Digital Signal Processing Reference
In-Depth Information
ICLD
−
25
−
18
−
14
−
10
−
7
−
4
−
2
0
2
4
7
10
14
18
25
ICPD 0
π/
4
π/
2 3
π/
4
π
5
π/
4 3
π/
2 7
π/
4 2
π
ICC
1
0.937 0.841
0.6
0.367
0
−
0.589
−
1
Tab l e 9 . 1 .
Quantization codebook for ICLD, ICPD, and OPD
transmitted, this has a cost of 10 bits per analysis frame. If we transfer these parameters
every 20 ms, the corresponding bit rate is 2 kbit/s.
In Figure 9.4, the angles
θ
, calculated at the receiver as a function of time,
are shown for the critical bands when the two channels
x
1
(
n
) and
x
2
(
n
) of the
stereophonic signal processed are created from a unique source
s
(
n
) as follows:
x
1
(
n
)=
g
1
×
s
(
n
). Here, we have simultaneously a violin
appearing to move from the left-hand loudspeaker toward the right-hand loudspeaker
and a piano which appears to do the opposite.
s
(
n
) and
x
2
(
n
)=
g
2
×
100
90
80
70
60
50
40
30
20
10
0
100
200
300
400
500
600
700
800
900
Figure 9.4.
θ
angles as a function of time calculated for the set of
critical bands
