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The question shouldn't need to be debated in the next five weeks in Brazil, where goal-line technology will be used for the first time in a World Cup. Fourteen cameras -- seven trained on each goalmouth -- have been hung up in all 12 World Cup stadiums. The cameras will record 500 images per second, and a computer will digest the frames. Within a second of a ball crossing the line, the referee's special watch will vibrate and flash "GOAL". Different types of goal-line technology have already been used in club football, including the Hawk-Eye system in the Premier League this past season. Holzmuller said the GoalControl system had proved reliable, even if several of its seven cameras were blocked by players.
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