Table 4.1: Transmitter Tuning Parameters - Basic Settings - Avocent Emerge MPX Installer/User Manual

44 MPX Extender Installer/User Guide
The transmitter offers basic and advanced settings. The basic settings are described in the
following table:

Table 4.1: Transmitter Tuning Parameters - Basic Settings

Setting
Wireless Video Data Rate
Content Type
Luma-Chroma
Retry Limit
Description
These settings allow the MPX transmitter to dynamically adjust the
degree of compression applied to real-time video data. The actual data
rate at any given time will fall between the maximum and minimum data
rate values, unless the image requires less than minimum data rate (such
as a screen that is mostly black or white).
High data rates consume more bandwidth and result in the sharpest
possible image. Lower data rates result in a softened image that requires
less bandwidth.
During moments of interference, there may be insufficient bandwidth for
the transmitter to maintain 30 frames per second at the maximum data
rate while servicing requests for lost data. The minimum data rate setting
determines how the transmitter responds to this condition. Setting this
value high will cause the transmitter to drop frames as needed to
maintain the sharpest possible image. Setting this value low will cause
the transmitter to soften images as needed to maintain the highest
possible frame rate. High values may be preferable for still computer
graphics. High values may be preferable for motion video.
Maximum rates for wireless media sessions include integer values up to
20 Mbps. Maximum rates for wired media sessions include integer values
up to 40 Mbps.
The MPX transmitter supports two compression algorithms. One
algorithm is geared toward computer graphics. Office automation tools
such as presentation or spreadsheet applications will benefit from this
setting. The other compression algorithm is geared toward motion video.
Cameras and digital video players will benefit from this algorithm. Select
the algorithm that is best suited for your primary application.
This parameter affects the way in which the transmitter processes luma
and chroma information in the input video stream. By default, 67% of the
output stream is dedicated to luma information and 33% of the output
stream is dedicated to chroma information. This ratio is well suited for a
combination of motion video and some computer graphics. For
applications that are heavily slanted toward still graphic images with
sharp edges, you may have better results by increasing luma to 80%.
Experiment with the slider bar to find the settings that are best for
your application.
This parameter sets an upper bound on the percentage of available
media LAN bandwidth that a transmitter will allocate for servicing of
retransmitted data.