KR20040093215A - Wireless education system - Google Patents

Abstract

PURPOSE: A wireless educating system is provided to effectively use frequency resources by providing an audio signal in a broadcast method from an educator to a plurality of educatees. CONSTITUTION: A wireless educating system includes one main controlling unit(100) and the N number of auxiliary units(110). The N number of auxiliary units(110) consist of one educator terminal(112) and the remaining number of educatee terminals(122). The educator terminal(112) and the educatee terminal(122) are used by one educator and a plurality of educatees. The wireless educating system is constructed in such a piconet form that the main controlling unit(100) as a master unit controls the a plurality of auxiliary units(110), that is, a set of slave units.

Description

Wireless education system {WIRELESS EDUCATION SYSTEM}

The present invention relates to an education system using wireless, and more particularly, to a wireless education system for providing audio broadcasting for education to a plurality of trainees in a broadcast manner.

Conventional education systems provide independent training to a large number of trainees wearing headphones with educational support programs such as educational English conversation, Japanese conversation, and early childhood cassettes connected by wire. To this end, conventional education systems use a method of distributing audio signals from an audio system to a plurality of headphones via a wire. As such, the conventional education system was configured to distribute the education program signal from the education assistance device in one direction. As an education system that improves the one-way education system, an education system is provided and used to enable dialogue between educators and trainees by installing microphones on the sides of educators and trainees. However, the educational system of the above-described method was not able to improve the educational effect because it was configured to perform only one-way communication from the educator to the educator, and the problem of restricting the educator's behavior because the educator and the educator were connected to each other by wires. there was.

In order to remedy the above-mentioned problem, the applicant of the present invention transmits an audio signal for an educational program to the trainees by wireless communication to the trainees in 1996-17781, filed on May 23, 1996 under the name of "wireless education system". We proposed a wireless education system to guarantee freedom of movement. Such a wireless education system includes an auxiliary memory device for reproducing an audio signal for an educational program, a first radio frequency channel for unidirectional transmission of an audio signal from the auxiliary memory device to at least one or more trainees, and at least one or more educators. A second radio frequency channel for transmitting voice signals bidirectionally to enable voice communication between the trainees, a key selection board for selecting at least one trainee by the educator, and a second radio frequency channel by the key selection board. It is composed of a channel controller for selectively opening for each trainee of at least one person.

In the above-described wireless education system, an educator and a plurality of trainees perform transmission / reception using a time division duplex (TDD) scheme on a slot basis. At this time, since the educator as a master is proceeding in a manner of transmitting and receiving an audio signal to individual trainees as slaves, waste of frequency resources is severe and there is a limitation that the terminal for the educator cannot be further extended.

In addition, the above-described wireless education system has a disadvantage in that two-way communication between an educator and an educator is possible, but only a 1: 1 conversation function between an educator and an educator is possible.

Therefore, it is an object of the present invention to provide a wireless education system capable of efficiently using frequency resources by providing an audio signal transmitted from an educator to a plurality of educators in a broadcast manner.

It is another object of the present invention to provide a wireless education system that is easy to expand.

Another object of the present invention is to provide a wireless education system in which one educator and a plurality of educators can have a one-to-many conversation.

1 is a block diagram of a wireless education system according to the present invention,

2A shows a diagram of a first radio frequency band, FIG. 2B shows a diagram of second and third radio frequency bands, FIG. 2C shows a diagram of a fourth radio frequency band,

3 is a detailed block diagram of the main adjustment device shown in FIG. 1;

4 is a detailed block diagram of an auxiliary device shown in FIG. 1;

5 is a view showing another embodiment of the main adjustment device of FIG. 3;

6 shows another embodiment of the auxiliary device of FIG.

<Description of Symbols for Main Parts of Drawings>

100: main adjusting device 110: auxiliary device

112: terminal for educators 122: terminal for educators

316: audio switching circuit

372, 374, 376, 378, 410: wireless transceiver

502: analog transmitter 602: analog receiver

According to a preferred embodiment of the present invention for achieving the above object, a wireless education system, main adjustment device for supplying an audio signal using a frequency for wireless communication; And an auxiliary device having at least one educator terminal for receiving the audio signal from the main control device and the remaining educator terminal, wherein the frequency for wireless communication is divided into a plurality of radio frequency bands, and the audio The signal is transmitted in a broadcast manner through one of the divided radio frequency bands.

In the above-described present invention, the plurality of radio frequency bands include first to fourth radio frequency bands, and the first frequency band is a broadcast channel for broadcasting the audio signal from the main adjustment device to the auxiliary device. Wherein the second and third frequency bands are used as training channels for communication of voice and data between the educator terminal and the educated terminal by relaying the main adjustment device, and the fourth frequency band is the main adjustment. It is used as an educator channel for voice and data communication between the device and the educator terminal.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 1 to 6.

1 is a block diagram of a wireless education system according to the present invention. The wireless education system of the present invention includes one main adjusting device 100 and N auxiliary devices 110, and the N auxiliary devices 110 are one educator terminal 112 and the rest (N-1). Dog terminal 122 is provided. The main adjustment device 100 is used as a device for educators to operate in a certain place in a language room, etc., the educator terminal 112 and the trainee terminal 122 of the auxiliary device 110, each of one educator and a plurality of educators. Used by them. The wireless education system of the present invention is configured as a master device in the form of a piconet in which one main coordination device 100 controls a plurality of auxiliary devices 110 that are a collection of slave devices. On the contrary, in the wireless education system of the present invention, a scatternet in which any one of the auxiliary devices 110 configured in the above-described piconet form a master device and the remaining auxiliary devices 110 are configured as a set of slave devices. It may also be configured in the form of.

As described in detail with reference to FIGS. 2A, 2B, and 2C, the wireless education apparatus according to the present invention may be configured with a main adjustment device 100 and an auxiliary device in which an industrial scientific medical (ISM) frequency band of 2.4 GHz to 2.48 GHz is used. It is used as a frequency for wireless communication between the (110). The ISM band is a frequency band that can be used worldwide for industrial, scientific and medical purposes. The frequency for wireless communication is further divided into first to fourth radio frequency bands and used to transmit and receive different radio signals. At this time, the wireless training apparatus of the present invention frequency hopping to perform the transmission and reception while changing the channel according to the algorithm for calculating the hopping order in the main control device 100 and the plurality of auxiliary devices 110 in any one of the radio frequency band Communicate with each other in a fashion. Frequency hopping is a method of transmitting and receiving about 1,600 times per second. In the present invention, one frequency band is composed of 20 hop channels, and one channel has an interval of 1 MHz.

The first frequency band is used as a broadcasting channel for broadcasting an audio signal, for example, an education program for foreign language conversation, from the main adjusting device 100 to the auxiliary device 110, and the second and third frequency bands of the main adjusting device 100 are used. It is used as a training channel for voice exchange, i.e. 1: 1 conversation, 1: 2 conversation or 1: 3 conversation, between the educator terminal 112 and the educator terminal 122 by relaying, and the fourth frequency band is used as the main control device ( 100) is used as an educator channel for wireless communication between the educator terminal 112, through which the voice of the educator generated in the educator terminal 112 is received and the educator's voice generated from the educator terminal 122 is received. It is provided to the educator terminal 112.

The main adjusting device 100 includes a front panel 102 in which light emitting units corresponding to the number of the auxiliary devices 110 are arranged so that the operation state of each auxiliary device 110 can be confirmed as a light emitting state, and each auxiliary device ( It has an operation keyboard 104 for selecting 110 and an LED 106 for indicating battery charge status. The main adjusting device 100 has a broadcasting function for broadcasting audio signals to a plurality of auxiliary devices 110, 1: 1 to 1: 2 conversation function, 1: 1 to 1: 3 model voice function, monitor function, and lecture function. And group separation functions.

The broadcast function is a main function of the present invention and transmits an audio signal from a main control device 100 to an auxiliary device 110 in a corresponding radio frequency band through a broadcast channel (ie, a first radio frequency band) and broadcasts the broadcast signal. I mean. In the present invention, the broadcasting function can be applied to the main broadcasting function and the auxiliary broadcasting function as the (N-1) trainee terminals 122 are grouped into one group or a plurality of groups. As described above, the main broadcasting function transmits an audio signal in a broadcasting manner from the main adjusting apparatus 100 to each auxiliary device 110 belonging to a group through a broadcasting channel (ie, a first radio frequency band). This main broadcast function has the effect of collectively delivering the audio signal to the entire trainee terminal 122. On the other hand, the auxiliary broadcast function is that when (N-1) trainee terminals 122 are grouped into a plurality of groups (that is, in the case of group separation as described below), one group is connected through a broadcast channel. While performing the main broadcast function, the other group may be connected to another audio signal, e.g., the aforementioned broadcast audio signal, educator, through another channel, e. This means that a sound signal or a music signal reproduced by an audio reproducing apparatus such as a digital versatile device (DVD) is transmitted in a broadcast manner.

The conversation function is for inquiring and answering 1: 1 or 1: 2 between an educator and one or more educators. The educator channel (ie, the fourth radio frequency band) and the educator terminal used by the educator terminal 112 are used. 1: 1 or between the educator terminal 112 and one or more learner terminals 122 through an education channel (ie, a second radio frequency band and / or a third radio frequency band) used by the 122. 1: 2 means that inquiry and response voice data are transmitted and received.

The model voice function means to broadcast the inquiry and response voice data generated during the above-described conversation function to the entire participant terminal 122 through the broadcasting channel (ie, the first radio frequency band), and the monitor function is for the educator. The terminal 112 refers to a function of sequentially or selectively listening to voice data generated from the student terminal 122 through the education channel.

The lecture function means that the educator terminal 112 transmits lecture voice data to the plurality of educator terminals 122 through a broadcast channel.

The group separation function divides the entire trainee terminal 122 into at least two groups, and the main control device 100 or the trainee terminal 110 is divided into the respective trainee terminals 112 into the respective groups. This means that different audio signals or voice data are transmitted through broadcast channels or educational channels. As an extension of this group separation, educators can conduct main and secondary lectures as they move between separate groups, and have 1: 1 conversations with specific trainees within each group.

On the other hand, the auxiliary device 110 is provided with a headset 118, respectively, using the headset 118 to listen to the audio signal broadcast from the main adjusting device 100, or by the relay of the main adjusting device 100 by the educator And voices of the trainees. The educator's terminal 112 and the student's terminal 122 of the auxiliary device 110 have identification IDs respectively identified by the master control device 100, and the master control device 100 includes a broadcast channel and By transmitting the identification ID together with the broadcast signal transmitted through the educator channel, not only the broadcast signal but also the control signal may be provided to the educator terminal 112 and the educator terminal 122 having the corresponding identification ID. Here, the control signal includes, for example, a movement control signal between channels, a channel change for the educator and the trainee to talk, a signal for the educator to transfer the microphone authority to the trainee, and the like.

The educator terminal 112 in the auxiliary device 110 has an LED 116 and a call switch 124 indicating a battery charge state. The educator terminal 112 performs a function of listening to an audio signal broadcast from the main adjusting device 100 and a conversation function with the educator terminal 122 in response to a call signal generated from the educator terminal 122. Can be.

The trainee terminal 122, like the trainee terminal 112, listens to the audio signal broadcast from the master adjusting device 100, and listens to the voice data provided from the trainee terminal 112, and a call switch. 124 has a function of calling the educator terminal 112.

2A-2C, diagrams of the aforementioned first to fourth radio frequency bands are shown.

FIG. 2A is a diagram of slots and hopping channels of a first radio frequency band, wherein slots 0, 4, 8, ... are used for controlling a trainee terminal of the auxiliary apparatus 110 to transmit a broadcast audio signal in the main control apparatus 100. 122 is used as an SCO (sync) slot to transmit to. At this time, each trainee terminal 122 of the auxiliary device 110 that receives the broadcast audio signal from the main control device 100 is programmed not to return a carrier signal indicating that the data received by the main control device 100. have. By such a convention, the wireless education system of the present invention can transmit an educational audio program in a broadcast manner even if it is configured as a piconet or scatternet connection. Alternatively, the wireless education system of the present invention configured in the form of a piconet or a scatternet may be configured to transmit an audio signal from the master coordination apparatus 100 to the auxiliary apparatus 110 in a time division manner rather than a broadcast scheme. For example, a system using a time division method may include a Bluetooth system, which, unlike the broadcasting method of the present invention, receives a signal transmitted from the main control device 100 and / or the auxiliary device 110 of each other. Is then driven in a way that returns a response.

Slots 2, 6, ... are used as ACL (asynchronous) slots for transmitting data from the main coordinating apparatus 100 to each trainee terminal 122 of the auxiliary apparatus 110, respectively. Is used as an ACL (asynchronous) slot for transmitting data to be returned to the master coordinating apparatus 100 by each student terminal 122 of the auxiliary apparatus 110.

FIG. 2B is a diagram of slots and hopping channels of the second and third radio frequency bands, with slots 0, 4, 8,... It is used as a voice transmission channel for transmitting audio data for voice. Slots 1, 5, 9, ... are used as a voice receiving channel through which the main adjusting device 100 receives audio data for voice from the student terminal 122 of the auxiliary device 110. Slots 2, 6, ... is used as a data transmission channel through which the main control device 100 transmits digital data to the student terminal 122 of the auxiliary device 110, slots 3, 7, ... ) Is used as a data receiving channel for receiving digital data from the student terminal 122 of the auxiliary device 110.

FIG. 2C is a diagram of slots and hopping channels of the fourth radio frequency band (educator channel), wherein slots 0, 4, 8, ... are indicated by the main coordinating apparatus 100 to the educator terminal 112. 122 is used as a voice transmission channel for transmitting the voice and broadcast audio data signals received in step 122, and slots 1, 5, 9, ... are used for receiving a voice signal from the educator terminal 112. Used as a voice receiving channel. Slots 2, 6, ... are used as a data transmission channel through which the master coordinating apparatus 100 transmits digital data to the educator terminal 112, and slots 3, 7, ... are main coordinating apparatus 100. Is used as a data receiving channel for receiving digital data from the educator terminal 112 of the auxiliary device 110. Here, the data includes a channel switching signal, a microphone on / off control signal, a terminal on / off, a microphone on / off, a battery status, and the like.

FIG. 3 shows a detailed block diagram of the main adjustment device 100 shown in FIG. 1.

The main control device 100 shown in FIG. 3 includes first and second audio sources 302 and 304, auxiliary audio sources 306, first and second equalizers 308 and 310, and first and second volumes. Controller 312, 314, audio switching circuit 316, sound source 108, first to fourth coder-decoders 318, 320, 322, 324, first to fourth baseband converters 326 , 328, 330, 332, first to fourth wireless modems 334, 336, 338, 340, first to fourth antennas 342, 344, 346, 348, clock 350, ROM 352 , RAM 354, keyboard 104, LEDs 106, Universal Asynchronous Receiver / Transmitter (UART) 360, Service Provider Interface (SPI) 362 and Central Processing Unit (CPU) 370 do.

The first and second audio sources 302 and 304 supply audio signals for educational programs, i.e., foreign language conversation signals, and the auxiliary audio source 306 is provided via a device such as DVD on behalf of the second audio source 304. Supply the music signal to be played. The first and second equalizers 308 and 310 may amplify or transmit a training program audio signal supplied from the first and second audio sources 302 and 304 or a music signal supplied from the auxiliary audio source 306, respectively. Performs the function of compensating and uniformizing the deformation caused by The level meters 382 and 384 perform the function of indicating the level of the signal output from the first and second equalizers 308 and 310. The first and second volume controllers 312 and 313 adjust the volume at the first and second equalizers 308 and 310 to provide volume control to the audio switching circuit 316.

The audio switching circuit 316 selects an output of the first audio source 302, the second audio source 304, or the auxiliary audio source 306 under the control of the CPU 370, so that the first or fourth transmitter 372 or 378) and the antenna 342 or 348 corresponding thereto to broadcast to the auxiliary device 110 side.

The first to fourth wireless transceivers 372, 374, 376, and 378 may respectively codec 318, 320, 322, 324, codec 318, 320, which compresses an output signal selected by the audio switching circuit 316 into a digital signal. The signals converted by the baseband converters 326, 328, 330, and 332, and the baseband converters 326, 328, 330, and 332, which convert the signals compressed by the 322 and 324 into baseband signals, are converted into wireless data. Wireless modems 334, 336, 338, and 340 that convert and wirelessly transmit through corresponding antennas 342, 344, 346, and 348. The first and fourth wireless transmitters 372, 374, 376, and 378 may also perform a function of converting a signal wirelessly transmitted from the auxiliary device 110 as described above.

UART 360 and SPI 362 are used to extend a wireless education system by providing an interface with a serial device, such as a computer system or other master control device connected to master control device 100.

The clock 350 generates a clock signal for driving the CPU 370. The ROM 352 stores an overall operation program of the wireless training system according to the present invention, and the RAM 354 is generated in the wireless training system. Used to temporarily save the data.

The keyboard 104 is used by the operator or educator of the master adjusting device 100 to designate a particular auxiliary device 110, and the LED display 106 is arranged on the front panel to indicate the operating status of the main adjusting device 110. Used to check.

The CPU 370 controls the main adjusting device 100 as a whole. In particular, the CPU 370 controls the audio switching circuit 316 according to a key input signal provided through the keyboard 104 so that the selected audio signal or data signal is transmitted to the wireless transceiver. Through 372, 374, 376, and 378 to each auxiliary device 110.

Referring to FIG. 4, detailed block diagrams of the educator terminal 112 and the educator terminal 122 of the auxiliary device 110 are illustrated.

Each auxiliary device 110 includes an antenna 402 for transmitting and receiving, a wireless transceiver 410, an output amplifier 412, an input amplifier 414, a speaker 416, a microphone 418, a clock 420, and a flash. Memory 422, ROM 424, RAM 426, call switch 124, LED 116, and central processing unit 450 for the terminal.

The transmitting / receiving antenna 402 selectively receives a radio signal transmitted in each of the first to fourth radio frequency bands from the main adjusting device 100 and transmits the received radio signal to the radio transceiver 410. The radio transceiver 410 may include a radio modem 404 for demodulating a signal received through the antenna 402 for transmission and reception, a baseband converter 406 for converting a demodulated broadcast signal to a baseband signal, and an analog signal for a baseband signal. And a codec 408 for converting to a signal. The analog signal converted by the wireless transceiver 410 is amplified by the output amplifier 412 and output to the trainee through the speaker 416 connected to the output amplifier 412. On the contrary, the voice signal generated by the educator or the trainee through the microphone 418 is amplified by the input amplifier 414 connected to the microphone 418 and transmitted to the wireless transceiver 410. The signal is converted into a digital signal by the codec 408, modulated by the wireless modem 404 via the baseband converter 406, and then wirelessly transmitted to the main controller 100 through the transmit / receive antenna 402.

The clock 420 generates a clock signal necessary for driving the CPU 450, and the flash memory 422 stores identification IDs of each of the educator terminal 112 and the educator terminal 122. 424) stores the overall operation program of each of the terminal 112 and the student terminal 122, the RAM 426 is generated in each of the terminal 112 and the terminal 122 for students. Used to temporarily store data.

The call switch 124 is mounted on the trainee terminal 122, and the trainee terminal 122 is used to call and talk with the main control device 100 or the trainee terminal 112, and the LED display 116 Is used to indicate, for example, the level of battery charge of each of the educator terminal 112 and the educator terminal 122.

The CPU 450 generally controls each of the educator terminal 112 and the trainee terminal 122, and in particular, according to the call signal provided through the call switch 124, the educator terminal 112 and the trainee terminal. Let 122 communicate with each other.

An embodiment in which the wireless education system of the present invention having the above-described configuration is applied to, for example, a wireless language room, will be described with reference to FIGS. 1 to 3.

Broadcast function

The audio signal supplied from the first or second audio source 202 or 204, that is, the language program, is processed as a radio broadcast signal by the audio switching circuit 214 and the first radio transceiver 272 in the cast-type device 100. Then, it is broadcasted wirelessly to the educator terminal 112 and the educator terminal 122 through a broadcast channel that is a first radio frequency band. In this case, as illustrated in FIG. 2A, the broadcast signal transmitted from the main coordination apparatus 100 is loaded on each hop channel (slots 0, 4, 8, ...) by a hopping method, and the terminal 112 for the educator and It is transmitted to the student terminal 122. The broadcast signal of the language program transmitted from the main control device 100 is received through the antenna 402 in the educator terminal 112 and the educator terminal 122 and processed as an analog signal in the wireless transceiver 410. It is output through the speaker 416. Accordingly, educators and trainees using the educator terminal 112 and the educator terminal 122 can listen to the language program through the speaker 416. The above-described broadcasting method is an auxiliary broadcasting method of broadcasting a different audio signal to each of the terminal groups of the trainees separated from the main broadcasting function allowing the trainees to listen to the entire terminal 122 for the trainees. The same may apply.

Conversation function

When the call switch 124 is pressed on any one of the trainee terminals 122, the call signal is detected by the CPU 450 and is transmitted to the second or third radio as illustrated in FIG. 2B via the wireless transceiver 410. It is transmitted to the main control device 100 through the training channel, which is a frequency band. At this time, the front panel of the main adjusting device 100 is displayed with a signal indicating the student terminal 122 that transmitted the call signal, the main adjusting device 100 receives the call signal received from the student terminal 122 As illustrated in FIG. 2C, the instruction is transferred to the educator terminal 112 through the educator channel. In this regard, the educator may not receive the call signal generated by the educator because the educator is not at the place where the main adjusting device 100 is arranged and always moves the education center. Therefore, according to the present invention, when the main adjusting device 100 receives the call signal from the trainee terminal 122, the trainee transmits the call signal to the trainee terminal 112 and at the same time using the sound source 108 A call sound indicating that a call signal has been received from the user terminal 122 is transmitted to the educator terminal 112 through the educator channel through a call sound. Therefore, even if the educator does not visually recognize the call signal generated from the trainee, the educator can visually recognize the call signal from the trainee through the call sound and respond appropriately.

Thereafter, the educator terminal 112 selects the corresponding educator terminal 122 and transmits a voice signal provided to the selected educator terminal 122 to the main coordinating apparatus 100 through the educator channel. 100 transmits the voice signal generated from the educator terminal 112 to the corresponding trainee terminal 122 through the education channel. By repeating the above-described process, a dialogue between the educator terminal 112 and the educator terminal 122 that generated the call signal is performed by the relay of the main adjusting device 100. The foregoing description describes a 1: 1 conversation between the educator terminal 112 and one of the trainee terminals 122, and the 1: 2 conversation between the educator terminal 112 and the two trainee terminals 122. Data transmission and reception is also possible.

Model Voice Function

The master coordinating apparatus 100 transmits the educator's voice or data to the educator's terminal 122 selected by the educator via the educator channel when one or more educator's terminals 122 are selected by the educator on its front panel. On the other hand, while transmitting the voice or data from the selected trainee terminal 122 through the education channel to the educator, the remaining trainee terminal 122 not selected by the educator is 1: 1, 1: between the educator and the trainee. Sends 2 or 1: 3 conversations through the broadcast channel.

Monitor function

The educator terminal 112 receives voice signals or data generated from the educator terminal 122 sequentially or selectively by the educator terminal 112 by the relay of the main adjusting device 100. This function can also be used to check the educated attitude of the trainee by allowing the educator to listen to the trainee's voice.

Lecture function

The main adjustment apparatus 100 transmits the lecture audio and audio data to the whole of the student terminal 122 through a broadcast channel by an operator's operation. In addition, the function of the main steel and the secondary lecture may be performed according to the group separation function.

Group separation function

The main adjusting device 100 divides the entire trainee terminal 122 into at least two groups on the front panel, and the trainee terminal 122 divided into each group through different channels, for example, a broadcast channel or an education channel. Different broadcast signals are transmitted. In the group-separated state, the main coordinating apparatus 100 may transmit broadcast signals for different main lectures and sub-lectures through different channels, for example, broadcast channels or training channels, for each separated group. A 1: 1 conversation with a specific trainee terminal 122 is performed within a separate group of the group.

5 and 6 show different embodiments of the main adjusting device and the auxiliary device of the present invention.

Another embodiment of the main adjustment device shown in FIG. 5 is an analog radio transmission unit that processes analog signals in addition to the wireless transmission units 372, 374, 376, and 378 that process digital signals in the main adjustment device 100 illustrated in FIG. 3. Except that 502 is further included, the remaining components are the same as in FIG. 3. In addition, another embodiment of the auxiliary device shown in FIG. 6 further includes an analog wireless receiver 602 that processes analog signals in addition to the wireless receiver 410 that processes digital signals in the auxiliary device 110 shown in FIG. 4. Except that, the rest of the components are the same, so detailed description thereof will be omitted. The configuration shown in FIG. 5 may be usefully used in a system for transmitting an audio signal in a broadcast manner as in the present invention. As is well known, when an error occurs in a communication process using digital data, digital data may not be recovered due to the characteristics of the digital signal and broadcast may be interrupted midway. However, in the case of broadcasting in the form of an analog signal, even if a transmission error occurs, at least broadcast is not disconnected due to the characteristics of the analog signal.

Alternatively, in FIG. 5, one of the radio transmitters 372, 374, 376, and 378, for example, the radio transmitter 372 is replaced by the analog radio transmitter 502, and the analog radio receiver 602 is added in FIG. 6. Or may have a configuration in which the wireless receiver 410 is replaced with the analog wireless receiver 602.

According to this configuration, the main adjusting device 100 does not convert the broadcast audio signal into a digital signal, but directly broadcasts the broadcast signal as an audio signal, and the auxiliary device 110 converts the analog broadcast signal into the speaker 416 without conversion. Will be output via In addition, voice signals and data communication communicated between the main adjusting device 100 and the auxiliary device 110 are digital.

Therefore, it is possible to infinitely increase the number of auxiliary devices by the real-time digital broadcasting method or the piconet or scatternet method by the wireless education system of the present invention having the above-described configuration, and it is not only easy to expand, but also one-to-one between educators and educators. The advantage is that all conversations are possible.

In addition, the wireless education system of the present invention has the advantage that the two-way communication between the educator and the trainees as well as the communication between the trainees, and 1: 1 to 1: 3 conversation between the educator and the trainees is possible.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit and scope of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (17)

In the wireless education system, A main adjusting device for supplying an audio signal using a frequency for wireless communication; And And an auxiliary device having at least one educator terminal for receiving the audio signal from the main control device and the remaining educator terminal. The frequency for wireless communication is divided into a plurality of radio frequency bands, and the audio signal is a wireless training system characterized in that it is transmitted in a broadcast manner through one of the divided radio frequency bands. The method of claim 1, The plurality of radio frequency bands include first to fourth radio frequency bands, wherein the first frequency band is used as a broadcast channel for broadcasting the audio signal from the main adjusting device to the auxiliary device, and the second and the second The third frequency band is used as a training channel for communication of voice and data between the educator terminal and the educated terminal by the relay of the main adjusting device, and the fourth frequency band is used between the main adjusting device and the educator terminal. Wireless education system, characterized by being used as an educator channel for voice and data communication. The method of claim 2, Each of the plurality of auxiliary devices has an identification ID, and the identification ID designates an auxiliary device to which the broadcast signal transmitted through the first radio frequency band is transmitted from the main adjusting device. Education system. The method of claim 3, wherein The main adjustment device, A panel in which light emitting parts corresponding to the number of the auxiliary devices are arranged so as to confirm an operating state of the plurality of auxiliary devices as a light emitting state; An operation keyboard for selecting each of the auxiliary devices; At least one audio source for supplying the audio signal; An auxiliary audio source for supplying the auxiliary audio signal; An audio switching circuit for selectively switching and outputting an audio signal or an auxiliary audio signal supplied from the audio source or the auxiliary audio source; A wireless transceiver for converting an audio signal or an auxiliary audio signal output by the audio switching circuit to a wireless digital signal to transmit to the selected auxiliary device via an antenna or to convert the voice and data signals transmitted from the auxiliary device into an analog signal ; And a main controller for controlling the switching operation of the audio switching circuit. The method of claim 3, wherein The auxiliary device, A microphone for inputting a voice signal generated from the trainee or the educator; A wireless transmission / reception unit for receiving an audio signal or an auxiliary audio signal transmitted from the main control device through an antenna and converting it into an analog signal or converting a voice signal input from the microphone into a wireless digital signal and transmitting the converted audio signal to the main control device; Wireless education system comprising a speaker for outputting an analog signal provided from the wireless transceiver. The method of claim 4, wherein The main adjusting device further includes a panel on which light emitting units are arranged corresponding to the number of the terminal for students to be trained so as to confirm the operation state of the terminal for students, and an operation keyboard for selecting each terminal for students. Wireless education system, characterized in that. The method of claim 4, wherein And the learner terminal further comprises a call switch for calling the educator terminal to perform voice communication with the educator terminal through the second and third radio frequency bands. The method according to claim 6 or 7, The main adjustment device, Providing a signal called from the terminal for the educator to the educator terminal through the fourth radio frequency band, and receiving a voice signal received from the educator terminal through the fourth radio frequency band; And / or provide to the student terminal through a third radio frequency band, and provide a voice signal generated from the student terminal through the fourth radio frequency band to the student terminal through the fourth radio frequency band. And a communication function for allowing the voice and data signals to be transmitted and received between more than one trainee terminal. The method of claim 8, The main adjustment device, And a model voice function for causing the voice and data signals transmitted and received between the educator terminal and the one or more educator terminals to be broadcast to the educator terminal through the broadcast channel. The method according to claim 6 or 7, The main adjustment device, And a monitor function for receiving voice and data signals generated from the trainee terminal through the fourth radio frequency band. The method according to claim 6 or 7, The main adjustment device, And a lecture function for allowing a lecturer's lecture voice and data signals to be broadcast from the terminal for educators to the terminal for learners through the first radio frequency band. The method according to claim 6 or 7, The main adjustment device, The entire terminal for the trainee terminal is selected by the keyboard and divided into at least two groups, and each of the trainee terminals separated into each group is provided through the first radio frequency band or the second and / or third radio frequency band, respectively. And a group separation function for transmitting another broadcast signal. The method of claim 1, The wireless education system is a wireless education system, characterized in that the main control device is configured as a master device in the form of a piconet (piconet) to control the plurality of auxiliary devices as a set of slave devices. The method of claim 1, In the wireless education system, the main coordinating device controls the plurality of auxiliary devices as a master device as a set of slave devices, and any one of the plurality of auxiliary devices is a master device and the other auxiliary device as a master device set. Wireless education system, characterized in that configured in the form of a scatternet (scatternet) to control. The method of claim 4, wherein The main adjusting device further includes an analog radio transmitter for broadcasting an audio signal or an auxiliary audio signal to a plurality of the auxiliary devices in the form of an original analog signal, The plurality of auxiliary devices further comprises an analog wireless receiver for processing the audio signal and the auxiliary audio signal broadcast from the main control device. In the wireless education system, A main adjusting device for supplying an audio signal using a frequency for wireless communication; And And an auxiliary device having at least one educator terminal for receiving the audio signal from the main control device and the remaining educator terminal. The frequency for wireless communication is divided into a plurality of radio frequency bands, and the audio signal is transmitted in one of the divided radio frequency bands in a time division scheme. The method of claim 16, The time division scheme is a wireless training system, characterized in that it comprises a Bluetooth scheme.