Difference between eliminating color clipping via contrast control vs. color control - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 3 Old 04-19-2013, 07:10 PM - Thread Starter
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When using color clipping patterns like the ones on the AVSHD709 disc and also the GCD disc, I've noticed color clipping can be eliminated/reduced by either lowering 'contrast' or 'color'.

My question is the following: if I see no clipping or discoloration on a white clipping pattern and the dynamic range tool in CalMAN5 shows no clipping in any channel but I do see color clipping on a pattern that shows shades of RGBCMY near digital 235, can I use the color control to fix this instead of the contrast control? Reducing either setting will fix the issue but what are the pros and cons to each means of eliminating the color clipping? Does each control (contrast, color) affect color clipping in a unique way? Or do they both do the exact same thing in this case?

UN46EH6030 Calibration/Settings
Display: Samsung UN46EH6030 LED-LCD TV; Audio: Yamaha HTR-3066 AVR/AMP, Sony Core Bookshelves (Sony SS-CS5) and Center (Sony SS-CS8) as fronts, Cambridge Audio S20 Bookshelves (CA S20-N) as surrounds, Dayton Audio SUB-1200 as subwoofer; Sources: PS4 (doubles as primary BD player), Xbox One, PS3, Xbox 360, Motorola RNG150N (Cable Box)
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post #2 of 3 Old 04-19-2013, 09:29 PM
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Contrast does one job,
Color does a different job.

You want red, green, blue and white to track the same.

The contrast control typically moves white, red, green, and blue together.
The color control typically moves red, green, blue relative to white.

The best way to analyze which control to tweak would be to look at gamut luminance.

Joel Barsotti
SpectraCal
CalMAN Lead Developer
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post #3 of 3 Old 04-20-2013, 09:34 AM - Thread Starter
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Quote:
Originally Posted by sotti View Post

Contrast does one job,
Color does a different job.

You want red, green, blue and white to track the same.

The contrast control typically moves white, red, green, and blue together.
The color control typically moves red, green, blue relative to white.

The best way to analyze which control to tweak would be to look at gamut luminance.

thanks, that makes sense

UN46EH6030 Calibration/Settings
Display: Samsung UN46EH6030 LED-LCD TV; Audio: Yamaha HTR-3066 AVR/AMP, Sony Core Bookshelves (Sony SS-CS5) and Center (Sony SS-CS8) as fronts, Cambridge Audio S20 Bookshelves (CA S20-N) as surrounds, Dayton Audio SUB-1200 as subwoofer; Sources: PS4 (doubles as primary BD player), Xbox One, PS3, Xbox 360, Motorola RNG150N (Cable Box)
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