Chapter 2-Additional Conferencing Information

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 160 (RMX 2000) 1080p HD video participants at 2048Kbps, or 80 (RMX 2000) or 160 (RMX 4000) 1080p HD video participants at 4096 Kbps.

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.

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Polycom 2000/4000 manual Continuous Presence CP Conferencing, High Definition Video Switching Mode