This invention relates to a method of embedding a watermark pattern with a
payload in a time dependent information signal, comprising the steps of
determining a number of robust signatures in the information signal,
creating the payload being dependent of at least one of the number of
robust signatures and a predefined message, embedding the watermark
pattern according to the payload in the information signal. The invention
also relates to a corresponding method and arrangement for detecting a
watermark pattern in an information signal.