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:
Jul. 05, 2005
Filed:
Jun. 28, 2001
Ryuki Tachibana, Yamato, JP;
Shuhichi Shimizu, Yokohama, JP;
Seiji Kobayashi, Yokohama, JP;
Taiga Nakamura, Tokyo-to, JP;
Ryuki Tachibana, Yamato, JP;
Shuhichi Shimizu, Yokohama, JP;
Seiji Kobayashi, Yokohama, JP;
Taiga Nakamura, Tokyo-to, JP;
International Business Machines Corporation, Armonk, NY (US);
Abstract
The present invention provides a watermarking method, apparatus and system for embedding additive information in digital data, in which one frame is defined as including samples extracted from digital data and a current frame is defined as a frame that is overlapped by samples of a preceding frame. Included are: a transformation unit, for multiplying a frame extracted from digital data by a window function and performing a Fourier transform on the digital data; an embedding unit, for employing bit information and a frequency band to change the amplitude of the frequency component in the digital data; a transformation unit, for performing an inverse Fourier transform to return the frequency component whose amplitude has been changed by the frequency domain embedding unit; and a frame generator, for multiplying the time domain signal and superimposing overlapped frames to generate a frame wherein the additive information is embedded.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile