发明名称 |
Method for recording and reproducing electronic watermark information |
摘要 |
<p>At recording of a video signal, with electronic watermark information being embedded therein, on a recording medium, a reference signal which is formed differently from the watermark information is inserted to the video signal. At reproduction of the video signal, the luminance of the watermark information is modified based on the reference signal. <IMAGE></p> |
申请公布号 |
EP0901282(A2) |
申请公布日期 |
1999.03.10 |
申请号 |
EP19980306484 |
申请日期 |
1998.08.14 |
申请人 |
HITACHI, LTD. |
发明人 |
KIMURA, HIROYUKI;ARAI, TAKAO;TAKEUCHI, TOSHIFUMI;YOSHIURA, HIROSHI |
分类号 |
G06T1/00;H04N5/913;(IPC1-7):H04N5/913 |
主分类号 |
G06T1/00 |
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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