发明名称 |
DETECTING A WATERMARK EMBEDDED IN AN INFORMATION SIGNAL |
摘要 |
A watermark embedded in an information signal is detected by correlating said information signal with a plurality of watermarks Wj(n). The respective amounts of correlation C(i,j) are then evaluated to determine the watermark embedded in the signal xi(n). The invention provides a significant improvement of the detection by predictive filtering (25) the information signal and/or predictive filtering (26) the applied watermark prior to the process of correlating the signals.
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申请公布号 |
WO9803014(A1) |
申请公布日期 |
1998.01.22 |
申请号 |
WO1997IB00692 |
申请日期 |
1997.06.12 |
申请人 |
PHILIPS ELECTRONICS N.V.;PHILIPS NORDEN AB |
发明人 |
LINNARTZ, JOHAN, PAUL, MARIE, GERARD |
分类号 |
G06F12/14;G06F21/24;G06T1/00;G09C5/00;H04L9/32;H04N1/387;H04N5/913;H04N7/08;H04N7/081;H04N7/52;(IPC1-7):H04N7/08 |
主分类号 |
G06F12/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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