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:
Aug. 18, 2009
Filed:
Jun. 08, 2004
Isao Echizen, Yokohama, JP;
Takao Arai, Yokohama, JP;
Hiroyuki Kimura, Hiratsuka, JP;
Takaaki Yamada, Osaka, JP;
Yasuhiro Fujii, Fujisawa, JP;
Isao Echizen, Yokohama, JP;
Takao Arai, Yokohama, JP;
Hiroyuki Kimura, Hiratsuka, JP;
Takaaki Yamada, Osaka, JP;
Yasuhiro Fujii, Fujisawa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
At least one kind of control signal concerning control of contents, added to specific locations inside contents data, is detected as first control information, and at the same time, at least one kind of control information concerning control of contents, embedded inside the contents data by a digital watermark, is detected as second control information. Consistency between the first control information as detected, and the second control information as detected is determined and on the basis of results of the determination, the control of the contents is executed. Thus, it is possible to reduce a possibility of the contents being improperly copied, thereby enabling the control with assurance of still higher safety.