Chapter 3 - Setting Defaults
3-16
Video Format CIF and QCIF are video formats used in video
conferencing systems. Video Format specifies the
data rate (in number of frames per seco nd) and
the resolution of each frame (number of lines in a
frame and the number of pixels in each line).
Video Format is enabled only in Video Switching
mode and when the Video Protocol is set to H.261
or H.263.
CIF (Common Intermediate Format) - Each frame
contains 288 lines and 352 pixels per line. The
data rate is up to 30 frames per second (FPS)
QCIF (Quarter Common Intermediate Format) -
Each frame contains 144 lines and 176 pixels per
line (it is one-fourth the resolution of CIF).
This field is disabled if the Video Protocol field is
set to Auto.
•Using the H.261 protocol, you can select Auto,
QCIF, or CIF.
Select Auto to allow the system to select the
video format for the conference according to
the participants' capabilities and en able the
dynamic adjustment of the highest common
video resolution. In such a case, t h e system
will connect all the participants in CIF format.
Table 3-1: Reservation Defaults - Settings1 Parameters (Continued)
Option Description