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Originally Posted by Mercury Rising
Anyone know why 29.97?
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in short, it has to do with the fact that our wall outlets (AC power) operate at 60hz, or 60 cycles per second. That means all lights using an AC power source are flickering at that rate, which is too fast and too subtle to be seen. if the framerate (and thus the screen refresh rate) is exactly 30, it essentially produces a visible harmonic flickering, which is often disturbing and uncomfortable to watch. In Europe, AC power is on a 50 hz cycle, but I don't know if they use the standard 29.97 framerate or if that's what DV-PAL is for.