Method for hiding information of speech stream on basis of speech coding by pulse code modulation

Abstract

The invention discloses a method for hiding information of a speech stream on the basis of speech coding by pulse code modulation, and aims to provide a method for hiding information of a speech stream on the basis of a G.711mu-law. By the method, the hidden information transmission safety is improved, and the channel utilization rate is increased. The technical scheme includes that the method comprises steps of constructing a communication system comprising double speed communication parties; constructing four information transmission channels by available insertion positions of modes with the serial numbers from 0 to 3 in the G.711mu-law; designing an information package format; enabling a transmitting end and a receiving end to transmit and receive the information in parallel; preprocessing the information when the transmitting end is about to transmit the information, inserting the hidden information in the speech stream L, dynamically compensating for the tone quality of the speech stream and upwardly or downwardly adjusting the channels according to smoothness conditions of the channels; and enabling the receiving end to synthesize and restore the received information. The method has the advantages that a dynamic channel adjusting mechanism is constructed, the information transmission safety can be improved, bandwidth resources of the channels are sufficiently utilized, and the quality of speech can be improved.

Description

technical field [0001] The present invention mainly relates to the field of information communication based on G.711μ-law (μ system pulse code modulation voice coding, which is a kind of voice compression coding formulated by the International Telecommunication Union), especially a voice stream based on G.711μ-law information hiding methods. Background technique [0002] At present, the security protection of Internet information transmission is mainly to encrypt the content, and the key system adopted is DES (Data Encryption System, Data Encryption Standard) and so on. Although the key system can protect the content, due to the lack of proper protection of the transmission path, potential attackers can destroy the transmission path even if they cannot decipher the transmission content, such as mixing wrong information, intercepting channels, etc., making the information Unable to transfer successfully. [0003] Therefore, it is of great practical significance to study how...

AI Technical Summary

Problems solved by technology

Although information hiding in higher bits improves security, the paper "Network Audio Stream Information Hiding: VoIP-Based Adaptive Steganography Technology" is manually configured for when to use and which available insertion positions, and the fixed mode cannot be based on the network Changes in the environment adjust the insertion position of information, reducing channel utilization

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