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Internet protocol (IP) voice covert communication method based on adaptive multi-rate wideband (AMR-WB) code rate camouflage

A covert communication and voice technology, applied in telephone communication, interconnection devices, electrical components, etc., can solve the problems that covert information transmission is easily restricted by detection methods and cannot pass through firewalls, etc., and achieves flexible, practical and efficient methods. high effect

Inactive Publication Date: 2013-03-20
SUZHOU INST FOR ADVANCED STUDY USTC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose an IP voice covert communication method based on G722.2 code rate camouflage, which can realize large-capacity covert data transmission on mobile devices, and solves the problem that covert information transmission in the prior art is easily restricted or cannot be detected by detection methods. Through the firewall and other issues

Method used

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  • Internet protocol (IP) voice covert communication method based on adaptive multi-rate wideband (AMR-WB) code rate camouflage
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  • Internet protocol (IP) voice covert communication method based on adaptive multi-rate wideband (AMR-WB) code rate camouflage

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Embodiment

[0033] The covert communication mode of IP voice based on G722.2 code rate camouflage provided by this embodiment realizes the covert transmission function of confidential information, and the confidential information may be ordinary text or other file data.

[0034] figure 1 Provided the function realization structural diagram of the present invention, the concrete realization steps of the present invention are:

[0035] (1) In the preprocessing stage, the sending end determines the speech coding mode suitable for IP calls according to the current network conditions, and selects a coding mode with a low bit rate, denoted as coder A, and its coded data block size is S a ; Select a high bit rate encoding mode, denoted as encoder B, whose encoded data block size is S b ;Calculate the hidden information size S that can be embedded in each speech frame e = S b -S a .

[0036] (2) At the sending end, use encoder A to compress and encode the 16-bit linear PCM voice signal, and ...

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Abstract

The invention discloses an internet protocol (IP) voice covert communication method based on G722.2 code rate camouflage. The G722.2 multi-rate coding characteristic is utilized to fill hidden information in low bit rate data blocks to be camouflaged into high bit rate coding voice frames, and then the high bit rate coding voice frames are encrypted by shortest remaining processing time (SRPT) protocol to be transmitted. The method is simple, convenient and practical, large in hidden information capacity, suitable for large hidden data transmission and suitable for being applied to mobile equipment.

Description

technical field [0001] The invention belongs to the field of safe communication, in particular to the fields of information hiding and IP telephone, in particular to an IP concealed communication method which adopts code rate camouflage technology to hide information in G722.2 coded voice frames. Background technique [0002] Information hiding is a new information security technology, which has developed rapidly in recent years, and can be widely used in the fields of digital information copyright protection, authentication, and covert transmission of confidential information. It uses the insensitivity of human sensory organs (sensory redundancy) and the redundancy of multimedia digital signals (redundancy of data characteristics) to hide information in a publicly available carrier medium without affecting the sensory perception of the carrier medium. Under the premise of effective effect and use value, confidential information will not be detected. Covert communication re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04M7/00
Inventor 黄刘生缪海波陈志立杨威
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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