一种基于短时能量自适应的回声隐藏算法  

Adaptive algorithm of echo hiding based on short-time energy computing

作　　者：唐升[1] 侯榆青[1] 克兢[2] 

机构地区：[1]西北大学信息科学与技术学院,西安710127 [2]空军工程大学电讯工程学院,西安710077

出　　处：《计算机应用》2008年第11期2824-2826,共3页journal of Computer Applications

基　　金：国防基础科研项目(A3220061163)

摘　　要：在前后向双核回声隐藏思想的基础上,提出了一种基于声音信号短时能量自适应的回声隐藏算法,根据不同音段的短时能量自适应调整回声核衰减系数的大小,并且在隐藏信息提取的过程中引入了功率倒谱检测法。改进后的算法具有良好的鲁棒性,不可感知性更高,隐藏效果更好。An adaptive algorithm of echo hiding based on short-time energy computing was proposed in this paper. The original audio was first divided into segments, and the energy of each segment was computed. The decay rate of echo kernel was adaptively adjusted according to the energy of each segment. And the detection of the secret information took the advantage of a power cepstrum computing method. The experimental results show that the improved method is robust to many attack operations and a significant improvement in imperceptibility is achieved.

关 键 词：回声隐藏 短时能量 自适应 功率倒谱 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]