IP-based closed circuit television (CCTV) is replacing analogue systems as demand for reliable surveillance tools grows to meet heightened security needs, analysts said today.

"The market is currently being held up by conservative companies not wanting to replace their existing systems, and I expect a long replacement period," said Chris Cherrington, market consultant for analyst group Frost & Sullivan. "The vendors are playing up image recognition, but that's still not proven technology."

More effective and manageable storage would be the main driver for the migration to IP, he added, because the storage and sifting through of videotapes proves a burden for many companies.

Analogue CCTV provides basic visual imagery saved on a video recorder, but tapes can only be used and recorded over 10 times, leading to poor quality, according to networked video specialist IndigoVision.

"Analogue CCTV is expensive, poor quality and has had its day," said IndigoVision chief executive Oliver Vellacott. "IP CCTV is easier and cheaper to store, offers better quality, and adds new functionality such as image recognition, which will make security surveillance significantly easier for over-stretched staff."

Brussels Airport is one of the first major sites to incorporate an IP CCTV network, with 700 cameras being installed as it doubles in size from one terminal to two. Given recent events, airport security has come under closer scrutiny than most other areas.

"IP CCTV offers the opportunity for different agencies to collaborate and instantly identify and track the movements of individuals and baggage," said Dominic Oughton, managing director of security equipment vendor Baxall, which is orchestrating the Brussels project.

The airport system will offer real-time streaming over wireless Ethernet, visible through compatible mobile devices.