User's Manual

Base Unit User Guide Issue 1 Tech-X Flex™
4-6 4: System Menu
Intro
Wi-Fi
10/100
System
IP/Video
Specs
Table 4-3 Channel Guide/Network Setup - Page 2 parameters
Parameters Description
Int’l Code Country/continent code. This specification allows the analysis to adjust the
quality metric scores according to statistical data available in different parts of
the world.
Options include:
• NA - North America
• SA - South America
• EU - Europe
• AF - Africa
• AS - Asia
• JP - Japan
• AUS - Australia
Coder Class Video coder class, which describes the ability of the stream to tolerate packet
loss with respect to perceived quality. The coder class is determined by two
contributing factors:
• Codec - Some codecs, particularly older codecs, are very sensitive to packet
loss and degrade very quickly with small amounts of loss.
• Error correction and concealment - A number of loss mitigation techniques
may be employed to conceal packet loss, typically involving coordination
between the video server and client where checksum and other validation
methods allow missing data to be supplemented.
The specified value determines how heavily the analysis weights the effects of
packet loss. For example, if you specify an operation at high rates of loss, any
detected loss will have less of an effect on final quality scores. This is normally a
static setting on any given network that does not change between tests.
Options include:
• A - Stream can operate over networks with up to 20% packet loss
• B - Operation with up to 10% loss
• C - Operation with up to 5% loss
• D - Operation with up to 0.5% loss