Broadcasting
Related: mass media - radio - television
Definition
Broadcasting is a method of transmitting radio, internet or television signals (programs) to a number of recipients ("listeners" or "viewers") that belong to a large group. This group may be the public in general or a relatively large audience within the public in general. Thus an internet channel may distribute text or music world-wide, while a public address system in (say) a workplace may broadcast very limited ad hoc soundbites to a small population within its range.
Television and radio programs are distributed through radio broadcasting or cable, often both simultaneously. By coding signals and having decoding equipment in the homes, the latter also enables subscription based channels and pay-per-view services.
A broadcasting organisation may broadcast several programs at the same time, through several channels (frequencies), for example BBC 1 and 2. On the other hand, two or more organisations may share a channel and each use it during a fixed part of the day.
Broadcasting forms a segment of the mass media. --http://en.wikipedia.org/wiki/Broadcasting
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