摘要
在利用失真测度来描述隐写引起的音频失真时,发现对同一原始音频进行多次直接序列扩频隐写过程中,第一次隐写引起的失真最为剧烈.从直接扩频隐写的原理出发,提出了从待检测音频提取相应失真测度作为特征向量,并利用支持向量机进行分类的隐写分析方法.该方法不需要对原始音频进行估计.实验证明,本方法具有令人满意的性能,对不同嵌入强度也同样有效,同时对嵌入容量的干扰提出2种改善策略.
Given the observation under repeated embedding,the audio distortion is the fiercest for the very first time and drops significantly subsequently,a steganalysis method of DSSS（Direct Sequence Spread Spectrum）was proposed,which is implemented by support vector machine（SVM）as a classifier,using various distortion measures sensitive to DSSS stego-method as features,avoiding estimation of the original signal.The experiment results verify that the proposed method can detect the DSSS embedding effectively and can also work with different embedding strength,and two methods of detection with different embedding capacities were suggested.
出处
《中国科学院研究生院学报》
CAS
CSCD
2008年第2期251-256,共6页
Journal of the Graduate School of the Chinese Academy of Sciences
