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...http://www.google.nl/patents/US6778682?utm_source=gb-gplus-sharePatent US6778682 - Redundantly embedding auxiliary data in source signals
Redundantly embedding auxiliary data in source signals
