Goal-line technology (GLT) was on show at the Maracana Stadium in Rio de Janeiro today as FIFA and GoalControl GmbH held a media event to demonstrate how the technology works.
Members of the media from around the world had an opportunity to see the GoalControl-4D technology in action, including wearing the referee watch to receive the indication of “Goal” or “No Goal”, which is immediately confirmed within one second as part of the requirements of the International Football Association Board (The IFAB) who approved the principle of GLT in July 2012.
The GoalControl-4D system is equipped with 14 high-speed cameras located around the pitch, with seven cameras focussing on each goalmouth. Using a special detection software, the ball is filtered out from the image sequences and its real-time position is automatically calculated as X, Y and Z coordinates as well as speed, making it 4D. If the ball has fully crossed the goal-line, the central processing unit automatically sends an encrypted radio signal to the referee’s watch in less than one second indicating a goal by means of vibration and a visual signal.
The GLT media event followed on from the referees training session on Saturday, 7 June, also at the Maracana, which FIFA organises to ensure that all match officials are comfortable with the technology and to explain the pre-match procedure in more detail. The general functionality and accuracy of the system and in particular the mandatory referee check were important parts of this training.
Source: fifa.com