北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2015, Vol. 38 ›› Issue (2): 89-93.doi: 10.13190/j.jbupt.2015.02.016

• 论文 • 上一篇    下一篇

基于MFCC相关系数的语音感知哈希认证算法

李金凤1, 吴涛2, 王宏霞1   

  1. 1. 西南交通大学 信息科学与技术学院, 成都 610031;
    2. 北京邮电大学 信息与通信工程学院, 北京 100876
  • 收稿日期:2014-01-21 出版日期:2015-04-28 发布日期:2015-05-14
  • 作者简介:李金凤(1985—), 女, 博士生, E-mail:jflee85@163. com; 王宏霞(1973—), 女, 教授, 博士生导师.
  • 基金资助:

    国家自然科学基金项目(61170226, 61373180)

Perceptual Hashing Based on Correlation Coefficient of MFCC for Speech Authentication

LI Jin-feng1, WU Tao2, WANG Hong-xia1   

  1. 1. School of Information Science and Technology, Southwest Jiaotong University, Chengdu 610031, China;
    2. School of Information and Communicaiton Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2014-01-21 Online:2015-04-28 Published:2015-05-14

摘要:

提出了一种基于梅尔频率倒谱系数相关性的语音感知哈希内容认证算法. 该算法提取分段语音的声纹梅尔频率倒谱系数作为感知特征. 为提高算法的安全性,算法利用伪随机序列作为密钥,计算得到梅尔频率倒谱系数与伪随机之间的相关度,最后量化相关值并加密生成感知哈希序列. 语音认证过程中,采用相似性度量函数用来衡量哈希序列之间的距离,同时与汉明距离方法进行了比较. 仿真结果表明,该算法对语音内容保持操作,如重采样、MP3压缩等具有较好的鲁棒性,相似性度量函数也对语音篡改检测定位具有较高的灵敏性.

关键词: 感知哈希, 梅尔频率倒谱系数, 语音认证, 相关系数, 篡改检测

Abstract:

A perceptual hashing algorithm for speech content authentication based on correlation coefficient of mel-frequency cepstrum coefficients (MFCC) was proposed. The MFCC of the framed speech signal is extracted as perceptual feature. The correlation coefficients between MFCC and a pseudo-random sequence, which is generated by keys for security, were calculated. Hash sequence is generated by quantifying the correlation coefficients and then scrambling. For audio authentication procedure, a new method, similarity metric, was used to measure the distance of hashes, which is compared with the hamming distance method. Simulations show that the algorithm is robust against content-preserving manipulations such as re-sampling, MP3 compression, and so on. It is very sensitive to tamper of speech by similarity metric.

Key words: perceptual Hashing, Mel-frequency cepstrum coefficients, speech authentication, correlation coefficient, tamper detection

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