Extra Information

Niagara SCX User Guide
ViewCast 75
Tab Description
• The calibration specified in video standards matches the requirements of
cameras and TV sets in broadcast use.
— This usually, however, does not match the needs of computer-based
applications or the response curves of computer monitors.
— Therefore, you often need a correction inverse to the original bias and you
may want to tune for the characteristics of a particular monitor.
• When you disable the gamma correction filters:
— Set the gamma correction value to exactly 1.00
— The software-based gamma filter works in pass-through mode with no
effect on the video and no processing bandwidth use.
— Uncheck the Gamma checkbox
• When you enable gamma correction, the text box and graphic show the factor
applied.
• If you run preview video while adjusting the filter, you see your adjustment
effects interactively.
• You can use one of three methods to adjust the gamma correction value:
(1) Directly enter text in the numeric text box.
(2) Click [+] and [-].
(3) Select Signal field (NTSC, PAL, or SECAM) from the options list.
• Gamma correction applies to all filters and all output pins on each device. The
gamma correction can be different for different physical devices.
NOTE: These values represent the inverses of the gamma bias that you applied
at the video source per the video standard so the resulting video becomes
gamma-neutral.
Tuning Utilities
• Access the Tuning Utilities option for a selected card.
• Shows tuning utilities options for selected devices (Figure 129).
NOTE: Refer to
Chapter 12: Tuning Utilities for added diagnostics data.
Figure 129. MPEG-4 Tuning Utilities Settings
Audio Settings
• Lists the audio input options for selected audio devices.
• Makes left and right volume level adjustments available if the audio capture
device supports them.