李常亮,
李荣
中国民航大学电子信息与自动化学院 天津 300300
基金项目:国家自然基金委员会与中国民航局联合基金(U1933108),天津市 自然科学基金(17JCZDJC30900),天津市教委科研计划项目 (2019KJ117), 2018 年中央高校基本科研业务费项目(3122018D007, 3122018C003)
详细信息
作者简介:吴志军:男,1965年生,教授,博士生导师,研究方向为网络和信息安全
李常亮:男,1993年生,硕士生,研究方向为信息安全
李荣:女,1995年生,硕士生,研究方向为信息安全
通讯作者:吴志军 zjwu@cauc.edu.cn
中图分类号:TN912.3计量
文章访问数:1904
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被引次数:0
出版历程
收稿日期:2018-12-18
修回日期:2019-07-20
网络出版日期:2019-09-20
刊出日期:2020-02-19
Speech Information Hiding Method Based on Random Position Selection and Matrix Coding
Zhijun WU,,Changliang LI,
Rong LI
College of Information Engineering and Automation, Civil Aviation University of China, Tianjin 300300, China
Funds:The Joint Funds of National Natural Science Foundation of China and Civil Aviation Administration of China (U1933108), The Key Program of Natural Science Foundation of Tianjin (17JCZDJC30900), The Scientific Research Project of Tianjin Municipal Education Commission (2019KJ117), The Fundamental Research Funds for the Central Universities of China (3122018D34007, 3122018C003)
摘要
摘要:针对低速率语音编码问题,该文提出基于G.723.1编码标准的信息隐藏算法。在基音预测编码过程中,通过控制闭环基音周期(自适应码本)的搜索范围,该文结合随机位置选择方法(RPS)和矩阵编码方法(MCM),实现秘密信息的嵌入,在语音编码过程中实现了信息的隐藏。RPS方法的采用降低了载体码字之间的关联性,MCM方法的采用降低了载体的改变率。实验结果证明,该文算法下PESQ恶化率平均值最大为1.63%,隐蔽性良好。
关键词:低速率语音编码/
G.723.1编码标准/
基音预测/
闭环基音周期
Abstract:For the low-rate speech encoding problem, an information hidden algorithm based on the G.723.1 coding standard is proposed. In the pitch prediction coding process, by controlling the search range of the closed-loop pitch period (adaptive codebook), combined with the Random Position Selection (RPS) method and the Matrix Coding Method (MCM), the secret information is embedded, which is implemented in the speech coding process. The adoption of the RPS method reduces the correlation between the carrier code-words, and the adoption of the MCM method reduces the rate of change of the carrier. The experimental results show that the average PESQ (Perceptual Evaluation of Speech Quality) deterioration rate under the algorithm is 1.63%, and the concealment is good.
Key words:Low rate speech coding/
G.723.1 coding standard/
Pitch prediction/
Closed loop pitch period
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