Advanced PEAQ

[Dermot Campbell <dermot.campbell@xxxxxxxxxxxx>]

Dear List,

I would be interested in hearing from anyone who has experience working 
with the Advanced Version of PEAQ (BS.1387). In particular I am keen to 
view the interpretation by interested parties of MOV 5 (Average Linear 
Distance - AvgLinDist).

According to the standard:

"The Model Output Variable AvgLinDistA measures the loudness of the 
signal components lost
during the spectral adaptation of the Signal Under Test and the 
Reference Signal. It uses the
spectrally adapted excitation of the Reference Signal as the reference 
and the unadapted excitation
of the reference as the test signal. This MOV is calculated from the 
filter bank-based ear model. See
§ 5.2.1 for temporal averaging and Table 11 for constants."

My own interpretation is on a par with Professor Kabal's interpretation 
(who attempted an implementation of the Basic Version and documented his 
interpretations of the Advanced Version). I have implemented a version 
based on the information (which is quite sketchy in places) given in the 
standard. Without MOV 5 (AvLinDist) the algorithm produces DI values 
which are close to conformance values. However, when I include the MOV 5 
values it puts the DI way off. Obviously I am concluding that my (and 
Kabal's) interpretation of this MOV is inaccurate although from the 
standard I cannot.

Has anyone else tried to do an implementation of this and what was your 
interpretation for this MOV? Any information would be appreciated.

Also, it is my understanding that a number of people have tried to 
produce conforming models of both the Basic and Advanced Versions of 
PEAQ but all have failed to do so. Are there any conforming models of 
PEAQ available?

Thanks for your time and have a nice day.

Regards,
Dermot Campbell,
PhD Student,
National University of Ireland, Galway, Ireland.