Method and apparatus for echo data hiding in audio signals

Details Method and apparatus for echo data hiding in audio signals Method and apparatus for echo data hiding in audio signals

1996-05-31

1999-04-06

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Audio signal bandwidth compression or expansion

Delay line

381 63, G10L 302, H03G 300

Patent

active

058930671

ABSTRACT:
A method of hiding information in a host audio signal introduces one or more echoes into the signal. The separation in time between the host signal and an echo is associated with the value of a datum embedded in the signal. The identity of the embedded datum is determined by observing the delay between the host signal and the echo.

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patent: 5636292 (1997-06-01), Rhoads
Gruhl, D. et al, "Echo Hiding", Information Hiding (1996).
Bender, W. et al, "Techniques for data hiding", IBM Systems Journal, vol. 35, No. 3-4, pp. 313-336 (1996).
Bender, W. et al, "Techniques for data hiding", SPIE, vol. 2420, pp. 164-173 (1995).

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