发明授权
- 专利标题： Digital watermark embedding device, digital watermark detection device, digital information distribution device, and, storage medium
- 专利标题（中）： 数字水印嵌入装置，数字水印检测装置，数字信息分配装置和存储介质
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申请号： US09533767申请日： 2000-03-23
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公开(公告)号： US06768807B1公开(公告)日： 2004-07-27
- 发明人: Hirofumi Muratani
- 申请人： Hirofumi Muratani
- 优先权： JP11-080268 19990324
- 主分类号： G06K900
- IPC分类号： G06K900
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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