发明授权
US08582900B2 Digital watermark embedding device, computer-readable recording medium, and digital watermark detecting device and computer-readable recording medium 有权
数字水印嵌入装置,计算机可读记录介质和数字水印检测装置以及计算机可读记录介质

Digital watermark embedding device, computer-readable recording medium, and digital watermark detecting device and computer-readable recording medium
摘要:
An digital watermark embedding device including an interface unit configured to acquire content in a digital form and digital watermark information, the device includes, a codeword generating unit configured to generate a base codeword including a bit sequence including the digital watermark information; a shifting unit configured to generate a plurality of correcting codewords differing from one another by permutating an arrangement in the bit sequence included in the base codeword depending on a plurality of shift amounts, the plurality of shift amounts differing from one digital watermark information to another, under a predetermined permutation rule; and a watermark superimposing unit configured to embed the plurality of correcting codewords in the content.
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