In television technology, clean feed is a term that describes a signal which has not come from the main output of the Video switcher, such as the output of a vision mixer

Vision mixer

A vision mixer is a device used to select between several different video sources and in some cases Compositing video sources together to create special effects...

 before the downstream keyer stage - the clean feed is identical to the main program output but without any captions keyed into it.

The clean feed signal is used in sport production to allow different television station

Television station

A television station is a business, organisation or other such as an amateur television operator that transmits content over terrestrial television. A television transmission can be by analog television signals or, more recently, by digital television. Broadcast television systems standards are...

s to key its own digital on-screen graphic

Digital on-screen graphic

A digital on-screen graphic is a watermark-like station logo that many television broadcasters overlay over a portion of the screen-area of their programs to identify the channel...

 image on a common signal, or in news broadcasting to produce two or more different streams, each one with the same picture but in different languages.

Modern production equipment can actually put different keys on multiple outputs, allowing them to go to the clean feed or not. The most sophisticated vision mixers (or production switchers, according to the American nomenclature) can generate a clean feed output for any of their Mix/Effects (ME) bus.

The term "clean feed" is also used to refer to backhaul feeds of television programming sent via communication satellite or other transport (such as a national fiber-optic network) sent from another TV station or remote television production truck

Production truck

Television Production trucks were developed to take television studios on the road so video productions could be made at distant locations for a remote broadcast, outside broadcasting , electronic field production with multiple-camera setup and a support of a number of different technologies to...

 on-location, which does not carry any television advertisement

Television advertisement

A television advertisement or television commercial, often just commercial, advert, ad, or ad-film – is a span of television programming produced and paid for by an organization that conveys a message, typically one intended to market a product...

s or break bumpers, or in some cases, lower-third graphics or superimposed chyron

Chyron

Chyron may refer to:*Lower third, television graphics that occupy the lower area of the screen*Chyron Corporation, develops and manufactures on-screen graphics for the broadcast industry...

text.