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2. Terrestrial television - Wikipedia

   en.wikipedia.org/wiki/Terrestrial_television

   Terrestrial television, or over-the-air television (OTA) is a type of television broadcasting in which the content is transmitted via radio waves from the terrestrial (Earth-based) transmitter of a TV station to a TV receiver having an antenna.

3. List of United States over-the-air television networks

   en.wikipedia.org/wiki/List_of_United_States_over...

   Through the use of multicasting, there have also been a number of new Spanish-language and non-commercial public TV networks that have launched. Free-to-air networks in the U.S. can be divided into five categories: Commercial networks – which air English-language programming to a general audience (for example, ABC, CBS, NBC, and Fox);

4. Digital television in the United States - Wikipedia

   en.wikipedia.org/wiki/Digital_television_in_the...

   High definition—1080p (only used by a few cable operators and some terrestrial stations broadcast in 1080p) Most digital television sets sold in the U.S. use a display with a 16:9 aspect ratio to optimally display HDTV-formatted content. Lower-resolution sources like regular DVDs may be upscaled to the native resolution of the TV.

5. List of DTT channels in the United Kingdom - Wikipedia

   en.wikipedia.org/wiki/List_of_DTT_channels_in...

   This is a list of the current channels available on digital terrestrial television (DTT) in the United Kingdom, and those that have been removed.. Almost all channels broadcast on DTT are free-to-air, with a limited number of subscription channels (requiring a subscription to a pay-TV package) and pay-per-view channels (requiring a one-off payment to view an event) also available.

6. Digital terrestrial television - Wikipedia

   en.wikipedia.org/wiki/Digital_terrestrial_television

   Digital terrestrial television is transmitted using radio frequencies through terrestrial space in the same way as the former analog television systems, with the primary difference being the use of multiplex transmitters to allow reception of multiple services (TV, radio stations or data) on a single frequency (such as a UHF or VHF channel).

7. Free TV Networks - Wikipedia

   en.wikipedia.org/wiki/Free_TV_Networks

   Free TV Networks is an American specialized digital multicasting and advertising-supported video on demand network media company. The company owns and operates three broadcast television networks. The company was founded and is led by broadcasting veteran Jonathan Katz, who previously launched what is now the Scripps Networks division of ...

8. List of United States pay television channels - Wikipedia

   en.wikipedia.org/wiki/List_of_United_States_pay...

   The scope of this list is limited to channels broadcast via Cable, Satellite or Terrestrial providers only and does not include channels streamed exclusively online. This list may be incomplete and uses limited sources relative to the 2,675 [ 1 ] TV providers in the United States.

9. Free-to-air - Wikipedia

   en.wikipedia.org/wiki/Free-to-air

   Free-to-air (FTA) services are television (TV) and radio services broadcast in unencrypted form, allowing any person with the appropriate receiving equipment to receive the signal and view or listen to the content without requiring a subscription, other ongoing cost, or one-off fee (e.g., pay-per-view).