Subject: Filter bank in PEAQ From: Goran Bozidar Markovic <mr97411(at)ALAS.MATF.BG.AC.YU> Date: Sun, 28 Aug 2005 16:10:16 +0200This is my first posting to this list, so first hello to all that receive it. I am working on my master thesis: researching if there is possibility to improve advanced model of ITU-R BS.1387-1. First I have to build reference program and have written so far FFT and Filter bank ear model. I have big problem in testing if outputs of ear models are correct, so if anybody has implemented it and tested it, help would appreciated. I have implemented filter bank as described in 3.2 of "An examination and interpretation of ITU-R BS.1387:PEAQ" written by P. Kabal. It is the slowest part of filter bank ear model, so I am trying to implement it recursively. In "Perceptual audio quality assessment using a Non-Linear Filter Bank" by T.Thiede, FDC filter is implemented recursively, but without sin^2 part. It is stated there that filter in ITU-R BS.1387-1 corresponds to running 3 filters defined by (3.32) "with slightly staggered center frequencies in parallel". Can anyone explain me this, especially "slightly" and "staggered" (English is not my native language). Regards, Goran Markovic.