摘要
提出了一种新的MIDI隐写算法.该算法减小了在嵌入秘密信息时对原始数据的修改量,减小了隐写对原始数据统计特征的改变,增强了抗隐写分析的能力;在MIDI事件的时间和力度参数中同时嵌入秘密信息,并采用了自适应方法决定每个参数可供秘密信息嵌入的比特位置.实验结果表明,该算法对音质的影响几乎可以忽略;实现了较强的抗隐写分析能力;与传统MIDI隐写算法相比,隐写容量也有了明显提高.
A new steganographic algorithm for MIDI files was proposed.This algorithm achieved a strong anti-steganalysis ability by reducing the modification of the statistical characteristics of orginal data.On the other hand,the algorithm embedded secret messages in both time and velocity parameters,and determined adaptively the position of bits in each parameter for the embedding of secret messages.Experiement results show that the effect of the proposed algorithm on sound quality is almost neglectable and that a strong anti-steganalysis ability is achieved,with the steganography capacity greatly improved compared to the traditonal algorithms.
基金
国家自然科学基金(60772032)资助
关键词
MIDI音频
隐写编码
时间参数
力度参数
自适应
MIDI audio
steganographic encoding
time parameter
velocity parameter
adaptive means
