Search results
Results from the WOW.Com Content Network
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 ...
Non-broadcast content, subscription television channels or datacasting operations unrelated to the main television programming are also permitted by the digital television standards but are less-commonly used. USDTV was an over-the-air pay television service that used H.264 compression instead of standard MPEG-2.
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.
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.
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 ...
The field of broadcasting includes both government-managed services such as public radio, community radio and public television, and private commercial radio and commercial television. The U.S. Code of Federal Regulations, title 47, part 97 defines broadcasting as "transmissions intended for reception by the general public, either direct or ...
Narrowcasting is the dissemination of information to a specialised audience, rather than to the broader public-at-large; it is the opposite of broadcasting.It may refer to advertising or programming via radio, podcast, newspaper, television, or the Internet.