Polycom RMX 1500 Content Protocols, SVC Only Content Setting, 263 & H.264 Auto Selection AVC only

Polycom RealPresence Collaboration Server (RMX) 1500/2000/4000 Administrator’s Guide

Table 4-4 summarizes the Maximum Resolution of Content and Frames per Second (fps) for Bit Rate Allocations to the Content Channel as set out in Table 4-3.

Table 4-4Content - Maximum Resolution, Frames/Second per Bit Rate Allocation

Bit Rate Allocated to Content			Content
Channel (Kbps)	Maximum Resolution			Frames/Second
From 64 and less than 512	H.264	HD720p		5
From 512 and less than 768	H.264	HD720p		30
From 768 and up to 1536	H.264 HD1080p			15

SVC Only Content Setting

The Content channel is transmitted in Graphics mode only.

Content Protocols

Two Content Protocols can be used for sharing content:

•H.263 (AVC only)

•H.264 (AVC and SVC conferences)

H.264 offers higher quality content, but is not supported by legacy endpoints. Depending on the endpoints capabilities, you can determine the content sharing experience by selecting the appropriate protocol and system behavior from the Content Protocol list:

•H.263 & H.264 Auto Selection (AVC only)

•H.263 (AVC only)

•H.264 HD (AVC only)

•H.264 Cascade and SVC Optimized (AVC and SVC conferences)

H.263 & H.264 Auto Selection (AVC Default Setting)

The H.263 & H.264 Auto Selection option should be selected when Content is to be shared using a mix of H.263-supporting and H.264-supporting endpoints. (In versions up to and including 7.6, this is named Up to H.264.)

Bit rate allocation to the Content channel by the RMX is dynamic according to the conference line rate and Content Setting selected for the conference.

If an endpoint that supports only H.263 for Content Sharing connects to a conference with Content Protocol set to H.263 & H.264 Auto Selection:

•Content is shared using H.263 even if H.264-supporting endpoints are connected.

•Content is shared using H.264 if all connected endpoints have H.264 capability.

•If the first endpoint to connect to the conference only supports H.263, the H.263 protocol is used for Content for all conference participants.

•If Content is already being shared using the H.264 protocol when a H.263 endpoint connects, Content sharing is stopped and must be manually restarted using H.263 (i.e. the endpoint using H.263 Content Protocol must connect first), for all participants to receive content. If the H.263 endpoint disconnects, Content sharing must be manually stopped and restarted and will automatically upgrade to the H.264 protocol.

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