Configuring Image Quality

If desired, you can adjust the quality of the images you see during PCoIP sessions. You can set image quality preferences from the AWI Image page. Image quality and bandwidth settings help to determine the performance of your PCoIP deployment. These settings will control the amount of PCoIP data that flows through your available network bandwidth. Considerations for other network traffic should be made when adjusting these settings. The default settings (40, 90, 0) have been found to be beneficial for a wide variety of networks.

AWI Image Page
AWI Image page

Image quality settings apply to sessions with PCoIP Zero Clients or PCoIP software clients

Image quality settings apply to sessions between PCoIP Zero Clients or PCoIP Software Clients and PCoIP Remote Workstation Cards.

Image Parameters

Parameter Description
Use Client Image Settings The client image settings only take effect in a PCoIP session with a PCoIP Zero Client. This allows different PCoIP clients with different settings to configure the optimal image settings for network connections between them and the Remote Workstation Card. It is only advised to clear this checkbox and override the image settings on the Remote Workstation Card if one is unable to modify the image quality settings on the client. One example is with software clients which do not expose the image quality settings to the end user.
Minimum Image Quality
(default 40)
Enables you to compromise image quality and frame rate when network bandwidth is limited. Some use cases may require lower-quality images at a higher frame rate while others need higher-quality images at a lower frame rate.

In environments where the network bandwidth is constrained, reduce the number to enable higher frame rates. Increase the number to enable higher image quality through lower frame rates providing a perception-free quality. When network bandwidth is not constrained, the PCoIP system maintains perception-free quality regardless of the Minimum Image Quality parameter.

The Maximum Initial Image Quality must be greater than or equal to the Minimum Image Quality.

Maximum Initial Image Quality
(default 90)
Decreasing the number reduces the network bandwidth peaks caused by screen content changes, but produces lower quality images. Increasing this value produces higher quality images but also higher bandwidth peaks.

This parameter limits the initial quality on the first display frame of a screen change. Unchanged regions of the image are built to a lossless state regardless of this parameter.

The Maximum Initial Image Quality must be greater than or equal to the Minimum Image Quality.

Maximum Frame Rate
(default 0)
The maximum frame rate helps you manage multiple PCoIP sessions over a single network link. This setting determines the limit that your users can reach. Set this field to 0 to set no frame limit. If you set a value, a single user is limited to that value. This helps to control the user experience for all your users.
Disable Build to Lossless Clear this check box to retain the PCoIP protocol’s build-to-lossless feature, where images continue to be refined in the background until they reach a fully lossless state (that is, identical pixel-for-pixel rendering when compared to the host image source). This is the default (recommended) setting.

Warning: Selecting the Disable Build to Lossless check box degrades images.

Selecting the Disable Build to Lossless check box degrades the images presented to the user. Don't select this check box unless your administrator decides that users don't require optimal image quality to perform critical functions.

If you select this check box, the PCoIP protocol rapidly builds the client image to a high quality image that may be perceptually lossless, but is not a fully lossless state. This may provide some bandwidth savings, but is not recommended for use cases that require images and desktop content to be truly lossless.