Linear predictive coding implementation of digital watermarks
2 Assignments
0 Petitions
Accused Products
Abstract
Z-transform calculations may be used to encode (and/or decode) carrier signal independent data (e.g., digital watermarks) to a digital sample stream. Deterministic and non-deterministic components of a digital sample stream signal may be analyzed for the purposes of encoding carrier signal independent data to the digital sample stream. The carrier signal independent data may be encoded in a manner such that it is restricted or concentrated primarily in the non-deterministic signal components of the carrier signal. The signal components can include a discrete series of digital samples and/or a discreet series of carrier frequency sub-bands of the carrier signal. Z-transform calculations may be used to measure a desirability of particular locations and a sample stream in which to encode the carrier signal independent data.
160 Citations
109 Claims
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1-86. -86. (canceled)
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87. 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 of removing carrier signal independent data from a digital sample stream, comprising:
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receiving a digital sample stream encoded with carrier signal independent data; using linear predictive coding calculations to identify signal components of said digital sample stream; and extracting carrier signal independent data from said digital sample stream. - View Dependent Claims (88, 89, 90, 91)
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92. 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 of analyzing signal components in a digital sample stream, comprising:
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receiving a content signal comprising a digital sample stream; using linear predictive coding calculations to analyze signal components of said digital sample stream, said signal components being characterized by at least one of the following group;
a) a discrete series of digital samples, and b) a discrete series of carrier frequency sub-bands of the content signal; andencoding carrier signal independent data in the signal components of the digital sample stream. - View Dependent Claims (93, 94)
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95. 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 of using linear predictive coding calculations to measure a desirability of locations in a digital signal in which to encode carrier signal independent data, comprising:
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receiving a digital signal; and using linear predictive coding calculations to identify locations in said digital signal which would be desirable for encoding carrier signal independent data, wherein said locations are identified using at least one of the following characteristics of said digital signal;
wave, amplitude, frequency, band energy, and phase energy. - View Dependent Claims (96, 97, 98, 99, 100)
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101. 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 of using linear predictive coding calculations to detect at least one of a plurality of digital watermarks from a content signal, comprising:
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receiving a content signal; using linear predictive coding calculations to identify signal components of said content signal, said signal components being characterized by at least one of the following groups;
a) a discrete series of digital samples, and b) a discrete series of carrier frequency sub-bands of the content signal; anddetecting the at least one of a plurality of digital watermarks from the signal components of the content signal. - View Dependent Claims (102, 103, 104, 105, 106, 107, 108, 109)
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Specification