Optimization methods for the insertion, protection, and detection of digital watermarks in digitized data
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0 Petitions
Accused Products
Abstract
The implementations of digital watermarks can be optimally suited to particular transmission, distribution and storage mediums given the nature of digitally-sampled audio, video and other multimedia works. Watermark application parameters can be adapted to the individual characteristics of a given digital sample stream. Watermark information can be either carried in individual samples or in relationships between multiple samples, such as in a waveform shape. More optimal models may be obtained to design watermark systems that are tamper-resistant given the number and breadth of existent digitized sample options with different frequency and time components. The highest quality of a given content signal may be maintained as it is mastered, with the watermark suitably hidden, taking into account usage of digital filters and error correction. The quality of the underlying content signals can be used to identify and highlight advantageous locations for the insertion of digital watermarks. The watermark is integrated as closely as possible to the content signal, at a maximum level to force degradation of the content signal when attempts are made to remove the watermarks.
169 Citations
34 Claims
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1-16. -16. (canceled)
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17. An article of manufacture comprising a 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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analyzing a digital signal to identify potential watermarking locations within the digital signal, which potential watermarking locations are suitable for embedding one or more bits of a watermark message;
using a watermarking key to detect the watermark message from the digital signal at the locations identified by the analyzing step. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A method of decoding a watermark message from a digital signal, comprising:
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analyzing a digital signal to identify potential watermarking locations within the digital signal, which potential watermarking locations are suitable for embedding one or more bits of a watermark message; and
decoding the watermark message from the digital signal using the locations identified by the analyzing step. - View Dependent Claims (25, 26, 27, 28, 29)
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30. An article of manufacture comprising a 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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selecting a sample window in a digital signal having embedded watermarks;
identifying potential watermark locations within the sample window using a perceptual model, which potential watermark locations are capable of carrying one or more bits of a watermark message; and
analyzing at least one sample to determine a portion of the watermark message. - View Dependent Claims (31, 32)
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33. A process for decoding a watermark message from a digital signal, comprising:
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selecting a digital signal having embedded watermarks;
identifying potential watermark locations using a perceptual model, which potential watermark locations are capable of carrying one or more bits of a watermark message; and
analyzing at least a portion of the digital signal to determine a portion of the watermark message.
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34. A system for decoding at least one digital watermark into a signal, comprising:
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a window selector for selecting a sample window in the signal;
an interval calculator for determining a quantization interval of a selected sample window, where the quantization interval may be used to quantize normalized window samples;
a sampler for normalizing the sample window to provide normalized samples, where the normalized samples conform to a limited range of normalized values that are proportional to un-normalized samples, and where the normalized values can be divided by the quantization interval into distinct quantization levels;
a processor for identifying a plurality of optimal locations in the signal for decoding at least a portion of a digital watermark; and
a decoder for decoding one or more portions of a digital watermark from at least one of a plurality of identified optimal locations in the signal.
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Specification
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Current AssigneeWistaria Trading Inc.
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Original AssigneeWistaria Trading Inc.
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InventorsCooperman, Marc S., Moskowitz, Scott A.
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Granted Patent
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Time in Patent OfficeDays
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Field of Search
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US Class Current382/100
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CPC Class CodesG06T 1/0028 Adaptive watermarking, e.g....G06T 1/005 Robust watermarking, e.g. a...G06T 1/0092 Payload characteristic dete...G06T 2201/0064 for copy protection or copy...G06T 2201/0065 Extraction of an embedded w...H04K 1/00 Secret communicationH04L 2209/08 Randomization, e.g. dummy o...H04L 2209/34 Encoding or coding, e.g. Hu...H04L 2209/608 WatermarkingH04N 1/32149 Methods relating to embeddi...H04N 1/32187 with selective or adaptive ...H04N 1/32229 with selective or adaptive ...H04N 1/3232 Robust embedding or waterma...H04N 21/23892 involving embedding informa...H04N 21/8358 involving watermark protect...H04N 2201/3233 of authentication informati...H04N 2201/327 which are undetectable to t...
