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DirectToAir

Overview

DirectToAir is an equipement, allowing to create a DVB multiplex from SD-SDI sources (PAL or NTSC) and to broadcast them on a coaxial network according COFDM standard (or an other standard to fit client needs).

The system is fully autonomous, it encodes audio and video streams directly extracted from SDI signal and encapsulates them in an MPEG-2/TS stream, so it does not need any supplemental encoding devices. Configuration and supervision are done by a simple web browser, according the user to modify some parameters like modulation frequency, encoders bitrate or service description (name, number, PIDs, etc).

Specifications

SDI inputs

Signal
  • SMPTE 259M-C (270 Mbps) with embedded audio (SMPTE 272M)
  • 4 x 75 Ohms BNC
  • PAL / NTSC (4:2:2 10-bits)

Processes

  • Scroll text over the video
  • Failsage image when signal is lost

Encoders

Vidéo
  • MPEG-2 4:2:0 MP@ML
  • 1.5 .. 10 Mbps
  • Aspect ratio 4:3, 16:9

Audio

  • MPEG-1 Layer II
  • 32 .. 384 Kbps
  • 48000 Hz, stereo

Physical inputs

  • IP (UDP/IP, Multicast)

Outputs

COFDM interface (DVB-T)

  • Signal EN 300 744
  • 75 Ohms F female connector
  • Frequency range : 36 .. 1002 MHz
  • Output level : -35 .. -12 dBm

ASI interface (Option)

  • Signal EN 50083-9
  • Up to 214 Mbps

Physical Specifications

  • Power consumption 350 W
  • Redundant Power Supply, hot-plug (800 Watts)
  • Dimensions (LxHxP) 43.4 cm x 4.3 cm x 61.3 cm
  • EIA Standard mounting 19” rack, 1-RU

References

  • France 3 Marseille (Internal network)
  • France 3 Ajaccio (Internal network)
  • Chooz town hall (Local TV)

Screenshots