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The broadcast signal can be either analog (signal is varied continuously with respect to the information) or digital (information is encoded as a set of discrete values). [18] [19] Historically, there have been several methods used for broadcasting electronic media audio and video to the general public:
A terrestrial network (or broadcast network in the United States) is a group of radio stations, television stations, or other electronic media outlets, that form an agreement to air, or broadcast, content from a centralized source. [1]
Educational and other non-commercial broadcast networks – which air English- and some foreign-language television programming, intended to be educational in nature or otherwise of a sort not found on commercial television (for example, PBS); Religious broadcast networks – which air religious study and other faith-based programs, and in some ...
For example, the Internet includes blogs, podcasts, web sites and various other technologies built atop the general distribution network. The sixth and seventh media, Internet and mobile phones, are often referred to collectively as digital media; and the fourth and fifth, radio and TV, as broadcast media.
Radio broadcasting is the broadcasting of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast by a satellite in Earth orbit.
An established phone call is an example. A broadcast channel is a channel that provides a broadcasting service, i.e. that sends data addressed to all users in the network. Cellular network examples are the paging service as well as the Multimedia Broadcast Multicast Service.
U.S. Agency for Global Media [8] [disputed (for: conflict between sources - also listed on list of state media by country) – discuss] Voice of America (1942) [62] Radio Free Europe/Radio Liberty (RFE/RL) Current Time TV; Radio Free Asia (RFA) Middle East Broadcasting Networks. Alhurra; Radio Sawa; Office of Cuba Broadcasting (Radio y ...
NBT Regional 11 (Separate broadcasting on 4 areas but HD only Central Area TV Program Chart) NBT World (owner by National News Bureau of Thailand and since 2022 to present broadcast only on Internet TV [29]) Bangkok Broadcasting & Television Company Limited Channel 7 (7 HD) Ministry of Education (through the Department of Learning Encouragement)