OPTICOM OPERA Broadcast, User Manual

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C H A P T E R 5 : W I D E B A N D A U D I O Q U A L I T Y T E S T I N G
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After pressing the
Finish
button, the delay is computed, which might take some
seconds. Finally one can choose which result values to display. By a right
mouse button click in the upper diagram choose the type
Model Output
Variables and ODG
, for the lower diagram, select the diagram type
ODG vs.
Time that displays the averaged ODG since the start of the measurement. The
resulting view of the Main Window is shown in
Figure 5.42
. The upper
diagram shows the averaged ODG. When compared with the SDG scale
depicted in Section 2.1, observe that the ODG value of –1.80 in this example
corresponds to slightly annoying impairments.
The display of the current measurement settings to the right of each diagram
panel contains the parameter "
Status
" which is a measure of the reliability of the
delay compensation. For measurements with the PEAQ algorithm this value
should not fall below approx. 80%. When the status value is less it could be
useful to check what the time signals of the reference and the test signals look
like. Change to the diagram type
Timesignals to check the gain and the delay
compensation.
When interested in more detailed information about your measurement, you
might want to check the MOVs. Please refer to the ITU-R recommendation
BS.1387 in the Appendix of this manual for detailed explanation.
Figure 5.42:
Main Window with the view of the measurement results
5.6.3 Example 3: Measurements From a Batch File
For this example use the batch files contained on the PEAQ Sample CD which
were received along with your OPERA™ system. On your PEAQ Sample CD
you find three batch files in the root:
•
ConfPeaqBasic.bat
•
ConfPeaqAdvanced.bat
•
RunPeaqBasic.bat
•
RunPeaqAdvanced.bat