Audio ScramblingTechniques

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Audio Scrambling
Techniques

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Time Segment Permutation(TSP)

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Scrambler without synchronization

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Blind Source Separation

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Two-dimensional

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Frequency Inversion

with Block TSP

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Dynamic-time reverberation

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Time-shifting of the frequency sub-bands

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Time-Frequency segment permutation (TFSP)

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PAPER: A.Srinivasan, P.Arul Selvan: “A Review of Analog Audio Scrambling Methods f
or Residual Intelligibility”. Innovative Systems Design and Engineering w
2222-1727 ISSN 2222-2871 (Online) Vol 3, No 7, 2012

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Sample-amplitude

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Sample Interchange

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Linear addition of PR Noise

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Uniform Permutation

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PR Permutation

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Chaotic Encryption

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Frequency domain

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Frequency Inversion

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Band-splitting with

Frequency Inversion

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Frequency Inversion

followed by cyclic band-shift