Figure 1-19.
Basic colorplexer simplified block diagram
(2) Matrixing is the process of repackaging the information contained in the
red, blue, and green output signals from the color camera.
The outputs of the
matrix are the Y, the I, and Q signals. The I and Q signals were previously known
as the R-Y and B-Y signals. The Y signal is formed by applying the red, blue, and
green pickup tube outputs to the base of an amplifier. Then the three signals are
in phase with one another at the amplifier's input and output.
(a) A resistor network (crossconnected voltage divider) determines that the
amplitude of the Y amplifier output will consist of 30 percent red, 59 percent
green, and 11 percent blue.
This Y signal corresponds to the variations of
brightness in the scene being televised.
This is the signal received by a black
and white TV receiver, and is the brightness component in a color receiver.
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