中国邮电高校学报(英文版) ›› 2018, Vol. 25 ›› Issue (3): 71-79.doi: 10.19682/j.cnki.1005-8885.2018.0019

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Steganography algorithm for adaptive multi-rate wideband speech based on algebraic codebook search

阮烨1,徐艳艳1,柯登峰2,苏开乐3   

  1. 1. 北京林业大学
    2. 中国科学院自动化研究所
    3.
  • 收稿日期:2018-02-17 修回日期:2018-05-23 出版日期:2018-06-29 发布日期:2018-06-30
  • 通讯作者: 徐艳艳 E-mail:xuyanyan@bjfu.edu.cn
  • 基金资助:
    模型检测动态认识逻辑;大山雀鸣声自动识别

Steganography algorithm for adaptive multi-rate wideband speech based on algebraic codebook search

  • Received:2018-02-17 Revised:2018-05-23 Online:2018-06-29 Published:2018-06-30

摘要: With the popularity of adaptive multi-rate wideband (AMR-WB) audio in mobile communication, many AMR-WB based techniques, such as a similar compression architecture to transmit secret information during the process of compression, were proposed to transmit covert messages. However, if a sender does not have the original WAV audio, the architecture cannot be used. In this paper, a new covert message method, which takes effect after WAV audio is compressed into AMR-WB speech, is proposed. This method takes advantage of algebraic codebook search. Aiming at improving speed and reducing search space, it does not perform algebraic codebook search using the optimal search algorithm, and it does not reach the positions of non-zero pulses via depth-first tree search that characterizes the energy of audio. According to the features of search methods and the codebook index construction, every track in each subframe is analyzed to find the proper positions for embedding secret information. Experimental results show that the proposed method has satisfactory capacity and simplicity regardless of compression process.

关键词: steganography algorithm, WAV audio, compressed audio, adaptive multi-rate wideband speech

Abstract: With the popularity of adaptive multi-rate wideband (AMR-WB) audio in mobile communication, many AMR-WB based techniques, such as a similar compression architecture to transmit secret information during the process of compression, were proposed to transmit covert messages. However, if a sender does not have the original WAV audio, the architecture cannot be used. In this paper, a new covert message method, which takes effect after WAV audio is compressed into AMR-WB speech, is proposed. This method takes advantage of algebraic codebook search. Aiming at improving speed and reducing search space, it does not perform algebraic codebook search using the optimal search algorithm, and it does not reach the positions of non-zero pulses via depth-first tree search that characterizes the energy of audio. According to the features of search methods and the codebook index construction, every track in each subframe is analyzed to find the proper positions for embedding secret information. Experimental results show that the proposed method has satisfactory capacity and simplicity regardless of compression process.

Key words: steganography algorithm, WAV audio, compressed audio, adaptive multi-rate wideband speech

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