Multiroom audio-visual systems give you the ability to watch and listen to whatever you want wherever in your home you choose.
In broad terms, it is useful to think of multiroom solutions as falling into two categories.
Multiroom television systems are primarily designed to allow you to watch television throughout your home by distributing your television aerial (or satellite dish) signal to each room. These systems rely on having a television tuner or satellite receiver in each room. Older televisions will only have built-in analogue tuners capable of receiving the basic 5 channels and these will ultimately have to be replaced (or 'upgraded' by adding a digital set-top box when analogue television is switched off in your area), but at least one television licence covers all of the sets in your home. If you want to distribute satellite signals to different rooms you'll be looking at paying a monthly subscription to Sky for each receiver you possess!
Multiroom audio and video systems are primarily designed to distribute audio and video throughout your home from centrally located hi-fi systems, radio tuners, CD/DVD players and/or media servers. These systems do not distribute television aerial signals around the home (so they are often installed alongside a multiroom television system), but they can distribute the output of a satellite receiver or digital television set-top box (though not currently as a high definition signal).
