Redundantly embedding auxiliary data in source signals
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United States of America Patent
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Aug 17, 2004
Issued Date -
N/A
app pub date -
Jul 31, 2002
filing date -
Oct 21, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a data hiding method that includes changing values of input pixels corresponding to an input two-dimensional image to encode an N-bit auxiliary data signal therein, thereby yielding encoded output pixels defining an encoded output image. N comprises at least two. The method is characterized in that the N-bit auxiliary data signal is redundantly encoded in the image by at least: changing values of input pixels in a first image location according to a first pattern in order to encode the N-bit auxiliary data signal therein; changing the pattern according to a key to yield a second pattern; and changing values in a second image location according to the second pattern in order to encode the N-bit auxiliary data signal therein.
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