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MGC Web Server Manager User’s Guide
3-17
Video Format
(con’t)
If one of the participants' endpoints does not
support CIF, the conference video format will
change to QCIF for all the participants.
• Using the H.263 protocol, you can select one
of the following options: Auto, QCIF, CIF, 4CIF,
16CIF, VGA, SVGA, XGA and NTSC.
4CIF - High Quality 4CIF video resolution available
in Continuous Presence conferences running at
512 Kbps or higher line rates. In this mode, the
endpoints transmit CIF (or QCIF) and receive 4CIF
images from the MCU. In full screen layout (1x1),
endpoints that can send 4CIF images will also
receive and view 4CIF images from the MCU.
In 4CIF CP conferences, you can select the
Quality of the screen display depending on the
video transmission:
Sharpness - Optimized for details. The video
picture does not change frequently, but it includes
details that you want to display in higher
resolution. For example, when displaying still
images, presentations, or capturing people.
Motion - Optimized for motion. The video pictures
change frequently and display movement, for
example, a sporting event where the camera is
moved around, people moving around, etc.
NTSC (National Television Standards Committee)
- Each frame contains 525 lines and up to 16
million colors.
VGA (Variable Graphics Array) - 640 x 480
resolution
SVGA (Super Variable Graphics Array) - 800 x 600
pixel resolution
XGA (eXtended Graphics Array) - 1024 x 768 pixel
resolution
VGA, SVGA, XGA and NTSC options are
important for displaying content when selecting the
People and Content mode. Typically the People
resolution is CIF with a frame rate of up to 30
frames per second, while the Content resolution is
VGA, SVGA, XGA or NTSC.
Table 3-1: Reservation Defaults - Settings1 Parameters (Continued)
Option Description