Features

• An aggregator box converts the information data (sent by the camera encoders) into modulated audio which is further conveyed to the corresponding computer system. All the data is synchronised with the host camera and is then demodulated into digital data for the software program that draws the virtual yellow line on the first Down position.
• The cameras used in the system are "instrumented cameras" that have electronic encoders with the help of which, live data is forwarded to the broadcaster's truck for further processes. Due to this element, the yellow line is fixed at the same place even when the cameras follow players or the ball. In some games, skycams are also used in this graphical technology.
• The system comprises a combination of motion sensors that are linked with the cameras (the number of cameras varies according to the sport played) to record the game.
• Chroma Keying computers are also involved in this system that provides colours to the scene such as the colour of grass etc.
• Ideally, a total number of four computers are used in the system, each linked with a camera and the fourth one is the shared computer.
• The position of the cameras is set in conjunction with the predefined 3D model of the playground.
• The basic idea of inventing this system is to signify the Down position for the TV viewers so that they can better judge the game.

Gallery

Photo Credits: twitter.com

Credits: YouTube