计算机应用 ›› 2010, Vol. 30 ›› Issue (8): 2272-2274.

• 典型应用 • 上一篇    

基于扩频的音频信息隐藏算法的性能分析

马文君1,陈砚圃2,高悦2,闵刚3   

  1. 1. 西安通信学院
    2. 西安通信学院基础部电子信息研究室
    3.
  • 收稿日期:2010-01-18 修回日期:2010-03-29 发布日期:2010-07-30 出版日期:2010-08-01
  • 通讯作者: 马文君

Performance analysis for audio information hiding algorithm based on spread spectrum

  • Received:2010-01-18 Revised:2010-03-29 Online:2010-07-30 Published:2010-08-01
  • Contact: MA WenJun

摘要: 基于扩频的音频隐藏算法一般都采用阈值相关法进行检测,但感知整形过程往往会破坏伪随机序列的正交性。为削弱盲提取时原始载体信号所导致相关噪声的影响,通过分析音频信号、伪随机序列和信道的统计特性,推导出接收信号的数学期望和方差,并给出了正确检测时各参数间的约束关系。最后,通过仿真实验验证了以上结论的正确性。

关键词: 扩频, 音频信息隐藏, 音频信号, 伪随机序列

Abstract: Audio information hiding algorithm based on spread spectrum is generally detected by correlation threshold, but the orthogonal of pseudorandom sequence is always destroyed by perception reshaping. In order to reduce the correlation noise induced by original signal, this paper analyzed the statistical characteristics of audio signal, pseudorandom sequence and channel, and derived the mathematical expectation and variance, and gave out the connection of these parameters. Finally, the results from the simulation and experiment prove that these expressions are correct.

Key words: spread spectrum, audio information hiding, audio signal, pseudorandom sequence