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Old 12-03-2011, 02:23 AM
Rinehart Rinehart is offline
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Join Date: Nov 2011
Posts: 129
OK, I see what you mean, but at the risk of trying your patience, let's consider the following thought experiment: suppose that we had a film camera that ran at 30fps, and that the pulldown time could be reduced to the time of the vertical blanking interval, so every frame of film captured a video frame without any loss of picture information.
At the time, film projection equipment for television did not use a CRT flying-spot scanner. Instead, they used a modified projector with either a very bright pulse lamp, or an incandescent lamp with a very fast shutter, both of which would produce illumination on the order of 1/1000 second, at 1/60 second intervals, using the vertical synch pulse to initiate the flash. The flashed image would then be directly focused on the photoelectric element of an iconoscope which had its own optical lenses removed. The mosaic plate would then be charged up, and would retain its charge until it was scanned by the electron beam. At the bottom of the scan, the synch pulse would cause the next flash, which would charge up the mosaic again, which would be discharged during the next scan. In the meanwhile, the film would advance to the next frame, and the process would be repeated. And so, one frame of film would translate to two fields of interlaced video, because the interlacing would be accomplished by the iconoscope. Given all this, how would it be possible to lose interlacing?
As I said, I hope not to have irritated you too much, but I really want to nail these things down before writing the book. Sloppy research and sloppy writing are an insult to the millions and billions of people who will plunk down their hard-earned cash for it.
Once again, thanks for taking the time.
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