Maintenance Manual

ClearVision When enabled, the MCU will upscale
video streams from participants who are
sending low resolution video with the
purpose of making best use of the
MCU's HD video capabilities.
The MCU uses intelligent resolution upscaling
technology to improve the clarity of low-resolution
video. Select this setting to enable it to do so.
ClearVision is not available if your MCU is running in
Standard definition mode. To configure media port
modes, go to Settings > Media ports.
Video transmit
size
optimization
Allows the MCU to vary the resolution
and codec of the video being sent to a
remote endpoint within the video
channel established to that endpoint.
The options are:
■ None: Do not allow video size to
be changed during transmission
■ Dynamic resolution only: Allow
video size to be optimized during
transmission
■ Dynamic codec and resolution:
Allow video size to be optimized
during transmission and/or
dynamic codec selection
With this option enabled, the MCU can, for instance,
decide to send CIF video within a 4CIF channel if this
will increase the viewed video quality.
The circumstances under which decreasing the video
resolution can improve the video quality include:
■ if the original size of the viewed video is smaller
than the outgoing channel
■ if the remote endpoint has used flow control
commands to reduce the bandwidth of the MCU
video transmission
Typically, lowering the resolution means that the MCU
can transmit video at a higher frame-rate.
Video
resolution
selection
mode
This setting can be used to influence
the choice of outgoing video resolution
made by the MCU in certain
circumstances.
■ Default
The MCU will use its normal
internal algorithms to
dynamically decide which
resolution to send in order to
maximize the received video
quality.
■ Favor 448p
The MCU will heavily favor
sending 448p or w448p video
(resolutions of 576 x 448 and
768 x 448 pixels respectively) to
those endpoints that are known
to work best with these
resolutions.
You should leave this at Default unless your
environment dictates 448p or w448p resolutions only.
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