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Chapter 2-Additional Conferencing Information
2-2
For conferences with more participants than display squares, the RMX
dynamic video mix capability allows the viewed sites to be modified
throughout the conference. The displayed layout can be changed during
an ongoing conference, allowing a participant to view different screen
layouts of the other conference participants. These layout options allow
conferences to have greater flexibility when displaying a large number of
participants and maximizes the screen’s effectiveness.
High Definition Video Switching Mode
In Video Switching mode all participants see the same video picture (full
screen) and use only one CIF video resource for each connection. The
current speaker is displayed in full screen on all the participants'
endpoints, while the speaker sees the previous speaker. Switching
between participants is voice-activated; whenever a participant starts to
speak, he or she becomes the conference speaker and is viewed on all
screens. All conference participants must use the same line rate and video
parameters such as video protocol, frame rate, annexes and interlaced
video mode as no video processing is performed.
High Definition Video Switching is an ultra-high quality video resolution
enabling compliant endpoints to connect to conferences at resolutions
of 1280x720 pixels (720p) and at line rates ranging from 384kbp to 4Mbps
(with MPM) and 1920 x 1080 pixels (1080p) at line rates ranging from
384kbp to 6Mbps (with MPM+).
HD Video Switching uses less system resources. The maximum
conference size is 80 video participants.
Continuous Presence (CP) Conferencing
Video quality in Continuous Presence mode is affected by the conference
line rate (that determines the maximum line rate to be used by the
connecting endpoints), and the video capabilities of the endpoints such as
the video protocol, video resolution and frame rate.
The video protocol selected by the system determines the video
compression standard used by the endpoints. In Continuous Presence
conferences, the system selects the best video protocol for the endpoint
according to its capabilities.