Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-11-29
2005-11-29
Morse, Gregory (Department: 2134)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C380S217000, C725S031000
Reexamination Certificate
active
06971011
ABSTRACT:
Method of detecting a watermark embedded in a signal (S), in which a plurality of frames of the signal (S) is combined to a detection set (Dj) for one detection event. According to the invention, the reliability of watermark detection is enhanced by using non-consecutive frames to form the detection set (Dj). The invention also relates to an apparatus (2) for recording and/or playback of a signal, and to a system for broadcast monitoring, comprising such a watermark detector (24).
REFERENCES:
patent: 3573350 (1971-04-01), Rhee
patent: 4370732 (1983-01-01), Kogge
patent: 5319735 (1994-06-01), Preuss et al.
patent: 5574787 (1996-11-01), Ryan
patent: 5915027 (1999-06-01), Cox et al.
patent: 5933431 (1999-08-01), Ko
patent: 6047317 (2000-04-01), Bisdikian et al.
patent: 6108434 (2000-08-01), Cox et al.
patent: 6131161 (2000-10-01), Linnartz
patent: 6185312 (2001-02-01), Nakamura et al.
patent: 6208745 (2001-03-01), Florencio et al.
patent: 6219837 (2001-04-01), Yeo et al.
patent: 6373960 (2002-04-01), Conover et al.
Hoffman, et al., RFC 2038, “RTP Payload Formal for MPEG1/MPEG2 Video,” 1996.
United States 47 CFR 73.1201, “Station Identification”, 1991 Revision.
Kalker et al., “On the Reloability of Detecting Electronic Watermarks in Digital Images”, Proceddings of Eusipco 1998.
Heneghan Matthew
Koninklijke Philips Electronics , N.V.
Morse Gregory
Thorne Gregory L.
LandOfFree
Watermark detection does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Watermark detection, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Watermark detection will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3463051