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Method and system for scrambling and descrambling audio ...
https://www.freepatentsonline.com/5058159.html#:~:text=Audio%20signals%20are%20scrambled%20by%20inverting%20the%20original%3B,the%20band%20are%20shifted%20to%20the%20lower%20end.
Time-domain scrambling of audio signals in Matlab
https://www.ee.columbia.edu/~dpwe/resources/matlab/scramble/
Time-domain scrambling of audio signals in Matlab These routines scramble an audio file by moving around short, overlapping windows within a local window. They can be used to create new versions of existing recordings that preserve the …
Audio scrambling - Everything2.com
https://everything2.com/title/Audio+scrambling
Scrambling audio usually refers to somehow garbling a sound signal being transmitted over some insecure medium (like a phone line, a walkie-talkie, cassette tape, etc) and ungarbling the sound at the receiving end, so that the intended recepient can …
Time-domain scrambling of audio signals - File Exchange ...
https://www.mathworks.com/matlabcentral/fileexchange/29396-time-domain-scrambling-of-audio-signals
These routines scramble an audio file by moving around short, overlapping windows within a local window. They can be used to create new versions of existing recordings that preserve the spectral content over longer time scales, but remove structure at shorter timescales. This can be useful e.g. for making speech unintelligible.
US5668879A - Audio scrambling system for scrambling and ...
https://patents.google.com/patent/US5668879A/en
One audio scrambling system according to the prior art is described in U.S. Pat. No. 5,091,941 (filed Oct. 31, 1990, Ser. No. 607,988). This audio scrambling system scrambles the signal by...
MICROPROCESSOR-BASED ANALOG VOICE SCRAMBLING …
https://repository.arizona.edu/bitstream/handle/10150/613892/ITC_1979_79-11-2.pdf;sequence=1
achieving an analog scrambled signal compatible with the 3 kHz nominal audio bandwidth of the existing radio and telephone channels. Also, workable algorithms used for microprocessor-based analog voice scrambling in frequency as well as in time domain are described. Tape recordings of the voice scrambled and recovered with these algorithms are
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