World Cup 2014: Goalline technology TV process reviewed
Fifa is to review how it broadcasts goalline technology decisions after the process caused confusion during a World Cup game between France and Honduras.
GoalControl-4D - how it works
- 14 cameras, seven per goalmouth positioned high around stadium
- All objects within camera range are tracked
- Ball's position is continuously and automatically captured in three dimensions (X-, Y- and Z-coordinates) when close to the goal
- Players and referee filtered out by GoalControl computer system
- System shows the ball's position in 3D to within a few millimetres
- If the ball crosses the goal line, the system sends an encrypted radio signal to the referee's watch in less than one second
- Virtual 3D image of incident from any camera angle can be shown on screen
On Sunday in France's 3-0 win, goalline technology was used for the first time at a Fifa World Cup to aid a decision.
Replays showed a 'no goal' graphic before judging the ball later crossed the line after hitting the goalkeeper.
Honduras coach Luis Suarez and his French counterpart Didier Deschamps were left confused by the process.
"The first replay that was used showed the ball hitting the inside of the post and not fully crossing the line, before the next replay aired seconds later with the animation confirming the ball had fully crossed the line after it had hit the goalkeeper," said a statement from football's governing body.
"In order to ensure maximum clarity in the future for those unfamiliar with GLT, Fifa will review the coverage of this match with the broadcast production team and GoalControl GmbH, to see if any improvements can be made to enhance the viewing experience for fans."
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