基于态函数的离散分数余弦倒谱变换在取证话音信息隐藏中的应用

 随着军事、安全等方面要求的日益增长,语音取证技术成为了语音信号处理和信息安全领域的热点和难点.本文提出了一种基于态函数的分数余弦倒谱变换,并将其应用到取证语音信息隐藏中,通过分析得到分数余弦倒谱变换的第3参数呈现一种独特的高频特性,从而提出了一种基于分数余弦倒谱变换的嵌入方法和过零率检测方法.实验仿真结果表明该方法具有一定的抗干扰能力,为分数余弦倒谱变换应用于取证语音信息隐藏提供了一种新的思路.

Forensic Speech Information Hiding Using Fractional Cosine-Cepstrum Transform

A new idea for forensic speech information hiding using three-cycle fractional cosine-cepstrum transform(3DFCCT) is proposed.We find in our analysis that the 3rd parameter of FRCT presents property of high frequency,then we put forward the low bit embedding and the over zero rate detection method for embedding secret information into speech signal in 3DFCCT domain.Results of simulation indicate that it has certain ability for anti-jamming.The discoveries in our study provide a new thought for application of 3DFCCT in forensic speech information hiding.