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Outside broadcasting
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Outside broadcasting

Exterior of a 1 TV - Mobil 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. The mobile production control room (PCR) is known as a "production truck", "Scanner" (a BBC term), "mobile unit", "remote truck", "live truck", "OB Van" or "live eye". In the United States an "OB Van" is smaller in size than a production truck and generally require two or three people in the field to manage. For instance broadcast journalism news reporters providing live television, local news in the field outside a formal television studio.



A typical OB Van is usually divided into 5 parts.

  • Parts of the television crew are located in the first and largest part is the video production area. The Television director, Technical director, assistant director, character generator (CG) operator and television producers usually sit in front of a wall of video monitors. The Technical director sits in front of the video switcher. The video monitors show all the video feeds from various sources, including computer graphics, professional video cameras, video tape recorder (VTR), video servers and slow-motion replay machines. The wall of monitors also contains a preview monitor showing what could be the next source on air (does not have to be depending on how the video switcher is set up) and a program monitor that shows the feed currently going to air or being recorded. The (keyed dirty feed with digital on-screen graphic) is what is actually transmitted back to the central studio that is controlling the outside broadcast. A clean feed (without the graphics) could be being sent to other trucks for use in their production. The video switcher is usually operated by 1 person called the Technical Director (TD). and is responsible for switching the video sources to air as directed. Behind the directors there is usually a desk with monitors for the editors to operate. It is essential that the directors and editor are in communication with each other during events, so that replays and slow-motion shots can be selected and aired. The "production room" in most sporting events has a graphics operator and sometimes a font coordinator who are in charge of the graphics, statistics, and the showing of the names of commentators or the players to be shown on air. Most sports also have a "box or bug box operator" who controls the graphic seen either on the bottom or top of the screen that controls the score as seen at home. These operators can also show on air stats, controls the clock, and many times also is in charge of showing sponsors during play.
  • The second part of a van is where the audio engineer has an audio mixer (being fed with all the various audio feeds: reporters. commentary, on-field microphones, etc. The audio engineer can control which channels are added to the output and follows instructions from the director. They relay the information from producers and directors to their A2's who typically set up the audio cables and equipment throughout the arenas and the booth where the commentators sit. The audio engineer normally also has a dirty feed monitor to help with the synchronization of sound and video.
  • The 3rd part of the truck is the VTR area. The tape area has a collection of machines including video servers and may also house additional power supplies or computer equipment. The "tape room" has EVS (or LSM) operators who have one or more cameras that go into their machines and can be played back for replays when an exciting or important play occurs during the game. EVS operators also play replay rollouts that lead into commercial breaks or show the highlights of the event at the end of play. These operators also can play back in slow motion or pause to show a key part of the action.
  • The 4th part is the video control area where the professional video cameras are controlled using camera control units (CCU) by one or two operators, to make sure that the iris is at the correct exposure and that all the cameras look the same. These operators can shade, balance, and focus the cameras from this position inside the truck. This area is controlled by an operator called a V1 and depending on the size of the show and/or the broadcast company may have a V2.
  • The 5th part is transmission where the signal is monitored by and engineered for quality control purposes and is transmitted or sent to other trucks. The transmission is monitored by the truck engineers to ensure the people at home have a good picture and a high quality signal output.


Image:FOX news trucks Harvard Square 050429.jpg|FOX 25 trucks in Boston's Harvard Square Image:Outside broadcast van.jpg|A BBC Radio outside broadcasting van at New College, Oxford Image:OB Under Construction.jpg|A CBS Sports remote production unit being fabricated in Pittsburgh PA Image:TVN24 van satellite Mercedes.jpg|A TVN24 outside broadcasting van in Poznan, Poland Image:OB_suite-tennis.JPG|OB for tennis tournament: Extendible-sided production van, satellite dishes, generator truck; see two OB cameras and three announcing booths at top of stadium beyond. Kooyong, Victoria, Australia, 2008 Image:Arena_OB7.JPG|Arena Television OB8 working for the BBC at Wimbledon Tennis Championships, UK Image:Wimbledon_OB.JPG|Inside Arena Television OB7's production gallery at the Wimbledon Tennis Championships, UK Image:Camera 3_England_v_Czech_Republic_Wembley.jpg|Arena Television covering an England match at Wembley Stadium, UK Image:Virginradioatv2006.jpg|Virgin Radio OB studio at V 2006 Image:Virginradioobstudio.jpg|Klotz Digital's Vadis DC II mixer for use at a Virgin Radio outside broadcast at the V Festival 2007


Costs depend on the size and options of the outside broadcast vans ordered.

See also


ar: de: bertragungswagen fr:R gie (spectacle) lt:Kilnojama televizijos stotis ja: no:OB-buss pl:W z reporterski fi:Ulkotuotantoauto sv:OB-buss

Source: Wikipedia | The above article is available under the GNU FDL. | Edit this article

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