发明名称 |
Digital watermark embedding device and digital watermark embedding method |
摘要 |
A digital watermark embedding device uses frame correlation to perform motion detection on an input temporally sequential video signal. Based on detected motion information, when a picture is moving at such a speed that a stationary pattern cannot be visually perceived, the device controls a digital watermark pattern to be stationary, while, when a picture is moving at such a speed that a stationary pattern can be visually perceived, the device moves the digital watermark pattern to follow the motion. This makes it possible to effectively superimpose a digital watermark pattern on the input video signal.
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申请公布号 |
US2003012404(A1) |
申请公布日期 |
2003.01.16 |
申请号 |
US20020162368 |
申请日期 |
2002.06.03 |
申请人 |
MATSUMURA YUUKI;NAKAMURA OSAMU;SOUMA SYUNICHI;KOHASHI TAKASHI |
发明人 |
MATSUMURA YUUKI;NAKAMURA OSAMU;SOUMA SYUNICHI;KOHASHI TAKASHI |
分类号 |
H04N7/08;G06T1/00;G09C5/00;G11B20/10;H04N7/081;(IPC1-7):G06K9/00 |
主分类号 |
H04N7/08 |
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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