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Precautions for chroma boost function
The figure below shows the relationship between the Pb and Pr input signals and the display level
when the chroma boost function (×3) has been set to ON.
Bear in mind that if the result of multiplying the chroma signal value by 3 exceeds ±109%, a limit
will be imposed at ±109%.
Example: A 30% signal will be expanded to 90%, but when a 100% signal is multiplied by 3, it
will be increased to 109% only.
If Pb is a 30% signal and Pr a 100% signal, the result will be 90% for Pb and 109% for
Pr, causing the color balance to be changed entirely.
For GBR input signals, the chroma boost function works as a function for changing the B and R
gain.
×3
100%
Display level
100
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