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A television broadcaster or television network is a telecommunications network for the distribution of television content, where a central operation provides programming to many television stations, pay television providers or, in the United States, multichannel video programming distributors.
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]
High-definition television: Broadcasting using a line standard of 720 or greater. Prior to World War II, high definition meant a line standard greater than 240 lines. A CB radio with an exposed helical "rubber ducky" antenna. helical antenna A radio antenna with one or more conductive wires, wound up in the shape of a helix. A version of this ...
DuMont Television Network (1948–1956) and NTA Film Network (1956–1961) were early attempts at a "fourth network". Fox, built partly on the remnants of DuMont, is a relative newcomer that began operations in 1986 and expanded its programming through the 1990s. The Paramount Television Network flourished simultaneously with Fox, if less ...
A cable channel (sometimes known as a cable network) is a television network available via cable television. Many of the same channels are distributed through satellite television . Alternative terms include non-broadcast channel or programming service , the latter being mainly used in legal contexts.
For most of the history of television in the United States, the Big Three dominated, controlling the vast majority of television broadcasting. [8] DuMont ceased regular programming in 1955; the NTA Film Network, unusual in that its programming, all pre-recorded, was distributed by mail instead of through communications wires, signed on in 1956 and lasted until 1961.
A digital multicast television network, also known as a diginet or multichannel, is a type of national television service designed to be broadcast terrestrially as a supplementary service to other stations on their digital subchannels. Made possible by the conversion from analog to digital television broadcasting, which left room for additional ...
Multichannel television in the United States has been available since at least 1948. The United States is served by multichannel television through cable television systems, direct-broadcast satellite providers, and various other wireline video providers; among the largest television providers in the U.S. are YouTube TV, DirecTV, Altice USA, Charter Communications (through its Spectrum ...