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Camcorder Video
The old camcorders (Pre ccd) used a single pickup vidicon with a stripe filter that processed the video into a luminance channel, from all the video, a red channel, the info filtered from the red stripes and a blue channel filtered from the blue stripes. The green channel was had by subtracting the red and blue from the luminance. This was quite a simple mattrix arrangement actually.
The vidicons used had a maximum resolution of around 400 lines which was used for the luminance but seldom achieved. The color component had a resolution of only a third of this 130 lines. Color thus was a compromise. Noticed by the smearing of high saturation color areas.
This process gave reasonably acceptable pictures on small screens but rather poor results on modern large screens.
Commercial firms with expensive digital processing equipment however can do wonders in enhancing the separate output of the color and luminance channels to recover information in the original video that is not visible in the simple analogue versions.
Barry
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