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Patchwork-based stereo audio watermarking against de-synchronization attack

conference contribution
posted on 2012-01-01, 00:00 authored by Iynkaran NatgunanathanIynkaran Natgunanathan, Yong XiangYong Xiang, Tianrui Zong
Audio watermarking schemes using patchworkbased algorithm have good robustness against majority of the watermarking attacks. However, these watermarking schemes are vulnerable to de-synchronization attack. This paper proposes a patchwork-based watermarking scheme for stereo audio signals to address this problem. To improve the robustness, the proposed method exploits the similarities of both channels in the stereo audio signals. Given a stereo audio signal, we first compute the discrete cosine transform (DCT) of both channels, which gives two sets of DCT coefficients. Then DCT segments are formed form DCT coefficients belong to a certain frequency range. The DCT segment formation is determined by a pseudonoise (PN) sequence which acts as a secret key. Then watermark bits are embedded into DCT segments by modifying the DCT coefficients. In the decoding process the secret key is used to extract the watermark bits embedded in the DCT segments. Simulation results illustrate the effectiveness of the proposed method against de-synchronization attack, compared to latest patchwork-based audio watermarking scheme. Besides, the proposed algorithm also gives better robustness against other conventional attacks.

History

Event

Image and Signal Processing. Congress (5th : 2012: Chongqing, China)

Pagination

1601 - 1605

Publisher

IEEE

Location

Chongqing, China

Place of publication

Piscataway, N.J.

Start date

2012-10-16

End date

2012-10-18

ISBN-13

9781467309639

Language

eng

Publication classification

E1 Full written paper - refereed

Title of proceedings

CISP 2012 : Proceedings of the 5th International Congress on Image and Signal Processing