Patent Number: 7,613,320

Title: Digital watermark embedding apparatus and method, and digital watermark analysis apparatus, method and program

Abstract: A digital watermark embedding apparatus comprises below units. A first generation unit generates a plurality of symbol sequences each of which includes a plurality of symbols including ranks, each of the ranks being uniquely numbered among each of the symbol sequences, each of the symbol sequences uniquely corresponding to each of a plurality of identification information items to be embedded as digital watermark information into each of copies of digital contents. A second generation generates a plurality of to-be-embedded codes corresponding to each of the symbols in each of the symbol sequences. An embedding unit embeds the to-be-embedded codes in each of the copies.

Inventors: Muratani; Hirofumi (Kawasaki, JP)

Assignee: Kabushiki Kaisha Toshiba

International Classification: G06K 9/00 (20060101)

Expiration Date: 1/03/02017