Managing High-definition Video for a Police Surveillance Application
December 05, 2014Download PDF
A fixed wing police surveillance crew wanted a high-definition video management system that could integrate multiple diverse video sources from moving map and mission computers, camera turrets and auxiliary cameras.
Video streams needed to be presented on multiple displays, with each operator able to select either a single video source or a combination of up to four video sources simultaneously presented on a single display. For post-mission analysis, a selectable subset of these video streams is made available for recording and downlink. Curtiss-Wright's Video Management System (VMS) products proved to be the correct fit for these requirements.
Several members of the Curtiss-Wright video management family delivered a multi-functioning video management system that included mission displays, video switches and video recorders. Two video switches were chosen, the VDSU-1407 analog video switch, which supports up to 30 video inputs and 12 outputs, controlled by CAN bus from the operator displays, and the VDSU-1420 digital (HDSDI) video switch performing the equivalent function for digital video signals from the camera turret, relaying these signals to each of the mission displays. The AVDU4300 17"mission display supports two identical operator stations (two displays each). These displays have different software configurations to provide soft keys and functions appropriate to the operator's role. A fifth display, the AVDU2650, provides a smaller 10.4"screen. All displays are fully NVIS compatible and offer excellent daylight readability. Finally, the VRDV-3500 and VRDV-5004 video recorders are small form factor DZUS mounting units that use compact flash media to provide several hours of high quality standard and high definition video recording.
The installed system also includes other units such as a map generator, mission computer and uplink/downlink which are integrated into the video management system.
The resulting video management system combines a high level of functionality with an intuitive human interface, reducing operator stress during the most critical points of a mission. Each operator can independently select the view of the video data required at any given time, changing swiftly between full screen and quad (four-up) multiple window presentations. The system integrator benefits from an easily installed, flexible and future-proof system that reduces cabling complexity and provides for straightforward addition of extra video-related components such as cameras, recorders and computers as part of future platform upgrades. These video management products are pre-qualified to the DO-160 standards for airborne equipment, reducing the risk to the integrator as the aircraft is commissioned and certified.