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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