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

doi:10.19682/j.cnki.1005-8885.2018.0019

JOURNAL OF CHINA UNIVERSITIES OF POSTS AND TELECOM ›› 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

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

Abstract

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

CLC Number:

TN918.91

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

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