Outside broadcasting (OB) is the electronic field production (EFP) of television or radio programmes (typically to cover television news and sports television events) from a mobile remote broadcast television studio. Professional video camera and microphone signals come into the production truck for processing, recording and possibly transmission.
Outside broadcasts have been taking place since the late 1920's. The first large-scale outside broadcast was the televising of the Coronation of George VI and Elizabeth in May 1937, done by the BBC's first Outside Broadcast truck, MCR 1 (short for Mobile Control Room).
In the past many outside broadcasting applications have relied on using satellite uplinks to broadcast live audio and video back to the studio. While this has its advantages such as the ability to set up anywhere covered by the respective geostationary satellite, satellite uplinking is relatively expensive and the round trip latency is in the range of 240 to 280 milliseconds.
As more venues install fiber optic cable, this is increasingly used. For news gathering, contribution over public internet is also now used. Modern applications such as hardware and software IP codecs have allowed the use of public 3G/4G networks to broadcast video and audio. The latency of 3G is around 100–500 ms, while 4G is less than 100 ms.
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- "TV OUTSIDE BROADCAST HISTORY". TV Outside Broadcast History. Retrieved 2018-05-28.
- Webb, Dr Alban. "1948 London Olympics". History of the BBC. BBC. Retrieved 16 November 2019.
- "The Coronation and The BBC". About the BBC Blog. BBC. 28 May 2013. Retrieved 16 November 2019.
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|Wikimedia Commons has media related to Outside broadcasting.|
- Recreation of a full 1970s BBC Outside Broadcast production
- Technical planning stage of a 1970s Outside Broadcast production
- Demonstration of the 'lining up' process for EMI 2001 OB camera from the 1970s
- Discussion and demonstration of the microphone and communications set up for a sports OB
- BBC Outside Broadcast crew reflect on their careers in OB production
- TV Outside Broadcast History Website