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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.
Cable radio: Cable radio providers include Music Choice, Muzak, DMX, Sonic Tap and Canada-based Galaxie. CRN Digital Talk Radio Networks specialize in talk radio. [6] Satellite radio: Direct-to-consumer satellite radio broadcasting was introduced in the United States in 1997; there is only a single provider, SiriusXM. Technical operations are ...
After a series of extensions and modifications, KWVR-FM finally received its license to cover from the FCC on January 19, 1988. [8] In December 2008, the Wallowa Valley Radio Broadcasting Corporation agreed to transfer the license for this station to Wallowa Valley Radio, LLC, for a cash sale price of $650,000.
Radio stations can be linked in radio networks to broadcast common radio programs, either in broadcast syndication, simulcast or subchannels. Television broadcasting (telecast), experimentally from 1925, commercially from the 1930s: an extension of radio to include video signals.
The extended mediumwave broadcast band, commonly known as the AM expanded band, refers to the broadcast station frequency assignments immediately above the earlier upper limits of 1600 kHz in International Telecommunication Union (ITU) Region 2 (the Americas), and 1602 kHz in ITU Regions 1 (Europe, northern Asia and Africa) and 3 (southern Asia and Oceania).
The three commercial operators - DBC HK (Digital Broadcasting Corporation Hong Kong Ltd, formerly Wave Media), Metro Broadcast and Phoenix U Radio discontinued their services during 2015 to 2016 due to low revenue from advertisements, mostly attributed to the small audience of digital broadcasting in Hong Kong. [67]
FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong , wide-band FM is used worldwide to transmit high-fidelity sound over broadcast radio . [ 1 ]
Also AM radio or AM. Used interchangeably with kilohertz (kHz) and medium wave. A modulation technique used in electronic communication where the amplitude (signal strength) of the wave is varied in proportion to that of the message signal. Developed in the early 1900s, this technique is most commonly used for transmitting an audio signal via a radio wave measured in kilohertz (kHz). See AM ...