Method and apparatus for embedding and reproducing watermark into and from contents data
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United States of America Patent
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-
Feb 6, 2007
Grant Date -
Aug 8, 2002
app pub date -
Dec 31, 2001
filing date -
Feb 6, 2001
priority date (Note) -
In Force
status (Latency Note)
Importance
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.
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