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bitrex
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I have read before that when color television was developed the frame rate was changed from 30 frames per second to 29.97 frames per second to avoid some kind of problem with the circuitry, but I have never seen an explanation of just what this technical problem was. My somewhat educated guess is that maybe it had something to do with not wanting to start a new screen refresh cycle exactly at the same time the power supply was charging, to prevent glitches getting into the chroma demodulator/amplifier system? Or something?