OPTICOM OPERA Broadcast, User Manual

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