Encoding and Decoding Signals for Digital Watermarking
First Claim
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1. A method comprising:
- obtaining a media signal;
computing a reduced-bit representation of the media signal;
influencing a digital watermark embedding process with the reduced-bit representation of the media signal; and
embedding a digital watermark in the media signal with the influenced digital watermark embedding process.
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Abstract
This disclosure describes methods and systems for encoding a digital watermark into and/or detecting a digital watermark from a host (or media) signal such as audio, video or imagery. One implementation involves a method of detecting a digital watermark. The method includes: receiving a host signal carrying a digital watermark; computing attributes of the host signal; using the attributes of the host signal to compute a key; and using the key to detect the digital watermark in a transform domain dependent on the key. Other methods, systems and apparatus are provided as well.
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Citations
20 Claims
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1. A method comprising:
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obtaining a media signal;
computing a reduced-bit representation of the media signal;
influencing a digital watermark embedding process with the reduced-bit representation of the media signal; and
embedding a digital watermark in the media signal with the influenced digital watermark embedding process. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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receiving a media signal comprising a digital watermark hidden therein;
computing a reduced-bit representation of the media signal;
influencing detection of a digital watermark detector with the reduced-bit representation of the media signal; and
analyzing the media signal to detect the digital watermark hidden therein with the influenced digital watermark detector. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of detecting a digital watermark comprising:
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receiving a host signal carrying a digital watermark;
computing attributes of the host signal;
using the attributes of the host signal to compute a key; and
using the key to detect the digital watermark in a transform domain dependent on the key. - View Dependent Claims (18, 19, 20)
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Specification