Polycom DOC2560C - Manual (Page 16)

Chapter 1-System Overview
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Additional video layouts have been created to give Telepresence operators
more video layout options when configuring TPX room systems. These
additional video layout options are available for selection when
Telepresence is selected in the conference profile.
Multiple Switching Modes
If the number of participants is higher than the number of video windows
in the selected layout, switching between video participants can be
performed in one of these modes:
•
Voice activation
• RMX user forces participants to selected video window
• Lecture Mode - The lecturer is viewed in full screen by all conference
participants, while the audience is “time-switched” in the speaker’s
view
• Presentation Mode - When the speaker’s presentation extends beyond
a predefined time, he/she becomes the current lecturer and the
conference switches to Lecture Mode
Video Switching
In Video Switching (VSW) mode all participants see the same video
picture (full screen). Only one CIF video resource is used for each
connection.
VSW mode conferencing is defined by:
•
Conference Line Rate setting in the conference profile
—
All endpoints must connect to the conference at the same Line
Rate. Line rates range from 192kbps to 6Mb (8Mb with MPMx).
The RMX will always connect participants at the highest possible
video quality the is supported by the conference Line Rate.
• Endpoint capabilities
—
Compliant endpoints can connect to conferences at resolutions of
up to 1920 x 1080 pixels (1080p).
The video quality for the conference is determined by the Highest Common
Mechanism and is based on the endpoint with the lowest capabilities that
is connected to the conference. The Highest Common Mechanism enables
the system to dynamically select the best video quality as endpoints
connect to and disconnect from the conference.