@inproceedings{DewhirstEtAl_AES08,
  author = {Dewhirst, M. and Conetta, R. and Rumsey, F. and Jackson, P.J.B. and Zielinski, S. and George, S. and Bech, S. and Meares, D.},
  year = {2008},
  title = {{QESTRAL} (Part 4): Test signals, combining metrics and the prediction of overall spatial quality},
  booktitle = {Proc.\ 125th AES Conv., San Francisco CA},
  month = {Oct.},
  number = {7598},
  abstract = 
"The QESTRAL project has developed an artificial listener that compares the 
perceived quality of a spatial audio reproduction to a reference 
reproduction. Test signals designed to identify distortions in both the 
foreground and background audio streams are created for both the reference 
and the impaired reproduction systems. Metrics are calculated from these 
test signals and are then combined using a regression model to give a 
measure of the overall perceived spatial quality of the impaired 
reproduction compared to the reference reproduction. The results of the 
model are shown to match closely the results obtained in listening tests. 
Consequently, the model can be used as an alternative to listening tests 
when evaluating the perceived spatial quality of a given reproduction 
system, thus saving time and expense."
}