The FIFA Confederations Cup, which kicks off in Brazil on Saturday, will be the first major international competition to use goal-line technology.
Every stadium will be equipped with 14 high-speed cameras to ensure accuracy throughout the event.
Fifa marketing director Thierry Weil announced on Friday that the camera-based system was designed as a support for referees, who will receive a signal on a wristwatch when the machine registers a goal.
The eight-nation tournament gets under way on Saturday with Luiz Felipe Scolari’s men facing Asian Champions Japan in Brasilia.
The Selecao have won both of the last two editions in 2005 and 2009, as well as the 1997 competition.