The invention concerns a method and apparatus for embedding and detecting watermarks in a digital host signal. In the embedding method a watermark sequence of length Lw/N bits carrying predetermined information is generated and then up-sampled by a factor N (preferably N=2). At intermediate sampling points of the up-sampled sequence a modified version of the watermark sequence (in preferred arrangements the negative thereof) is inserted to form a compound watermark sequence of length Lw. The compound watermark sequence is then combined with the host signal to watermark the host signal. The invention finds particular advantage in that the need for a spectral whitening stage in the detector is done away with.
申请公布号
EP1668632(A1)
申请公布日期
2006.06.14
申请号
EP20040769915
申请日期
2004.09.01
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.
发明人
VAN DER VEEN, MINNE;LEMMA, AWEKE, N.;APREA, JAVIER, F.;BRUEKERS, ALPHONS, A., M., L.