Steganographic method for covert audio communications

Details Steganographic method for covert audio communications Steganographic method for covert audio communications

2007-06-12

2007-06-12

Swerdlow, Daniel (Department: 2615)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Digital audio data processing system

C380S252000, C370S495000

Reexamination Certificate

active

10768753

ABSTRACT:
Method for embedding a covert message within a digital audio signal. The existence of the covert message is undetectable and the information content of the covert message can be further rendered unascertainable. Covert message data is embedded within a digital audio signal on an audio frame-by-audio frame basis. Covert message data is embedded either at a rate of one bit per frame or two bits per frame. The invention has uses including but not limited to watermarking digital audio signals, hiding data within a digital audio signal, increasing the channel capacity of a communications channel by placing multiple messages within each other, and generally increasing message robustness.

REFERENCES:
patent: 3845391 (1974-10-01), Crosby
patent: 4225967 (1980-09-01), Miwa et al.
patent: 5450490 (1995-09-01), Jensen et al.

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