Voice information hiding algorithm for dynamic codebook based on complete binary tree grouping

Abstract

VoIP (Voice over Internet Protocol) serving as the Internet communication technology has a huge risk in privacy disclosure. In order to solve the problem of privacy disclosure in VoIP, the voice information hiding technology is gradually applied in the VoIP. The invention proposes a voice information hiding algorithm for a dynamic codebook based on complete binary tree grouping, and the method combines the dynamic codebook of iLBC and the QIM (Quantization Index Modulation) principles, and employs a complete binary tree for the grouping of the dynamic codebook. The algorithm comprises the steps that a transmitter selects a corresponding codebook for coding according to a secret information bit, and achieves the embedding of the secret information; a receiver completes the extraction of the secret information according to the attributes of a codon vector. A development and testing platform is built in a local area network, and the performances (hiding capacity, hiding performance, robustness and processing time delay) of the algorithm are estimated, which indicates that the algorithm is larger in capacity, is higher in hiding performance, is good in robustness, and is short in processing time.

Description

technical field [0001] The invention relates to a new idea of ​​realizing confidential communication—voice information hiding, which fundamentally conceals the fact that secret information exists, and effectively protects user privacy and information security. Background technique [0002] As an Internet communication technology, VoIP (Voice over Internet Protocol) is facing a huge risk of privacy leakage. In order to solve problems such as privacy leakage in VoIP, voice information hiding technology is gradually applied to VoIP. The main fields of information hiding include basic theoretical research, applied basic research and applied technology research. In terms of basic theoretical research, Huang et al. used pitch prediction in low-rate coded speech streams to complete information hiding. Experimental results show that embedding secret The information has little impact on the voice quality of the carrier, the loss value is about 1.2%, and it can ensure better anti-ste...

AI Technical Summary

Problems solved by technology

[0006] In the present invention, aiming at the defects of the currently widely used codebook grouping algorithm, a dynamic codebook is proposed based on a complete binary tree grouping voice information hiding algorithm

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