What is a Freeview multiplex?
Digital TV services (or channels) are grouped together in multiplexes. A multiplex consists of a stream of digital information containing, among other things, a mixture of the sound and pictures from a number of services. They can contain both TV and radio.
Packing services together makes very efficient use of transmission resources. UK transmitters have up to 6 multiplexes which between them contain dozens of TV and radio services. This type of packaging wasn't possible with analogue TV which is why we only had 5 channels before the advent of digital TV. The recent increase in TV services, with huge variety of consumer choice, has only become possible because of digital multiplexing.
If you wish to know which services are on which multiplex, visit the Digital TV Group web page on multiplex configurations.
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