Polycom MGC Administrator, Руководство администратора

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MGC Administrator’s Guide
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be installed. In addition, the high bit rate support must be enabled in the
“system.cfg” file: In the GENERAL FLAG section, the HIGH_BIT_RATE
flag must be set to YES. The MCU also provides high quality video (30
frames per second) for line rates up to T1/ E1 in Transcoding and Continuous
Presence conferences, by allocating two video units (codecs) per participant.
One of the video codecs is used for encoding, while the other is used for
decoding the incoming video stream. This allows the video module to work at
the high frame rate of 30 fps in both incoming and outgoing video streams.
When running the conference, you can check which video codec handles the
participant video by checking the video card properties.
To view the Video module units:
To list the Video module’s units in the Browser pane, click the plus icon [+]
next to the card icon.
To display the module’s units in the Status pane, click the card icon.
A list of the Video ports appears below the slot icon and in the Status pane.
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The two video codecs allocated to one Enhanced Video participant must be
located on the same Video Bridge, but they do not have to be allocated to the
same DSP processor. This may be problematic when a reserved conference
is started, as at the reservation time the system only checks if there are free
VCP processors without checking whether they are located on the same
video board.
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Using two video units per participant reduces the number of participants that
can be handled by a video card by half (to 6 participants in Continuous
Presence conferences using Dual-video module).