Image analysis – Applications
Reexamination Certificate
2005-07-05
2005-07-05
Johns, Andrew W. (Department: 2621)
Image analysis
Applications
Reexamination Certificate
active
06915001
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.
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Kobayashi Seiji
Nakamura Taiga
Shimizu Shuhichi
Tachibana Ryuki
Herzberg Louis P.
Johns Andrew W.
Nakhjavan Shervin
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