A method, apparatus and signal for combining two robust watermarks, whereby a low complexity watermark is searched for first, and if not found, a second higher complexity watermark is searched for. The low complexity watermark is robust against a limited set of signal processing that can be expected by a "friendly user" under normal conditions. The second higher complexity watermark is robust against all kinds of malicious attacks.
申请公布号
WO03075272(A3)
申请公布日期
2003.12.04
申请号
WO2003IB00493
申请日期
2003.02.07
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;OOMEN, ARNOLDUS, W., J.;TREFFERS, MENNO, A.