Figure 1-18.
Vector diagram
b. Color transmission begins at the camera where the light of the original scene
is separated into three primary colors; red, blue, and green.
(1) Three individual signals or electrical elements are provided by means of
three pickup tubes to represent the information of the three primary colors. The
three electrical signals representing red, green, and blue hues of the televised
scene are then routed to a device known as a colorplexer (also known as an
encoder).
Colorplexers are sometimes referred to as the heart of the television
system.
This unit combines the various individual signals originating at the
camera into a composite color television signal. Figure 1-19 illustrates a typical
colorplexer.
One can see that the red, blue, and green signals from the camera
enter the colorplexer and are fed to the matrix selection.
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