High Definition (Hd) - Polycom RMX 2000 Administrator's Manual

Chapter 6-Additional Conferencing Information

High Definition (HD)

6-4
High Definition (HD) is an ultra-high quality video resolution enabling
compliant endpoints to connect to conferences at resolutions
of 1280x720 (720p) and at bit rates ranging from 384kbp to 4Mb.
Setting a video conference to HD resolution forces all conference
participants to connect using the same conference line rate and HD
capabilities. Endpoints that are unable to meet these requirements connect
as Secondary (audio only).
The supported conference size is up to the bridge capacity.
Prior to running HD conferences, an HD enabled Profile must be created.
To connect to an HD conference via an Entry Queue, the Entry Queue
must be HD enabled and must be set to the same bit rate as the target
conference.
Video Display in HD Conferences
• The only supported layout is 1x1.
• Displayed aspect ratio is 4x3 or 16x9.
• Personal layout, site names, skins, etc... are not supported in HD.
• Video forcing is enabled only at the conference level.
Specialized Features Supported in HD
• H.239 is supported with HD. When an endpoint starts a Content
session, the video bit rate will be decreased according to the Content
allocation settings, and this may result in a lower frame rate.
• Encryption and FECC are supported in HD.
• Lecture Mode is supported in HD.
• HD is supported by the cascaded link. For more information about
Cascading, see "Cascading Conferences" on page 6-19.
• If the API attempts to send a parameter or value that is illegal within
the HD definition, the MCU will override the API and force the
parameter or value defined in the current HD conference profile.