Two posts in one day? That's strange. In my effort to learn more about video, I explored some new features of current TVs. You might have seen that new TVs have crazy looking labels that say "120hz" or "240hz." What's that all about? Well, I don't want to get to technical here, but here is a little background information. Broadcast signals are typically 30 frames per second. That's 30 different images that you see on your screen per second. Well, actually it's 60 half images. Our brains can fill in information. TVs typically operate at 60hz. The hertz used to refer to energy passed through something in the tv, but now with LCD tvs they really refer to frames per second (fps). So, TVs work could for broadcast. Film, however, is usually 24 fps. In order to fill up the available 60hz, complicated math has to happen. 24 is not a multiple of 60, so a 3:2 pulldown happens. Some new frames are inserted . . . blah, blah, blah. So, you'll find t...
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