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Authors: Mehdi Fallahpour 1 ; David Megias 1 and Hossein Najaf-Zadeh 2

Affiliations: 1 Universitat Oberta de Catalunya, Spain ; 2 Advanced Audio Systems and Communications Research Centre Canada (CRC), Spain

Keyword(s): Speech Watermarking, Data Hiding, Wavelet Transform, Logarithm.

Related Ontology Subjects/Areas/Topics: Information and Systems Security ; Information Assurance ; Information Hiding

Abstract: Considering the fact that the human auditory system requires more precision at low amplitudes, the use of a logarithmic quantization algorithm is an appropriate design strategy. Logarithmic quantization is used for the approximation coefficients of a wavelet transform to embed the secret bits. To improve robustness, the approximation coefficients are packed into frames and each secret bit is embedded into a frame. The experimental results show that the distortion caused by the embedding algorithm is adjustable and lower than that introduced by a standard ITU-T G.723.1 codec. Therefore, the marked signal has high quality (PESQ-MOS score around 4.0) and the watermarking scheme is transparent. The capacity is adjustable and ranges from very low bit-rates to 4000 bits per second. The scheme is shown to be robust against different attacks such as ITU-T G.711 (a-law and u-law companding), amplification and low-pass RC filters.

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Paper citation in several formats:
Fallahpour, M.; Megias, D. and Najaf-Zadeh, H. (2012). Adaptive Speech Watermarking in Wavelet Domain based on Logarithm. In Proceedings of the International Conference on Security and Cryptography (ICETE 2012) - SECRYPT; ISBN 978-989-8565-24-2; ISSN 2184-3236, SciTePress, pages 412-415. DOI: 10.5220/0004091704120415

@conference{secrypt12,
author={Mehdi Fallahpour. and David Megias. and Hossein Najaf{-}Zadeh.},
title={Adaptive Speech Watermarking in Wavelet Domain based on Logarithm},
booktitle={Proceedings of the International Conference on Security and Cryptography (ICETE 2012) - SECRYPT},
year={2012},
pages={412-415},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004091704120415},
isbn={978-989-8565-24-2},
issn={2184-3236},
}

TY - CONF

JO - Proceedings of the International Conference on Security and Cryptography (ICETE 2012) - SECRYPT
TI - Adaptive Speech Watermarking in Wavelet Domain based on Logarithm
SN - 978-989-8565-24-2
IS - 2184-3236
AU - Fallahpour, M.
AU - Megias, D.
AU - Najaf-Zadeh, H.
PY - 2012
SP - 412
EP - 415
DO - 10.5220/0004091704120415
PB - SciTePress

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