Why are we switching to digital television?
You may be wondering why we can't have both DTV and the TV system we have now.
Broadcast airwaves have a limited amount of space. Both broadcast and wireless services depend on the use of these airwaves.
Transitioning to digital television technology is much more efficient than the current analog technology. It will allow the broadcast of more program content using less of the broadcast spectrum. This will free up the airwaves for public safety and other new and innovative services for American consumers.
Source:
fcc.gov
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