MGC Manager User’s Guide - Volume I
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Video Protocol
(cont.) Note:
•When H.261, H.263, or H.264 is selected, the
system regards it as a fixed format and
disables the dynamic adjustment of the highest
common video protocol.
•The dynamic adjustment of the video protocol
supports only 30 frames per second in CIF
format. All other H.263 capabilities are
disabled.
Video Format Specifies the resolution (number of lines in a frame
and the number of pixels in each line) of video
according to the selected protocol. This parameter
is enabled only with the Video Switching mode and
when the video protocol is H.261 or H.263. If the
Video Protocol is set to Auto, the Video Format is
disabled. Select from the available options:
•Auto - allows the system to find the video
format according to the participants' capabilities
and enable the dynamic adjustment of the
highest common video resolution. The system
connects all participants in CIF format. If one of
the endpoints does not support CIF, the
conference video format changes to QCIF for
all the participants. When a QCIF participant
leaves the conference, the system
automatically restores the CIF format for all the
participants remaining in the conference. If you
select CIF, all other participants must do the
same. If a participant's endpoint does not
support this format, the participant is connected
as Secondary (audio only).
•QCIF (Quarter Common Intermediate Format) -
Resolution: 144 lines/176 pixels per line (one-
fourth the resolution of CIF).
•CIF - A video format that supports both NTSC
and PAL signals. Resolution: 288 lines/352
pixels per line. Data rate up to 30 frames per
second.
Table 4-7: Conference Properties Advanced Settings - Media (Continued)
Field/Option Description