Digital entroping for digital audio reproductions
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United States of America Patent
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Feb 13, 2007
Issued Date -
N/A
app pub date -
Oct 31, 2001
filing date -
Oct 31, 2001
priority date (Note) -
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Abstract
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.
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