H.264 High Profile Support In Cp Conferences; H.264 High Profile Guidelines - Polycom RealPresence 1500 Administrator's Manual

● In a 1X1 Video Layout:
 SD: If the speaker transmits CIF, the MCU will send CIF to all participants, including the SD
participants. In any other layout the MCU will transmit to each participant at the participant's
sending resolution.
 HD: The MCU transmits speaker resolution (including input from HD participants) at up to SD
resolution. If 1x1 is the requested layout for the entire duration of the conference, set the
conference to HD Video Switching mode.
● In asymmetrical Video Layouts:
 SD: A participant in the large frame that sends CIF is displayed in CIF.
 HD: Where participants' video windows are different sizes, the Collaboration Server transmits HD
and receives SD or lower resolutions.
● In panoramic Video Layouts:
 SD: Participants that send CIF also receive CIF.
 HD: the Collaboration Server transmits HD and receives SD or lower resolutions, the
Collaboration Server scales images from SD to HD resolution.

H.264 High Profile Support in CP Conferences

The H.264 High Profile is a new addition to the H.264 video protocol suite. It uses the most efficient video
data compression algorithms to even further reduce bandwidth requirements for video data streams.
Video quality is maintained at bit rates that are up to 50% lower than previously required. For example, a
512Kbps call will have the video quality of a 1Mbps HD call while a 1Mbps HD call has higher video quality
at the same (1Mbps) bit rate.
H.264 High-Profile should be used when all or most endpoints support it.

H.264 High Profile Guidelines

● H.264 High Profile is supported in H.323, and SIP and ISDN networking environments.
● H.264 High Profile is supported in Continuous Presence conferences at all bit rates, video resolutions
and layouts.
● H.264 High Profile is the first protocol declared by the Collaboration Server, to ensure that endpoints
that support the protocol will connect using it.
Setting minimum bit rate thresholds that are lower than the default may affect the video quality of
endpoints that do not support the H.264 High Profile.
● For monitoring purposes, the Collaboration Server and endpoint H.264 High Profile capability is listed
in the Participant Properties - H.245 and SDP tabs for H.323 participants and SIP participants
respectively.
For more information see
● H.264 High Profile is not supported:
 For Content Sharing with MPMx cards
 With Video Preview
Polycom®, Inc.
Video Protocols and Resolution Configuration for CP Conferencing
Monitoring IP Participants.
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