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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 ...
In this case, data is broadcast to all receivers but only addressed to a specific group. The concept of interactive multicast, for example using IP multicast, may be used over TV broadcast networks to improve efficiency, offer more TV programs, or reduce the required spectrum. Interactive multicast implies that TV programs are sent only over ...
A list of these terms can be found at List of broadcasting terms. [19] Television and radio programs are distributed through radio broadcasting or cable, often both simultaneously. By coding signals and having a cable converter box with decoding equipment in homes, the latter also enables subscription-based channels, pay-tv and pay-per-view ...
Many PBS member stations around the United States broadcast their main channel in high definition and up to three standard definition subchannels; however, a few reconfigure their digital channels depending on daypart, carrying four standard definition channels during the daytime, reducing them to one HD and one SD channel at night due to ...
Public broadcasting (or public service broadcasting) involves radio, television, and other electronic media outlets whose primary mission is public service.Public broadcasters receive funding from diverse sources including license fees, individual contributions, public financing, and commercial financing, and claim to avoid both political interference and commercial influence.
The U.S. government operates some limited direct broadcasting services, but all are either highly specialized (and, since the dawn of the millennium, automated) information services (WWV/WWVH time service, NOAA Weather Radio) or targeted at foreign audiences like Voice of America.
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 ...
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]