摘要
基于信息隐藏技术 ,提出并实现了一种语音保密通信的新方法。首先将保密语音进行混合激励线性预测 (MELP)编码 ,形成隐藏信息。然后依据人耳的掩蔽效应 ,在公开语音 DCT域中频点嵌入隐藏信息。解码器在同样的嵌入点检测隐藏信息 ,并经 MELP解码恢复保密语音。实验结果表明该算法在隐藏信息后 ,信道中传输的公开语音具有透明性 ,并且在受到压缩、滤波等攻击时具有较高的鲁棒性。
Based on the method of information hiding, a novel algorithm for security speech communication is designed and implemented in this paper. First, Mix Excitation Linear Prediction (MELP) coding is used for security speech. Then according to masking effect, the hiding bit is embedded in the intermediate frequency point of Discrete Cosine Transform (DCT). Detector determines the embedded information, and recovers security speech by MELP decoder. Experiment results show the speech which is embedded with information has transparent feature, and algorithm is strongly robust to many attacks such as compression, filter and so on.
出处
《解放军理工大学学报（自然科学版）》
EI
2002年第6期1-5,共5页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
国家高等学校骨干教师资助计划
