KR20170054701A - A wireless microphone apparatus capable of connecting additional wire microphones and method thereof - Google Patents

A wireless microphone apparatus capable of connecting additional wire microphones and method thereof Download PDF

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Publication number
KR20170054701A
KR20170054701A KR1020150157177A KR20150157177A KR20170054701A KR 20170054701 A KR20170054701 A KR 20170054701A KR 1020150157177 A KR1020150157177 A KR 1020150157177A KR 20150157177 A KR20150157177 A KR 20150157177A KR 20170054701 A KR20170054701 A KR 20170054701A
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South Korea
Prior art keywords
microphone
microphone device
wired
signal
wireless
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KR1020150157177A
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Korean (ko)
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KR101811791B1 (en
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이기원
사공석진
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주식회사 인터엠
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/03—Constructional details, e.g. casings, housings
    • H04B1/034—Portable transmitters
    • 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
    • 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)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Transmitters (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephonic Communication Services (AREA)

Abstract

According to the present invention, in a wireless microphone device, at least one wired microphone can be connected to one wireless microphone. A voice signal inputted from the wired microphone through one wireless channel assigned to the wireless microphone can be transmitted together. Therefore, it is possible to transmit the voice signals of a plurality of users by using one wireless microphone to increase the efficiency of the wireless microphone. In addition, the cost for implementing a wireless microphone system can be greatly reduced.

Description

TECHNICAL FIELD [0001] The present invention relates to a wireless microphone device and a method for extending a microphone,

The present invention relates to a wireless microphone device, and more particularly, to a wireless microphone device in which at least one wired microphone can be connected to one wireless microphone and a voice signal input from a wired microphone through one wireless channel allocated to the wireless microphone To a wireless microphone device and a method capable of extending a microphone capable of transmitting voice signals of a plurality of users by using a single wireless microphone.

Generally, when a plurality of people gather in a specific space such as a conference room and conduct a conference, a conference microphone system is used to more clearly convey the contents of a speech among a plurality of participants located in a wide space.

At this time, such a conference microphone system is connected to a central microphone control system through a wired line, so that a voice signal of a speaker is input and transmitted to a microphone control system. The voice signal thus transmitted is amplified through a speaker The utterance contents of the speaker can be more clearly transmitted even in a large space.

Meanwhile, as wireless communication technology has been developed in recent years, a wireless microphone system for transmitting a voice signal by radio is being developed instead of connecting each microphone with a conventional wired line.

Since the wireless microphone system is not connected to a central microphone control system such as a wire microphone, it is very easy to configure the system, and there is no danger of tangling or disconnection of lines. .

However, in the conventional wireless microphone system, one wireless microphone is allocated to each conference attendee, so that there is a limitation in channel allocation according to the used frequency band. If the number of wireless microphones connected to the system increases, Resulting in noise or crosstalk. In addition, since the wireless microphones are relatively more expensive than the wired microphones, there is a problem in that a high cost is incurred when the wireless microphones are allocated to the wireless microphones one by one.

Korean Registered Patent No. 20-0291337 (Registered Date: September 25, 2002)

Accordingly, in the present invention, at least one wired microphone can be connected to one wireless microphone in a wireless microphone device, and a voice signal input from a wired microphone through one wireless channel allocated to the wireless microphone can be transmitted together And a wireless microphone device and method capable of extending a microphone by which a plurality of users can transmit voice signals using one wireless microphone.

The present invention relates to a microphone-expandable wireless microphone device, comprising: a sound input unit for receiving a user's voice as a sound signal; an audio processing unit for generating a first sound signal with respect to the sound signal; A modulator for modulating the first audio signal to a predetermined first tone frequency and modulating an n th audio signal received from the link to a predetermined n th tone frequency, An RF unit for wirelessly transmitting an audio signal or an n-th audio signal using a carrier frequency; and a microphone unit for identifying a microphone ID of the first audio signal or the n-th audio signal, And a system controller for generating a n-th tone frequency and providing the n-th tone frequency to the modulator.

The system controller identifies a microphone ID assigned to the first audio signal or the n-th audio signal, and information on a corresponding microphone ID when the first audio signal or the n-th audio signal is wirelessly transmitted together To be transmitted.

The microphone ID is set in each wired microphone unit in the case of the wired microphone unit and is received together with the n-th voice signal through the link unit.

Each of the tone frequencies is a frequency allocated to the right and left of the carrier frequency by a predetermined frequency interval within a transmission bandwidth of the radio signal allocated to the RF unit.

Further, each tone frequency is characterized in that the tone frequencies are allotted to the frequency intervals which are calculated in advance so as not to interfere with each other.

The modulator performs the modulation by mixing the tone frequencies assigned to the respective voice signals when modulating the first voice signal or the n-th voice signal.

The apparatus may further include a switching unit for switching one of the first and n-th audio signals modulated at respective tone frequencies and applying the selected signal to the RF unit.

In addition, the wirelessly transmitted voice signal is demodulated using the same tone frequency used at the time of modulating the voice signal at the receiving side.

In addition, if there is a key input for requesting the setting of the microphone ID of the wireless microphone device, the system controller may check the microphone ID set in the wired microphone device and set a microphone ID other than the microphone ID set in the wired microphone device .

In addition, when receiving a signal requesting a microphone ID of another wired microphone device and the wireless microphone device from the wired microphone device, the system controller may transmit information on the microphone ID set in the other wired microphone device and the wireless microphone device .

According to another aspect of the present invention, there is provided a method of extending a microphone in a wireless microphone device, the method comprising: generating a first voice signal by inputting a user's voice input from the wireless microphone device; The method comprising: receiving the generated n-th audio signal; identifying a microphone ID of the first audio signal or the n-th audio signal; and generating the first tone frequency or n-th tone frequency corresponding to each ID Modulating the first voice signal to the first tone frequency and modulating the n th voice signal to the n th tone frequency; and modulating the modulated first voice signal or the n th voice signal to a carrier frequency And wirelessly transmitting the data.

In addition, the transmitting step may include transmitting information on a microphone ID corresponding to each voice signal when wirelessly transmitting the first voice signal or the n-th voice signal.

In the wired microphone device, the microphone ID is set by each wired microphone device and is received together with the n-th voice signal.

The generating step may include generating each tone frequency at a frequency allocated to the left and right at a predetermined frequency interval around the carrier frequency within a transmission bandwidth of a predetermined radio signal.

Further, each tone frequency is characterized in that the tone frequencies are allotted to the frequency intervals which are calculated in advance so as not to interfere with each other.

The modulating may include modulating the first or the n-th audio signal by mixing the tone frequencies allocated to the respective audio signals when the first or the n-th audio signal is modulated.

In addition, the wirelessly transmitted voice signal is demodulated using the same tone frequency used at the time of modulating the voice signal at the receiving side.

In the method, when there is a key input requesting the setting of the microphone ID of the wireless microphone device, the method further includes the step of identifying a microphone ID set in the wired microphone device and setting a microphone ID different from the microphone ID set in the wired microphone device Further comprising the steps of:

The step of setting the microphone ID may further include the steps of: when receiving a signal from the wired microphone device to inquire the other wired microphone device and the microphone ID of the wireless microphone device, And a step of providing information on the terminal device.

According to the present invention, at least one wired microphone can be connected to one wireless microphone in a wireless microphone device, and a voice signal input from a wired microphone can be transmitted together through one wireless channel assigned to the wireless microphone , It is possible to transmit voice signals of a plurality of users by using one wireless microphone, thereby increasing the efficiency of the wireless microphone and also greatly reducing the implementation cost of the wireless microphone system.

1 is a detailed block diagram of a wireless microphone system capable of extending a microphone according to an embodiment of the present invention;
2 is a detailed circuit diagram of a wireless microphone device according to an embodiment of the present invention,
FIG. 3 is a diagram illustrating an example in which two wired microphone devices are connected to one wireless microphone device according to an embodiment of the present invention.
4 is a flowchart of a signal processing between a wireless microphone device and a microphone receiving device capable of extending a microphone according to an embodiment of the present invention.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and these may be changed according to the intention of the user, the operator, or the like. Therefore, the definition should be based on the contents throughout this specification.

1 is a detailed block diagram of a wireless microphone system capable of extending a microphone according to an embodiment of the present invention.

2 shows a detailed circuit configuration of a wireless microphone device according to an embodiment of the present invention.

Referring to FIG. 1, the wireless microphone system of the present invention may include at least one wired microphone device 100, 110 and one wireless microphone device 120.

First, the wired microphone devices 100 and 110 may include voice input units 102 and 112, audio processing units 104 and 114, system control units 106 and 116, and the like.

The voice input units 102 and 112 receive voice of the user. The voice input units 102 and 112 include a mic module to receive a sound signal uttered by the user when the user speaks. At this time, the microphone module may be, for example, a condenser microphone, a dynamic microphone, or a ribbon microphone.

The audio processing units 104 and 114 generate acoustic signals, which are electrical signals, of the wired microphone user input through the audio input units 102 and 112.

The system control units 106 and 116 transmit the user's voice signal generated from the audio processing units 104 and 114 to the wireless microphone device 120 through the microphone connection line 170. [

The system control units 106 and 116 are connected to the wireless microphone apparatus 120 according to an embodiment of the present invention and transmit a voice signal of the user to the wireless microphone apparatus 120. In the wireless microphone apparatus 120, To the wireless microphone device 120 together with the voice signal, a microphone ID (ID) set for the wired microphone devices 100 and 110 for distinguishing the voice signal of the user of the wireless microphone device 100 and 110.

At this time, in the setting of the microphone ID, the user can input a key for setting the ID using a piano switch or the like formed on the wired microphone apparatus 100, 110, and the system control units 106, A microphone ID for the wired microphone device is set based on the input key. At this time, the setting operation of the microphone ID can be set through the same process in the wireless microphone device 120. For example, up to two wired microphone devices 100 and 110 may be connected to one wireless microphone device 120 The ID of the wireless microphone device 120 may be set to 1, and the IDs of the remaining wired microphone devices 100 and 110 may be set to 2, 3, and the like. However, the present invention is not limited thereto. In the setting operation of the microphone ID, a microphone ID is fixedly assigned to the two wired microphone devices 100 and 110 and the wireless microphone device 120 in advance, and when the user operates the piano switch or the like, Can be set. However, when the microphone ID is not fixedly assigned and the microphone device 1, 2, 3, or the like is selected to be selected, the system controller 134 of the wireless microphone device 120 sets each wired microphone device 100, 110 to recognize a microphone ID and display a warning when the same microphone ID is set, so that the microphone IDs are set so as not to overlap with each other.

Here, the operation of setting the microphone IDs to not overlap each other will be described in more detail.

First, a microphone ID setting button is provided on the wired microphone device 100 or 110 or the wireless microphone device 120 of one wireless microphone system. For example, when the user presses the microphone ID setting button of the wired microphone device 100, The wired microphone device 100 sends a signal to inquire about the microphone ID set in the wired microphone device 110 and the wireless microphone device 120 that are wired to each other and sends a signal to the other wired microphone device 110 and the wireless microphone It is possible to receive the microphone ID set in the device 120 and set the microphone ID so that the microphone ID does not overlap. In the case of setting the microphone ID in the other wired microphone device 110, the microphone ID can be set through the same process. In the case of the wireless microphone device 120, the microphone ID set in the wired microphone devices 100 and 110 can be set It is possible to set the microphone IDs so as not to overlap each other without sending a signal to the wired microphone apparatuses 100 and 110 to inquire about the microphone ID.

In the embodiment in which the microphone ID is set as described above, when the microphone ID setting is completed in each of the microphone devices 100, 110, and 120, the wireless microphone device 120 transmits the microphone ID to the microphone receiving device 140, A microphone ID set in the apparatuses 100, 110, and 120 may be provided so that the microphone receiving apparatus 140 can identify the microphone ID.

Next, the wireless microphone device 120 includes a power unit 121, an audio input unit 122, an audio processing unit 124, a link unit 126, a modulator unit 128, a switching unit 130, an RF unit 132, A system control unit 134, and the like.

The power supply unit 121 may include a power on / off switch. When the power is turned on, the power supply unit 121 supplies a power input from the outside to each component so that the system can operate. do.

The voice input unit 122 inputs the voice of the user of the wireless microphone device 120.

The audio processing unit 124 generates a voice of the user of the wireless microphone device 120 input through the voice input unit 122.

The link unit 126 is an interface device for connecting the wired microphone apparatuses 100 and 110. When the wired microphone apparatuses 100 and 110 are connected to the wired microphone apparatuses 100 and 110, And provides it to the modulation unit 128.

3 illustrates a concept of a microphone-expandable wireless microphone device 120 in which two wired microphone devices 100 and 110 are connected to a single wireless microphone device 120 through a link unit 126, The wireless microphone device 120 may include the link unit 126 and may be connected to the wired microphone devices 100 and 110. In the embodiment of the present invention, the link unit 126 can connect up to two wired microphone devices 100 and 110, but the present invention is not limited thereto.

The modulating unit 128 modulates the audio signal of the user of the wireless microphone device 120 input through the audio processing unit 124 of the wireless microphone device 120 or the audio signal of the user of the two wired microphone devices 100, and 110, a tone frequency corresponding to a microphone ID assigned to each microphone device is mixed to perform modulation on each voice signal.

That is, as shown in FIG. 2A, for example, when the audio signal (audio) is input from the wireless microphone device 120 corresponding to the microphone ID (ID) # 1 , The A tone frequency (tone A) corresponding to the microphone ID 1 is mixed with the voice signal and modulated.

When a voice signal is input from the wired microphone device 100 corresponding to the microphone ID # 2, the B tone frequency corresponding to the microphone ID # 2 is mixed with the voice signal and modulated.

When a voice signal is input from the wired microphone device corresponding to the microphone ID # 3, the C tone frequency corresponding to the microphone ID # 3 is mixed with the voice signal and modulated.

At this time, the tone frequency may be generated at different frequencies in order to distinguish voice signals of the wireless microphone device 120 and the users of the wired microphone devices 100 and 110 in the receiving-side microphone receiving device 140. [ That is, for example, as shown in FIG. 2 (b), an A tone frequency can be generated for the ID number 1 of the wireless microphone device 120, and ID numbers 2 and 3 of the wired microphone devices 100 and 110, For No. 3, B tone frequency and C tone frequency can be generated.

In addition, the tone frequency may be formed to be spaced from the carrier frequency (fc) allocated to the wireless microphone device 120 by a predetermined frequency interval to the left and right, But the present invention is not limited thereto.

The signal modulated through the modulation unit 128 may be selected through the switching unit 130 under the control of the system control unit 134 and the selected voice signal may be transmitted to the RF unit 132. [ To be mixed with the carrier frequency fc, and then wirelessly transmitted.

The switching unit 130 is switched according to the control of the system control unit 134 to selectively convert one voice signal to a radio frequency (RF) signal when the modulated voice signal is mixed with the tone frequency from the modulation unit 128 132.

The RF unit 132 mixes the tone frequencies corresponding to the wired microphone apparatuses 100 and 110 or the wireless microphone apparatus 120 so that the modulated voice signal is selectively supplied through the switching unit 128, (Fc) for wireless transmission to the voice signal, and wirelessly transmits the mixed voice signal to the microphone receiving device 140.

The microphone receiving device 140 may be a device that receives a voice signal transmitted from the wireless microphone device 120 and outputs the voice signal through a speaker 150 or the like. It is possible to simply perform an operation of outputting a voice signal transmitted from the wireless microphone device 120 to the speaker 150 or the like or to perform the operation of the wired microphone device 120 connected to the wireless microphone device 120 or the wireless microphone device 120 100, and 110), and the like.

The system control unit 134 performs overall control of each component of the wireless microphone device 120. [

The audio signal of the user of the wireless microphone device 120 input through the audio processing unit 124 of the wireless microphone device 120 or the audio signal of the two wired microphones input through the link unit 126, Identifies the user's voice signal of the apparatuses 100 and 110 using a microphone ID, generates a tone frequency corresponding to each voice signal, and provides the generated tone frequency to the modulation unit 128. [

Accordingly, the voice signal of the user of the wireless microphone device 120 or the voice signal of the user of the two wired microphone devices 100 and 110 are modulated at different tone frequencies so that the wired microphone device 120, The voice signal input from the wireless microphone apparatuses 100 and 110 and the voice signal of the wireless microphone apparatus 120 are distinguished from each other and can be wirelessly transmitted.

At this time, the receiving-side microphone receiving device 140 can demodulate and output the voice signals of the respective users by using the tone frequency corresponding to the microphone ID allocated to each microphone device, so that a single wireless microphone device 120 can receive a plurality of wired The microphone devices 100 and 110 can be connected and used together.

FIG. 4 illustrates a signal processing flow between a wireless microphone device and a microphone receiving device capable of extending a microphone according to an embodiment of the present invention. Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4. FIG.

The user of the wireless microphone device 120 can set a microphone ID for the wireless microphone device 120 in a state where at least one wired microphone device 100 or 110 is connected to the wireless microphone device 120. [ At this time, in the setting of the microphone ID, the user can request the microphone ID setting by inputting the preset microphone ID setting key or the like to the wireless microphone device 120, and the microphone ID setting key is, for example, A piano switch, and the like, but is not limited thereto.

If the user requests to set a microphone ID for the wireless microphone device 120, the system controller 134 sets a microphone ID for the wireless microphone device 120 (S400). The setting operation of the microphone ID may be performed in the same manner as the method of setting the microphone ID of the wireless microphone device 120 in the wired microphone devices 100 and 110 connected to the wireless microphone device 120. [

2, it is assumed that a maximum of two wired microphone devices 100 and 110 are connected to the wireless microphone device 120. In this case, The microphone ID may be set to 1, and the microphone IDs of the remaining wired microphone devices 100 and 110 may be set to 2, 3, and so on, but the present invention is not limited thereto.

When the microphone ID for the wireless microphone device 120 is set as described above, the system controller 134 of the wireless microphone device 120 generates a tone frequency corresponding to the microphone ID (S402). When two wired microphone devices 100 and 110 are connected to the wireless microphone device 120, the system controller 134 recognizes the microphone IDs of the wired microphone devices 100 and 110, 100, and 110, respectively. At this time, the tone frequency may be generated at different frequencies in order to distinguish voice signals of the wireless microphone device 120 and the users of the wired microphone devices 100 and 110 in the receiving-side microphone receiving device 140. [

That is, for example, as shown in FIG. 2, the system control unit 134 can generate the A tone frequency for the ID number 1 of the wireless microphone apparatus 120, and the ID number 2 and 3 of the wired microphone apparatus B tone frequency, C tone frequency can be generated.

The system controller 134 then provides the tone frequency for each microphone device to the modulator 128 so that the voice signals of the user input from the wireless microphone device 120 or the wired microphone devices 100 and 110 And is modulated to another tone frequency (S404).

At this time, in the modulator 128, for example, the audio signal of the wireless microphone device 120 corresponding to ID 1 can be modulated by mixing the A tone frequency corresponding to the microphone ID 1 with the audio signal. When a voice signal is input from the wired microphone devices 100 and 110 corresponding to the microphone ID # 2, the B tone frequency corresponding to the ID # 2 is input to the voice signals of the wired microphone devices 100 and 110 as the voice signal Can be mixed and modulated. When a voice signal is input from the wired microphone apparatuses 100 and 110 corresponding to the ID number 3, the frequency of the C tone corresponding to the ID number 3 is set to the voice signal of the wired microphone apparatus 100 and 110, .

The system controller 134 controls the switching unit 130 so that the audio signal inputted from the wireless microphone apparatus 120 or the wired microphone apparatus 100 or 110 is modulated through the modulation unit 128. [ So as to select a voice signal to be modulated.

Accordingly, the audio signal selected by the switching unit 130 is applied to the RF unit 132, mixed with the carrier frequency, and wirelessly transmitted (S404). Therefore, the voice signal of the user of the wireless microphone device 120 or the voice signal of the user of the two wired microphone devices 100 and 110 are modulated at different tone frequencies, The voice signals input from the devices 100 and 110 can be distinguished from each other and transmitted wirelessly.

Meanwhile, the voice signal transmitted as described above may be received by the microphone receiving apparatus 140 (S408). Then, when the microphone receiving apparatus 140 receives a voice signal to be transmitted wirelessly, it identifies a microphone ID set for each microphone apparatus (S410).

Next, the microphone receiver 140 generates a tone frequency assigned to the identified microphone ID (S412), demodulates the voice signal transmitted from the wireless microphone device 120 using the generated tone frequency (S414) The speaker 150, and the like (S416).

Accordingly, a plurality of wired microphone devices 100 and 110 can be connected to one wireless microphone device 120 and used together.

As described above, according to the present invention, in the wireless microphone device, at least one wired microphone can be connected to one wireless microphone, and a voice signal input from the wired microphone through one wireless channel allocated to the wireless microphone So that it is possible to transmit voice signals of a plurality of users by using one wireless microphone, thereby increasing the efficiency of the wireless microphone and also greatly reducing the implementation cost of the wireless microphone system.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should not be limited by the described embodiments but should be defined by the appended claims.

100, 110: wired microphone device 120: wireless microphone device
121: voice input unit 122: power supply unit
124: Audio processing unit 126: Link unit
128: Modulation unit 130:
132: RF section 134: system control section

Claims (19)

A voice input unit for receiving a user's voice as an acoustic signal;
An audio processing unit for generating a first audio signal with respect to the acoustic signal,
A link unit connected to at least one wired microphone device,
A modulator for modulating the first audio signal to a predetermined first tone frequency and modulating an n-th audio signal received from the link to a predetermined n-th tone frequency,
An RF unit for wirelessly transmitting the modulated first audio signal or the n-th audio signal using a carrier frequency;
A system controller for identifying a microphone ID of the first audio signal or the n-th audio signal, generating the first tone frequency or n-th tone frequency corresponding to each ID,
A microphone device comprising: a microphone;
The method according to claim 1,
The system control unit includes:
Wherein the control unit identifies the microphone ID assigned to the first or nth voice signal and controls the information on the corresponding microphone ID to be transmitted together when wirelessly transmitting the first or nth voice signal. Microphone expandable wireless microphone device.
The method according to claim 1,
In the microphone ID,
Wherein the wired microphone device is set by each wired microphone device and received together with the n-th voice signal through the link portion.
The method according to claim 1,
Each tone frequency,
Wherein the RF signal is a frequency allocated to the left and right at a predetermined frequency interval around the carrier frequency within a transmission bandwidth of a radio signal allocated to the RF unit.
5. The method of claim 4,
Each tone frequency,
And the signals are spaced apart from each other by the frequency interval calculated so as not to interfere with each other.
The method according to claim 1,
Wherein the modulator comprises:
Wherein the modulation is performed by mixing the tone frequencies assigned to the respective voice signals when modulating the first voice signal or the n-th voice signal.
The method according to claim 1,
The apparatus comprises:
Further comprising a switching unit for switching one of the first and n-th audio signals modulated to respective tone frequencies and applying the selected switching signal to the RF unit.
The method according to claim 1,
The audio signal to be wirelessly transmitted,
Wherein the demodulating unit is demodulated using the same tone frequency used in modulating the voice signal on the receiving side.
The method according to claim 1,
The system control unit includes:
Wherein when the key input requesting the setting of the microphone ID of the wireless microphone device is present, the microphone ID set in the wired microphone device is checked to set a microphone ID different from the microphone ID set in the wired microphone device. A possible wireless microphone device.
10. The method of claim 9,
The system control unit includes:
When receiving a signal requesting the other wired microphone device and the microphone ID of the wireless microphone device from the wired microphone device, provides information on the microphone ID set in the other wired microphone device and the wireless microphone device Scalable wireless microphone device.
Generating a first audio signal by inputting a user's voice input from a wireless microphone device;
Receiving an n-th voice signal generated from at least one wired microphone device connected to the wireless microphone device;
Identifying a microphone ID of the first audio signal or the n-th audio signal;
Generating the first tone frequency or nth tone frequency corresponding to each ID;
Modulating the first speech signal to the first tone frequency and modulating the nth speech signal to the nth tone frequency,
Transmitting the modulated first voice signal or the n-th voice signal wirelessly using a carrier frequency
/ RTI >
12. The method of claim 11,
Wherein the transmitting comprises:
And transmitting information on a microphone ID corresponding to each voice signal when wirelessly transmitting the first voice signal or the n-th voice signal.
12. The method of claim 11,
In the microphone ID,
Wherein the wired microphone device is set by each wired microphone device and received together with the n-th voice signal.
12. The method of claim 11,
Wherein the generating comprises:
And generating each tone frequency at a frequency allocated at a predetermined frequency interval to the left and right around the carrier frequency within a transmission bandwidth of the predetermined radio signal.
15. The method of claim 14,
Each tone frequency,
Wherein the first and second signals are spaced apart from each other by the frequency interval calculated so as not to interfere with each other.
12. The method of claim 11,
Wherein the modulating comprises:
And performing the modulation by mixing the tone frequencies allocated to the respective voice signals when modulating the first voice signal or the n-th voice signal.
12. The method of claim 11,
The audio signal to be wirelessly transmitted,
Wherein the demodulation is performed using the same tone frequency used when modulating the voice signal on the receiving side.
12. The method of claim 11,
The method comprises:
If the key input requesting the setting of the microphone ID of the wireless microphone device is found, checking the microphone ID set in the wired microphone device and setting a microphone ID different from the microphone ID set in the wired microphone device Features a microphone extension method.
19. The method of claim 18,
Wherein the setting of the microphone ID comprises:
And providing information on the microphone ID set in the other wired microphone device and the wireless microphone device when receiving a signal from the wired microphone device to inquire about the other wired microphone device and the microphone ID of the wireless microphone device Features a microphone extension method.
KR1020150157177A 2015-11-10 2015-11-10 A wireless microphone apparatus capable of connecting additional wire microphones and method thereof KR101811791B1 (en)

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