现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2015年
11期
103-106,111
,共5页
回声隐藏%倒谱%线性卷积%循环卷积%高质量信道
迴聲隱藏%倒譜%線性捲積%循環捲積%高質量信道
회성은장%도보%선성권적%순배권적%고질량신도
echo hiding%cepstrum%linear convolution%cycle convolution%high quality channel
回声信息隐藏是通过在载体语音中嵌入不同延时的回声来实现信息隐藏的一种技术。介绍回声隐藏算法的基本原理，分析回声隐藏法秘密信息提取的关键步骤，即计算隐藏秘密信息后语音的倒谱，并结合线性卷积与循环卷积的关系，推导及总结了在高质量信道上利用回声隐藏法进行隐蔽通信时秘密信息提取出错的原因。分析表明，实际应用中可根据语音在延迟处的倒谱值自适应地调节回声衰减因子的大小，提高回声隐藏法秘密信息恢复的准确率。
迴聲信息隱藏是通過在載體語音中嵌入不同延時的迴聲來實現信息隱藏的一種技術。介紹迴聲隱藏算法的基本原理，分析迴聲隱藏法祕密信息提取的關鍵步驟，即計算隱藏祕密信息後語音的倒譜，併結閤線性捲積與循環捲積的關繫，推導及總結瞭在高質量信道上利用迴聲隱藏法進行隱蔽通信時祕密信息提取齣錯的原因。分析錶明，實際應用中可根據語音在延遲處的倒譜值自適應地調節迴聲衰減因子的大小，提高迴聲隱藏法祕密信息恢複的準確率。
회성신식은장시통과재재체어음중감입불동연시적회성래실현신식은장적일충기술。개소회성은장산법적기본원리，분석회성은장법비밀신식제취적관건보취，즉계산은장비밀신식후어음적도보，병결합선성권적여순배권적적관계，추도급총결료재고질량신도상이용회성은장법진행은폐통신시비밀신식제취출착적원인。분석표명，실제응용중가근거어음재연지처적도보치자괄응지조절회성쇠감인자적대소，제고회성은장법비밀신식회복적준학솔。
Echo information hiding is a technique to realize information hiding by embedding different delay echoes in carrier voice. The basic principle of echo hiding algorithm is introduced. The key steps of secret information extraction with echo hiding method is analyzed,that is the voice cepstrum after calculating the hiding secret information. According to the relation of linear convolution and cycle convolution,the error reasons of secret information extraction when the hiding communication is imple?mented with echo hiding method in high quality channel are deduced and summarized. The accuracy of secret information recovery with echo hiding method is improved by regulating the size of echo decay factor adaptively according to the cepstrum value in delay areas of the voice.
