OPTICOM has a white paper with Metrico discussing a case study on HD voice quality measurement. It looks at the differences between the 2000-era PESQ benchmark and the more recently released POLQA algorithm.
Metrico did testing using POLQA across two HD voice-enabled wireless networks in the UK, contrasting HD voice with standard narrowband calls, with the Samsung Galaxy S II Android smartphone used as the test handsets.
POLQA provides a refined way to measure MOS scores between narrowband and HD voice calls. During the UK testing suite, the average MOS score on an HD voice call ran to 3.79 while a narrowband call had an average of 2.93. Perhaps more importantly, around 98 percent of HD voice calls were greater than or equal to 3.0, while only 42.3 percent of narrowband calls came in at a MOS score of greater than or equal to 3.0 on one network and only 12.9 percent on the second network.
Towards the end of the 12 page report, there’s also a discussion about superwideband communications – an interesting note, considering Fraunhofer’s push of its AAC “full HD voice” codec.