Raising detectability of additonal data in a media signal having few frequency components

摘要

The present invention relates to a methods, devices, a media signal as well as an information storage medium related to embedding additional data in a media signal. A first adding unit ( 12 ) mixes the media signal (x) with a noise signal (n) in order to provide a modified media signal (x+n), and a combiner unit ( 14 ) combines additional data (w) with the modified media signal (x+n) through multiplying the modified media signal with the additional data in order to provide a host modifying media signal (m_w). In this way the additional data can be detected with a higher certainty in an output signal (y) if the media signal (x) includes few frequency components.