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1. 发明授权

US06246775B1 Method and appartus for superposing a digital watermark and method and apparatus for detecting a digital watermark 有权
标题翻译：用于叠加数字水印的方法和应用，以及用于检测数字水印的方法和装置
公开(公告)号：US06246775B1
公开(公告)日：2001-06-12
申请号：US09152293
申请日：1998-09-14
申请人： Takeshi Nakamura , Kazumi Sugaya , Yoshiaki Oriyama
发明人： Takeshi Nakamura , Kazumi Sugaya , Yoshiaki Oriyama
IPC分类号： G06K900
CPC分类号： H04N19/467 , G06T1/0064 , G06T1/0071 , G06T2201/0052 , G06T2201/0061 , G06T2201/0065 , H04N1/32149 , H04N1/32165 , H04N1/32203 , H04N1/32208 , H04N1/32352 , H04N19/60 , H04N21/23892 , H04N21/8358 , H04N2201/3233 , H04N2201/327
摘要： An apparatus for superposing a digital watermark for superposing digital watermark information on an information data signal bearing original information, superposes digital watermark information on an information data signal bearing original information, for each unit block consisting of a group of pieces of information data. This apparatus is provided with an auxiliary embedding circuit 10 for embedding second digital watermark information in the information data; a blocking circuit 12 for dividing into the unit blocks the changed information data signal obtained by the auxiliary embedding circuit; and a main embedding circuit 20 for embedding first digital watermark information in the changed information data signal for each of the divided blocks. The second digital watermark information bears information for identifying the position of the divided unit block in a predetermined section of the information data signal. On the basis of the second watermark information, a detecting apparatus effects proper blocking with respect to the information data signal with the watermark embedded therein, so as to detect the first watermark information.
摘要翻译：对于由一组信息数据组成的每个单位块，叠加用于将数字水印信息叠加在承载原始信息的信息数据信号上的数字水印的装置，叠加有承载原始信息的信息数据信号的数字水印信息。该装置设置有用于在信息数据中嵌入第二数字水印信息的辅助嵌入电路10; 分块电路12，用于将由辅助嵌入电路获得的改变的信息数据信号分成单元; 以及用于将第一数字水印信息嵌入到用于每个分割块的改变的信息数据信号中的主嵌入电路20。第二数字水印信息承载用于识别信息数据信号的预定部分中的划分的单位块的位置的信息。基于第二水印信息，检测装置对嵌入有水印的信息数据信号进行适当的阻塞，以检测第一水印信息。

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