Requirement For Speaker Systems Connected To Sx20 - Cisco TelePresence SX20 Administrator's Manual

Cisco TelePresence SX20 Quick Set Administrator Guide
Contents Introduction Web interface System settings Setting passwords Appendices Appendices
Requirement for speaker systems
connected to SX20
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 SX20 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.
D14908.10 SX20 Administrator Guide TC7.3, JULY 2015. www.cisco.com — Copyright © 2012-2015 Cisco Systems, Inc. All rights reserved.
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