Speech Information Hiding Algorithm Based on Complete Binary Tree Dynamic Codebook Grouping

Wu Zhijun,Sha Yongpeng,Li Changliang

doi:10.1109/access.2019.2945050

Wu Zhijun, Sha Yongpeng + Show 1 more

Open Access

https://doi.org/10.1109/access.2019.2945050

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Abstract

In order to protect the data security and privacy of Voice over Internet Protocol (VoIP), a new algorithm for speech information hiding is proposed based on complete binary tree dynamic codebook grouping (CBTDCG). The algorithm uses the quantization index modulation (QIM) method to divide the dynamic codebook into two parts (corresponding to the embedded secret information bits `0' and `1' respectively), and adopts the complete binary tree to achieve the optimal grouping. The utility of complete binary tree makes the algorithm have the characteristics of fast search and high accuracy. The sender selects the corresponding code word according to the secret information bits for embedding the secret information into carrier speech. At the receiving end, the secret information bits are extracted according to the features of the code word vectors by the receiver. The experimental results show that the hidden capacity of the algorithm is larger than 450bps and the loss of the PESQ is less than 4%. Verification shows that the algorithm possesses a good robustness with a low bit error rate after being interfered by noise and the speech stream carrying secret information has better imperceptibility.

Highlights

As one of the most innovative technologies in the history of communications, Voice over Internet Protocol (VoIP) has brought great benefits
Committed to reducing the computational complexity of the algorithm, this paper proposes an information hiding algorithm based on complete binary tree dynamic codebook grouping
Since the construction of the complete binary tree is similar to the codebook grouping in speech information hiding, this paper proposes a speech information hiding algorithm based on the complete binary tree dynamic codebook grouping (CBTDCG)

Summary

INTRODUCTION

As one of the most innovative technologies in the history of communications, VoIP has brought great benefits. The main issues of VoIP include the security of communication data and the leakage of sensitive information [2]. The security risks of VoIP are mainly shown in three aspects [3]. It is based on the open architecture of the Internet, which uses the Transmission Control Protocol / Internet Protocol (TCP/IP). Risks of VoIP will inevitably cause various security issues to the network, cloud and mobile terminals [4]. The traditional data encryption technology plays an important role in ensuring the information security. Information hiding is a form of secret communication. It transforms the focus of secret communication from signal to the channel. Zhijun et al.: Speech Information Hiding Algorithm Based on CBTDCG information hiding has gradually become a hot topic in recent years

RELATED WORKS

A COMPRESSION DOMAIN HIDING METHOD BASED ON COMPLETE BINARY TREE

EXPERIMENT AND ANALYSIS OF THE RESULTS

Findings

CONCLUSION