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

		Defining AVC-Based Conference Profiles
New AVC CP Profile - Video Quality Parameters
Field/Option	Description
Content Protocol	Select the Content Protocol to be used for content sharing in Highest Common
	Content Sharing Mode.
	•	H.263
		Content is shared using the H.263 protocol.
		Use this option when most of the endpoints support H.263 and some endpoints
		support H.264.
	• H.263 & H.264 Auto Selection
		When selected, content is shared using H.263 if a mix of H.263-supporting and
		H.264-supporting endpoints are connected, or H.264 if all connected endpoints
		have H.264 capability.
	•	H.264 Cascade Optimized
		All Content is shared using the H.264 content protocol and is optimized for use
		in cascaded conferences.
	•	H.264 HD (default)
		Ensures high quality Content when most endpoints support H.264 and HD
		resolutions.
	Note: When Multiple Content Resolutions is selected, the Content Protocol field
	is hidden.
	For more information, see Content Protocols and Defining Content Sharing
	Parameters for a Conference
H.264 High Profile	The H.264 High Profile check box is un-checked by default and is displayed next to
	the Content Protocol drop-down menu if all the following conditions are met:
	• The MCU is a RealPresence Collaboration Server 1800, or 2000/4000 containing
		MPMRx cards.
	• Conferencing mode is VSW (Video Switching).
	• Multiple Resolutions (Content Transcoding) is not selected.
	• The selected Content Protocol is H.264 Cascade Optimized.
		If H.264 HD, H.264 Cascade Optimized is selected, the Content Resolution is
		set according to the line rate.
	• TIP Compatibility (in the Profile - Advanced dialog box) is selected as None.
Content Resolution	Select the Content Resolution and frame rate according to the selected Content
	Sharing Mode (Highest common Content or Multiple Resolution Contents) and the
	video protocol. For more information, see Defining Content Sharing Parameters for
	a Conference.
Content Rate	The Content Rate drop-down menu is displayed next to the Content Resolution
	drop-down menu when:

• H.264 Cascade Optimized is the selected Content Protocol and

• CustomizedContentRate is the selected Content Setting.

The Content Rate is dependent on the MCU type (RealPresence Collaboration Server with MPMRx or RealPresence Collaboration Server 1800) and can be up to 66% of the conference line rate. In MCUs with MPMx cards the Content Rate is limited to 2048 kbps, while when used with the RealPresence Collaboration Server 1800 the Content Rate is limited to 4096 kbps.

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