华侨大学学报（自然科学版）Issue(3)：277-282,6.DOI:10.11830/ISSN.1000-5013.2014.03.0277
一种基于 G．729a 语音的信息隐藏方法
An Information Hiding Method Based on G.729a Speech
摘要
Abstract
For G.729a speech codec widely used in VoIP systems,a one-by-one bit flipping test for G.729a speech is car-ried out,and the available bits for steganography (least significant bits)are correspondingly obtained based on perceptual evaluation of speech quality.To combine with matrix encoding,an information hiding approach based on G.729a speech is proposed.The approach is tested and evaluated with a large number of speech samples as the carriers.Experimental re-sults demonstrate that the proposed approach can provide a relatively high hiding capacity (8 bits/frame),higher embed-ding efficiency (2.678),good imperceptibility (the average PESQ score is 3.593)and nice real-time performance that meets the requirement of VoIP systems well.关键词
信息隐藏/隐写/IP 语音/G.729a/矩阵编码Key words
information hiding/steganography/voice over internet protocol/G.729a/matrix encoding分类
信息技术与安全科学引用本文复制引用
郭舒婷,田晖..一种基于 G．729a 语音的信息隐藏方法[J].华侨大学学报（自然科学版）,2014,(3):277-282,6.基金项目
国家自然科学基金资助项目（61302094，61370007，61202468）；福建省科技创新平台建设基金资助项目（2012H2002）；福建省自然科学基金资助项目（2011J05151，2013J01241）；福建省中青年教师教育科研资助项目（JA13012）；华侨大学中青年教师科研提升资助项目（ZQN-PY115）；中央高校基本科研业务费专项资金资助项目（JB-ZR1220）；华侨大学高层次人才科研启动项目 （）
