Cisco Cisco WebEx Meeting Center WBS30 Libro bianco
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Table 8 gives test results for HQ-Active Video tests.
Table 8.
Test Results for HQ-Active Video Tests
Session
HQ-Active Video
Camera
Logitech 9000
Logitech LS 7500
Cisco Camera VT III
Source
Slow-moving subject
No moving
Slow-moving subject
No moving
Faster-moving subject
180p
360p
180p
180p
360p
180p
180p
360p
UDP
TCP
UDP
TCP
UDP
TCP
UDP
TCP
UDP
TCP
UDP
TCP
UDP
TCP
UDP
TCP
Sender traffic
(kbps)
(kbps)
271
264
881
975
72
89
290
308
888
923
59
58
320
330
911
991
Received traffic
(kbps)
(kbps)
220
235
603
631
47
57
228
244
604
628
54
46
261
245
609
635
Maximum Video Bandwidth Consumption
The bandwidth required to send the video is higher than the required bandwidth for receiving the video. SVC
technology used in the client software uses the multilayer frames to send video and allows the client to
automatically select the best possible resolution to receive the video. Table 9 gives results for the tests measuring
video bandwidth consumption.
Table 9.
Video Bandwidth Consumption
Maximum Bit Rate (Send)
Maximum Bit Rate (Receive)
High-definition
720p (1280x720)
3.0 Mbps
2.5 Mbps
High-quality
360p (640x360)
1.5 Mbps
1 Mbps
Standard quality
180p (320x180)
0.5 Mbps
0.5 Mbps
Six thumbnails
90p
-
0.5 Mbps
One thumbnail
90p
50 kbps
-
The site administrator can set the video quality for the entire site and at the host account level, and the host can set
those parameters when scheduling the meeting. Attendees have no control over the video quality; it is controlled
automatically during the meeting based on various factors. The host can schedule the meeting with a maximum
video resolution up to 720p (WebEx Meeting Center and Training center), 360p, or 180p. Thumbnail video is
always set at 90p, and it cannot be changed.
Each resolution can support variable frame rates: HD (720p) at 24-30 fps; HQ (360p) at 24-30 fps; SQ (180p) at 12
fps; and thumbnail video at 6-10 fps.
Examples of the Bandwidth Consumption for Video Use Only (No Data and No WebEx Integrated
VoIP)
VoIP)
Note that the client can display one main window with an active speaker, meaning that at any time when people
are speaking, their videos appear in the main, enlarged window. In addition to the main active speaker window, a
client can view up to six additional scrollable thumbnail views in the participant list, and up to five additional
scrollable thumbnail windows in full-screen mode. There are no thumbnail images in the expanded full-screen
video in HD mode (Meeting Center only).