Avocent DSView 3 User's Guide download pdf (Page 59)

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.

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Avocent DSView 3 User's Guide Page 59