DirectToAir


Overview


DirectToAir is a software, allowing to create a DVB multiplex from DVI / HDMI / VGA screen capture (with sound) and to broadcast it on a coaxial network according COFDM standard (Dektec modulation card required) or an other standard to fit client needs.

Configuration are done by a simple Windows user interface, according the user to modify some parameters like modulation frequency, encoders bitrate or service description (name, number, PIDs, etc).

Specifications


Inputs


  • DVI / HDMI / VGA
  • Sound card

Processes

  • Underscan
  • Automatic resize
  • Image crop

Video encoder


  • Progressive
  • Ratios 4:3, 16:9
  • PAL and NTSC formats
  • MPEG-2 (SD/HD)
  • H.264 MP (SD/HD)

Audio encoder


  • Mono / Stereo modes
  • 32 KHz / 48 KHz sampling rates
  • MPEG-1 Layer 2, AAC, AAC+, eAAC+

Outputs


IP interface

  • UDP/IP unicast and multicast

COFDM interface (DVB-T)

  • 30-1002 MHz
  • MER > 40 DB, -35..-12 dBm, 75-Ohms "F"

ASI interface (Option)

  • TS-188, EN 50083-9, 75-Ohms BNC

 

References


  • Chooz town hall (Local TV)
  • EMSAT (Auto/Moto timing and paddock diffusion)

Screenshots