This instruction applies to HDMI monitors (not treated as DVI) and GPUs that support AVI infoframes on Windows Vista and later.
To improve image quality based on the display content
From the NVIDIA Control Panel navigation tree pane, under Display, click Adjust desktop colour settings to open the associated page.
If you have more than one HDTV connected through the HDMI connector, click the icon that corresponds to the HDTV that you want to change.
Click the Content type reported to the display list arrow and then click one of the available options that determines the type of video content the driver reports to the display.