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Bringing a Digital Dimension to CCTV on the Ground and on the Move |
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AD Mobile is very much at the forefront of CCTV networked solutions and is responsible for the development of the pioneering NetVu range of advanced video network server products. It has also been responsible for bringing to market TransVu, a sophisticated mobile CCTV system, designed specifically to operate within the rigours of urban transit systems. TransVu brings a new level of sophistication to mobile video operation. Previous generation systems were only capable of recording images from cameras. TransVu can handle system information from the vehicle, simultaneously recording vital system data like engine speed, oil pressure, operation of brakes / accelerator and indicators. GPS data can also be utilised, pin pointing the position of the vehicle at all times, reporting if the vehicle is off-route, or providing logged information of the vehicle’s journey. Like all NetVu based products, TransVu has extensive networking capabilities. Large bus operators in the UK have utilised wireless networks at their depots to automatically download images and data from their vehicles. This has meant a huge saving in man-hours compared to non-networkable systems. Each TransVu on a network can be assigned its own unique passwords and the in-built firewall further protects the system’s security. TransVu has an in built self diagnostic program, which can report system malfunctions, like camera failures, to a host network. It will also report intermittent failure of video, even if the cameras have been masked or defocused. For the first time an operator of a large fleet of vehicles can take pro active maintenance action as soon as trouble occurs. All TransVu units are now fitted with an inertial sensing device, capable of measuring acceleration, braking and cornering forces. The read out is continually logged and excessive braking or turning can be used to generate video events for later perusal. This feature has been used extensively to ascertain the validity of claims in low speed impacts on public transport. Dual channel audio is provided as a standard feature, along with a PPP interface allowing images to be transmitted over mobile telephone networks. |
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From school buses in the US to trains in the Netherlands, the passenger transport environment places tremendous stresses on any electronic system so TransVu has to be extremely durable, with the sealed recorder unit suspended via aerospace grade mountings to eliminate heavy vibration. The TransVu units, which apply AD Group’s common software interface, ‘NetVu Connected’, can utilise either one or two internal hard disk drives for storage, although some operators may prefer a single removable drive which can be taken from a unit in the event of an incident. The Answer is Evidential All individual images stored by the TransVu digital recorder - which can be archived to PC or mass storage devices - carry vital header information, including date and time and details of any alarms, and can be displayed with the image on playback. For evidential purposes TransVu supports watermarking where a unique finger print is assigned to a range of images. As a result, when evidence is submitted to the police - for example on CD - the watermark data can be issued as a watermark certificate. To verify the authenticity of the CD at a later stage a second certificate can be created from the images on the CD. If the two certificates match then the CD has not been tampered with. In some cases evidence provided by the TransVu unit may be able to assist transport operators by providing vital protection against fraudulent attack/injury claims.
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