Information Technology Reference
In-Depth Information
TaBLe 10.5
Maximum Error for Different Disks Sizes
ND
(
N
,
ND
)
(
N, ND
)
Maximum Error
D
max
(4, 2)
1
(4, 3)
1
…
1
(4, 9)
1
(4, 10)
1 + 1 + 1 + 1 = 4 = N
(4, 11)
N
16
14
12
10
8
6
Bound on capacity
4
2
0
1
2
3
4
5
6
7
8
9
q
Figure 10.3
Maximum capacity in bits with
D
max
= 1 for various
q.
1.6
1.4
1.2
Upper bound on embedding rate
1
0.8
0.6
0.4
0.2
0
0
2000
4000
6000
8000
10000
Group size
N
Figure 10.4
Upper bound on embedding rate with
D
max
= 1 for group sizes
N.
sizes
ND
influence embedding distortion. We used groups of
N
= 4 with disk
sizes
ND
ranging from 2 to 11. We can see that the maximum embedding rate
with group size
N
= 4 and
D
max
= 1 is log
2
9/4. Figure 10.3 shows the maxi-
mum capacity in bits with
D
max
= 1 for various
q
. It is also very apparent that
the capacity increases very fast with group sizes
N
.
The upper embedding rate bound with
D
max
= 1 for group sizes
N
is given
in Figure 10.4. We can see a very high variability in embedding rate for
