VIDEO 101

The Television Camera

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Lesson Outline
Introduction
How TV Works
Camera Controls
Operating Charac.
Camera Types

 


The TV Camera > Operating Characteristics > Color


ABOVE: A componant system provide the best picture, but you need three wires (or a special cable with three wires inside) to route red, green and blue between pieces of equipment.
BELOW: A composite system mixes (and then unmixes) red, green and blue. That way, only one cable is necessary. It's more convenient, but the picture quality is not as good.

COLOR (Continued):
Ideally, television cameras would keep the three basic signals (Red, Green, and Blue) separate to get the best possible quality.

(Computers DO keep red, green and blue separate, by the way. That's why your computer cable has so many pins. And it's why your computer's colors are so vivid!).

Some TV equipment actually does keep the colors separate. These devices are called "component." (We mentioned this in the VCR unit, but it's worth a reminder here.)

Component devices are a hassle because you need three wires every time you want to send a signal from one place to another.

So instead, we typically mix these signals (Red, Green and Blue) together to route them around. The process of mixing is called "encoding." Later on we unmix or "decode" the red, green, and blue signals to re-create the color image.

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Michael Trinklein