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:
Feb. 28, 2012
Filed:
May. 11, 2011
Takao Nakamura, Yokohama, JP;
Susumu Yamamoto, Yokohama, JP;
Ryo Kitahara, Yokohama, JP;
Takashi Miyatake, Shinagawa-ku, JP;
Atushi Katayama, Setagaya-ku, JP;
Hisato Miyachi, Yokohama, JP;
Takao Nakamura, Yokohama, JP;
Susumu Yamamoto, Yokohama, JP;
Ryo Kitahara, Yokohama, JP;
Takashi Miyatake, Shinagawa-ku, JP;
Atushi Katayama, Setagaya-ku, JP;
Hisato Miyachi, Yokohama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A digital watermark embedding method of the present invention includes: a step of sequentially obtaining each frame image of the moving image data and frame display time; a step of generating a watermark pattern using watermark information, the frame display time and watermark pattern switching information; a step of superimposing the watermark pattern onto the frame image, and combining watermark embedded frame images obtained by sequentially repeating the processes to generate watermark embedded moving image data. A digital watermark detection method includes a step of sequentially obtaining a frame image; a step of generating a difference image between the currently obtained frame image and a previously obtained frame image; and a step of performing digital watermark detection from the difference image to output digital watermark detection status, and when digital watermark detection process is continued, obtaining a new frame again to repeat the above processes.