In Television
In television broadcasting of sports events, instant replay is often used during live broadcast, to show a passage of play which was important or remarkable, or which was unclear on first sight.
Replays are typically shown during a break or lull in the action; in modern telecasts, it will be the next break, though older systems were sometimes less instant. The replay may be in slow motion, or from multiple camera angles.
Video servers, with their advanced technology, have allowed for more complex replays, such as freeze frame, frame-by-frame review, replay at variable speeds, overlaying of virtual graphics, instant analysis tools such as ball speed or immediate distance calculation. Sports commentators analyze the replay footage when it is being played, rather than describing the concurrent live action.
Instant replays are used today in broadcasting extreme sports, where speed is too high to allow comfortable view for eyes (diving, darts, cricket…), using combination of different advanced technologies (high-speed cameras up to several thousands of frames per second, video servers controlled by special controllers, such Multicam(LSM), which allow to keep recording multiple angles still playing out the action, preventing to miss any new action during replay).
Read more about this topic: Instant Replay
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—New Yorker (April 23, 1990)
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—Susan Sontag (b. 1933)