1. Slow motion playback
Now this technology is pediatrics, but more than 50 years ago, the camera was still using video tape, let alone slow motion, and it was difficult to go back and replay it.
1963, CBS installed the original replay technology for the first time in the live broadcast of college football. The weight of that equipment was 1300 kg. In this match between the Black Knight of West Point Military Academy and the warrant officer of Naval Academy, the TV station replayed a shot of touchdown, and the commentator also specially explained to the audience: "This is not two touchdowns! But replay! "
Rory Stie Wei Qi's touchdown was the first shot on American football TV. )
Replay technology immediately entered the NFL from the university football field, and derived functions such as freeze frame and slow play. The dynamic and static rhythms of American football switch very quickly, and replay technology allows the essence of this sport to be seen on TV.
In addition, the live broadcast technology directly brought another unexpected technological progress. From 1986, the NFL began to use video playback to assist referees to confirm key decisions, and later it also produced a system for head coaches to challenge decisions. At present, video playback assisted retrial has spread to high-level leagues of tennis, ice hockey, baseball, basketball and other sports.
2. Sky camera
There are two common perspectives of NFL live broadcast. One is shooting from the side of the field, and the two teams confront each other from left to right, similar to football. This kind of lens was shot with the lens in the audience on the side of the venue, which is old-fashioned. The other is often shooting behind the quarterback, similar to the perspective of playing a game. This was shot with a technique called "Sky Camera". The schematic diagram is as follows: In short, it is a rotatable camera, which is pulled by two slide rails at four corners of the height, and can shoot high-speed and accurately at high altitude. Sky camera was first installed by CBS in 1984. At present, basketball, ice hockey, car racing and other sports have adopted this technology.
3. Augmented reality
Many viewers who have just started watching the ball will ask a question, "How did the blue line and the yellow line get up on the NFL live broadcast?" Does this thing exist in reality? "
(CBS broadcasts 20 16/ 17 NFL finals live, and there are virtual lines on the TV screen. )
The core concept of American football is the "number of files" system, which is also difficult for new fans to understand. It would be best if the current file size can be seamlessly transplanted to the field.
The original technology of drawing virtual lines on the site was available at 1978, but CBS at that time felt that the technology was not cost-effective and the time was not mature. 1998, ESPN actually installed this technology, and then several major radio stations followed suit and became the standard. In fact, this technology is not difficult to say. It is to model each stadium in three dimensions, calculate the position of each seat before the game starts, and generate virtual lines in real time during the game.
Now the enhancement technology has become more powerful and can make more special effects, such as visual effects like game interface (the name on Rogers' head and the yellow circle under his feet will follow him); For example, this year's Super Bowl was used to show Matt Ryan's passing rate at different distances: augmented reality technology has also become popular. In the past decade, similar techniques have been used in baseball strike zones, record-breaking routes in car racing and offside scenes in football matches.
4. Pseudoholographic imaging
This Super Bowl has an Intel commercial starring tom brady:
The advertisement is about the playback technology that can pause at any time, rotate at any time and have no dead angle, that is to say, the effect achieved by this technology is similar to the legendary holography. At present, major broadcasting companies have also used this technology. For example, Fox, the broadcaster of the Super Bowl, has it.
In fact, this technology is not real holography, but there are many cameras, and then the parts that can't be photographed by the cameras are supplemented by algorithms to form a holographic feeling. Because of this, this technology can only be used for recording and broadcasting at present.