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US 7,177,430 B2Granted
Digital entroping for digital audio reproductions
AssigneePortalPlayer, Inc.
InventorJason Seung-Min Kim
Life of this patent
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AssigneePortalPlayer, Inc.
InventorJason Seung-Min Kim
Estimating the term…
The present invention provides a system and method for introducing white noises into a digital audio signal so that there is progressive and cumulative degradation in audio quality after each successive reproduction of the audio sound signal in a fashion analogous to analog audio reproduction. The invention provides a white noise generator, and a digital entroping unit. In a preferred embodiment, the white noise generator is implemented by a hardware random number generator. The digital entroping unit controls the magnitude of white noise desired based on a random number generated by the random number generator, and adds the white noise to the input audio sound signal to produce a degraded audio sound signal. The magnitude of white noise can be controlled by using various masking and formatting of random number data.
A method for progressive degradation of a digital audio signal to prevent unauthorized reproduction of said digital audio signal comprising:
A computer program product for use in conjunction with a computer system, the computer program product comprising a computer readable storage medium and a computer program mechanism embedded therein, the computer program mechanism comprising:
A method for progressive degradation of a digital audio signal, comprising:
A computer program product for use in conjunction with a computer system, the computer program product comprising a computer readable storage medium and a computer program mechanism embedded therein, the computer program mechanism comprising:
A method for progressive degradation of digital audio signal comprising a plurality of pulse code modulated audio data, wherein said pulse code modulated audio data each comprises a plurality of bits, said method comprising:
A computer program product for use in conjunction with a computer system, the computer program product comprising a computer readable storage medium and a computer program mechanism embedded therein, the computer program mechanism comprising:
A system for progressive quality degradation in reproduction of digital audio signal comprising a plurality of pulse code modulated audio data, said system comprising:
A system for progressive quality degradation in reproduction of digital audio signal comprising a plurality of pulse code modulated audio data, said system comprising:
A method for degrading a digital audio signal input to prevent unauthorized reproduction of said digital audio signal comprising:
A method for progressive degradation of a plurality of digital audio data, comprising:
A computer program product for progressive degradation of a plurality of digital audio data, the computer program product comprising a computer readable storage medium and a computer program mechanism embedded therein, the computer program mechanism comprising:
Dependencies are inferred from the claim text.