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Decibel Engineering

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dVMo Traincam - Platform and Track to Train Video


Whilst station platforms are often covered by surveillance cameras, the images are generally available only within the station and not to the driver or guard of a train. On approaching the station they may have no idea of the conditions at the platform and even whilst stationary this information is not generally available.

With TrainCam this changes. Video from the existing platform camera system can be transmitted directly to a monitor in the cab or guard's compartment allowing them a real-time picture of the platform and track environment; on approach, whilst stationary and on departure.

TrainCam is based on the very successful dVMo platform first developed for use by police, emergency services and military arequiring the ability to provide real time video and surveillance links to and from a moving vehicle or aircraft.

TrainCam is an extension of that capability to the railway environment.

Requiring no operator intervention, TrainCam provides SD (DVD) quality video images and operates independently of any other radio or wireless technologies that may be in use. It is equally applicable to large and small stations with single or multiple platforms and is not dependent on the availability of 3G or other carrier-provided services.

Multiple transmit antennas and diversity receive antennas provide robust operation in tunnels and underground environments and seamless coverage between tunnel and platform..

Key features of the TrainCam are : -

  • True "wire-less" rugged video link originally designed for emergency services applications and which operates competely independently of telco 3/4G and other bearer services
  • Over-air Coded Orthogonal Frequency Division Multiplex optimised to minimise the effects of multi-path RF signals in difficult environments like stations and tunnels
  • Full SD Frame rate and 50ms video latency enable "real-time" viewing and high levels of Forward Error Correction (FEC) ensure high picture quality maintained
  • Maximum Ratio Combining (MRC) receiver system using 2 antennas providing spatial diversity enabling greater range to be achieved down the tunnel
  • Multiple video capability over single RF channel allowing single transmitter per station (up to 4 videos). The control system will tell the receiver which video to decode when approaching station. This eliminates any platform-to-platform RF problems and reduces the number of frequencies required in more complex station environments
  • works with existing video multiplex equipment
  • Encrypted link for security
  • Frequency agile Transmitter and Receivers enabling frequency re-use
  • Sophisticated RF distribution system with multiple transmit antennas ensuring seamless coverage down tunnels and on platform. Power control available enabling low power operation when no trains present
  • Control system allowing for adjacent platform working, end-of-line station handling etc to ensure full coverage of all platforms
  • Proposed equipment used by Law Enforcement, military and Unmanned Aerial Vehicles so proven rugged technology
  • Upgrade paths for additional videos and other services (audio, serial data and IP) across the same link and an HD video upgrade path for future-proofing of the equipment
  • No degradation of RF link performance in dirty environment
  • Download the TrainCam Data Sheet > two pages (160kB pdf format)