Optimization methods for the insertion, protection, and detection of digital watermarks in digital data
DCFirst Claim
1. A method for generating a digital watermark message encoded digital data signal, comprising:
- obtaining a digital data signal;
identifying, with a processor, a plurality of candidate bits in said digital data signal;
obtaining a digital watermark message to be encoded; and
encoding said digital watermark message in a first encoding bit set consisting of all or less than all of said plurality of candidate bits.
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Abstract
Disclosed herein are methods and systems for encoding digital watermarks into content signals. Also disclosed are systems and methods for detecting and/or verifying digital watermarks in content signals. According to one embodiment, a system for encoding of digital watermark information includes: a window identifier for identifying a sample window in the signal; an interval calculator for determining a quantization interval of the sample window; and a sampler for normalizing the sample window to provide normalized samples. According to another embodiment, a system for pre-analyzing a digital signal for encoding at least one digital watermark using a digital filter is disclosed. According to another embodiment, a method for pre-analyzing a digital signal for encoding digital watermarks comprises: (1) providing a digital signal; (2) providing a digital filter to be applied to the digital signal; and (3) identifying an area of the digital signal that will be affected by the digital filter based on at least one measurable difference between the digital signal and a counterpart of the digital signal selected from the group consisting of the digital signal as transmitted, the digital signal as stored in a medium, and the digital signal as played backed. According to another embodiment, a method for encoding a watermark in a content signal includes the steps of (1) splitting a watermark bit stream; and (2) encoding at least half of the watermark bit stream in the content signal using inverted instances of the watermark bit stream. Other methods and systems for encoding/decoding digital watermarks are also disclosed.
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Citations
48 Claims
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1. A method for generating a digital watermark message encoded digital data signal, comprising:
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obtaining a digital data signal; identifying, with a processor, a plurality of candidate bits in said digital data signal; obtaining a digital watermark message to be encoded; and encoding said digital watermark message in a first encoding bit set consisting of all or less than all of said plurality of candidate bits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A process for generating a digital watermark message encoded digital signal, comprising:
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obtaining a digital signal; identifying, with a processor, at least one candidate bit of said digital signal; generating a key; and manipulating said at least one candidate bit with said key. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 36)
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27. An article of manufacture comprising a non-transitory machine readable medium, having thereon stored instructions adapted to be executed by a processor, which instructions when executed result in a process comprising:
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obtaining a model for a data signal wherein the model describes watermarking parameters; generating a watermark to be embedded in the data signal; and embedding the generated watermark using the obtained model of the data signal to create a watermarked data signal. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34)
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35. An article of manufacture comprising a non-transitory machine readable medium, having thereon stored instructions adapted to be executed by a processor, which instructions when executed result in a process comprising:
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receiving a data signal; identifying a plurality of candidate bits in the data signal that can be manipulated during encoding; generating at least one watermark; determining which of said plurality of candidate bits to manipulate; and encoding the at least one watermark in the determined candidate bits. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. An article of manufacture comprising a non-transitory machine readable medium, having thereon stored instructions adapted to be executed by a processor, which instructions when executed result in a process comprising:
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receiving a data signal; identifying a plurality of candidate bits in the data signal that can be manipulated during encoding; generating at least one watermark; and encoding said at least one watermark in said plurality of candidate bits. - View Dependent Claims (48)
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Specification