Block Noise Threshold And Pixel Noise Threshold; Automatic Video Adjustment; Refresh Image; Video Test Pattern - Avocent DSR Installer/User Manual

You can modify Noise Threshold and Priority Threshold values if you are using standard video
compression. You can also modify Block Noise Threshold and Pixel Noise Threshold values.
You can restore default threshold values by clicking Auto Adjust Video.

Block Noise Threshold and Pixel Noise Threshold

The Block Noise Threshold and Pixel Noise Threshold values set the minimum color levels in
terms of changed video blocks and pixels per thousand that are allowed.
• The Block Noise Threshold sets the minimum color change that occurs in a single video
block. Increasing the value reduces the network bandwidth. Decreasing the value makes
the size of these artifacts smaller.
• The Pixel Noise Threshold sets the minimum color change in a single pixel. Decreasing the
value reduces the number of low-contrast artifacts, but increases network bandwidth.
See Adjusting the view on page 73 for information about changing the color depth.

Automatic video adjustment

In most cases, you do not need to alter the Video Settings from the default. The system
automatically adjusts and uses the optimal video parameters. The DSR switch on-board web
interface performs best when the video parameters are set such that no (0) video packets are
transmitted for a static screen.
You can easily adjust your video parameters to ideal settings by clicking on the Auto Adjust
Video button in the Manual Video Adjust dialog box.
NOTE: You can also select Tools - Automatic Video Adjust from the Video Viewer window menu or click the
Automatic Video Adjust toolbar icon to automatically adjust the video.

Refresh Image

Clicking the Refresh Image button in the Manual Video Adjust dialog box completely
regenerates the digitized video image.
NOTE: You can also select View - Refresh from the Video Viewer window menu to refresh the image.

Video Test Pattern

Clicking the Video Test Pattern button in the Manual Video Adjust dialog box toggles a
display of a video test pattern. Click the Video Test Pattern button again to toggle back to a
normal video image.
Chapter 5: The Video Viewer 77