Tech: A closer look at the NFL's instant replay camera work
History of Instant Replay
Tech: A closer look at the NFL's instant replay camera work
NFL replay reviews, challenges drop with new rules and tech - ESPN
NFL will partner with Hawk-Eye to enhance instant replay capabilities and shorten delays
The NFL has an instant replay camera problem
NFL will partner with Hawk-Eye to enhance instant replay capabilities and shorten delays
Bringing 'The Matrix' to the NFL
Georgia approves use of instant replay for high school football state championship games - High School Football America
Hawk-Eye NFL Football Operations
Instant replay hi-res stock photography and images - Alamy
EDGE Instant Replay System – Sport Scope Video