Transmarking of multimedia signals
First Claim
1. A method comprising:
- transmarking a media signal by acts of;
detecting a first digital watermark in the media signal, the media signal being embedded with the first digital watermark using a first digital watermark embedding method;
embedding detected message information from the first digital watermark into a second digital watermark in the media signal before the media signal undergoes a transformation process such that the second digital watermark is adapted to parameters or characteristics associated with i) the transformation process or ii) with the media signal so as to better survive the transformation process relative to at least the first digital watermark.
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Abstract
A method of transmarking a watermarked media signal to adapt the watermark to the robustness and perceptibility constraints of a new environment. This transmarking method detects the first digital watermark in the media signal. It then embeds message information from the first digital watermark into a second digital watermark in the media signal before the media signal undergoes a transformation process. The second digital watermark is adapted to survive the transformation process. A variation of this method detects the first digital watermark in the media signal, converts the media signal to a different format, and embeds message information from the first digital watermark into a second digital watermark in the converted media signal. The second digital watermark is adapted to robustness or perceptibility parameters associated with the new format.
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Citations
20 Claims
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1. A method comprising:
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transmarking a media signal by acts of; detecting a first digital watermark in the media signal, the media signal being embedded with the first digital watermark using a first digital watermark embedding method; embedding detected message information from the first digital watermark into a second digital watermark in the media signal before the media signal undergoes a transformation process such that the second digital watermark is adapted to parameters or characteristics associated with i) the transformation process or ii) with the media signal so as to better survive the transformation process relative to at least the first digital watermark. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of transmarking a media signal comprising:
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detecting a first digital watermark in the media signal, the first digital watermark being embedded in the media signal using a first digital watermark embedding method; converting the media signal to a different format; embedding detected message information from the first digital watermark into a second digital watermark in the converted media signal such that the second digital watermark is adapted to robustness or perceptibility parameters associated with the different format. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A transmarker for transmarking a media signal previously embedded with a first digital watermark using a first digital watermark embedding method, comprising:
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means for detecting the first digital watermark in the media signal; means for embedding detected message information from the first digital watermark into a second digital watermark in the media signal before the media signal undergoes a transformation process such that the second digital watermark is adapted to parameters or characteristics associated with i) the transformation process or ii) with the media signal so as to better survive the transformation process relative to at least the first digital watermark.
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20. A transmarker for transmarking a media signal, comprising:
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means for detecting a first digital watermark in the media signal, the first digital watermark being embedded in the media signal using a first digital watermark embedding method; means for converting the media signal to a different format; means for embedding detected message information from the first digital watermark into a second digital watermark in the converted media signal such that the second digital watermark is adapted to robustness or perceptibility parameters associated with the different format.
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Specification