Audio conference security system and security method using echo cancellation function

Abstract

The invention discloses an audio conference security system and a security method using the echo cancellation function. The system is composed of a control system and a venue system. The power amplifier is composed of; the venue system is composed of speakers, earphones and microphones. The processor has two sound cards and is equipped with audio conference security software; the first sound card has the function of echo cancellation. The software is composed of noise playback module, audio processing module and pure voice output module. The method is that the audio conference security software plays noise, collects noisy voice and transmits it to the No. 1 sound card for echo cancellation and denoising, and the audio processing module removes residual noise from the voice signal after echo cancellation and denoising. The invention solves the problem that the anti-eavesdropping device has single eavesdropping means and the sound wave propagation range is uncontrollable, and can effectively ensure that the content of the meeting is not eavesdropped and the communication is not affected.

Description

Technical field [0001] The invention relates to the field of audio signals, and particularly refers to an audio conference security and confidentiality system that prevents the content of the conference from being eavesdropped on in a conference scene. Background technique [0002] The process of people using voice to communicate is to produce sound through oral vibration, and the sound is transmitted through the sound transmission channel. If the transmission channel converts sound into other types of signals (such as: a radio bug converts sound into electromagnetic wave signals), then The transmitted signal is converted into sound, which is finally received by the human ear. Eavesdroppers steal conference voice information by establishing a new voice transmission channel. For example, laser wiretapping is the establishment of a new sound transmission channel of air-glass-laser-laser receiver-vibration analyzer-speaker to steal the voice information at the meeting. The ease an...

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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 conferencing security system and confidentiality method are proposed. On the one hand, any eavesdropping means Can effectively ensure that the content of the meeting will not be eavesdropped, on the one hand, the normal communication of the participants will not be affected

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