User's Manual Part 2

Nomad User’s Manual Chapter 8 – Analyzing the Results

Nomad automatically detects and uses the Scoring Model not used to score the original file. For

example, if POLQA was used to score the original file, PESQ will be used when re-scoring. The

Scoring Algorithm in use can be verified on the Voice Quality Summary tab of the output report.

Note: Although the PESQ and POLQA results for the same file cannot be output to the same report,

two output reports may be viewed side-by-side (or data copied from one to another) in order to

compare results.

8.12.2 Batch Scoring

Nomad provides a Batch Scoring Utility to score multiple .WAV files using PESQ, POLQA or both.

The output of this utility is a delimited text file that may be viewed in raw form, opened in Excel or

parsed with a script. The Batch Scoring Utility may be used to score previously unprocessed files

or for re-scoring.

Note: The Spirent ME hardware unit must be attached in order for the POLQA and PESQ & POLQA

scoring options to be available in the Batch Scoring Utility.

To batch process with this utility:

 On the Nomad Data → Utilities tab, select Batch Scoring and click the Launch Utility

button.

 Select the appropriate narrowband or wideband reference audio file from the Audio Files

directory within the Nomad installation (likely C:\Program Files\Spirent

Communications\Nomad\Audio Files).

 Select the Scoring Algorithm as PESQ, POLQA or PESQ & POLQA.

 Use the Add Files or Add Directory button to browse for and open the .WAV files to score.

 Click Next to accept the settings and proceed.

Figure 8-45 - Batch Scoring Configuration