一种基于GSM的低码率语音信息隐秘传输方法。

本文描述了一种可将一路低码率2．4kb／s混合激励线性预测(MELP)编码语音信息，隐藏在另一路13kb／s的GSM编码语音中，通过公共信道隐秘传输的方法。文中给出了一种新的数据嵌入方法，该方法以一个单位增广矩阵为基础，可在(2L+1)比特可修改信息中嵌入2L比特数据信息，而最多只需修改￡比特宿主信息，有较高的数据嵌入率，算法计算复杂度较低，较易于硬件实现，且对宿主信息的影响也较少。-GSM-based low bit rate voice covert communication methods. This paper describes a low bit rate can be all the way to 2.4kb/s Mixed Excitation Linear Prediction (MELP) encoded voice information, hidden in another way 13kb/s of GSM encoded voice, through the public channel covert communication methods. The paper gives a new data embedding method to a unit based on the augmented matrix can be (2L+1) bits of information can be modified to embed 2L bits of data information, and a maximum of £　modify the host bits of information , a high data embedding rate, low complexity algorithm, hardware implementation easier, and the impact of information on the host less.