Water-mark embedding method and system

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United States of America Patent

PATENT NO 6728408
SERIAL NO

09144467

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Abstract

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A data embedding method and apparatus and a data reproducing method and apparatus are provided which can apply a digital watermark to various contents. Instead of embedding watermarking information in respective pixels or by using a relation between pixels, the watermarking information is embedded as a position pattern of changed pixels in the contents. Reliability comparable with conventional techniques can be obtained irrespective of a change in a smaller number of pixels for the contents.

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Patent Owner(s)

Patent OwnerAddress
HITACHI LTD6-6 MARUNOUCHI 1-CHOME CHIYODA-KU TOKYO 1008280 ?1008280

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Arai, Takao Yokohama, JP 141 2154
Echizen, Isao Yokohama, JP 29 508
Nakamura, Masafumi Yokohama, JP 71 1044
Takeuchi, Toshifumi Tokyo, JP 122 1431
Yoshiura, Hiroshi Tokyo, JP 72 2920

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