Vidikron Vision 75 - Manual (Page 76)

Operation
60 Vidikron Vision Model 65/Model 75 Installation/Operation Manual
Advanced Options: For more precise control over picture quality, select Advanced Options
from the ISF menu and press ENTER.
• Image Enhance: The Image Enhance menu gives you options for improving the quality of
standard-definition, 480i images. (For 480p and higher-definition images, the controls in
this menu are disabled.) Keep in mind that these controls add frequencies that are not
present in the original signal, and may make images appear “noisy” if misused.
• DNR: Use the or button to adjust the Digital Noise Reduction (DNR). DNR is useful
for clearing up noisy images from interlaced SD sources. Adjust as desired, keeping in
mind that reducing noise (which reduces high frequencies) may also soften the image.
• Detail Enhance: Use the Detail Enhance control to improve the apparent horizontal
and/or vertical resolution of the image.
• Luma Enhance: Use the Luma Enhance control to improve the apparent brightness of
the image.
• Chroma Enhance: This control adds chroma (color information) to the input signal and
can make colors appear more vibrant and saturated.
• Black Threshold: This control compensates for incoming elevated black levels present in
certain video signals, and ensures that blacks in the display are neither “crushed” (where
dark grays appear black) nor excessively elevated (where blacks appear dark gray). By
default, the projector automatically determines the best setting according to the type of
incoming video signal:
• 0 IRE: Used for DVD output with “enhanced black,” SECAM, most PAL standards and
Japanese NTSC.
• 7.5 IRE: Used for most NTSC video signals.
For some types of video, you may want to override the setting. Generally, if black appears
crushed when brightness = 30, choose “0 IRE.” If black appears excessively elevated, use
“7.5 IRE.”
• Gamma Selection: The normal gamma setting of 2.2 is correct for almost all signals and
conditions. If excess ambient light washes out the image and it becomes difficult or
impossible to see details in dark areas, lower the gamma setting to compensate. This will
improve contrast while maintaining good details for blacks. Conversely, if the image is
washed out and unnatural, with excessive detail in black areas, increase the setting. Again,
good gamma improves contrast while maintaining good details for blacks and whites.
Generally, higher Gain settings reduce the image contrast; higher Offset
settings reduce the image brightness.
Note