14 December 2012



Mobile DVR: On-road security solution


In the last two years, rapid advances in mobile digital video surveillance technology have taken fleet protection and management to unprecedented levels of sophistication and diversity.


However, warns Zane Greeff, technical director of Elvey Security Technologies, the market is now awash with mobile DVR products, some of which are woefully below standard.


According to Mr Greeff, the main features of a high-end mobile DVR system include being able to record continuously for a lengthy period of time without failure; coping with the unstable power supply associated with vehicles and being able to withstand vibrations and impacts, factors which would be lethal for regular recorders.


“Prospective buyers need to do their homework carefully before making a purchase that could end up under-delivering,” he says.  “While a system might impress in a stable office environment, unless it offers five key elements, namely reliable power supply, effective anti-shock mechanism, high quality data transmission, solid interface and resistance to dust and heat, it’s going to disappoint on the road.”


He adds: “These elements, combined with 3G/GPRS technology and ever-increasing Internet and download speeds, will deliver the reliable, effective live video streaming that is so critical to vehicle security, driver behaviour management, fuel monitoring, theft reduction, evidence gathering and passenger safety.”


Through the use of ground-breaking video streaming technology, modern-day vehicle DVR systems fulfill a number of functions, continues Mr Greeff.  Not only can they pinpoint the position of vehicles, they can also see in real time what’s happening on board.  What’s more, live video footage can now be received on mobile phones and other portable devices such as iPads and laptops as well as the control centre. 


The installation of PTZ cameras makes for additional control, he notes further, since owners and controllers can zoom in and out, and even change the direction of the camera in order to see what’s happening on the road.  The technology can also be used to provide evidence of traffic accidents and send alarm signals to the control center in emergency situations.


Last but not least, a good quality mobile DVR will have a long life span and give stable performance, which will reduce maintenance costs.


To this end, Mr Greeff urges anyone wanting a benchmark against which to measure mobile DVR systems to use Dahua’s new mobile DVR, which he says boasts exceptional performance in all areas.


“Dahua’s latest product, which is the size of a standard car radio and therefore easy to conceal, is ideal for deployment on buses, trains, taxis, law enforcement and cash-in-transit vehicles,” he says. 


Designed for direct deployment in tough out-of-plant or on-road environments, this particular mobile DVR also boasts a powerful network software package which includes a built-in web server and multi-DVR client and mobile phone surveillance software.


Highlighting its many features, Mr Greeff starts with the Dahua’s pluggable HDD case which has been designed to handle tough terrain and withstand severe shock.  It also boasts air connector converters which combine to deliver a previously unmatched level of shockproof performance and water proofing.  Its power supply, which operates on a range of 8 to 60 volts, also impresses with its ability to afford protection against over- and under- voltage, short circuits and over-current.


The system offers various viewing options, including live viewing, recorded playback, back-up and remote access, which allows control room personnel to keep their fingers firmly on the CCTV pulse.  Using H.264 video compression and PCM audio compression technology, the Dahua mobile DVR can record up to 30 frames per second.  Its multi-information display feature provides information on vehicle identity, time, DVR channel, GPS co-ordinates, speed and station name. 


Other features include 4 channel audio input and two channel audio output as well as four channel simultaneous playback and smart-video functions such as motion detection, camera blank and video loss. Equipped with a sim card slot at the back of the DVR, which allows for network connectivity, the system comes standard with two TV video outputs, an air connector to BNC and 1 VGA.   


Four self-defined, four-sided zones allow for privacy masking on each camera, should there be any need to block out objects from the viewing field.   


Data back-up can be done in a number of ways: through the pluggable hard drive case, via USB flash drive, USB hard drive, USB CD/DVD writer, SD card or network downloads.


Should an owner require audio access to his driver, all that’s needed is the addition of a 4 port extension.  This will make it possible to achieve bi-directional talk between driver and fleet controller, a handy feature in an emergency situation or in the event that the driver’s behavior needs to be addressed, concludes Mr Greeff.






Prepared and submitted by:

Priyesh Jagjivan

Elvey Security Technologies

Tel: (011) 401 6700

Elvey Marketing