Audio Algorithm Support; Guidelines - Polycom RealPresence 800s Administrator's Manual

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Audio Algorithm Support

The Collaboration Server supports the following audio algorithms in AVC conferences:
G.711, G. 719, G.722, G.722.1, G.722.1C, G.729A, G.723.1, Polycom Siren 7 (in mono), Siren14,
Siren 22 (in mono or stereo) and SirenLPR.
Polycom's proprietary Siren 22 and industry standard G.719 audio algorithms are supported
for participants connecting with Polycom endpoints.
The Siren 22 audio algorithm provides CD-quality audio for better clarity and less listener
fatigue with audio and visual communication applications. Siren 22 requires less computing
power and has much lower latency than alternative wideband audio technologies.
The SirenLPR audio algorithm provides CD-quality audio for better clarity and less listener
fatigue with audio and visual communication applications.
In SVC conferences, the system supports SAC (Scalable Audio Coding) audio algorithm.

Guidelines

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Polycom, Inc.
Optional. Add a participant to the list of participants to be Auto Scanned:
— Click on the participant's name in the All Participants list and then click the Add
button to move the participant to the Scanning Order pane.
Optional. Delete a participant from the list of participants to be Auto Scanned:
— Click on a participant's name in the Scanning Order list and then click the Delete
button to move the participant back to the All Participants pane.
Optional. Add all participants to the list of participants to be Auto Scanned by clicking
the Add All button.
Optional. Delete all participant from the list of participants to be Auto Scanned by
clicking the Delete All button.
Optional. Move the participant up in the Scanning Order by clicking the Up button.
Optional. Move the participant down in the Scanning Order by clicking the Down
button.
Click the Apply button to confirm and keep the Conference Properties dialog box open, or
click the OK the button to confirm and return to the Collaboration Server Web Client Main
Screen.
Siren 22 and G.719 are supported in both mono and stereo.
Stereo is supported in H.323 calls only.
Siren 22 is supported by Polycom HDX endpoints, version 2.0 and later.
G.728 is supported in H.323 and SIP environments.
SirenLPR is enabled by default and can be disabled by setting the system flag,
ENABLE_SIRENLPR, to NO.
SirenLPR is supported:
— In IP (H.323, SIP) calls only.
— In CP and VSW conferences.
— With Polycom CMAD and HDX "Canyon 3.0.1" endpoints.
— For mono audio at audio line rates of 32Kbps, 48Kbps and 64Kbps.
— For stereo audio at audio line rates of 64Kbps, 96Kbps and 128Kbps.
Chapter 3-Additional Conferencing Information
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