Glossary: H


HDMI is generally considered as the successor to the SCART interface. It is an emerging fully digital connection that is based on the same fundamental technology as DVI and enjoys extremely broad industry support.

The advantages of HDMI are:

  • HDMI has an extremely high bandwidth making it future-proof and suited for applications beyond HDTV.
  • A single cable is used for transferring all uncompressed Video and Audio Information from a STB (Set-Top-Box) to a display.
  • The fact that HDMI carries uncompressed video guarantees the highest possible picture quality.
  • HDMI gets rid of unnecessary Analog to Digital and Digital to Analog Conversions.
  • HDMI replaces all current audio / video cables between different A/V components by a single cable: this simplifies connections and clears up the cable mess generally associated with A/V setups.
  • HDMI provides a content protection technology called HDCP (High-bandwidth Digital Content Protection) securing the link between different HDMI components.
  • HDMI supports an integrated consumer electronics control protocol (CEC), which allows controlling all A/V components through a single remote control.
  • HDMI is fully compatible with DVI-HDCP and allows DVI components to be connected to HDMI displays through a simple passive cable adapter. HDMI components can also be connected to DVI-HDCP displays.
  • HDMI has a small connector, which is pin compatible to DVI but in addition to DVI carries digital multi-channel audio

SES ASTRA and its industry partners recommend a High Definition Digital Interface to be provided on both DVB High Definition IRDs and High Definition Displays. This interface needs to be HDCP compliant.

For more information please consult:



High-definition TV

HDTV offers up to five times the picture resolution of standard definition (SD) television. Picture resolution is a measure of picture quality and refers to the number of lines and number of pixels per line in the TV picture.

Ordinary SD pictures are broadcast at 720 x 576 pixels, whereas HD pictures can be up to 1920 x 1080 pixels. This means superior picture quality and detail, and more life-like and vivid colours.


HD Benefits

  • up to 5 times more picture information than ordinary TV
  • cinema-style 16:9 widescreen aspect ratio
  • high-quality 5.1 Dolby Digital surround sound
  • multichannel audio for different languages
  • extended potential for computer game graphics and sound

HD Screen Specifications

DIGITALEUROPE specifies the following minimum technical specifications for 1080p HDTV-ready displays:

  • minimum resolution of 1080 lines and a minimum of 1920 horizontal pixels
  • HD input via analogue YPbPr and DVI or HDMI
  • the digital HD-capable DVI or HDMI input accepts these HD formats:
    • 1280x720 @ 50 & 60 Hz progressive - 720p
    • 1920x1080 @ 50 & 60 Hz interlaced - 1080i
    • 1920x1080 @ 24, 50 & 60 Hz progressive - 1080p
  • the digital HD-capable DVI or HDMI input supports HDCP content protection




The band used for satellite transmission from 11.70 GHz to 12.75 GHz. The ASTRA Satellites system uses this band to transmit digital services only.

Home cinema system

A TV and audio system designed to create a cinema-style experience in the home.


The central earth station where all data from a satellite communications network is collected and redistributed.