Filter
Top Products
Chapter 4 - Setting Up Conferences
4-62
Video Format
(cont.)
For the H.263 protocol, you can select additional
options. 4CIF, VGA, SVGA, XGA and NTSC
options are important for displaying content when
selecting the H.239/People+Content Dual Stream
mode. Typically, the People resolution is CIF of up
to 30 fps, while the Content resolution is VGA,
SVGA, XGA or NTSC:
• 4CIF - Resolution: 576 pixels per line. Data rate
up to 30 frames per second. 4CIF is enabled in
the system.cfg file and requires the installation
of the Video+ card in the MCU.
Available in Video Switching conferences when
the following conditions are met:
• The endpoint can receive 4CIF.
• The conference line rate is set to 512 Kbps
or higher. The minimum line rate for 4CIF
selection is defined in the system.cfg file.
• The appropriate layout is selected for the
conference: layout is 1x1 (full screen) and
the video input stream is 4CIF, or is 2x2 or
3x3.
• VGA (Video Graphics Array)
Resolution: 640 x 480 pixels
• SVGA (Super Video Graphics Array)
Resolution: 800 x 600 pixels
• XGA (eXtended Graphics Array)
Resolution: 1024 x 768 pixels
• NTSC (National Television Standards
Committee). 525 lines per frame, up to 16
million colors.
Note: When a video format is selected, its frame
rate is displayed and, for H.263 formats, the
annexes are enabled.
Table 4-7: Conference Properties Advanced Settings - Media (Continued)
Field/Option Description