What are the high technologies in NFL?

As the leading professional sports league in North America, NFL has been very active in adopting new technologies. Take the simplest example: for more than 100 years, head protection has evolved from the simplest leather hat to a composite helmet with a shock absorbing liner. The following is mainly about the technical progress related to TV broadcasting, because the major TV stations that provide funds for NFL are after World War II. 1. Slow lens replay is now a pediatrics technology, but the camera used video tape more than 50 years ago. Let alone slow lens, it is very difficult to replay it backwards. In 1963, CBS first installed the original replay technology in the college football live broadcast, and the device weighed 1300 pounds. In the match between the Black Knight of the West Point Military Academy and the brigadier of the Naval Academy, the TV station replayed a scene of reaching the array. The commentator also specially explained to the audience: “this is not twice reaching the array! It’s a replay! “

Replay technology immediately entered NFL from the university football field, and derived freeze frame, slow play and other functions. Rugby moves quickly and rhythms, and replay technology makes the essence of this sport available on TV. In addition, live broadcast technology also directly brings another unexpected technological progress. Since 1986, the NFL has used video playback to assist referees in confirming key decisions, and later developed a system for coaches to challenge decisions. At present, video playback assistance has spread to the high-level leagues of tennis, ice hockey, baseball, basketball and many other sports. 2. The most common live broadcast of NFL with sky camera is from two perspectives. One is the side shot of the field. The two teams fight left and right, similar to football. This kind of lens is shot from the side audience of the venue, which is more old-fashioned: