Advanced Digital Urban Video (DUV) Solution for Strategic Video, Audio and Data Transmission

Advent Communications

Designed principally for government security agencies and military deployment, the Digital Urban Video system (DUV) enables video surveillance to be conducted in densely built-up areas and over significantly extended ranges.

Based on Link Research's proven technology in the demanding field of global broadcasting, the new DUV system is a direct response to the requirement for improved counter-terrorism surveillance in urban environments, representing a major advance in both performance and facilities for mission-critical applications.

The key breakthrough with the dedicated DUV solution revolves around its ability to overcome the traditional challenges of built-up locations for analogue wireless communication links, particularly with the high bandwidths required for live video transmission.

Matthew Richards Vislink Group's Director of the Defence, Law Enforcement and Security Business Division, explains the significance of this launch: ”Our systems have been proven in the most demanding conditions around the world by broadcasters and newsgatherers, who rely on our technology to acquire and transmit breaking news. We see a clear correlation between this application and the specific requirements of government and defence agencies, creating a dedicated solution for this sector.

The combination of our ultra low latency digital COFDM transmitters and receivers, plus the cellular interoperable architecture, brings together the tools required for modern surveillance irrespective of the environment. This will enable a new level of image resolution, range and performance, in line with the ever changing challenges faced by our defence and law enforcement agencies."

Delivering real-time images for critical missions and decision-making, DUV combines three key elements to ensure unparalleled performance, quality and reliability for covert and overt surveillance duties. Firstly, the solution is based on Link Research's proprietary low latency Coded Orthogonal Frequency Division Multiplexing (COFDM) radio technology, which is designed to overcome the traditional issues of multi-path distortion and transmission failure in typical urban environments.

This is complemented by leading edge diversity systems, using multiple antennas and transmission paths to avoid dead spots and deliver enhanced performance and range coverage. The third element is Link Research's proven Standard Definition (SD) and High Definition (HD) wireless technology, which ensures the highest quality images for precise target identification and monitoring over greatly extended distances. The entire DUV system is underpinned by the company's proprietary state of the art encoding technology for the utmost performance reliability.

Conceived as a scalable, high power and portable system, the DUV is actually able to capitalise on the multiple signal reflections in urban areas, recombining the video transmission input from up to 2000 separate signal carriers to enhance performance and deliver remarkable results.

The core COFDM technology is designed entirely in-house, including transmitters, receivers, antennas and modulation techniques - enabling specific security requirements to be matched. The central receive system, combined with proprietary antenna designs, allows deep penetration in the most severely built-up environments and potentially underground.

Operating along similar lines to a mobile phone network, the cellular diversity technology allows any wireless camera - hand-held, vehicle, or airborne-mounted - to be tracked seamlessly as it moves between multiple receive sites, extending the coverage area greatly. The system uses data automatically from multiple antennas to derive video and audio signals.

Link Research's cellular diversity networks are already deployed in many European cities and towns; for example, the BBC has set up cellular receive sites with fixed receivers for its wireless cameras in the heart of nine major UK cities - Cardiff, Middlesborough, Carlisle, Newscastle, Manchester, Belfast, Swindon, Oxford and Bristol. This enables a small news team - typically just a reporter and cameraman with a wireless camera - to cover a breaking news story and transmit live pictures back in real time, without the need for a dedicated satellite news gathering (SNG) vehicle.

DUV can be deployed in any environment, using a combination of covert and overt body-worn products, manned and unmanned vehicle installations, systems for perimeter and border deployment, as well as for use with fixed and mobile assets. All equipment can be linked to provide fully networked integration, on the ground and in the air. An expert consultation service is available for complete turnkey solutions, including city centre networks, vehicle installations, and re-deployable modular systems.

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