JP4093271B2 - Intercept transmission method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method capable of imputting and transmitting bipartite speaking voices on a transceiver to another radio transceiver, thereby of wiretapping the voice by a third person. <P>SOLUTION: The method comprises: an earphone 6 having a microphone function; a full duplex audio communication control unit 7 which is connected to the earphone 6 having the microphone function with two wires and cancels electrical feedback of input from a microphone to prevent howling; and a radio transceiver 8 in which an audio output terminal and a microphone terminal are connected to the full duplex audio communication control unit 7. The disclosed method is characterized in that speaking voices of two persons with a receiver 8 of a mobile phone or a fixed telephone set are inputted to the radio transceiver 8 via the earphone 6 including the microphone function mounted in one earhole of a speaking person 2, and transmitted to a third person 3 so as to wiretap the voices. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention is a communication intercept transmission that enables a two-party call by a mobile phone or a landline phone to be transmitted to a third party wirelessly without being noticed by being able to respond to any on-site situation and without being noticed by the surroundings. Regarding the method.

  Conventionally, in criminal investigations such as hostage standing traps and kidnappings, calls with criminals have been intercepted with the help of pick-up devices for intercepting communications of fixed telephones or mobile telephones, or communications companies. However, it was not easy to prepare for interception under changing circumstances. Also, with the widespread use of mobile phones, the location where eavesdropping changes every moment, the situation that conventional fixed-line eavesdropping devices cannot handle.

  For example, in a two-party call between a criminal and a negotiator, such as a hostage trapping incident, a negotiator's mobile phone is often used, but the place where the criminal is witnessed is talking It was difficult for the negotiator to inform the strategy headquarters of the negotiation process with the criminal at the same time. In addition, the negotiator who was making a call could not receive a command from the operation headquarters or a report on the operation status of the site during the call.

  Patent Document 1 is an invention relating to a full-duplex audio communication circuit using an earphone having a microphone function. The present invention uses an earphone having one microphone function to transmit his / her utterance from the air conduction in the ear canal and simultaneously receive an electric signal from the other party and listen to the sound clearly without howling. It is a possible technology.

  Conventionally, the present invention has been used mainly for the purpose of making a hands-free call using an earphone having one microphone function. This is due to the fact that only the voices transmitted through the ear canal of the wearer are clearly collected.

Japanese Patent Laid-Open No. 2001-157292 (pages 2, 3 and 1)

  In order to solve the above-mentioned problems, the present invention simultaneously inputs and transmits two-party call voice to another wireless transceiver via an earphone having a microphone function mounted in a caller's ear hole, It is an object to provide a method for enabling three parties to intercept.

  Also, to provide a method for receiving the communication from a third party at the same time while allowing the contents of the two-party call to be transmitted to a third party so that the third party can be intercepted, without being noticed by the other party. Is an issue.

In order to solve the above problems, a communication intercept transmission method of the present invention includes a vibration member and a magnetic circuit or a piezoelectric element member connected to the vibration member, and air conduction in the ear canal of the voice uttered by the wearer and in the vicinity of the ear hole of the wearer. A microphone function that receives sound waves from the assigned receiver through air conduction through the vibration member or piezoelectric element member and converts an acoustic input into an electric signal output, and the vibration member by an audio signal current sent from the outside Alternatively, an earphone having a microphone function having both a conversion function with an earphone function that converts an electric signal input that generates a sound wave by oscillating a piezoelectric element member into an acoustic output, and the earphone having the microphone function are connected in two lines. A full-duplex audio communication control unit that cancels electrical feedback of input from the microphone to prevent howling, and the full-duplex audio communication control unit. A wireless transceiver audio output terminal and the microphone terminal connected to turn the communication control unit,
Inputs voice of two parties to the handset of a mobile phone or a fixed telephone to the wireless transceiver via the earphone having the microphone function mounted in one ear hole to which the handset of the caller is assigned. Then, it is transmitted to a third party and intercepted.

In addition, the earphone having the microphone function is attached to the right and left ear holes, and the earphone having the microphone function is attached to the ear hole to which the wearer normally attaches the telephone receiver, and the first wireless transceiver for intercept transmission is connected. Connect the second wireless transceiver for receiving a call or command or report with a third party to the other earphone having the microphone function,
Performing a two-party call with the handset of a mobile phone or a fixed telephone through one ear hole, and at the same time, input to the wireless transceiver via the earphone having the microphone function, and transmit to a third party for interception. A command or report voice from a third party is intercepted through the other ear hole without being noticed by the two-party call partner.

  In addition, the full-duplex audio communication control unit outputs only one earphone having a microphone function due to air conduction in the ear canal and a reception signal from the input terminal of the wireless transceiver to the input / output terminal of the earphone. An amplifier circuit connected in the meantime and an impedance circuit in series with the amplifier circuit, and a transmission signal from the input / output terminal of the earphone are output to the output terminal of the wireless transceiver. A D converter, a first compressor, an expander and a D / A converter, and a reception signal from the input terminal are prevented from being output to the output terminal via the expander and the D / A converter. A second A / D converter connected in series between the connection point of the first compressor and the expander and the input terminal, a second compressor, and a feedback input terminal.・ Adapter with phase control A signal synthesizing circuit provided between the first compressor and the branch circuit, and synthesizing the received digital signal from the input terminal. The output is returned to the feedback input terminal of the adaptive digital filter, and digital signal processing is performed so that the combined output is minimized.

  According to the communication intercept transmission system of the present invention, the contents of a two-party call can be intercepted by a third party clearly and without howling even under noise. In particular, since the recording is performed with the microphone earphone in the caller's ear canal, it is possible to clearly record only the voice received from the receiver placed near the caller's ear canal and the voice of the caller traveling in the ear canal.

  In addition, since the two-party call can be intercepted by an earphone having a microphone function in one ear hole, a caller who is in a two-party call can use a microphone function connected to a wireless transceiver from a third party. By mounting the earphone having the second earphone in the other ear hole, it becomes possible to simultaneously intercept communication from a third party without being noticed by the other party of the two-party call.

  In the communication intercept transmission system of the present invention, a receiver such as a mobile phone for two-party calls is applied to the head-ear side, and the earphone having a microphone function mounted in the ear hole of the caller is hidden, Interceptions can be easily concealed, and information can be shared with the incident response headquarters, field leaders, and operation personnel without stimulating criminals or negotiating partners at the scene of the incident.

  The communication intercept transmission method of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing a communication intercept transmission method of the present invention.

  In FIG. 1, 1 is a call partner of a two-party call, and 2 is a caller. Reference numeral 3 denotes a third party (interceptor) who intercepts a two-party call between the call partner 1 and the caller 2.

  The communication between the calling party 1 and the calling party 2 in the two-party call is shown in FIG. 1 with the handset 4 and 5 of the cellular phone, but one of them may be a fixed telephone or both fixed telephones. Any device may be used as long as it operates the handset 5 in a manner corresponding to that.

  In the communication interception method of the present invention, the caller 2 has a microphone function connected to the earphone output terminal of the wireless transceiver 8 and the input / output terminal of the full-duplex audio communication control unit 7 connected to the microphone input terminal. The earphone 6 is mounted in the caller's ear hole 2a to which the handset 5 is assigned.

  The caller 2 turns on the power of the wireless transmitter / receiver 8 in advance, causes the earphone 6 having a microphone function to pick up the voice of the caller 2 by air conduction in the ear hole, and receives the third signal received by the wireless transmitter / receiver 8. The communication listening from the person (interceptor) 3 is made. At this time, the wireless transmitter / receiver 8 connected between the wireless transmitter / receiver 8 and the earphone 6 having a microphone function cancels the housing due to the superimposition of the audio output and the audio input, thereby enabling clear communication.

  Further, the caller 2 connects the full-duplex audio communication control unit 7, the microphone input terminal of the wireless transceiver 8, and the earphone output terminal with four wires, and the full-duplex audio communication control unit 7 and the earphone 6 having a microphone function. The wireless transmitter / receiver 8 and the full-duplex audio communication control unit 7 attached to the inner pocket or the like are concealed from the outside and are connected to a thin two-wire cord. The earphone 6 having a function is mounted in the ear canal.

  The earphone 6 having a microphone function fits in the speaker's ear canal 2a, has a thin connection cord, and uses a color that is not noticed to the outside, such as skin color, so that the earphone for interception is worn from the outside. It can be made inconspicuous.

  Here, when a call between the call partner 1 and the caller 2 is exchanged between the receivers 4 and 5, the voice of the receiver 5 applied to the vicinity of the ear hole of the caller 2 is heard by the caller 2, The sound is picked up by the earphone 6 having a microphone function mounted in the caller's ear hole 2a, the housing is canceled via the full-duplex audio communication control unit 7, and input to the wireless transceiver 8 and transmitted.

  At the same time, the response voice of the caller 2 is sent from the receiver 5 to the receiver 4 of the communication partner 1 and simultaneously picked up by the earphone 6 having a microphone function mounted in the caller ear hole 2a, and is full-duplex audio. The housing is canceled via the communication control unit 7 and input to the wireless transceiver 8 to be transmitted.

  As described above, the two-party communication between the call partner 1 and the caller 2 is received by the wireless transceiver 8 of the third party (interceptor) 3 and the third party is intercepted simultaneously with the two-party call. In FIG. 1, a third party (interceptor) 3 shows a diagram in which the full duplex audio communication control unit 7 and the earphone 6 having a microphone function connected thereto are not attached. ) When 3 is in an outdoor storm or noisy indoor environment, the wireless transmitter / receiver 8 equipped with the earphone 6 having a microphone function makes clear listening and picks up ambient noise to the caller. The situation of sending can be avoided. That is, it is possible to avoid sending unnecessary voice / noise from the interceptor to the caller 2.

  The earphone having the microphone function includes a vibration member and a magnetic circuit or a piezoelectric element member connected to the vibration member. Air conduction in the ear hole of the voice uttered by the wearer and the receiver 5 applied to the vicinity of the ear hole of the wearer. Microphone function that receives sound waves via air conduction by the vibration member or piezoelectric element member and converts acoustic input into electrical signal output, and displacement vibration of the vibration member or piezoelectric element member by an audio signal current sent from the outside It has both the conversion function with the earphone function that converts the electric signal input that generates the sound wave into the sound output. The earphone 6 having a microphone function according to the present invention is different from a bone conduction microphone that is inserted into the ear canal and collects bone conduction sound, and has a microphone function that collects air conduction of utterance conducted from the oral cavity to the ear hole, and an electric signal. The earphone function for converting the sound into sound waves is realized with one earphone microphone.

  Specifically, a magnetic type earphone having at least a vibration member, a magnetic member bonded to the vibration member, and a coil portion that spreads the magnetic member, or a vibration member, a coil portion connected to the vibration member, and an inner portion of the coil portion Either a dynamic earphone including at least a magnet and a magnetic circuit connecting the magnet and a magnetic yoke disposed outside the coil section, or a crystal earphone including a piezoelectric element member is used. .

  The full-duplex audio communication control unit is connected to the earphone having a microphone function with two wires and cancels the electrical feedback of the input from the microphone to prevent howling. The earphone having the microphone function in the ear canal is used. This is an indispensable device for making the communication that is clear and having the microphone function with one earphone. The circuit will be described later with reference to FIG.

    Next, a second embodiment of the present invention will be described. FIG. 2 is a schematic diagram showing a second embodiment of the present invention. The same components as those in FIG.

  In this embodiment, a caller 2 and a third party (intercept / command / report) 3 wear two wireless transceivers and earphones 6a and 6b having a microphone function connected to the wireless transceivers in the right and left ear holes. Is a feature.

  Earphones 6a and 6b having a microphone function are attached to the left and right ear holes, and the first wireless transmission / reception for intercept transmission to the earphone 6a having the microphone function is attached to the earphone 2a to which the wearer normally attaches the receiver 5 of the telephone. The second earphone 6b having the microphone function is connected to the second radio transmitter / receiver 8b for receiving a call or command or report with a third party, and the microphone function of one of the speaker ear holes 2a is connected. A two-party call is made with the handset 5 of a mobile phone or a fixed telephone through the earphone 6a having the same, and at the same time, a third party (interception / command / report) is provided through the earphone 6b having the equating function of the other speaker ear hole 2a Party) Intercept the command or report voice from 3 without being noticed by the other party.

  In FIG. 2, only one third person (intercept / command / report) 3 is illustrated. However, to make a plurality of third persons having the wireless transceivers 8a and 8b prepare a wireless transceiver of the same frequency. Of course, this can be easily realized.

  FIG. 3 is a schematic diagram for explaining a communication situation at the hostage standing event site using the communication interception method of the present invention.

  In the figure, the other party (criminal) 1 is standing together with the hostage 10 in the building of the crime scene. The caller (negotiator) 2 negotiates with the criminal via the handset 5 of the mobile phone from the vicinity of the building at the crime scene. A plurality of on-site police officers 3a are arranged around the crime scene. In addition, the headquarter police officer 3b is arranged in the case response headquarters provided in the building of the police station.

  In such a situation, in order to apply the communication interception method of the present invention, the negotiator (caller 2) with the criminal possesses the mobile phone (receiver) 5 that receives the call from the criminal and intercepts it. A radio transceiver A (8a) dedicated to transmission and a radio transceiver B (8b) for command reporting are carried, and earphones 6a and 6b having microphone functions connected to the respective radio transceivers A and B are left and right. Leave it in the ear canal.

  In addition, a plurality of on-site police officers 3a and headquarters police officers 3b also have a radio transceiver A (8a) and a radio transceiver B (8b) for command reporting, and each radio transceiver A, B The connected earphones 6a and 6b having a microphone function are mounted in the left and right ear holes.

  Furthermore, the incident response headquarters is provided with a recorder connected to the earphone output terminal of the wireless transceiver A (8a) so as to be able to record the call intercept with the criminal.

  Under this circumstance, the conversation of the caller (negotiator) 2 called by the criminal on the mobile phone is a wireless connection between the on-site police officer 3a, the headquarters police officer 3b and the recorder via the wireless transceiver A (8a). It is transmitted to all of the transceiver A (8a).

  At the same time, the site policeman 3a located near the crime scene sends the location of the criminal at the scene and the situation of the hostage 10 from the radio transceiver B (8b). , It is reported to all of the site police officer 3a and the headquarter police officer 3b. Also, an instruction to perform a mission from the case response headquarters is transmitted from the wireless transceiver B (8b) to all members. Since the sound of the wireless transceiver B (8b) is transmitted to the wearer's ear canal by the earphone 6b having a microphone function, it is not influenced by the surrounding noise and can also be heard by the people around the site. I can't. Of course, the criminals never understand the communication.

  Although FIG. 3 shows an example of a standing case, the communication interception method of the present invention can provide an effective means even in negotiation with a criminal in a kidnapping case.

  FIG. 4 is a circuit diagram showing an embodiment of the circuit of the full-duplex audio communication control unit of the present invention. In FIG. 4, 150 is a full-duplex audio communication control unit (handset circuit unit). 11a is an output terminal, 11b is an input terminal, 12 is an input / output terminal of an earphone having a microphone function, G1 and Z1 are a reception voltage at the input terminal and an equivalent load resistance at the output terminal, and G2 and Z2 are outputs at the input and output terminals, respectively. Indicates voltage and equivalent load resistance.

  Reference numeral 20 denotes a range constituted by digital circuits, 21 and 22 are first and second A / D converters for performing analog-digital conversion, 23 is a D / A converter for performing digital-analog conversion, Reference numeral 25 denotes first and second compressors, 26 denotes a decompressor, 27 denotes an adaptive digital filter, 27a denotes a gain / phase control input terminal of the adaptive digital filter 27, and 28 denotes a digital signal synthesis circuit.

  The operation is as follows. An input signal from the input terminal 11b passes through the operational amplifier amplifier circuit A1 and the resistor circuit R1, and is output from the input / output terminal to the load resistor Z2. On the other hand, an input signal from the input / output terminal 12 enters the first A / D converter 21, becomes a digital signal, and enters the first compressor 24. Next, it enters the expander 26, enters the D / A converter 23, becomes an analog signal, and outputs it to the load resistor Z1 from the output terminal 11a. On the other hand, in order to prevent the input signal from the input terminal 11b from being fed back to the output terminal 11a, the input signal from the input terminal 11b is input to the second A / D converter 22 and converted into a digital signal. 25 and then the adaptive digital filter 27. The output and the input signal via the first compressor 24 are combined with the digital signal combining circuit 28. At this time, the combined signal is input to the feedback input terminal 27a of the adaptive digital filter 27, and the gain and phase of the adaptive digital filter 27 are changed and adjusted so that the combined signal is minimized. That is, it is used as a gain / phase adjustment circuit. The adaptive digital filter can cope with changes in the load resistance Z2 at the input / output terminals.

  The full-duplex audio communication control unit (handset circuit unit) has the following effects. By combining a compressor and an expander with a cancel circuit that adjusts the gain and phase so that the input signal from the input terminal hardly appears at the output terminal, it was said that the conventional example was the limit of stable operation. It is possible to provide a full-duplex audio communication circuit (handset circuit unit) that greatly improves -30 dB and performs stable operation of about -60 dB.

It is a schematic diagram which shows the communication intercept transmission method of this invention. It is a schematic diagram which shows the communication intercept transmission method of the 2nd Embodiment of this invention. It is a schematic diagram explaining the communication situation in the hostage standing trap incident site using the communication interception method of this invention. It is a circuit diagram which shows the Example of the circuit of the full-duplex audio communication control part of this invention.

Explanation of symbols

1 Call partner, (criminal)
2 Caller, (Negotiator)
3 Third Party (Interceptor) (Interception / Direction / Report)
3a On-site police officer 3b Headquarters police officer 4 Handset (mobile phone / landline phone)
5 Handset (cell phone / landline phone)
6 Earphones having a microphone function 6a, 6b Earphones having a microphone function 7 Full-duplex audio communication control unit 8 Wireless transceiver 8a Wireless transceiver A
8b Wireless transceiver B
10 Hostage A1 First amplification circuit, operational amplifier amplification circuit G1 Input voltage at input terminal G2 Input voltage from input / output terminal R1 First impedance circuit, resistance circuit Z1 Load resistance at output terminal Z2 Load resistance at input / output terminal 11a Output Terminal 11b Input terminal 12 Earphone input / output terminal with microphone function 20 Digital circuit 21 First A / D converter 22 Second A / D converter 23 D / A converter 24 First compressor 25 Second Compressor 26 Expander 27 Adaptive digital filter 27a Feedback input terminal 28 Digital signal synthesis circuit 50 Earphone having a microphone function (magnetic earphone)
60 Earphone with microphone function (dynamic earphone)
70 Earphone with microphone function (Crystal type earphone)
150 Full-duplex audio communication control unit (handset circuit unit)

Claims (3)

A vibration member and a magnetic circuit or a piezoelectric element member connected to the vibration member, wherein the sound wave is oscillated through the air conduction in the ear canal of the voice uttered by the wearer and the air conduction from the receiver placed near the ear hole of the wearer. A microphone function that receives sound signals from members or piezoelectric element members and converts acoustic inputs into electric signal outputs, and an electric signal input that generates sound waves by oscillating and vibrating the vibrating member or piezoelectric element members by an audio signal current sent from the outside. An earphone having a microphone function having both a conversion function with an earphone function for converting sound into an audio output, and an earphone having the microphone function connected in two lines to cancel electrical feedback of input from the microphone to prevent howling An audio output terminal and a microphone terminal are connected to the full-duplex audio communication control unit and the full-duplex audio communication control unit. With a line transceiver,
Inputs voice of two parties to the handset of a mobile phone or a fixed telephone to the wireless transceiver via the earphone having the microphone function mounted in one ear hole to which the handset of the caller is assigned. And transmitting it to a third party to intercept it. The earphone having the microphone function is attached to the right and left ear holes, and the first wireless transceiver for intercept transmission is connected to the earphone having the microphone function that is attached to the ear hole to which the wearer normally attaches the telephone receiver. A second wireless transceiver for receiving a call or command or report with a third party is connected to the earphone having the microphone function;
Performing a two-party call with the handset of a mobile phone or a fixed telephone through one ear hole, and at the same time, input to the wireless transceiver via the earphone having the microphone function, and transmit to a third party for interception. The communication intercepting and transmitting method according to claim 1, wherein a command or report voice from a third party is intercepted through the other ear hole without being noticed by a two-party call partner. The full-duplex audio communication control unit outputs only one earphone having a microphone function by air conduction in the ear canal and a reception signal from the input terminal of the wireless transceiver to the input / output terminal of the earphone. A first A / D converter connected in series between the amplifier circuit and the impedance circuit connected thereto and the transmission signal from the input / output terminal of the earphone to the output terminal of the wireless transceiver for outputting the transmission signal to the output terminal of the wireless transceiver And a first compressor, an expander, a D / A converter, and a signal received from the input terminal are prevented from being output to the output terminal via the expander and the D / A converter. A second A / D converter, a second compressor, and a feedback input terminal connected in series between a connection point of the first compressor and the expander and the input terminal; Adaptive to control A signal synthesizing circuit provided between the first compressor and the branch circuit, and synthesizing the received digital signal from the input terminal, 3. The communication intercepting and transmitting method according to claim 1, wherein the adaptive digital filter is returned to a feedback input terminal and digital signal processing is performed so that a combined output is minimized.

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