General data hiding framework using parity for minimal switching
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United States of America Patent
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Feb 11, 2014
Grant Date -
Feb 19, 2009
app pub date -
Aug 13, 2008
filing date -
Aug 17, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A framework is provided for reducing the number of locations modified when hiding data, such as a digital watermark, in binary data. The framework complements data hiding techniques, such as digital watermarking techniques. After determining potential embedding locations according to an underlying technique, a data structure is created with values associated with those locations. A parity calculation is performed on the values in the data structure. The calculated parity is compared with hidden data to determine locations for modifications. Manipulations are then performed to reduce the total number of modifications needed to represent the hidden data. Modifications are made to the binary data according to the underlying technique. During decoding of the hidden data, the same locations can be determined, the same data structure can be created with the modified values, and a parity calculation is then performed to decode the hidden data.
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