Databases Reference
In-Depth Information
T A B L E 15 . 5
Coefficients for the 12-tap
Coiflet low-pass filter.
h
0
0.011587596739
h
1
−
0.029320137980
h
2
−
0.047639590310
h
3
0.273021046535
h
4
0.574682393857
h
5
0.294867193696
−
h
6
0.054085607092
h
7
−
0.042026480461
h
8
0.016744410163
h
9
0.003967883613
h
10
−
0.001289203356
h
11
−
0.000509505539
T A B L E 15 . 6
Coefficients for the 18-tap
Coiflet low-pass filter.
h
0
−
0.002682418671
h
1
0.005503126709
h
2
0.016583560479
h
3
−
0.046507764479
h
4
−
0.043220763560
h
5
0.286503335274
h
6
0.561285256870
h
7
0.302983571773
h
8
−
0.050770140755
h
9
−
0.058196250762
h
10
0.024434094321
h
11
0.011229240962
h
12
−
0.006369601011
h
13
−
0.001820458916
h
14
0.000790205101
h
15
0.000329665174
h
16
−
0.000050192775
h
17
−
0.000024465734
When
N
−
1
<
k
N
+
M
−
2 the output
y
k
is given by
N
−
1
y
k
=
h
k
−
m
x
m
m
=
k
−
M
+
1
Finally, when
k
2, the nonzero portions of the two sequences no longer overlap
and the output is 0. Thus for an input of length
N
, the output is of length
N
>
N
+
M
−
+
M
−
1 where
M
