OPTICOM OPERA - V 3.5 User Manual page 5

C O N T E N T S
6 Telephony Band Voice Quality Testing ................................ 117
6.1 What To Know About Testing Telephony Band Voice Quality ....................... 117
6.2 Reference Files for Voice Quality Testing and Echo Measurements .............. 118
6.3 PSQM as an Example for Perception Based Measurement Algorithms ......... 119
6.4 PSQM or PESQ, which one shall I use? ........................................................ 120
6.5 PSQM Measurement ..................................................................................... 121
6.5.1
6.5.2
6.5.3
6.5.4
6.5.5
6.5.6
6.6 PESQ Measurement and VAD Measurement ................................................ 137
6.6.1
6.6.2
6.6.3
6.6.4
6.6.5
6.7 Echo Measurement........................................................................................ 148
6.7.1
6.7.2
6.7.3
6.7.4
6.7.5
6.7.6
6.7.7
6.8 Measurement Examples ................................................................................ 157
6.8.1
6.8.2
6.8.3
7 Automation and Programming .............................................. 169
7.1 General.......................................................................................................... 169
7.2 Performing Measurements From Batch Files ................................................. 169
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.2.7
Fundamentals of the PSQM Measurement Algorithm........................................ 121
Signal Acquisition ............................................................................................... 123
PSQM Algorithm Properties ............................................................................... 124
Diagram Types ................................................................................................... 124
Command Line Arguments................................................................................. 134
Common Mistakes.............................................................................................. 135
Advantage of using PESQ instead of PSQM ..................................................... 138
Explanation of the Measured Parameters.......................................................... 138
Using PESQ ....................................................................................................... 143
Diagram Types ................................................................................................... 144
Command Line Arguments................................................................................. 148
Fundamentals of the Echo Measurement Algorithm .......................................... 148
Interpretation of Echo Parameters ..................................................................... 149
Signal Acquisition ............................................................................................... 149
Echo Algorithm Properties.................................................................................. 150
Specific Settings for the Echo Measurement ..................................................... 150
Diagram Types ................................................................................................... 151
Command Line Arguments................................................................................. 156
Example 1: Stand Alone Loop Measurement..................................................... 157
Example 2: Measurements From a Batch File ................................................... 165
More Examples .................................................................................................. 167
Syntax of the Command Line Parameters ......................................................... 169
Parameters common to all Algorithms ............................................................... 170
How to Use a Configuration File......................................................................... 171
Parameters Specific to the Measurement Algorithms ........................................ 172
Parameters Specific to OptiCall ......................................................................... 173
Example RunPsqm.bat....................................................................................... 175
Example, Bulk Call Testing ................................................................................ 175
v