Invention Grant
- Patent Title: Encryption methods for patterned media watermarking
- Patent Title (中): 图案化媒体水印加密方法
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Application No.: US11731454Application Date: 2007-03-30
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Publication No.: US08369562B2Publication Date: 2013-02-05
- Inventor: Thomas Robert Albrecht , Zvonimir Z. Bandic , Jorge Campello de Souza
- Applicant: Thomas Robert Albrecht , Zvonimir Z. Bandic , Jorge Campello de Souza
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Zilka-Kotab, PC
- Main IPC: G06K9/00
- IPC: G06K9/00
Abstract:
Watermarks for patterned magnetic media. The watermarks are used to demonstrate the unauthorized replication of a patterned magnetic media. The watermarks include a dibit, a pattern in an open region, shifting of data, shifting of a sync mark and large length scale perturbations. Also described are methods to determine if a watermark appears on a patterned media.
Public/Granted literature
- US20080239534A1 Encryption methods for patterned media watermarking Public/Granted day:2008-10-02
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