Disclosed is a method for the detection of pseudo-symmetric watermarks in
an information signal. The method includes receiving the information
signal, wherein the watermark is embedded in respective sections of the
information signal by tiling a finite number of a plurality of watermark
patterns, accumulating the sections, and correlating the accumulated
sections with a sum of the plurality of watermark patterns. In
particular, the information signal is folded as if there was only a
single basic pattern. The presence of the watermark is then detected by a
cyclic sliding correlating.