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IEEE International Conference on Multimedia and Expo Workshops (ICMEW)

作者： Wang, Su Hu, Roland Yu, Huimin Zheng, Xia Damper, R. I. Zhejiang Univ Dept Informat Sci & Elect Engn Hangzhou 310027 Peoples R China Zhejiang Univ Dept Culture Heritage & Museol Hangzhou 310027 Peoples R China Univ Southampton Dept Elect & Comp Sci Southampton SO17 1BJ Hants England

ISBN: (纸本)9781479916047

This paper presents a biometric watermarking algorithm to augment remote multimodal recognition by embedding voice characteristics into face images. We embed both a fragile watermark for tampering detection, as well as a robust watermark to represent the GMM parameters extracted from voice. We show that the proposed scheme can detect tampering, and is also robust to various watermarking attacks. Person verification experiments on the XM2VTS database indicate the validity of combining face and voice classifiers.

关键词： Face recognition speaker recognition Digital watermarking quantization index modulation

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Digital watermarking algorithm research of color images based on quaternion Fourier Transform

Digital watermarking algorithm research of color images base...

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8th Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR) - Multispectral Image Acquisition, Processing, and Analysis

作者： An, Mali Wang, Weijiang Zhao, Zhen Beijing Inst Technol Beijing 100081 Peoples R China

ISBN: (纸本)9780819498021

A watermarking algorithm of color images based on the quaternion Fourier Transform (QFFT) and improved quantization index algorithm (QIM) is proposed in this paper. The original image is transformed by QFFT, the watermark image is processed by compression and quantization coding, and then the processed watermark image is embedded into the components of the transformed original image. It achieves embedding and blind extraction of the watermark image. The experimental results show that the watermarking algorithm based on the improved QIM algorithm with distortion compensation achieves a good tradeoff between invisibility and robustness, and better robustness for the attacks of Gaussian noises, salt and pepper noises, JPEG compression, cropping, filtering and image enhancement than the traditional QIM algorithm.

关键词： quaternion Fourier Transform quantization index modulation distortion compensation color image digital watermark

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A High-rate Chaotic Secured Covert Channel based on Multiple Embedding in Images

A High-rate Chaotic Secured Covert Channel based on Multiple...

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8th International Conference on Computer Engineering and Systems (ICCES)

作者： Seleym, Ashraf October 6 Univ Fac Engn Dept Elect Commun Engn Cairo Egypt

ISBN: (纸本)9781479900800

Covert channel is a type of secure communications that provides reliable security in transferring information between entities. quantization index modulation (QIM) technique can be used to embed data in images to implement covert communication channels. In single embedding in QIM, each sample is quantized once to carry a single bit of the secret message. Double embedding in QIM was introduced by Sarkar and Manjunath in 2009, to increase the transferred data rate where a single sample is quantized twice to carry two bits in time. In this paper, a higher data transmission rate covert channel is developed using multiple embedding in the QIM framework with multi quantization vectors. This approach considers the embedding process as a communications problem, that it uses a structured scheme of Multiple Trellis-Coded quantization jointed with Multiple Trellis-Coded modulation (MTCQ/MTCM) to generate the stego-space. This technique returns a PSNR >= 40 dB. More over, increasing the coding states and/or the coding multiplicity returns an altered space with low correlated coefficients, thus improving the transferred data detection error rate performance. To secure the modulation process, the altered coefficients are chaotic scrambled by the 2-D Arnold Cat Map before embedding to increase the uncertainty in case of an attacker discovered the channel.

关键词： image communications multiple trellis coded modulation quantization index modulation chaotic mapping

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SCALABLE AUDIO CODING USING WATERMARKING

SCALABLE AUDIO CODING USING WATERMARKING

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IEEE International Conference on Multimedia and Expo Workshops (ICMEW)

作者： Movassagh, Mahmood Kabal, Peter McGill Univ Dept Elect & Comp Engn Montreal PQ Canada

ISBN: (纸本)9781479900152

A scalable audio coding method is proposed using a technique, quantization index modulation, borrowed from watermarking. Some of the information of each layer output is embedded (watermarked) in the previous layer. This approach leads to a saving in bitrate while keeping the distortion almost unchanged. This makes the scalable coding system more efficient in terms of Rate-Distortion. The results show that the proposed method outperforms the scalable audio coding based on reconstruction error quantization which is used in practical systems such as MPEG-4 AAC.

关键词： Scalable coding quantization index modulation Watermarking Entropy coding

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Use of Linear Error-Correcting Subcodes in Flow Watermarking for Channels with Substitution and Deletion Errors

Use of Linear Error-Correcting Subcodes in Flow Watermarking...

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14th IFIP-TC 6 and TC-11 International Conference on Communications and Multimedia Security (CMS)

作者： Assanovich, Boris Puech, William Tkachenko, Iuliia YK State Univ Grodno BELARUS Univ Montpellier 2 CNRS LIRMM UMR 5506 F-34095 Montpellier 5 France Authenticat Ind Montpellier France

ISBN: (纸本)9783642407796;9783642407789

An invisible flow watermarking QIM scheme based on linear error-correcting subcodes for channels with substitution and deletion errors is proposed in this paper. The evaluation of scheme demonstrates similar to known scheme performance but with lower complexity as soon as its implementation is mainly based on linear decoding operations.

关键词： Flow watermarking inter-packet-delay deletion and substitution errors linear error-correcting codes VT-codes quantization index modulation

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Real-time video watermarking system on the compressed domain for high-definition video contents: Practical issues

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DIGITAL SIGNAL PROCESSING 2012年第1期22卷 190-198页

作者： Lee, Min-Jeong Im, Dong-Hyuck Lee, Hae-Yeoun Kim, Kyung-Su Lee, Heung-Kyu Korea Adv Inst Sci & Technol Dept Elect Engn & Comp Sci Taejon 305701 South Korea Kumoh Natl Inst Technol Sch Comp & Software Engn Gumi Gyeongbuk South Korea Cornell Univ Weill Med College Ithaca NY 14853 USA

Everyday, we encounter high-quality multimedia contents from HDTV broadcasting, DVD, and high-speed Internet services. These contents are, unhappily, processed and distributed without protection. This paper proposes a practical video watermarking technique on the compressed domain that is real-time and robust against video processing attacks. In particular, we focus on video processing that is commonly used in practice such as downscaling resolution, framerate changing, and transcoding. Most previous watermarking algorithms are unable to survive when these processings are strong or composite. We extract low frequency coefficients of frames in fast by partly decoding videos and apply a quantization index modulation scheme to embed and detect the watermark. On an Intel architecture computer, we implement a prototype system and measure performance against video processing attacks frequently occur in the real world. Simulation results show that our video watermarking system satisfies real-time requirements and is robust to protect the copyright of HD video contents. (C) 2011 Elsevier Inc. All rights reserved.

关键词： Real-time video watermarking Robust video watermarking Practical video watermarking quantization index modulation Copyright protection

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A Hybrid Approach of DWT and DCT for Rational Dither modulation Watermarking

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CIRCUITS SYSTEMS AND SIGNAL PROCESSING 2012年第2期31卷 797-811页

作者： Liu, Jinhua She, Kun Univ Elect Sci & Technol China Sch Engn & Comp Sci Chengdu 611731 Peoples R China

In this paper, on the basis of the theories and methods of Watson's perceptual model and rational dither modulation (RDM), a hybrid quantization-based watermarking in the discrete wavelet transform (DWT) and discrete cosine transform (DCT) domains is studied. In the design of the quantization-based watermarking, quantization step-size plays an important role in many watermarking algorithms. RDM at both the embedder and decoder adopts a gain-invariant adaptive quantization step-size. Therefore, we investigated combining the modified Watson's perceptual model with RDM. Its improved robustness is due to the embedding in the high entropy region of low-frequency sub-band image and adaptive control of its quantization step-size. The Euclidean distance decoder is used to extract the watermark data. The performance of the proposed scheme is analytically calculated and verified by simulation. Experimental results confirm the imperceptibility of the proposed watermarking and its higher robustness against attacks compared to alternative watermarking methods in the literature.

关键词： Image watermarking Rational dither modulation quantization index modulation JPEG compression Wavelets

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A robust audio watermarking scheme based on lifting wavelet transform and singular value decomposition

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SIGNAL PROCESSING 2012年第9期92卷 1985-2001页

作者： Lei, Baiying Soon, Ing Yann Zhou, Feng Li, Zhen Lei, Haijun Nanyang Technol Univ Sch Elect & Elect Engn Singapore 639798 Singapore Georgia Inst Technol George W Woodruff Sch Mech Engn Atlanta GA 30332 USA Shenzhen Univ Coll Comp Sci & Technol Shenzhen Peoples R China

In this paper, a new and robust audio watermarking scheme based on lifting wavelet transform (LWT) and singular value decomposition (SVD) is proposed. Specifically, the watermark data is efficiently inserted in the coefficients of the LWT low frequency subband taking advantage of both SVD and quantization index modulation (QIM). The use of QIM renders our scheme blind in nature. Furthermore, the synchronization code technique is also integrated into our hybrid LWT-SVD audio watermarking method. Experimental and analysis results demonstrate that the proposed LWT-SVD method is not only robust against both general signal processing attacks and desynchronization attacks but also achieve a very good tradeoff between robustness, imperceptibility and payload. Comparisons with the typical and related audio watermarking algorithms also show that our proposed method outperforms most of the selected algorithms. (C) 2012 Published by Elsevier B.V.

关键词： Audio watermarking Lifting wavelet transform Robust watermarking Singular value decomposition quantization index modulation

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A joint encryption/watermarking algorithm for verifying the reliability of medical images: Application to echographic images

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COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE 2012年第1期106卷 47-54页

作者： Bouslimi, Dalel Coatrieux, Gouenou Roux, Christian Telecom Bretagne Dept Image & Traitement Informat F-29238 Brest France INSERM U650 Lab Traitement Informat Med F-29238 Brest France

In this paper we propose a joint encryption/watermarking algorithm for the purpose of protecting medical images. The proposed solution gives access to the outcomes of the image integrity and of its origins as its attachment to one patient even if the image is stored encrypted. In this study, the given solution combines the RC4 stream cipher and two substitutive watermarking modulations: the Least Significant Bit Method and the quantization index modulation. If watermarking and encryption are conducted jointly at the protection stage, watermark extraction and decryption can be applied independently. Experimental results achieved on 8 bits encoded echographic images illustrate the overall performances of the proposed scheme. At least, a capacity rate of 1 and 0.5 bits of message per pixel of image can be embedded in the spatial and the encrypted domains respectively, with a peak signal to noise ratio greater than 49 dB. (C) 2011 Elsevier Ireland Ltd. All rights reserved.

关键词： Medical image security Watermarking quantization index modulation Stream cipher

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Performance analysis and improvement of dither modulation under the composite attacks

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EURASIP JOURNAL ON ADVANCES IN SIGNAL PROCESSING 2012年第1期2012卷 1-19页

作者： Zhu, Xinshan Ding, Jie Yangzhou Univ Sch Informat Engn Yangzhou 225009 Peoples R China State Key Lab Digital Publishing Technol Beijing 100871 Peoples R China Beihang Univ State Key Lab Software Dev Environm Beijing 100191 Peoples R China

The first goal of this article is to analyze the performance of dither modulation (DM) against the composite attacks including valumetric scaling, additive noise and constant change. The analyzes are developed under the assumptions that the host vector and noise vector are mutually independent and both of them have independently and identically distributed components. We derive the general expressions of the probability density functions of several concerned signals and the decoding error probability. The specific theoretical results are provided for the case of generalized Gaussian host and noise. Based on the analyzes, the performance of DM is predicted for different scenarios with a high degree of accuracy and evaluated for different distribution models of host and noise signals. Numerical simulations confirm the validity of the given theoretical analyzes. Then, we address to improve the robustness of DM against valumetric scaling plus constant change. The normalized dither modulation (NDM) is presented, which works by constructing a gain-invariant vector with zero mean for quantization. Performance analysis shows that NDM is theoretically invariant to valumetric scaling and constant change and achieves similar performance to DM in other aspects. The performance of NDM is further improved by weighting the quantization errors. Experiments on real images also show the advantage of NDM over DM subject to amplitude scaling and constant change.

关键词： digital watermarking quantization index modulation composite attacks valumetric scaling constant change

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