Digital Signal Processing Reference
In-Depth Information
60
40
20
0
Clean speech
−
20
−
40
Noisy speech
−
60
−
80
0.5
1
1.5
2
2.5
3
3.5
(a) Time (sec)
25
2
20
1.5
15
1
10
0.5
5
0
0
−
5
−
0.5
−
10
−
1
15
−
20
−
−
1.5
3
3.2
3.4
3.6
1.7
1.8
1.9
2
(b) Time (sec)
(c) Time (sec)
Figure 10.15
The LR (solid line) and SLR (dotted line) of a segment of vehicle noise
signals of 5 dB SNR; the dotted horizontal-line indicates the VAD threshold and the
boxed regions in (a) are enlarged in figures (b) and (c)
Search WWH ::
Custom Search