HDBaseT

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HDBaseT is a connection standard for the transmission of high-resolution multimedia signals .

development

The HDBaseT Alliance was founded in 2009 by LG , Samsung , Sony and Valens Semiconductor . Most well-known AV manufacturers are now members of the HDBaseT Alliance and manufacture devices based on the HDBaseT standard.

properties

The 5Play concept provides the foundation for HDBaseT technology. 5Play includes the

  1. Transmission of uncompressed ultra-HD digital video and audio (2K / 4K / 3D),
  2. 100 Mbit / s Ethernet ,
  3. USB  2.0,
  4. up to 100 W power supply ( PoE ) and
  5. Control signals

via a single network cable (shielded cable Cat.5e , for higher transmission rates Cat.6 or better) up to 100 m in length.

The latest specification of HDBaseT also enables the transmission of audio & video, Ethernet, USB and control signals for even longer distances via fiber optics, so there is no PoE power supply here.

The connection requirements for HDBaseT are different from those for the Cat standards. In contrast to conventional data communication, HDBaseT uses an asymmetrical procedure. The package technology is also structured differently. The plug connections must be as stable as possible and without loose contact. It is not possible to retransmit incorrect bits during a live transmission. In addition, solid copper cables (no strands ) are very important for signal transmission. There are special HDBaseT cables on the market (specific shielding and strength). In addition, the completed installation should be checked with a special HDBaseT measuring device.

Transfers

  • Full HD (2K / 4K / 3D) video, uncompressed (compatible with all HDMI formats and supports all important functions, including EPG, CEC, EDID and HDCP)
  • Multi-channel audio (supports all popular audio formats, including Dolby Digital, DTS, Dolby TrueHD and DTS-HD-Master Audio)
  • Network (10/100 Ethernet)
  • native USB 2.0 (keyboard, mouse, touchscreen function)
  • PoE supply for copper cables (up to 100 watts)
  • Control signals (IR, CEC, RS-232 bidirectional)

Advantages of HDBaseT

  • Inexpensive cable / installation
  • Easy wiring
  • 5Play: Video, audio, Ethernet, USB 2.0, power supply and control signals via a single cable
  • Uncompressed signal transmission (no loss of quality)
  • Extremely low latency (but higher than SDI )
  • Industry standard, but not in the field of professional event technology and TV

Disadvantages of HDBaseT

  • Expensive devices (Compared to SDI )
  • EDID negotiation of resolution / frame rate
  • not compatible with broadcast equipment
  • Cable length must not be longer than 100 m
  • high license costs for device manufacturers

installation

Many manufacturers are already installing an HDBaseT connection as standard in their devices (projector, Blu-ray, AV amplifier, etc.). Depending on the manufacturer, the connection is not labeled with HDBaseT and does not cover the entire 5Play concept.

The HDBaseT certification only guarantees the basic HDBaseT function of AV transmission.

If the devices already have an HDBaseT connection, the devices can simply be connected using a shielded Ethernet cable. The HDBaseT connection must then be selected as the input on the receiving device, and settings for the signal may be necessary on the output device. If one of the devices does not have an HDBaseT connection, that is not a problem. Meanwhile, there are send and receive boxes from many manufacturers with HDMI / Displayport / VGA / Composite and other inputs / outputs that function as signal converters. There are also media switches with all sorts of additional functions.

Fixed cables are wired in accordance with TIA-568B , patch fields and switches must not be in the line.

Alternatives

  • SDI (Broadcast Standard)
  • HDBitT (like HDBaseT, but open standard, uses Ethernet)
  • NDI (network-based video transmission, both devices and software)
  • HDMI
  • DiiVA

Web links