发明名称 |
Digital watermark embedding device, digital watermark detection device, digital information distribution device, and storage medium |
摘要 |
A digital watermark embedding device by which digital data is assumed to be an embedding target and the digital watermark is embedded, has spread spectrum section to set the embedding target to be a unit spreading block which performs the spread spectrum of the spreading block in which the embedding target includes more than two adjacent basic unit of each bases which constructs the plurality of basic units, multiplies the same pseudo-random number signal is multiplied to the embedding target more than two the basic units in the unit spreading block, and perform the spread spectrum of the embedding target, and watermark embedding section to embed the digital watermark in the embedding target to which the spread spectrum is performed by the spread spectrum section.
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申请公布号 |
US6768807(B1) |
申请公布日期 |
2004.07.27 |
申请号 |
US20000533767 |
申请日期 |
2000.03.23 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
MURATANI HIROFUMI |
分类号 |
H04N1/387;G06K9/00;G06T1/00;G09C5/00;H04N7/08;H04N7/081;(IPC1-7):G06K9/00 |
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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