prov:value
| - The apparatus of claim 27, wherein the comparator compares a reliability of each bit of the first and second watermarks as follows: W_final(i)=func{MAX(C ???1(i),C ???2(i),C ???3(i), . . . ,C ??? j(i), . . . ,C ??? J(i))}, W_j(i) is each bit of the extracted watermarks, i is a value between 1 and 1, j is a value between 1 and J, J is a number of extracted watermarks, I is a number of bits in each
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