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|CED in the History of Media Technology|
Disk recording of broadcast video was first tested in a CBS football broadcast on July 8th, 1965. Because of the extreme storage requirements this was only used for brief bursts to demonstrate slow motion, stop motion, and instant replay. Ampex introduced the commercial HS-100 instant replay deck in 1967. This unit was essentially a hard disk used to record analog video rather than digital computer data. The disc rotated at 1800 RPM and had a 30 second record capacity. Each concentric track stored one frame of video, so freeze frame was achieved by holding the head stationary, and slow motion by moving the head across the surface at less than 30 frames per second.