CAJ | 학술논문

为了解决在压缩音频中实现高透明性、大容量信息隐藏的问题,提出了一种新的基于MPEG音频编码的盲检测隐写算法,首先通过对可变长码字(VLC)配对,实现对原始码字空间的扩展,然后利用码字映射规则完成秘密信息的嵌入.该算法能够保持隐写前后的压缩音频文件大小不变,隐写过程中不需要对MPEG音频进行完全解码.实验结果表明,所提出算法计算复杂度低,同时可获得较高的隐藏容量和良好的不可感知性.
위료해결재압축음빈중실현고투명성、대용량신식은장적문제,제출료일충신적기우MPEG음빈편마적맹검측은사산법,수선통과대가변장마자(VLC)배대,실현대원시마자공간적확전,연후이용마자영사규칙완성비밀신식적감입.해산법능구보지은사전후적압축음빈문건대소불변,은사과정중불수요대MPEG음빈진행완전해마.실험결과표명,소제출산법계산복잡도저,동시가획득교고적은장용량화량호적불가감지성.
A new steganography algorithm for MPEG encoded audio is proposed to solve the problem of embedding a mass of data in compressed audios inaudibly.The algorithm firstly expands codeword space by pairing the original variable length codes(VLCs),and then the secret information is embedded into the VLC pairs with code mapping rules.It can keep the original size of audio file and need not fully decode the MPEG audio.The experiment results show that the proposed algorithm can obtain higher hidden data capacity and good imperceptibility while keeping low computing complexity.