DEVICE FOR INTRODUCING A WATER SIGN IN THE INFORMATION REPRESENTATION, A DETECTOR FOR DETECTING A WATER SIGN IN THE INFORMATION REPRESENTATION, METHOD AND COMPUTER PROGRAM

摘要

1. A device (500; 700) for embedding a watermark to be embedded in an input information representation (510; 710), characterized in that it includes:! determinant of embedding parameters (520; 750), configured to apply the derivation function once or more to the initial value to obtain an embedding parameter for embedding the watermark to be embedded in the input information representation; and! watermark adder, configured to provide an input information representation with a watermark to be embedded by using the embedding parameter,! where the implementation device is configured to select the number of derivation function applications to the initial value to obtain the implementation parameter,! where the determinant of the embedding parameters (520; 750) is configured to apply the index parameter and determining, depending on the index parameter, how many times the derivation function must be applied to a predetermined initial value in order to obtain the embedding parameter (526; 752); and! where the embedder includes a watermark information detector (730) configured to detect watermark information already contained in the input information representation (510; 710) to obtain information (738) about the number of watermarks already contained in the input informational presentation, and! where the watermark information detector is configured to provide one or more index parameters for the determinant of the implementation parameters based on the information (738