Polycom RealPresence 800s, Руководство администратора

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RealPresence Collaboration Server (RMX) 800s/Virtual Edition Administrator’s Guide
Polycom®, Inc. 145
Guidelines for Sharing Content Using H.264 HD
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Only endpoints that support H.264 capability at a resolutions of HD720p5 or higher will be able to
receive and send Content.
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This option is not available in SVC Conferencing Mode and CP and SVC Conferencing Mode.
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When H.264 HD is selected, the Send Content to Legacy Endpoints selection is enabled by default
in the Conference Profile – Video Settings tab.
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Maximum supported content resolution is HD 720p.
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Once an endpoint is categorized as a Legacy Endpoint and receives the content over the video
channel, it remains in this mode without the ability to upgrade to H.264 HD content and receive
content over the Content channel.
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The minimum Content Rate required for allowing a participant to share Content is the lower valued
parameter when comparing the System Flag setting ( H.264 HD System Flags ) and the content bit
rate allocation derived from the conference line rate ( Participant Content Sharing Based on
Connection Line Rate and System Flag Setting ) .
When the flag settings enable an endpoint to share Content at a content rate that is lower than the
conference content rate ( Participant Content Sharing Based on Connection Line Rate and System
Flag Setting ), the content rate of the entire conference is reduced to the content rate supported by
that endpoint.
Setting the Minimum Content Rate for Each Content Quality Setting for H.264 HD
System Flags determine the minimum line rate required for endpoints to share H.264 high quality content
for each Content Setting: Graphics, Hi Resolution Graphics and Live Video.
To change the System Flag default value, the flag must be manually added to the System Configuration.
For more information see
Modifying System Flags .
Example
The following table summarizes an example of two participants trying to connect to a conference running at
a
Line Rate of 1024Kbps. The Content Setting for the conference is Hi Resolution Graphics and the
H264_HD_HIGHRES_MIN_CONTENT_RATE System Flag setting are used to determine if Content will be
shared with the participant.
H.264 HD System Flags
Content Settings Flag Name Range Default
Graphics H264_HD_GRAPHICS_MIN_CONTENT_RATE 0-1536 128
Hi Resolution Graphics H264_HD_HIGHRES_MIN_CONTENT_RATE 0-1536 256
Live Video H264_HD_LIVEVIDEO_MIN_CONTENT_RATE 0-1536 384