KR20080091543A - A conference system with encrypted voice - Google Patents

A conference system with encrypted voice Download PDF

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Publication number
KR20080091543A
KR20080091543A KR1020070034509A KR20070034509A KR20080091543A KR 20080091543 A KR20080091543 A KR 20080091543A KR 1020070034509 A KR1020070034509 A KR 1020070034509A KR 20070034509 A KR20070034509 A KR 20070034509A KR 20080091543 A KR20080091543 A KR 20080091543A
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KR
South Korea
Prior art keywords
voice
speaker
noise
headset
encrypted voice
Prior art date
Application number
KR1020070034509A
Other languages
Korean (ko)
Inventor
옥은호
Original Assignee
옥은호
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 옥은호 filed Critical 옥은호
Priority to KR1020070034509A priority Critical patent/KR20080091543A/en
Publication of KR20080091543A publication Critical patent/KR20080091543A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/15—Conference systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2410/00—Microphones
    • H04R2410/05—Noise reduction with a separate noise microphone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2420/00—Details of connection covered by H04R, not provided for in its groups
    • H04R2420/07—Applications of wireless loudspeakers or wireless microphones

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)

Abstract

A conference system using encrypted voice signals is provided to improve a security level of the conference system by preventing the conference from being intercepted by encrypting voice signals in a random order. A conference system using encrypted voice signals includes headsets(13a,13b) and a main body(12). When one participant(16) of the participants(14,15) is not allowed to record or listen to the communication of the conference, the participants are required to wear the headsets. A microphone and a speaker of the headset are connected to the main body of the conference system. A surround speaker(10) generates a noise. The participants perform the conference in a noisy space(11). When the headset fails to support a noise canceling function, the wearer of the headset is not allowed to listen to the communications between other parties.

Description

A conference system with encrypted voice

1 is an example of using the encrypted voice conferencing system of the present invention

Figure 2 is a headset wearing encrypted voice conference system of the present invention

3 is a diagram of an encrypted voice conferencing system of the present invention.

4 is an exemplary waveform diagram of a general human voice

5 is a conceptual diagram of encrypted speech extraction according to the present invention.

Literature information of the prior art includes Korean Patent No. 10-0631863 "Sound Device and Headphones" US Patent No. 4071710 "Communication recorder system".

TECHNICAL FIELD The present invention relates to an eavesdropping device that makes it impossible to eavesdrop or record voices in a conference room. Conventional techniques for preventing eavesdropping have been to find electronic devices for various eavesdropping or to disturb the radio waves to prevent eavesdropping.

In addition, as a device for reducing ambient noise, there is a headphone capable of noise canceling by generating a phase sound source by grasping the ambient sound into a microphone to grasp the phase, amplitude, and frequency characteristics of the noise.

Generating ambient noise sources by turning on a radio or TV to prevent eavesdropping and recording is a classic way of distinguishing between voice and voice patterns by digital voice sampling and filtering. There is a limit to eavesdropping.

However, navigating around to remove eavesdropping equipment, blocking sound completely outside, lowering the dialogue voice and causing ambient noise, or texting important conversations is very useful but unnatural and incomplete. There is this.

The intercom system used in the conventional broadcasting production is a wired / wireless device that enables conversation between headset wearers even at the noisy performance site. However, the intercom system is nothing more than a communication device without noise control, external eavesdropping, and recording for field noise.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide an encrypted voice conferencing system that accurately recognizes voices between talkers during a meeting, and eliminates the risk of eavesdropping, recording, and neighboring people who should not attend the meeting.

The configuration of the present invention comprises an encrypted voice conference system, an encrypted voice output device, and an encrypted voice storage device.

In FIG. 1, when there are participants 14 and 15 who will participate in a meeting in a private meeting to be kept confidential, and a participant 16 who will not be able to grasp the content of the conversation, the talker will have a headset 13a of the encrypted voice conferencing system. , 13b) and connecting the microphone and the speaker of the headset to the main body 12 of the encrypted voice conferencing system and proceeding with the meeting can solve the problem of unauthorized eavesdropping and recording.

The talker proceeds to the meeting in the space where the noise 11 is generated through the speaker 10 generating the ambient noise, and when the headset does not wear a noise canceling headset, the talker cannot hear the conversation. It is preferable that the speaker for noise generation is made of a product that can reproduce the same voice as that of a real speaker.

In Fig. 2, the headset 13 of the encrypted voice conferencing system is composed of headphones with three microphones and two speakers surrounding the ear.

The voice 20 of the talker 14 picks up the voice most closely via the directional voice delivery microphone 21 of the headset and delivers it to the encrypted voice conferencing system body, and the microphones 22 at both ears of the headset It receives the noise and delivers it to the main body and merges it with the noise source to reflect the characteristics of distance, frequency, phase, amplitude, etc., and outputs the optimal antiphase electrical signal to the headset for noise canceling.

In FIG. 3, when noise is generated by the noise generating device, noise is generated at an appropriate sound pressure in the noise generating speaker 10. At this time, the speaker A 14 and the speaker B 15 receive ambient noise through the microphone A1 and the microphone B1 provided at both sides of the ear of the headset and transmit the ambient noise to the main body. At the same time, the conversation contents are input through the microphones A2 and B2 of the mouth, and the conversation contents of the other party are canceled and transmitted to the speaker A and the speaker B of the headset.

In general, when covering the ears with a headset, a large amount of ambient noise is blocked, and when only the microphone input of the microphone close to the mouth is amplified and transmitted to the amplifier, there is no problem in conversation. At this time, if you wear the headset with your ears covered, you will not be able to monitor your voice with your own ears, which is unnatural.You can amplify your voice in the main body and send it to the other party. The output from the headset speaker is a natural conversation.

In FIG. 4, when looking at a waveform by digitally recording a general voice, the voice waveform 40 is limited in a specific frequency band. In addition, the voice print (voice print) that is characteristic of the voice of the speaker is clearly displayed, and the content of the conversation can be extracted even in a noisy environment when digitally analyzing the contents of the conversation during eavesdropping and recording.

In FIG. 5, the encrypted voice output apparatus of the present invention samples and stores syllables for grasping the voice print of the speaker's voice 50, and substitutes random random numbers in the order of concatenating sentences again, but has no real-time meaning. Voice noise 51 having the same frequency, tone, and the like is generated in the dialogue space as a speaker.

The syllable ABCD is extracted in order, but when the syllables are arranged by assigning random numbers, it is difficult to predict the syllables by BADC 52.

  The number of syllables to be sampled can be extracted in the dictionary conversation with the difficulty of encryption stage to secure enough syllables, or to increase the number of syllables to increase the encryption stage by real-time sampling in the dialogue. In addition, when the voice storage device is secured in a large capacity, when the encrypted voice noise 51 is generated based on the accumulated voice files, eavesdropping or recording becomes very difficult.

In addition, according to the voice level, tone, and town pressure of the talker, the encrypted voice can also be changed in height, tone, and sound pressure to generate the most appropriate noise that is difficult to hear the conversation in real time, thereby keeping secrets from eavesdropping and recording.

The encrypted voice storage device of the present invention, when digitally recording the voice file as shown in Fig. 5, segments the continuous voice file into appropriate units of seconds, generates random numbers, shuffles them, and stores them as an encrypted voice file that cannot be understood by a general player. do. When segmenting the voice, it is segmented by considering the voice pattern and the height of the wavelength. When rearranged, the encrypted voice is naturally connected to prevent the point of segmentation. At the same time, the location and sequence of the voice segment used in the file encryption process are separately stored and stored as an encryption file, and if necessary, the two files can be merged and decrypted before being heard.

As an example of an encrypted voice storage device, the voice is automatically divided into seconds into a digital voice storage device such as a general portable mp3 player or a voice record, a random number is generated, shuffled, stored as a single encrypted voice file, and a separate encryption order is used. If the cable is synchronized to the digital record device of the real-time storage, and when the recording is finished, separate the two devices to be stored separately can be kept confidential.

When using an encrypted voice conferencing system with the effects of the present invention, it is possible to keep voice secrets, and to communicate clearly through a headset, enabling clear communication, and generating an encrypted voice noise composed of a voice print of a speaker, It is impossible to decipher during recording, which keeps confidentiality and allows smooth meetings.

Claims (6)

Noise is generated through the speaker installed at the conversation place, and the distance, phase, amplitude, and frequency characteristics of the noise speaker and the speaker are compared by comparing the original sound of the generated speaker noise with the field noise collected through the microphone of the headset ear. To reduce ambient noise by simultaneously outputting an inverse electric signal to the speaker's headset speaker for noise cancellation, while simultaneously receiving a conversational voice through the microphone in the mouth of the headset, Encrypted voice conferencing system characterized by having a main body that can be delivered to both participants simultaneously and cleanly in both directions and a plurality of headsets that can be plugged in It is a noise generating device used in a conference room that requires voice encryption.It extracts the syllables that can identify the voice text by recording the voice of the talker before and during the meeting, separates and stores them as digital voice files, and generates random numbers in the separated syllables. Rearranged into meaningless speech sentences that cannot be heard by sorting, and outputting to the speaker in real time the noise of the appropriate height, tone, and sound pressure, which is difficult to overhear the conversation, according to the height, tone, and sound pressure of the current conversation voice. Encrypted voice output device Records real-time conversations with an encrypted voice storage device, breaks them in seconds, encrypts them according to the random number generation order, and stores them as digital voice files.At the same time, the segment position and sort order data of the encryption process are stored as separate files. Encrypted voice storage device, characterized in that the voice file can be played only after merging the two files through a decryption process The headset of an encrypted voice conference system according to claim 1, wherein the main body of the encrypted voice conference system and the voice input and output are wirelessly connected to the headset of the encrypted voice conference system. 2. The encrypted voice conferencing system of claim 1, wherein the encrypted voice conferencing system has a chairman function that allows the chairman to arbitrarily control the headset speaker volume and the microphone input of the individual user. [4] The encrypted voice storage output device according to claim 2 and 3, wherein the encrypted voice storage device and the output device are compact and easy to carry and move by integrally equipped with a microphone, a speaker, an encrypted voice storage and an encrypted voice output device.
KR1020070034509A 2007-04-09 2007-04-09 A conference system with encrypted voice KR20080091543A (en)

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Application Number Priority Date Filing Date Title
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KR1020070034509A KR20080091543A (en) 2007-04-09 2007-04-09 A conference system with encrypted voice

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101135345B1 (en) * 2010-12-02 2012-04-17 한국과학기술원 Apparatus and method for secret communication using artificial noise incorporated with network coding
KR20150040024A (en) 2013-10-04 2015-04-14 안소현 Management system and method for intelligent terminal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101135345B1 (en) * 2010-12-02 2012-04-17 한국과학기술원 Apparatus and method for secret communication using artificial noise incorporated with network coding
KR20150040024A (en) 2013-10-04 2015-04-14 안소현 Management system and method for intelligent terminal

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A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application