摘要
在保证良好的透明性和鲁棒性基础上,为了提高隐蔽信息的容量,提出了一种基于听觉掩蔽效应的自适应量化索引调制（QIM）音频信息隐藏算法。该算法首先针对人类听觉感知特性,综合考虑同时掩蔽和后掩蔽效应,独立计算掩蔽阈值,相对于固定划分临界带,嵌入隐蔽信息后,透明性大大提高;其次将量化索引调制应用于音频信息隐藏,相对于经典的音频信息隐藏技术,量化索引调制方法能提高信息隐藏容量。实验表明,量化索引调制方法结合信道编码技术后,能够保证在低误码率的条件下,隐蔽信息容量能达到2500bps。因此,通过该算法嵌入隐蔽信息后的音频文件不仅在隐蔽信息容量上有显著的提高,而且具有很好的透明性,同时也能抵抗一定的攻击,算法在隐蔽信息容量、透明性和鲁棒性达到了很好的平衡。
An adaptive quantitative index modulation（QIM）audio information hiding algorithm based on auditory masking effect is proposed,which not only ensures good transparency and robustness,but also improves the information hiding capacity.Firstly,the algorithm can calculate the masking threshold independently,considering the simultaneous masking and post-masking effects of the human auditory perception characteristics.Compared with the fixed critical band,the transparency is greatly improved.Secondly,the quantitative index modulation is applied to the audio information hiding,which can improve the information hiding capacity compared with the classical audio information hiding technique.Experiments show that the QIM method combined with the channel coding technique can ensure that the hidden information capacity as high as 2 500 bps under the condition of low bit error rate.Therefore,the algorithm is a good balance of high hidden information capacity,good transparency and stong robustness.
作者
周围
田茂
陈小莉
谢桂辉
Zhou Wei;Tian Mao;Chen Xiaoli;Xie Guihui(Electronic Information School, Wuhan University,Wuhan 430072, China;China University of Geosciences,Wuhan 430074, China)
出处
《电子测量技术》
2018年第4期107-111,共5页
Electronic Measurement Technology
基金
中国地质大学(武汉)中央高校基本科研业务费专项资金(CUG160834)项目资助
关键词
信息隐藏
掩蔽效应
QIM
信息容量
编码
information hiding
masking effect
QIM
channel capacity
coding
