Patent Document ID: 20050044370
Application ID: 10498962
Patent Status: 0

Claim One:
1. A method of embedding a watermark pattern (W) in an information signal (X) comprising the steps of: determining a robust signature (S) as a set of robust features of said information signal (X), generating a watermark pattern (W) on the basis of a first signature dependent function (f S (·)) applied to a predefined basic watermark pattern (V), embedding said watermark pattern (W) in said information signal (X) resulting in a watermarked signal (Y), where there exist a relationship of said first signature dependent function (f S (·)) and a second signature dependent function (g S (·)) given by that a given detection operation (D) on said watermarked signal (Y) and said first function (f S (·)), applied to said basic watermark pattern (V), i.e. D(Y;f S (V)), corresponds to said detection operation (D) on said second function (g S (·)), applied to said watermarked signal (Y), and said basic watermark (V), i.e. D(g S (Y);V).