Codec

Menu path: Setup > Sessions > Citrix > Citrix Global > Codec

• Graphical codec: Decoding method for the transferred screen content

  • Automatic: Automatically selects the appropriate codec according to the performance of the hardware.

  • H.264 Deep Compression Codec:

    • High image quality is possible, with lower network load

    • Without available hardware acceleration it is very CPU intensive.

      At the Citrix Server following policies must be set:

      • Use video codec for compression must be enabled.

      • For the entire screen: Text tracking should be enabled if bandwidth is not a problem to increase readability in Office applications

      • For actively changing regions: Citrix Receiver 13.6+ required, otherwise JPEG fallback will be loaded

      • Use video codec when preferred: If For actively changing regions is selected by Citrix, a Citrix receiver 13.6+ must be activated, otherwise JPEG fallback is loaded.

      
      

  • JPEG: 

    • High image quality possible, with high network load

    • Moderate CPU load

Additional parameters for H.264 Deep Compression Codec

These parameters are relevant if Automatic or H.264 Deep Compression Codec is selected.

• Accelerated H.264 Deep Compression Codec 

  • Enables hardware-accelerated decoding with H.264, which reduces CPU load.
  • Uses the software implementation of H.264 and results in a greater CPU load. (default)

  For more information, read the How to Set Up Citrix Sessions with Hardware-Accelerated H.264 Deep Compression Codec How-To.

  
  

Following options are available in combination with H.264 Deep Compression Codec:

• Text tracking:

  • Loss-free depiction of texts (default)
    Text is displayed sharper, especially if "Visual Quality" is set to Low/Medium. Recommended for office applications, but requires a higher available bandwidth. With bad connection and EDT over UDP it can lead to missing text parts.

• Small frames feature:

  • Pixel-perfect depiction of lines etc. (default)
    This feature allows efficient processing when only a small part of the screen changes over time (for example, when a cursor flashes on an otherwise stable background).

Additional parameters for JPEG

These parameters are relevant if JPEG is selected.

• JPEG direct-to-screen decoding

  • Decodes image tiles directly without using a bitmap cache.
  • No JPEG direct-to-screen decoding (default)

  
  

• JPEG batch decoding

  • Enables batch processing and delayed XSync. (default)