A television channel is an organization which diffuses televised programs.

In the beginning, the expression “chains” refers to the whole of the transmitting which made it possible to transmit the same program simultaneously. Today, a television channel has as an essential activity the production and the diffusion of televised programs. One generally distinguishes three great trades related to this activity, which can be consequently assured company or entrusted to partners:

• the editor of services, who produces, realizes or proposes contents to be diffused;
• the diffuser, which places at the disposal of the public programs, in particular by hertzian way, satellite, by cable or by the means of a network of cable television;
• the operator of network, which ensures the technical operations related on the transmission and the diffusion of the programs near the public.

A television channel can play these three parts when it produces emissions or telefilms, that it diffuses them and that it ensures the technical management of its network.

Technical evolutions

The development of the television channels is directly related to the installation of networks of terrestrial diffusion being pressed on transmitters to cover specific zones.

The arrival of novel modes of diffusion as the cable, the satellite, ADSL and TNT gave rise to new chains and to the use of novel methods. Until the end of the years 1980, the televised transmissions were Analogique S (hertzian diffusion of continuous and modulated electrical signals). Since a few years, the recourse to technologies Numerical S.A. improved quality of the images recorded, transmitted and delivered.

Statute

In Europe, the television channels are managed by privately held companies, associations or depend on the Public service.

In France, the television channels are subjected to a mode of authorization arbitrated by the Superior council of audio-visual the (SCUMS).

See too

• List of television channels
• Television
• Television in France and History of French television

Random links:

Championship of Sudan of football | Zek | The Canadian Encyclopedia | David Nolan | Ethyl plant oil esters