The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2008
Filed:
Jan. 29, 2004
Kiyoshi Kohiyama, Kawasaki, JP;
Hiroshi Komazaki, Kawasaki, JP;
Kiyoshi Kohiyama, Kawasaki, JP;
Hiroshi Komazaki, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
At every reproduction of a moving image, a tamper resistant module (TRM) randomly selects any one of plural electronic watermark inserting modules, and incorporates the module selected into an area randomly selected from among plural non-operation (NOP) areas in an MPEG expansion module. The module can be switched for each image in a series of the moving images. Since an algorithm for inserting the electronic watermark differs for each moving image or each image, elimination of the electronic watermark by means of analysis, particularly, complete elimination from all the images, is extremely difficult.