Video black level is defined as the level of brightness at the darkest (black) part of a visual image or the level of brightness at which no light is emitted from a screen, resulting in pure black.
Video displays generally need to be calibrated so that the displayed black is true to the black information in the video signal. If the black level is not correctly adjusted, visual information in a video signal could be displayed as black, or black information could be displayed as above—black information (grey). Use the black level adjustment to optimise the picture quality for your TV.
Note: This setting is a matter of personal preference and will not damage or otherwise negatively affect your television. In some cases there may not be a perceivable difference.
The video black level option is only available when a composite or S-video cable connects the media centre to the TV. This option is not available if component cables connect the media centre to the TV. If the connection is made with a composite or S-video cable, follow these steps: