发明名称 |
MARKING OF INFORMATION SIGNAL WITH WATER-MARK |
摘要 |
<p>A multi-bit watermark is detected in a signal (e.g. a video image) in which each bit of the multi-bit value is represented by an embedded watermark subpattern in the signal. The watermark is detected by first detecting the presence of the full watermark in the signal irrespective of its multi-bit value, and then detecting to which extent the presence of subpatterns corresponds with the multi-bit value to be checked.</p> |
申请公布号 |
CZ9901532(A3) |
申请公布日期 |
1999.09.15 |
申请号 |
CZ19990001532 |
申请日期 |
1998.08.17 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N. V. |
发明人 |
LINNARTZ JOHAN POUL MARIE GERARD |
分类号 |
H04N1/387;G06T1/00;G09C5/00;H04N1/00;H04N7/26;(IPC1-7):H04N1/32;H04N5/913 |
主分类号 |
H04N1/387 |
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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