An electronic watermark data insertion apparatus comprises an insertion information memory (39) for preliminarily storing insertion information for designating electronic watermark data to be inserted block by block and an electronic watermark data insertion unit (33) for inserting, on the basis of the...http://www.google.fr/patents/US7159117?utm_source=gb-gplus-shareBrevet US7159117 - Electronic watermark data insertion apparatus and electronic watermark data detection apparatus
Electronic watermark data insertion apparatus and electronic watermark data ...
