语音信息隐藏容量研究  

Capacity Estimation Research for Speech Information Hiding

作　　者：白剑 曹鹏[2] 

机构地区：[1]欧珀移动通信有限公司研发技术部,广东东莞523857 [2]北京印刷学院,北京102600

出　　处：《北京邮电大学学报》2016年第B06期76-80,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金(61170259);北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD20130329)

摘　　要：在现有水印隐藏容量模型研究的基础上,提出了MPEG声心理学模型1掩蔽门限限制下的语音信息隐藏容量和一种能够达到该理论容限的秘密信息编码方法.同时也计算出当采样率为44.1 k Hz的载体语音概率密度函数满足高斯正态分布时,其在MPEG声心理学模型1掩蔽门限限制下的隐藏容量为2 787 bit/s.The article presented a data capacity estimation method for speech information hiding. It uses human auditory system（ HAS） model to estimate the data hiding capacity of speech,or the maximum number of bits that can be embedded in speech. MPEG HAS model 1 was modified to estimate the just noticeable difference（ JND） for FFT and power spectrum density coefficients. At the same time,a new embedded method that can reach the data capacity was introduced. The maximum number of bits was also calculated that can be embedded in speech to 2 787 bit / s when embedded speech is white noise.

关 键 词：语音隐藏 隐藏容量 心理声学模型 

分 类 号：TN911[电子电信—通信与信息系统]