martes, 24 de noviembre de 2009

Advantages and disadvantages

Advantages:

  • Digital reception tends to be better overall, particularly with a good signal. With a weaker signal there is little perceptible difference, in fact analogue can be better.
  • It is easier to obtain the optimum digital picture than the optimum analogue picture.
  • Many more channels can fit on the digital transmission.
  • Interactive (red button) services can be provided.

Disadvantages:

  • New equipment (Set-top box) may be required.
  • Increased electricity consumption by the digital receiving equipment.
  • An upgraded antenna installation may be required.
  • Analogue requires lower signal strength to get a watchable picture. By extension, digital does not degrade as gracefully as analogue. For example, with low signal strength an analogue picture gets fuzzy (but is still viewable) while a digital picture freezes and stops updating.
  • Switching channels is slower because of the time delays in decoding digital signals.
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