Using PCoIP® Zero Clients with PCoIP Host Cards
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Note: Minimum Image Quality can also be configured using the OSD via User Settings Image tab as shown
below.
Figure 6: Minimum Image Quality setting under User Settings Image in zero client OSD
3.2.2 Maximum Initial Image Quality
The Maximum Initial Image Quality slider can be used to reduce network bandwidth peaks caused by significant
screen changes. Reducing Maximum Initial Image Quality may also reduce average bandwidth utilization under
certain circumstances (this is highly dependent on the details of your application and graphics, as explained
below).
Reducing this setting limits the quality of the first video frame of a screen change, thereby reducing bandwidth
utilization. Because of the PCoIP protocol’s progressive build capability, all static regions of the image will build
to a lossless state during subsequent screen refreshes regardless of this setting. Reducing the Maximum Initial
Image Quality setting will reduce average bandwidth requirements in situations when the screen image is
changing rapidly over a period of time, because in such situations, the individual screens never have a chance
to build to a lossless state until the final screen in a sequence.
The default value for Maximum Initial Image Quality is 90 but it can generally be set to 70 or 80 without
impacting the experience of the average user.
Note: Maximum Initial Image Quality must be greater than or equal to the Minimum Image Quality.
3.3 Latency
1:1 PCoIP sessions currently support network latency of up to 150ms. The PCoIP protocol can be used over
higher-latency networks, but the user experience will be impacted as latency increases.
System responsiveness becomes sluggish for many users at 40 – 60ms of network latency. If WAN latency is
causing usability problems, such as poor mouse responsiveness or dropped keystrokes, consider installing the
PCoIP host agent that improves keyboard and mouse performance over high-latency networks. See Section 8.1
for details on the PCoIP host agent.
