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HDMI – High-Definition Multimedia Interface


An interface used to transfer high definition video and audio over a single cable.

The most commonly used interface cable for TVs, DVD players, gaming machines and becoming the standard on most laptops and PCs.

Advantages of HDMI

  • Higher Quality: HDMI enables loss-less transmission and better-quality video at low brightness scenes at higher resolutions.
  • Intelligence: Two-way communications between video sources are enabled by HDMI Interface, which enables automatic configuration (between 480p or 720p, 16:9 or 4:3 for example)
  • Deep Colours: HDMI supports 10-bit, 12-bit and 16-bit (RGB or YCbCr) colour depths
  • No Compression: Since HD signals are not compressed while transmission, there is no de-gradation in signal quality
  • Encryption: Devices are authorised to receive the content sent by the HDMI enabled sources. They ensure people cannot access content for piracy
  • Single Cable Solution: Just one cable carries audio and visual, meaning less integration issues
  • DVI compatible: HDMI is backward compatible with DVI meaning DVI enabled devices can send HD content to displays
  • DisplayPort compatible: Parallel technology so compatible with each other.
  • Multiple video and audio formats: A wide array of compatability

Disadvantages of HDMI

  • Signal Limitations: Although cable length for HDMI varies, it is still not recommended to use a cable more than 50m in length as this could result in loss of signal.
  • Blank screen syndrome: Authenticaion delays can lead to blank or flashing screens
  • More expensive: cost per meter is more expensive than analog alternatives

HDMI interface

Commonly found in laptops and desktop computers