KR100661548B1 - A wireless microphone apparatus using a mobile communication terminal with a bluethooth module and a bluetooth receiver and the embodiment method thereof - Google Patents

Abstract

The present invention relates to a microphone device using a mobile communication terminal, and more particularly, when an audio signal and a control signal inputted from a microphone of the mobile communication terminal are transmitted in a Bluetooth manner, the Bluetooth receiving module can receive it and output it to the amplifier. The present invention relates to a wireless microphone apparatus using a mobile communication terminal and an implementation method thereof.

A mobile communication terminal of the present invention for achieving the above object, a mobile communication terminal having a Bluetooth module for transmitting a microphone input audio signal and a keypad input control signal by a Bluetooth method, and a Bluetooth method transmitted from the mobile communication terminal After receiving the signal of the demodulator and output to the amplifier,

Since the mobile phone can be used as a wireless microphone that can control the sound output, balance, etc. of the amplifier from a remote location, it provides an effect of lowering the price of the wireless microphone system.

Mobile terminal, microphone, bluetooth, amplifier, receiver

Description

A wireless microphone apparatus using a mobile communication terminal with a bluethooth module and a bluetooth receiver and the embodiment method

1 is a view showing a wireless microphone system in the prior art,

2 is a view showing the configuration of a microphone device using a mobile communication terminal according to the present invention,

3 is a block diagram illustrating a schematic internal configuration of a mobile communication terminal of FIG. 2;

4 is a flowchart illustrating an operation process for transmitting a Bluetooth signal of a mobile communication terminal of FIG.

FIG. 5 is a block diagram illustrating an internal configuration of a Bluetooth receiver in the configuration of FIG. 2;

6 is a flowchart illustrating a process for restoring a Bluetooth signal in the Bluetooth receiver of FIG.

* Description of Major Symbols in Drawings *

1: wireless microphone 1 ', 2: transmitter

2: pin microphone 3: receiver

4: Amp

100: mobile communication terminal 200: Bluetooth receiver

150: Bluetooth module

151: first Bluetooth signal processor 152: first baseband signal processor

153: 2nd RF Division

201; First RF section 202: Second baseband signal processing section

203: second Bluetooth signal processor 204: second audio signal processor

205: amplifier control signal processing unit

The present invention relates to a microphone device using a mobile communication terminal, and more particularly, when an audio signal and a control signal inputted from a microphone of the mobile communication terminal are transmitted in a Bluetooth manner, the Bluetooth receiving module can receive it and output it to the amplifier. The present invention relates to a wireless microphone apparatus using a mobile communication terminal and an implementation method thereof.

1 is a view showing a wireless microphone system in the prior art.

As shown in Fig. 1, the wireless microphone system in the prior art includes a receiver 3 for receiving an audio signal transmitted from the wireless microphone 1 or the pin microphone 2 and the wireless microphone 1 or the pin microphone 2. And an amplifier 4 for amplifying and outputting an audio signal output from the receiver.

In the above-described configuration, the wireless microphone 1 and the pin microphone 2 modulate the input audio signal to FM and transmit the FM to a receiver having a band of VHF to UHF. The receiver 3 performs filtering and noise reduction on the radio signals received from the radio microphone 1 and the pin microphone 2 to extract the original audio signal, and then inputs the audio signal to the audio input terminal of the amplifier 4. (4) amplifies and outputs an audio signal introduced into an audio input terminal.

As described above, the wireless microphone system of the related art requires an expensive wireless microphone 1 or a transmitter 1 ', 2' connected in a wired manner to an inexpensive pin microphone 2, and receives an FM modulated signal. The receiver 3 can be used separately. In addition, two antennas 3 'are required because antenna diversity is used to improve voice quality. In addition, in order to perform volume control, balance control, and sound control of the amplifier, the user should always move to the receiver 3 to adjust the receiver 3. For this reason, the prior art wireless microphone system having the above-described configuration not only decreases simplicity but also adds cost burden.

That is, the above-described wireless microphone system of the prior art,

First, since the wireless transmitter connected to the microphone must be purchased separately for the wireless microphone system, the cost is expensive.

Second, because FM modulation is performed for signal transmission to the wireless microdepartment receiver and the transmission band between VHF and UHF is used, a receiver using two antennas is required to improve voice quality. Has

Third, the wireless microphone system of the prior art as described above is responsible for the adjustment of the speaker at the receiver side, so that a user using the wireless microphone has to move to the receiver side to control the volume control.

Accordingly, the present invention is to solve the problems of the wireless microphone system in the prior art described above, when the mobile communication terminal transmits the audio signal and the control signal in a Bluetooth communication method, the receiver receives it and the audio signal is an amplifier It is an object of the present invention to provide a wireless microphone apparatus and a method for implementing the same, which are outputted through the mobile communication terminal to perform the volume control, balance adjustment, and sound control of the amplifier according to the amplifier control signal.

Wireless microphone device using a mobile communication terminal of the present invention for achieving the above object, a mobile communication terminal having a Bluetooth module for transmitting a microphone input audio signal and a keypad input control signal by a Bluetooth method, and the mobile communication terminal It is characterized by consisting of a receiver for demodulating and outputting the signal after receiving the Bluetooth signal transmitted from the.

The Bluetooth module includes a first Bluetooth signal processor for converting an audio signal and an amplifier control signal input from the microphone and the keypad into a Bluetooth data packet, and an analog modulation of the Bluetooth data packet output from the mobile phone Bluetooth signal processor. A first baseband signal processor for generating and outputting a baseband signal and a first RF signal for converting the baseband signal output from the first baseband signal processor to an RF signal and then converting the signal into an RF signal; It is characterized in that the configuration.

The receiver may include a second RF unit for converting an RF signal received from the first RF unit of the mobile phone into a baseband signal and outputting the baseband signal, and a baseband signal input from the second RF unit. A second baseband signal processing unit for converting and outputting the packet data, a second Bluetooth signal processing unit for demodulating the digital Bluetooth packet data output from the second baseband signal processing unit and separating and outputting an audio signal and an amplifier control signal; A second audio signal processing unit for converting the audio signal output from the second Bluetooth signal processing unit into an analog signal and outputting the audio signal to the audio input terminal of the amplifier, and the amplifier control signal according to the amplifier control signal output from the second Bluetooth signal processing unit; Characterized in that it comprises an amplifier control signal processing unit for controlling the drive.

The amplifier control signal may be a volume control, balance control, a bass function setting and release of the amplifier, such a control signal may be input to the control command by the up and down navigation keys, shortcut keys, etc. of the keypad of the mobile communication terminal. The mobile communication terminal may further include a user interface screen for controlling the amplifier to input the control command of the amplifier.

Wireless microphone device implementation method using a mobile communication terminal according to the present invention, the Bluetooth packet transmission process of converting the microphone input audio signal and keypad input control signal of the mobile communication terminal to the Bluetooth packet data and then sent to the RF signal, and the Bluetooth After receiving the RF signal transmitted from the packet transmission section, the demodulation is performed by the amplifier control process for outputting the audio signal and the control signal.

The Bluetooth packet transmission process may include converting a microphone input audio signal and the keypad input control signal of the mobile communication terminal into a Bluetooth packet, and outputting the first Bluetooth packet and the Bluetooth packet output in the Bluetooth packet generation step. A first baseband signal generating step of converting and outputting a baseband signal, a frequency upconverting step of frequency upconverting the baseband signal output in the baseband signal generating step and outputting the RF signal, and the frequency upconverting step It is characterized in that the RF signal transmission step of transmitting the RF signal output from the.

The amplifier control process includes an RF signal receiving step of receiving an RF signal transmitted in the Bluetooth packet transmission process, and a second basis for converting the RF signal transmitted in the RF signal receiving process into a baseband signal by frequency downconversion. A band signal generation step, a digital signal conversion step of converting an analog baseband signal output in the second baseband signal generation step into a digital Bluetooth packet, and outputting the digital signal; And an amplifier control step of outputting an audio and video signal output from the second Bluetooth signal processing step to an amplifier and a second Bluetooth signal processing step of extracting an amplifier control signal.

The above-described mobile communication terminal of the present invention includes both a mobile phone, a PDA, and the like that the user can carry and voice and data communication through the mobile communication network.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a system configuration diagram of a wireless microphone device using a mobile communication terminal according to an embodiment of the present invention.

As shown in FIG. 2, the wireless microphone apparatus using a mobile communication terminal according to an embodiment of the present invention includes a mobile communication terminal 100 for converting and outputting voice and data signals to RF signals by a Bluetooth method, and After receiving the RF signal output from the mobile communication terminal 100 and demodulated, it is configured to include a Bluetooth receiver 200 for separating and outputting the audio and control signal by the demultiplexing.

The RF signal for communication between the mobile communication terminal 100 and the Bluetooth receiver 200 is a high frequency signal of an Industrial Scientific Medical (ISM) band (2.402 GHz to 2.480 GHz) band modulated by GFSK (Guassian Frequency Shift Keying). It is preferable.

Version 1.0 of the above-mentioned Bluetooth specification is 2.4GHz Industrial Science Medical (ISM) band (2.402GHz ~ 2.480GHz), transmission speed of 1Mbps, frequency hopping scheme for interference prevention (79/23 hop, 1600 hop / sec ) Low power consumption (0.3mA standby, max 30mA when transmitting / receiving), transmission distance up to 100m with 10m and Option, transmission power of Class 1,2,3 (100mW, 2.5mW, 1mW each), GFSK (GFSK: Guassian Frequency Shift Keying Modulation, 3 Channel Voice Support (A-Law, u-Law PCM, CVSD), Point-to-Point or Point-to-Multi Connectivity And so on.

The above-described Bluetooth standard is for explaining the Bluetooth function of the present invention and is not intended to limit the present invention.

FIG. 3 is a block diagram showing an internal configuration of the mobile communication terminal of FIG. 2, and FIG. 4 is a flowchart showing a process of transmitting audio and data control signals by the Bluetooth method in the mobile communication terminal of FIG.

As shown in FIG. 3, the mobile communication terminal of FIG. 2 is connected to the keypad unit 101, the microphone 112, the speaker 113, and the keypad unit 101, and has a key input from the keypad unit 101. Analog signal for the audio signal input from the microphone 10 and the audio signal to be output to the speaker 113 connected to the key signal processing unit 111 and the microphone 112 and the speaker 113 for outputting a control command corresponding to the signal A control unit (MSM) 110 including a first audio signal processing unit 114 for performing audio signal processing such as digital conversion or digital analog conversion, and restoring a compressed signal by vocoding and inverse vocoding. It is composed.

In addition, the keypad 101 is operated by an operation button (not shown) for using the mobile communication terminal as a microphone and is inputted from the audio signal processing unit 114 of the mobile communication terminal. ) And a Bluetooth module 150 for converting and outputting the control signal of the amplifier 4 input through the key signal processing unit 111 into a Bluetooth format.

The Bluetooth module 150 includes the first Bluetooth signal processor 151, the first baseband signal processor 152, and the first RF unit 153.

The first Bluetooth signal processor 151 converts the amplifier control signal input from the key signal processor 111 of the controller 110 and the audio input to the first audio signal processor 114 into a data packet of a Bluetooth format and then outputs the converted data packet. do.

The first baseband signal processing unit 152 converts the data packet output from the first Bluetooth signal processing unit 151 into a baseband analog signal and outputs it, downconverts an RF signal received from the outside, and digitally modulates the Bluetooth format. Generates the packet data having the input to the first Bluetooth signal processor 151.

The first RF unit 153 modulates the baseband analog signal output from the first baseband signal processing unit 152 and then up-converts the frequency to generate a high frequency signal of 2,4Ghz ISM band and then externally. The high frequency signal of the GFSK signal modulated 2,4Ghz ISM band received from the outside is converted to a baseband signal by performing frequency downconversion and then output to the first baseband signal processor 152.

Referring to FIGS. 3 and 4, a process of transmitting an audio and data control signal by a Bluetooth method in the mobile communication terminal of FIG. 3 having the above-described configuration will be described.

When the user inputs the microphone selection key of the keypad 101 to use the mobile terminal as a microphone, the controller 110 drives the Bluetooth module 150 through the key signal processor 111 (S100).

After the S100 process, the user inputs a voice through a microphone and inputs an amplifier control signal for adjusting the volume, sound quality, etc. of the amplifier through the keypad as needed. Then, the first audio signal processor 114 converts a user's voice into a digital audio signal and inputs it to the Bluetooth module 150. The key signal processor 111 also receives an amplifier control signal corresponding to the key value of the keypad 101. Input to the Bluetooth module 150 (S110). In this case, the up and down arrow keys of the keypad are preferably used as a volume control key. In addition, the mobile communication terminal may be configured to output an interface screen for the amplifier control to the LCD so that the user can input a control command for the amplifier control through the keypad.

The first Bluetooth signal processor 151 of the Bluetooth module 150 driven in step S110 adjusts the volume of the audio signal input from the first audio signal processor 114 and the keypad 101, and a bass woofer. After multiplexing the control signal, such as the driving and stop of the encapsulated into packet data according to the Bluetooth transmission method and outputs to the first baseband signal processing unit 152 (S120).

After the process S120, the first baseband signal processor 152 generates the baseband RF signal by receiving the Bluetooth packet data and converting it into an analog digital signal, and outputs the baseband RF signal to the first RF unit 153 (S130).

After receiving the baseband RF signal in step S140, the first RF unit 153 frequency-converts the received baseband signal to generate a high frequency signal of a GFSK modulated 2.4Ghz ISM band, and then performs an antenna (not shown). By transmitting to the outside through the processing of the output of the audio and amplifier control signal in the mobile communication terminal embedded Bluetooth module.

5 is a block diagram showing the internal configuration of the Bluetooth receiver 200 of FIG.

As shown in FIG. 5, the Bluetooth receiver 200 of FIG. 3 includes a second RF unit 201 for receiving an RF signal transmitted from the first RF unit 153, and an output terminal of the second RF unit 201. A second baseband signal processing unit 202 provided at an output terminal of the second baseband signal processing unit 202 and an output terminal of the second Bluetooth signal processing unit 203 and the second Bluetooth signal processing unit 203. A second audio signal processing unit 204 and the amplifier control signal processing unit 200, the output of the second audio signal processing unit 204 and the amplifier control signal processing unit 205, respectively, the audio input terminal (Fig. And a control terminal (not shown).

FIG. 6 is a flowchart illustrating a signal processing process in the Bluetooth receiver 200 having the configuration of FIG. 5. Referring to FIG. 6, the operation process of the Bluetooth receiver 200 of FIG. 5 will be described below.

First, the second RF unit 201 receives the RF signal transmitted from the first RF unit 153 of the mobile communication terminal (S200), and then performs frequency downconversion and GFSK signal demodulation to convert the Bluetooth packet into a baseband signal. After the conversion, the converted baseband signal is output to the second baseband signal processor 202 (S210).

After the S210 process, the second baseband signal processing unit 202 generates the packet data encapsulated in the Bluetooth manner by the analog digital conversion of the baseband signal output from the second RF unit 201 and then the second Bluetooth signal processing unit ( 203).

After the process S220, the second Bluetooth signal processor 203 restores the audio signal and the amplifier control signal from the encapsulated packet data, and outputs the audio signal to the second audio signal processor 204, and the amplifier control signal is the amplifier control signal. Output to the processing unit 205 (S240).

After the process S240, the second audio signal processor 204 analog-converts the audio signal input from the second Bluetooth signal processor 203, inputs it to the audio input terminal of the amplifier 4, and then amplifies the sound signal amplified by the amplifier. Output The amplifier control signal processing unit 205 receives the amplifier control signal applied from the second Bluetooth signal processing unit 203, and then receives the amplifier control signals such as volume control, driving and stopping of the bass woofer, and balance control. The output is controlled to control the amplifier (S250).

After the S250 process, it is determined whether there is an RF signal transmitted from the mobile communication terminal 100 (S260). If there is a reception of the RF signal, the process moves to the process S210 to repeat the process, and the RF signal is not received. In this case, the signal processing by the Bluetooth receiver 200 ends.

In the above-described present invention, since a mobile communication terminal can be used as a microphone in providing a wireless microphone device, it is possible to reduce the cost for purchasing a wireless microphone having an expensive transmitter separately.

In addition, the present invention described above does not use the FM modulation and the band between VHF and UHF, and uses the GFSK communication method and the 2.4Ghz ISM band (Industrial Scientific Medicine band), so that the signal does not need to implement antenna diversity. Since it can receive the receiver provides a further cost savings in that the receiver having a single antenna can be used.                     

In addition, the present invention described above, unlike the microphone, which transmits only the voice signal in the prior art, it is possible to transmit the data packet to control the operation of the amplifier in the remote by generating the control signal of the amplifier in the mobile communication terminal and transmitting to the receiver It provides the effect of doing so.

Claims (8)

A mobile communication terminal equipped with a Bluetooth module for transmitting a microphone input audio signal and a keypad input control signal; And a receiver configured to receive an audio signal and a control signal transmitted from the mobile communication terminal, and then demodulate and output the output signal to the amplifier. The method of claim 1, wherein the Bluetooth module, A first Bluetooth signal processor for converting an audio signal and an amplifier control signal inputted from the microphone and the keypad into a Bluetooth data packet and outputting the converted Bluetooth data packet; A first baseband signal processor for generating and outputting a baseband signal by analog-converting the Bluetooth data packet outputted from the first Bluetooth signal processor; And a first RF unit for converting the baseband signal output from the first baseband signal processing unit into frequency upconversion and converting the RF signal into an RF signal. The method of claim 1, wherein the receiver, A second RF unit for converting an RF signal received from the first RF unit of the mobile phone into a baseband signal and outputting the baseband signal; A second baseband signal processor for converting the baseband signal inputted from the second RF unit into digital Bluetooth packet data and outputting the converted data; A second Bluetooth signal processor for demodulating the digital Bluetooth packet data output from the second baseband signal processor and separating and outputting an audio signal and an amplifier control signal; A second audio signal processor converting the audio signal output from the second Bluetooth signal processor into an analog signal and outputting the audio signal to an audio input terminal of the amplifier; Wireless microphone device using a mobile communication terminal, characterized in that it comprises an amplifier control signal processing unit for controlling the driving of the amplifier in accordance with the amplifier control signal output from the second Bluetooth signal processing unit. 4. The wireless microphone apparatus according to any one of claims 1 to 3, wherein the RF signal is modified by a GPS escaping device. The wireless microphone apparatus of claim 4, wherein the RF signal is an ISM band signal. A Bluetooth packet transmission process of converting a microphone input audio signal and a keypad input control signal of a mobile communication terminal into Bluetooth packet data and then transmitting them as an RF signal; A method of implementing a wireless microphone device using a mobile communication terminal, characterized in that it comprises an amplifier control process for receiving the RF signal transmitted in the Bluetooth packet transmission process and demodulate and output the audio and control signals to the amplifier. The method of claim 6, wherein the Bluetooth packet transmission process, Generating a first Bluetooth packet by converting the microphone input audio signal and the keypad input control signal of the mobile communication terminal into a Bluetooth packet; A first baseband signal generation step of converting and outputting the Bluetooth packet outputted in the Bluetooth packet generation step into an analog baseband signal; A frequency up-converting step of frequency up-converting the baseband signal output in the baseband signal generating step and outputting the RF signal; RF signal transmission step of transmitting the RF signal output in the frequency up-conversion step, characterized in that the wireless microphone device implementation method using a mobile communication terminal. The method of claim 6, wherein the amplifier control process, An RF signal receiving step of receiving an RF signal transmitted in the Bluetooth packet transmission process; A second baseband signal generation step of converting the RF signal transmitted in the RF signal receiving process into a baseband signal by frequency downconversion; A digital signal conversion step of converting the analog baseband signal output in the second baseband signal generation step into a digital Bluetooth packet and outputting the digital Bluetooth packet; A second Bluetooth signal processing step of extracting the audio signal and the amplifier control signal from the Bluetooth packet output in the digital signal conversion process;  And an amplifier control step of outputting the audio and video signals output from the second Bluetooth signal processing step into an amplifier.

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