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Conferencing Modes Overview
Polycom®, Inc. 17
High Definition (HD) – HD is an ultra-high quality video resolution that uses the H.264 and H.264
High Profile video algorithms. Depending on the RealPresnce Collaboration Server’s type,
compliant endpoints are able to connect to conferences at the following resolutions:
720p - 1280 x 720 pixels
1080p - 1920 x 1080 pixels
● Lost Packet Recovery (LPR) - LPR creates additional packets that contain recovery information
used to reconstruct packets that are lost during transmission.
Supplemental Conferencing Features
In addition to basic parameters that determine the quality of the video, additional features can be enabled,
adding capabilities to the conference, or enabling special conferencing modes:
● Content Sharing (H.239) – Allows compliant endpoints to transmit and receive two simultaneous
streams of conference data to enable Content sharing. H.239 is also supported in cascading
conferences. Both H.263 and H.264 Content sharing protocols are supported. If all endpoints
connected to the conference have H.264 capability, Content is shared using H.264, otherwise
Content is shared using H.263.
For more information, see Sharing Content During Conferences.
● Video Clarity (CP Conferences only) - Video Clarity applies video enhancing algorithms to
incoming video streams of resolutions up to and including SD.
Video Clarity is not supported by Collaboration Server (RMX) 1800-0.
● Encryption – Used to enhance media security at conference and participant levels.
For more information, see Implementing Media Encryption for Secured Conferencing.
● Conference Recording and Webcasting - The Collaboration Server enables audio and video
recording, streaming, and webcasting of conferences using Polycom RealPresence Capture Servers
or RSS recording systems.
● Lecture Mode (CP Conferences only) – The lecturer is seen by all participants in full screen while
the lecturer views all conference participants in the selected video layout.
For more information, see Lecture Mode.
● Presentation Mode (CP Conferences only) – When the current speaker’s speech exceeds a
predefined time (30 seconds), the conference layout automatically changes to full screen, displaying
the current speaker as the conference lecturer on all the participants’ endpoints. During this time the
speaker’s endpoint displays the previous conference layout. When another participant starts talking,
the Presentation Mode is cancelled and the conference returns to its predefined video layout.
Presentation mode is available with Auto Layout and Same Layout.
If the speaker in a video conference is an Audio Only participant, the Presentation Mode is
disabled for that participant.
Video forcing works in the same way as in Lecture Mode when Presentation Mode is activated,
that is, forcing is only enabled at the conference level, and it only applies to the video layout
viewed by the lecturer.
● Telepresence Mode (CP Conferences only) - Enables the connection of numerous high definition
telepresence rooms and of different models (such as TPX and RPX) into one conference maintaining
the telepresence experience. This mode is enabled by a special license.
Telepresence Mode is not supported by Collaboration Server (RMX) 1800-0.