Chapter 4: Advanced Options 53

Noise Threshold and Priority Threshold (Standard Video

Compression)

The Noise Threshold and Priority Threshold values set the minimum levels in
terms of changed pixels per thousand that are allowed without updating the
video block. The thresholds are described below:
• Raising the Noise Threshold will usually make the packets/sec count
decrease. The result will be larger cursor image artifacts remaining on the
screen. Decreasing the value will make the size of these artifacts smaller.
• The Priority Threshold sets the level where a signifi cant change is noted,
such as a new cursor position. Increasing the value will make the mouse
movements more sluggish. The Priority Threshold setting should always
be greater than the Noise Threshold setting, and usually two to three times
its value. Setting these thresholds to zero will cause a constant refresh of
the screen, which will make cursor tracking very diffi cult and may make
it diffi cult for other network users. The goal is to reduce the packet rate
to zero.

Block Noise Threshold and Pixel Noise Threshold

(DSR DVC Upgrade)

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. See Setting the color depth in Chapter 3 for information on changing
the color depth of a remote session window. The thresholds are
described below:
• The Block Noise Threshold sets the minimum color change that will occur
in a single video block. Increasing the value will reduce the network band-
width. Decreasing the value will make the size of these artifacts smaller.
• The Pixel Noise Threshold sets the minimum color change in a single
pixel. Decreasing the value will reduce the number of low-contrast arti-
facts, but will increase network bandwidth.
Image capture
The Width and Fine adjustments pertain to how the target video is captured
and digitized and are seldom changed.
The Width parameter is automatically changed by the Automatic Adjustment
function. A special image is required on the target in order to make accurate
adjustments independently.
The Fine setting may be adjusted up or down in eight unit increments.