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US Patent 7944795 Holographic recording medium and encoding/decoding method thereof

Patent 7944795 was granted and assigned to Industrial Technology Research Institute on May, 2011 by the United States Patent and Trademark Office.

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Patent abstract

A holographic recoding medium is provided, having holographic pages. Each page has reference mark (RM) placement areas at fixed locations for placing RM patterns. The reference marks are used to calibrate data images of data areas each of which is enclosed by at least three RM regions. Hidden information of the medium is stored by an specific encoded pattern based on existence, types and arrangements of the RM marks.

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