1!IIR
2!   TSP Lab
3!   Electrical & Computer Engineering
4!   McGill University
5! File: STL_dc_IIR_8k.cof
6! See ITU-T G.191 (2000), Software Tools Library (module iir_dir.c)
7! $Id: STL_dc_IIR_8k.cof 1.3 2002/06/18 AFsp-v8r2 $
8!
9! dc removal filter
10!           h(0)*z^2 + h(1)*z + h(2)
11!    H(z) = ------------------------
12!              z^2 + h(3)*z + h(4)
13!  - 1 second-order section (really first order since h(2) = h(4) = 0)
14!  - The response is monotonic.  For 8 kHz sampling
15!      -3 dB   at   18 Hz
16!      -1 dB   at   36 Hz
17!       0 dB   at  156 Hz
18!       0.6 dB at 4000 Hz
19  1 -1  0  -0.985  0
20