Audio conference safe secrecy system and method using echo cancellation function

A security and confidentiality, audio conference technology, applied in the field of audio conference security and confidentiality system, can solve the problems of uncontrollability, single sound wave propagation range of eavesdropping means, etc., achieve good restoration effect, ensure normal transmission, and protect information security.

Active Publication Date: 2015-04-22
NAT UNIV OF DEFENSE TECH
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: aiming at the singleness of eavesdropping means and the uncontrollability of the sound wave propagation range that the anti-eavesdropping equipment on the market currently deals with, an audio confe

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Audio conference safe secrecy system and method using echo cancellation function
  • Audio conference safe secrecy system and method using echo cancellation function
  • Audio conference safe secrecy system and method using echo cancellation function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] figure 1 It is an overall structural diagram of the audio conferencing security and confidentiality system of the present invention;

[0032] The audio conference security system consists of two parts: the control system and the venue system. The control system is composed of a processor, M multi-channel earphone distributors, the main controller of the conference system, and a multi-channel audio power amplifier. sequencer. The venue system consists of C speakers, N headphones, and N microphones. N is equal to the number of participants, and C is a positive integer.

[0033] The power sequencer is used to control the power switch of other components in the control system. The power sequencer requires a rated voltage of 220V, a frequency of 50Hz, and at least five three-phase power jacks. The power sequencer is connected to an external 220V 50Hz AC power supply, which supplies power for the processor in the control system, the multi-channel earphone distributor, the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an audio conference safe secrecy system and method using an echo cancellation function. The system is composed of a control system and a meeting place system. The control system is composed of a processor, a multi-path headset distributor, a conference system master controller and a multi-path audio power amplifier. The meeting place system is composed of a loudspeaker box, a headset and a microphone. The processor is provided with two sound cards and audio conference safe secrecy software, wherein the first sound card has the echo cancellation function. The software is composed of a noise playing module, an audio processing module and a pure voice output module. The method includes the steps that the audio conference safe secrecy software plays noise and collects and transmits voice with noises to the first sound card for echo cancellation and noise reduction, and the audio processing module removes residual noise of voice signals subjected to echo cancellation and noise reduction. The audio conference safe secrecy system and method resolve the problems that the anti-eavesdrop measure of anti-eavesdrop equipment is simplex, and the spreading range of sound waves is not controllable, and can effectively guarantee that the conference content is not eavesdropped and communication is not affected.

Description

technical field [0001] The invention relates to the field of audio signals, in particular to an audio conference security system for preventing conference content from being eavesdropped in a conference scene. Background technique [0002] The process of people using speech to communicate is through the vibration of the oral cavity, and the sound is transmitted through the sound transmission channel. If the transmission channel converts the sound into other types of signals (such as: a radio bug converts the sound into an electromagnetic wave signal), then the The transmitted signal is converted into sound, which is finally received by the human ear. Eavesdroppers steal conference voice information by establishing new voice transmission channels. For example, laser eavesdropping is to establish a new sound transmission channel of air-glass-laser-laser receiver-vibration analyzer-speaker to steal the voice information of the conference site. The ease and diversity of sound ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G10L19/018H04M9/08
Inventor 徐伟陈卫东陈皖玉刘奕伶付延昌宋乐唐敏
Owner NAT UNIV OF DEFENSE TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap