Method and apparatus for embedding and reproducing watermark...

Details Method and apparatus for embedding and reproducing watermark... Method and apparatus for embedding and reproducing watermark...

2007-02-06

2007-02-06

Mehta, Bhavesh M. (Department: 2624)

Image analysis

Applications

Reexamination Certificate

active

10029672

ABSTRACT:
An apparatus for embedding a watermark into contents data includes a pattern generating device for generating bits representing a predetermined bit pattern corresponding to a watermark. A specified-bit detecting device operates for detecting bits in original picture data as specified bits into which a watermark can be embedded. A calculating device operates for calculating a desired bit pattern represented by the specified bits in response to the predetermined bit pattern and a specified bit pattern. The desired bit pattern can be converted into the specified bit pattern by given logical operation with the predetermined bit pattern. A mixing device operates for changing the specified bits to represent the desired bit pattern to convert the original picture data into watermark-embedded picture data.

REFERENCES:
patent: 6044182 (2000-03-01), Daly et al.
patent: 6055321 (2000-04-01), Numao et al.
patent: 6122403 (2000-09-01), Rhoads
patent: 6823455 (2004-11-01), Macy et al.
patent: 2002/0099943 (2002-07-01), Rodriguez et al.
“A copyright Information Embedding Method using DCT for Digital Movies” by Ogawa et al.; The 1997 Symposium on Cryptograpy and Informasion Security (SCIS'97-31G); Jan. 29-Feb. 1, 1997; pp. 1-4.
“A Watermarking scheme to image data by PN sequence” by Ohnishi et al.; The 1997 Symposium on Cryptography and Information Security (SCIS'97); Jan. 29-Feb. 1, 2001; pp. 1-8.
McGraw-Hill Concise Encyclopedia of Science & Technology, 4thedition, published 1998.

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