“It took 23 seconds to record the digitized image to the cassette.”
Steve Sasson tells the story of how he invented the digital camera in 1975.
Perhaps Steve was inspired by this:
…the supercamera of the future may not even use film as we know it. Conceivably the camera could contain a permanent sensitive plate that records images and erases them the way tape recorders record and erase sound… TimeLife Books “Frontiers of Photography”
Where Does Photography Go From Here? 1972