This is not the complete


This is not the complete answer I know, but it’s something to do with US electricity current during the film era to assure the projectors ran at the same speed. Europe has 50hz AC, (PAL50) and North America has 60hz. (NTSC 60) an divisions from this. It was just a simple dividing circuitry used to synch the motor of the projectors.

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Every year, we head to CES to check out the latest innovations in consumer technology and look for the next big thing in video production. CES 2019 was no exception.