Polycom RealPresence RMX 4000, Руководство администратора

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Sharing Content During Conferences
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H.263
In this mode, all endpoints share content using H.263 protocol. Select this option when either most
endpoints support H.263, or to share content over a cascading conference, in which case, the cascading
link should be created prior to participants joining the conference.
The Highest Common principle (see Highest Common ) is applied for determination of content parameters
in single MCU scenarios, and a fixed rate (see Fixed Rate ) in cascading environments.
H.263 & H.264 Auto Selection
Select this option to share content using a mix of H.263 and H.264 capable endpoints. Until version 7.6
(including), this option is named
Up to H.264 .
For single MCU scenario, the Highest Common principle (see Highest Common ) is applied to determine
content parameters. In cascading environments, an H.263 fixed rate is used (see Fixed Rate ) regardless of
endpoint capabilities.
H.264 Cascade Optimized
This content sharing option applies for H.264 content media protocol, and provides fixed content rate (see
Fixed Rate ) and resolution according to the conference line rate. It must be used for cascading conferences.
The H.264 Cascade Optimized option maintains content quality, and prevents content refreshes upon
participants connect/disconnect from the conference.
In cascading environments using this option, the cascade link signaling must be H.323.
The H.264 Cascade Optimized option must be used for cascaded conferences sharing H.264 content. The
selected content is defined by the conference parameters:
●
Line rate
●
Content settings (Graphics, Hi-res Graphics, or Live Video)
●
Resolution configuration
●
Base / High profile content
For more information see H.264 Cascade Optimized (Fixed) Content Rates Tables .
H.264 HD
H.264 Content Sharing Properties
The H.264 HD option should be selected if most endpoints in the conference support H.264 to ensure high
quality content.
The MCU supports content sharing with ISDN endpoints only over H.263 content media protocol.
H.264 HD may be used for content sharing only for a single MCU, but not in cascading conferences.