Ok, the Clarkdale is

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January 12, 2011 at 12:17 pm #2978
swoon

    Ok, the Clarkdale is outputting RGB with levels (approximately) <16 and >235 clipped. You can alter this with the brightness setting in the driver. IIRC, the newest driver has a new switch for Limited/Full that I haven’t played with.

    To get proper blacks, you must make sure your display is appropriately configured to accept this input. For example, my Samsung display has a setting called “HDMI Black Level” with values of either “Low” or “Normal”. When set to “Low” the display will expect black to be level 16 and white to be level 235, in other words “Video Levels”. Otherwise “Normal” expects black to be level 0 and white to be level 255, in other words “PC Levels”. If there is no setting, you must figure out what your display expects.

    Most software such as WMC or TMT, etc should be requesting Video Levels from the driver.

    The reason why YCbCr is different and is easier to deal with is because there is no option as the encoding always requires “Video Levels”.

    Again, I highly recommend performing a basic calibration of your black levels using a PLUGE pattern.