Transmarking of multimedia signals

A method of transmarking a media signal previously embedded with a first digital watermark using a first digital watermark embedding method, comprising:

• detecting the first digital watermark in the media signal;
• converting the media signal to a different format;
• embedding 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 new format.

A transmarker for transmarking a media signal previously embedded with a first digital watermark using a first digital watermark embedding method, comprising:

• means for detecting the first digital watermark in the media signal;
• means for embedding 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 survive the transformation process.

A transmarker for transmarking a media signal previously embedded with a first digital watermark using a first digital watermark embedding method, comprising:

• means for detecting the first digital watermark in the media signal;
• means for converting the media signal to a different format;
• means for embedding 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 new format.