Detection of entropy in connection with audio signals

Details Detection of entropy in connection with audio signals Detection of entropy in connection with audio signals

2000-04-21

2008-12-16

Odom, Curtis B (Department: 2611)

Pulse or digital communications

Spread spectrum

Frequency hopping

C375S340000, C382S232000, C382S233000, C382S247000, C382S251000

Reexamination Certificate

active

07466742

ABSTRACT:
An encoder calculates an entropy of at least a portion of a signal and encodes the signal with the calculated entropy. A decoder decodes the signal in order to recover the encoded entropy. The decoder may also determine an entropy of the signal and may compare the entropy that it determines to the decoded entropy. The decoder detects compression/decompression based upon results from the comparison, and/or the decoder prevents use of a device based upon results from the comparison.

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