MENu ADDRESS
SETTINGS DESCRIPTION
INFORMATION
PRODuCT
Control Panel >
Call Quality >
AuDIO ALGORITHM
Use this menu to disable audio algorithms in case you want to remove “low quality” audio, or if you have
interoperability issues when calling other systems. The system will automatically select the best audio
algorithm based on the call rate and the capabilities of the remote system.
G.711:
Normal quality audio (telephone quality 3.1kHz at 64kbps). This audio algorithm is mandatory for
video conferencing equipment and cannot be unchecked.
G.728:
Compressed normal quality audio (telephone quality, 3.1 kHz at 16kbps)
G.722:
High quality audio (7 kHz at 48kbps, 56kbps or 64kbps)
G.722.1:
Compressed high quality audio (7 kHz at 24kbps, 32kbps or 48kbps).
AAC-LD:
CD-quality audio, MPEG-4 Advanced Audio Coding - Low Delay (20 kHz, stereo at 128kbps
and mono at 64kbps).
Call Rate vs Audio algorithms selected
Automatically preferred audio algorithms on call rates up
to and including 192kbps
1. G.722.1 (24kbps or 32kbps)
2. G.728 (16kbps)
3. AAC-LD (64kbps or 56kbps)
4. G.722 (56kbps, 64kbps or 48kbps)*
5. G.711 (64kbps, 56kbps or 48kbps)**
6. AAC-LD (48kbps or 128kbps)
Automatically preferred audio algorithms on
call rates above 192kbps
1. AAC-LD (128kbps)***
2. AAC-LD (64kbps or 56kbps)
3. G.722 (64kbps, 56kbps or 48kbps)*
4. G.722.1 (32kbps or 24kbps)
5. G.728 (16kbps)
6. G.711 (64kbps, 56kbps or 48kbps)**
7. AAC-LD (48kbps or 128kbps)
* G.722 at 64kbps is used in H.323 and SIP (IP) calls only.
** G.711 at 64kbps is used in SIP and H.323 and SIP (IP)
calls only.
*** Dependent on a call rate above the AAC-LD 128
threshold. Note that this is not available on all Cisco systems.
All
Control Panel >
Call Quality >
AAC-LD 128
Specify a call rate for stereo audio, AAC-LD 128 kbps (Advanced Audio Coding - Low Delay). To enable
stereo CD-quality audio you need to specify a call rate for which stereo automatically should be enabled:
•
From the specified call rate and above the stereo CD quality 128 kbps AAC-LD is available.
•
For lower call rates, mono CD quality 64kbps AAC-LD is available.
•
Make your selection from
384 kbps and above
up to
1920 kbps and above
.
NOTE!
The call rate selection may differ within the different
video systems based on the bandwidth available.
NOTE!
Stereo I/O mode needs to be enabled to get stereo
audio. See
Stereo Settings
for details.
Stereo audio requires twice the bandwidth as mono CD-
quality audio. We recommend enabling stereo audio on high
call rates only.
Stereo audio can be received and listened to from e.g. a VCR
or DVD, but only when the microphone has been set to Off
(press Mic Off on the remote control).
All with
stereo
audio
51
Cisco TelePresence MXP Series
Administrator guide
D14791.01 MXP Series Administrator Guide F90, August
2011.
Copyright © 2010-2011 Cisco Systems, Inc. All rights reserved.
www.cisco.com
Contents
Contact us
Introduction
The menu structure
The settings library
Getting started
Appendices
The settings library
