Cryptography Reference
In-Depth Information
(a) p
1
=0,p
2
=0,BCR
1
= 100%, BCR
2
= 100%
(b) p
1
=0.1, p
2
=0.1, BCR
1
=94.12%, BCR
2
=93.60%
(c) p
1
=0.25, p
2
=0.25, BCR
1
=87.50%, BCR
2
=85.64%
(d) p
1
=0.5, p
2
=0.5, BCR
1
=74.30%, BCR
2
=72.08%
Fig. 12.11.
The two extracted watermarks under different channel erasure proba-
bilities in Sec. 12.5.2, with a codebook size of L = 512.
Also, the BCR values in Table 12.3 are acceptable even with heavily erased
channels, and the corresponding watermarks can all be subjectively recog-
nized. The only situation when only one of the channels breaks down, it is
not possible to recognize the second watermark. More importantly, using our
