Requirement For Speaker Systems Connected To A Cisco Telepresence C Series Codec - Cisco Service Manual Service Manual

Cisco TelePresence SX20 Quick Set Administrator Guide
Contents Introduction Web interface System settings Setting passwords Appendices Appendices
Requirement for speaker
systems connected to a Cisco
TelePresence C Series codec
Cisco has put in a lot of effort to minimize the camera to
screen delay on our TelePresence endpoints.
New consumer TVs are usually equipped with "Motion Flow"
or similar technology to insert new video frames between
standard frames to create smoother images. This processing
takes time and to maintain lip synchronization, the TV will
delay the audio so that the audio and video arrives at the
same time.
The echo canceller in the Cisco endpoints can handle such
delay up to 30 ms. Many consumer TVs are not made for
real time video communication and may introduce more than
30 ms of delay.
If you use such a TV together with a C Series codec it is
recommended that you turn off "Motion Flow", "Natural
Motion" or any other video processing that introduces
additional delay.
Some consumer TVs also support advanced audio
processing like "Virtual Surround" effects and "Dynamic
Compression" to improve the TV experience. Such
processing will make any acoustic echo canceller malfunction
and should hence be switched off.
Some monitors are equipped with a setting called 'Game
Mode'. This mode is specifically designed to help reduce the
response time and will usually help to reduce the delay.
D14908.02 SX20 Administrator Guide TC6.0, JANUARY 2013. www.cisco.com — Copyright © 2012-2013 Cisco Systems, Inc. All rights reserved.
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