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Robust Data Hiding in Audio Using Allpass Filters

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3 Author(s)
Malik, H.M.A. ; Dept. of Electr. & Comput. Eng., Univ. of Illinois, Chicago, IL ; Ansari, R. ; Khokhar, A.A.

A novel technique is proposed for data hiding in digital audio that exploits the low sensitivity of the human auditory system to phase distortion. Inaudible but controlled phase changes are introduced in the host audio using a set of allpass filters (APFs) with distinct parameters of allpass filters, i.e., pole-zero locations. The APF parameters are chosen to encode the embedding information. During the detection phase, the power spectrum of the audio data is estimated in the z-plane away from the unit circle. The power spectrum is used to estimate APF pole locations, for information decoding. Experimental results show that the proposed data hiding scheme can effectively withstand standard data manipulation attacks. Moreover, the proposed scheme is shown to embed 5-8 times more data than the existing audio data hiding schemes while providing comparable perceptual performance and robustness

Published in:

Audio, Speech, and Language Processing, IEEE Transactions on  (Volume:15 ,  Issue: 4 )

Date of Publication:

May 2007

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