Apple Color 1.5 - Manual (Page 194)

The Chroma Scope
This scope shows the combined C
B
and C
R
color difference components of the image. It’s
useful for checking whether or not the overall chroma is too high, and also whether it’s
being limited too much, as it lets you see the result of the Chroma Limit setting being
imposed when Broadcast Safe is turned on.
For example, the following graph shows extremely saturated chroma within the image:
When you turn Broadcast Safe on with the default Chroma Limit value of 50, you can see
that the high chroma spikes have been limited to 50.
The Y
′
C
B
C
R
Scope
This scope shows the individual components of the Y
′
C
B
C
R
encoded signal in a parade
view. The leftmost waveform is the luma (Y
′
) component, the middle waveform is the C
B
color difference component, and the rightmost waveform is the C
R
color difference
component.
194 Chapter 8 Analyzing Signals Using the Video Scopes