发明授权
US08605939B2 Electronic watermark embedding method, device, and program, and electronic watermark detecting method, device, and program
有权
电子水印嵌入方法，装置和程序，以及电子水印检测方法，装置和程序
- 专利标题： Electronic watermark embedding method, device, and program, and electronic watermark detecting method, device, and program
- 专利标题（中）： 电子水印嵌入方法，装置和程序，以及电子水印检测方法，装置和程序
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申请号： US13301881申请日： 2011-11-22
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公开(公告)号： US08605939B2公开(公告)日： 2013-12-10
- 发明人: Susumu Yamamoto , Takao Nakamura
- 申请人： Susumu Yamamoto , Takao Nakamura
- 申请人地址： JP Tokyo
- 专利权人： Nippon Telegraph and Telephone Corporation
- 当前专利权人： Nippon Telegraph and Telephone Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, L.L.P.
- 优先权： JP2006-061745 20060307
- 主分类号： G06K9/00
- IPC分类号： G06K9/00 ; H04N7/167
摘要：
A digital watermark embedding apparatus for embedding information, as digital watermark, into an input signal having dimensions equal to or greater than N (N is an integer equal to or greater than 2) and a digital watermark detection apparatus for detecting the digital watermark are disclosed. The digital watermark embedding apparatus generates an embedding sequence based on embedding information, generates a N−1-dimensional pattern based on the embedding sequence, generates N-dimensional embedding pattern by modulating a periodic signal according to a value on the N−1-dimensional pattern, and superimposing the embedding pattern in the input signal and outputs it. The digital watermark detection apparatus measures a component of a predetermined periodic signal in a direction of a dimension of the input signal to obtain a N−1-dimensional pattern, obtains a detection sequence from values of the N−1 dimensional pattern, and detects embedded digital watermark based on a size of correlation value between the detection sequence and an embedding sequence.
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