Polycom 1500/1800/2000/4000 manual 263 & H.264 Auto Selection, Cascade Optimized, 264 HD

Sharing Content During Conferences

H.263

The MCU supports content sharing with ISDN endpoints only over H.263 content media protocol.

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 HD may be used for content sharing only for a single MCU, but not in cascading conferences.

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.

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