Lattice-Based Minimum-Distortion Data Hiding

Lattice-Based Minimum-Distortion Data Hiding
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基于格的最小失真数据隐藏

DOI:
10.1109/lcomm.2021.3089542
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发表时间:
2021-05
期刊:
IEEE COMMUNICATIONS LETTERS
影响因子:
--
通讯作者:
Wang Jiabo
Wang Jiabo
中科院分区:
其他
文献类型:
--
作者:
Lin Jieni;Qin Junren;Lyu Shanxiang;Feng Bingwen;Wang Jiabo

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格被认为是数据隐藏的强大工具。虽然传统的研究和应用侧重于实现最佳的鲁棒性与失真权衡,但在某些应用中,例如医学/生理信号中的数据隐藏,主要关注的是实现覆盖信号的最小失真。在这封信中,我们回顾了著名的量化指标调制(QIM)方案,并提出了它的最小失真版本,称为MD-QIM。MD-QIM的关键是将数据点仅移动到由消息索引的格点的Voronoi区域的边界,以满足后续的正确解码。在任何固定的码率下,该方案通过牺牲对加性高斯白噪声(AWGN)攻击的鲁棒性来实现最小的失真。仿真结果证实,我们的方案在均方误差(MSE)、峰值信噪比(PSNR)和残差百分比(PRD)方面明显优于QIM。
Lattices have been conceived as a powerful tool for data hiding. While conventional studies and applications focus on achieving the optimal robustness versus distortion tradeoff, in some applications such as data hiding in medical/physiological signals, the primary concern is to achieve a minimum amount of distortion to the cover signal. In this letter, we revisit the celebrated quantization index modulation (QIM) scheme and propose a minimum-distortion version of it, referred to as MD-QIM. The crux of MD-QIM is to move the data point to only the boundary of the Voronoi region of the lattice point indexed by a message, which suffices for subsequent correct decoding. At any fixed code rate, the scheme achieves the minimum amount of distortion by sacrificing the robustness to the additive white Gaussian noise (AWGN) attacks. Simulation results confirm that our scheme significantly outperforms QIM in terms of mean square error (MSE), peak signal to noise ratio (PSNR) and percentage residual difference (PRD).
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