KR100843722B1 - Multifunctional microphone device for karaoke in car - Google Patents

Abstract

A multifunctional microphone for performing a singing room effect in a car is provided to improve sound quality inside the car by suppressing howling using a directional microphone and a howling suppresser. A microphone input portion(10) inputs a voice signal from a microphone(11) and has howling suppressing and echo controlling functions. A line input portion(20) includes an external line input terminal(21) and receives audio signals from external devices. A mixer portion(30) mixes the voice signal from the microphone input portion with the audio signals from the line input portion. A film transmitter(50) modulates the output signal from the mixer portion to an FM(Frequency Modulation) radio signal. A line output portion(60) outputs the output signal from the mixer portion through a line output terminal. A switch portion includes a microphone input on/off switch, a howling and echo on/off switch, a volume switch, an FMT(Frequency Modulation Transmission) on/off signal, and an FMT frequency selecting switch. A controller(40) controls the components based on manipulation signals from the switch portion.

Description

Multifunctional microphone device for car karaoke

1 is a block diagram of a vehicle navigation remote control integrated multi-function microphone device according to the present invention

2 is a directional characteristic diagram of a microphone for explaining a unidirectional microphone characteristic applied to the present invention.

Figure 3 is a detailed configuration of the multi-function microphone device for a vehicle navigation remote control integrated karaoke system according to the present invention.

Figure 4 is a microphone input unit configuration of the multifunction microphone device according to the present invention.

5 is a block diagram of a line input unit of the multifunction microphone device according to the present invention;

6 is a block diagram of an FM transmitter of the multifunction microphone device according to the present invention;

7 is a block diagram of a navigation remote control function of the multifunction microphone device according to the present invention;

8 is an exemplary view of appearance of a multifunctional microphone device according to the present invention;

9 is a bottom configuration diagram of a multifunction microphone device according to the present invention;

10 is an exemplary view of a howling remover applied to the present invention.

11 is an exemplary view of a voice remover applied to the present invention.

<Description of the symbols for the main parts of the drawings>

10: microphone input unit 11: microphone

12: amplification unit 13: howling eliminator

14: echo control unit 15: microphone volume control switch

16: Howling removal on / off switch 17: Eco on / off switch

18: echo intensity control switch 19: microphone on / off switch

20: line input section 21: line input terminal

22: voice remover on / off switch 23: voice remover

30: mixer 40: control unit

50: FM transmitter 51: FMT on / off switch

52: FM modulator

53: FMT frequency selection switch 54: antenna matching part

55 antenna 60 line output unit

61: line output terminal 70: remote control keypad

80: remote control wireless transmitter 90: power supply

101: microphone power on / off switch 110: microphone / echo control switch

120: wireless microphone control switch

The present invention relates to a microphone that can be applied to a karaoke system for a vehicle, and more specifically, a song accompaniment input of an external audio device is input and mixed with a microphone voice signal to enable wireless or wired output to a vehicle radio device for a karaoke function. To provide a microphone that can be used as a microphone device, and to perform a microphone alone function and an external audio input alone function, the microphone can be configured as an integrated device with a remote controller of a vehicle navigation device to reduce cost and increase convenience of use. A vehicle multifunction microphone device is disclosed.

Recently, most navigation devices used in automobiles are becoming multifunctional to have a complex function. For example, in addition to the basic navigation function, it has a DMB function and a music player function. When an optional navigation device is installed at the time of launch, the audio output of the navigation is output to the audio speaker of the car. If it is installed separately, audio output is made through the speaker of navigation itself. Of course, if the vehicle audio system is equipped with a line input terminal in a high-end or a modern model, it is possible to connect the audio output of the navigation to the line input terminal of the vehicle to output the speaker of the audio system in the vehicle. In a car, the audio system is not equipped with a line input terminal.

Therefore, when listening to music or listening to DMB broadcasting using the navigation device, the audio output is only heard through the speaker installed in the navigation device, so the quality of audio listening is poor.

On the other hand, even when the audio playback function is included in the navigation device has a disadvantage that can not be used as a karaoke function. This means that the navigation device will not accept microphone input. Therefore, if a karaoke solution is installed in the current popular navigation equipment, the karaoke function is only to listen to the accompaniment, and there is no way to input the voice that sings.

In order to solve the above problems, the present invention has devised a multi-function microphone that can be used in a car karaoke system. In particular, the present invention is to provide a microphone device for a karaoke function for a vehicle that can be easily implemented in combination with a navigation equipment that is mounted in a vehicle these days.

Due to the characteristics of the vehicle, howling is generated because it is a narrow closed space. To solve this problem, we want to use a directional microphone instead of a general omnidirectional microphone.

In addition, if the navigation equipment is equipped with a karaoke solution, the karaoke function is only to listen to the accompaniment, there is no way to enter the voice you sing. In order to overcome this inconvenience, the audio accompaniment output from the navigation device or other audio equipment is accepted as the microphone input, and the human voice is accepted as the microphone input to construct a microphone for synthesizing two audio sounds. This mixing function is a very convenient function that is not present in the microphone currently on the market.

In addition, the present invention can be configured to eliminate the microphone function and use only the FMT function. Connect the output terminal of mobile audio equipment (PMP, MP3Player, navigation, etc.) that user has to the line input terminal of the microphone, turn off the microphone function and turn on the FMT function, and use the FMT to input the FM audio of the vehicle. It can be configured to listen to music through the speaker of the vehicle to receive.

Many older cars do not have line inputs in their audio equipment. Therefore, in many cases, the audio input is received using a carpec and the music is played using a cassette tape reproducing apparatus. In this case, there is an inconvenience that the sound quality of the music must be connected by wire. Rather than listening to music using a radio receiver wirelessly using FMT, it is more convenient to listen to quality music. All these functions can be implemented using the multifunctional microphone configured in the present invention.

In addition, the present invention is configured to replace the remote control that is used in navigation by adding a wireless remote control function to the microphone function. By implementing a microphone function and a remote controller function simultaneously using a single CPU, the cost of the product can be lowered and the user's convenience is increased.

The multifunction microphone device according to the present invention is implemented by integrating various functions as follows.

1) Wired / wireless microphone function: Microphone's original function (Eco ON / OFF function), 2) FMT (FM Transmitter) function: To make accompaniment sound and general music only by car FM radio Function, 3) Karaoke Microphone Function: These are functions that mix voice and accompaniment sound and output them (wired and wireless output). In order to set these functions, the control switch is configured to be set by the user for each module. 4) The remote control function has been added to enable the wireless remote control function to set the required destination, movement path, etc. in the navigation.

Multifunctional microphone device for a vehicle karaoke function according to the present invention for achieving the above object,

A microphone input unit configured to control howling and echo, respectively, by a user's selection of a voice signal input from the microphone and select microphone input on / off;

A line input unit which receives an audio signal of an external device through an external line input terminal and performs a voice signal removing function by a user selection;

A mixer unit for mixing a voice signal of the microphone input unit and an audio signal of the line input unit;

An FM transmitter for modulating an output signal of the mixer into an FM signal and wirelessly transmitting the vehicle FM radio signal;

A line output unit for outputting the output signal of the mixer to the outside through a line output terminal;

A howling removal on / off switch of the microphone input unit, an echo on / off switch, a microphone on / off switch, an audio eliminator on / off switch of the line input unit, an FMT on / off switch and a microphone volume switch of the FM transmitter; Switches including an echo control switch and an FMT frequency selection switch of the FM transmitter;

It is achieved by configuring a multifunctional microphone device for a karaoke function for a vehicle, including a control unit for controlling the function of each unit based on the operation signal of the switches.

In addition, the present invention is achieved by configuring a multi-function microphone device integrated with a navigation remote control by further comprising a remote control keypad and a remote control wireless transmitter of the vehicle navigation device in the multi-function microphone device so that the control unit of the microphone device can also function as a remote control transmission. .

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

1 is a block diagram of a vehicle navigation remote control integrated multi-function microphone device according to the present invention.

As shown in the drawing, the audio signal input from the microphone 11 is input, and the microphone input unit 10 including the howling cancellation and echo control function, and the audio signal of the external device through the external line input terminal 21. FM input line input unit 20, the mixer unit 30 for mixing the audio signal of the microphone input unit 10 and the audio signal of the line input unit 20, and the output signal of the mixer unit 30 An FM transmitter 50 for modulating the signal and wirelessly transmitting the vehicle FM radio signal, a line output unit 60 for outputting the output signal of the mixer 30 to the outside through a line output terminal 61; Howling removal on / off switch, echo on / off switch, microphone on / off switch of the microphone input unit 10, voice remover on / off switch of the line input unit, FMT on / off switch of the FM transmitter and microphone volume Switch and echo control And the FMT frequency selection switch of the FM transmitter, the remote control keypad 70 of the vehicle navigation apparatus (not shown), the remote control wireless transmitter 80 that transmits the keypad signal to the navigation apparatus as an infrared signal, and The controller 40 controls the functions of the respective parts of the microphone based on the operation signals of the switches and controls the remote controller wireless transmitter 80 based on the signal of the keypad 70.

The present invention configured as described above is divided into two broadly, a wireless remote control function and a microphone function for navigation. Wireless remote control function is composed of a remote control keypad 70, the control unit 40 and the remote control wireless transmitter (80). The microphone function includes a microphone input unit 10, a line input unit 20, a mixer unit 30, an FM transmitter 50 and a line output unit 60. The detailed blocks of the microphone function are all configured to follow the control of the control signal of the controller 40.

First, in the present invention, the directional microphone 11 is applied according to the characteristic of the vehicle microphone. 2 is a directional characteristic diagram of a microphone for explaining the characteristic of the unidirectional microphone applied to the present invention. If the characteristics of the microphone are classified according to the directional characteristics, omnidirectional (Fig. 2 (a)), bidirectional (Fig. 2 (b)), Unidirectional (Fig. 2 (c)) Can be divided into Fig. 2 shows the directivity when the sound is collected by dividing 0 °, 90 °, and 180 ° with the microphone axis as the center of the graph meeting the directivity characteristic at 0 degrees.

The sound is a minute air pressure vibration of the air. This change in pressure is transmitted evenly across the sound source. In contrast, when viewed from a point in space, the pressure change caused by sound is transmitted equally in any direction. This is called omnidirectional. Therefore, the pressure type microphone which picks up the sound pressure change is omnidirectional. On the other hand, the sound propagates at a speed heading in the direction of travel. In the progression of a constant direction in which sound waves travel, a phase difference proportional to the distance occurs. The concept of the phase difference between these two points is the velocity microphone. This microphone is a bidirectional microphone. The directivity of the microphone is basically composed of the pressure type and the speed type.

The microphone 11 used in the present invention adopts a method of diffracting a small sound from the back of a pressure microphone having one diaphragm to obtain a single directivity, and combines both characteristics of a pressure microphone and a speed microphone. Use a microphone that can achieve unidirectionality with one diaphragm.

3 is a detailed configuration diagram of a multifunction microphone for a vehicle navigation remote control integrated karaoke system according to the present invention, Figure 4 is a configuration diagram of the microphone input unit of the multifunction microphone device according to the present invention.

As shown in the drawing, the amplifier 12 amplifies the input signal of the microphone 11 and the microphone signal amplified by the amplifier 12 is received to remove the howling under the control of the controller 40. An echo control unit 14 for receiving an output of a howling remover 13, an output signal of the howling remover 13, or an output signal of the amplifier 12, and performing echo control under control of the controller 40; The microphone volume control switch 15 for adjusting the microphone volume of the amplifier 12 and the output signal of the amplifier 12 are input to the howling remover 13 or the howling remover 13 is input. Inputs a howling elimination on / off switch 16 for bypassing to the next stage without passing through the output signal of the howling eliminator 13 or a microphone signal which is bypassed and input through the howling elimination on / off switch 16. The echo control unit 14 An echo on / off switch 17 for inputting or bypassing, an echo intensity control switch 18 for adjusting the echo intensity of the echo control unit 14, an output signal of the echo control unit 14, or the echo And a microphone on / off switch 19 for outputting or blocking a signal bypassed by the on / off switch 17 to the mixer unit 30.

In the microphone input unit 10 configured as described above, the microphone 11 is a portion that converts sound into an electrical signal. In the present invention, the directional microphone 11 is used to lower the howling. The amplifier 12 performs a function of adjusting the microphone volume. Using the microphone volume control switch 15 receives the volume control amount of the user performs an amplification function. The howling eliminator 13 functions to remove the howling (phenomena of '삑' sound) that is produced while the audio sound output to the speaker is amplified by being input to the microphone input again. The howling removal on / off switch 16 is a switch for turning on / off the function of the howling eliminator 13. The echo control unit 14 is a part for generating an echo in the voice output from the amplifier 12. When the user sets the echo intensity by using the echo intensity control switch 18, the user performs a function of generating an echo in the voice according to the set echo intensity. An echo on / off switch 17 is provided in front of the echo control unit 14 to turn on / off the echo function. The signal passing through the echo control unit 14 determines whether the microphone input / output switch 19 transmits the microphone input voice to the mixing unit 30.

The howling canceller 13 removes the signal component that goes out to the line output among the audio signal components output from the amplifier 12. Howling is a phenomenon in which when the microphone is placed close to the speaker, the speaker output signal enters the microphone input and is amplified, and this signal is output through the speaker. Say To reduce this phenomenon, the howling may be reduced by removing the audio signal component output from the speaker from the microphone input signal component. If implemented in software, it can be implemented by constructing an adaptive filter to filter out the signal components having a high correlation with the speaker output signal components from the microphone input signal components.

  10 is an example of a howling eliminator. The adaptive filter has a structure that continuously adjusts the filter coefficient of the adaptive filter so that the error signal E is kept small. The algorithm for adjusting the filter coefficients may use the most popular Least Mean Square (LMS) algorithm. The microphone input signal is composed of the sum of the voice signal (S) + speaker feedback signal (N). As the input of the adaptive filter H, a signal N 'output to the speaker is applied. That is, the signal N 'output to the speaker may be applied to the output path of the mixer unit 30. The error signal E becomes the smallest when the adaptive filter output signal becomes similar to the speaker feedback signal N among the microphone input signals. The howling reduced signal S ′ output through the above process can obtain a signal with reduced speaker feedback signal components. The echo control unit creates a ringing effect by delaying the audio signal for a predetermined time and adding it to the original signal.

When the microphone on / off switch 19 is turned off, only the line input audio signal is output to the wired or wireless output. In other words, when using only the FMT function, set the microphone ON / OFF switch to OFF.

5 is a block diagram of a line input unit of the multifunction microphone according to the present invention.

A line input terminal 21 for receiving an audio signal of an external device and the audio signal input through the line input terminal 21 under the control of the controller 40 remove a voice signal and mix only the song accompaniment sound. Voice to be inputted to the mixer 30 by inputting or bypassing the voice remover 23 for outputting to the unit 30 and the line input terminal 21 to the voice remover 23. A remover on / off switch 22.

The line input unit 20 configured as described above is provided with a line input terminal 21 so as to receive a line input of an audio signal of an external device (for example, an MP3 player or an audio reproducing apparatus). It is connected to the voice signal canceller on / off switch 22. The voice signal remover on / off switch 22 determines whether or not the voice remover 23 is used. Voice remover 23 is a device for use when you want to remove the singer's voice and hear only the accompaniment in the normal song with the singer's voice.

The audio signal passing through the voice remover 23 is transmitted to the mixer unit 30. The audio signal passing through the voice remover 23 is transmitted to the mixer unit 30. Here, the voice remover 23 may be implemented as a filter configuration to filter a specific frequency band under the control of the control unit 40. The voice remover 23 is for removing only the voice of the mantissa from the analog signal, thereby forcibly removing the frequency of the corresponding region. Therefore, a lot of actual accompaniment sound is damaged and the voice may not be completely removed, but compared to the original playback audio, the speech part is eliminated or reduced and the accompaniment sound is the main.

 Another example of a voice canceller is that the singer's voice is usually mono, the same being recorded on the left and right components and the instrument's music is recorded differently on the left and right. Therefore, the most basic method of removing speech is to remove the audio by subtracting the right audio signal from the left audio signal among stereo signals.

 11 shows a voice removing device for removing a voice from a stereo general song. By subtracting the right input audio signal from the left input audio signal and adding the low frequency band audio signal to the signal from which the voice is removed, it has the advantage of reinforcing the sound of musical instruments in the low frequency band such as drum or bass sound. The low frequency filtered signal (cutoff frequency = 200 Hz) for reinforcing low frequency signals such as bass and drum is added and output.

6 is a configuration diagram of the FM transmitter of the multifunction microphone according to the present invention.

As shown in this, through the FMT on / off switch 51 and the FMT on / off switch 51 for selecting whether to receive the output signal of the mixer unit 30 and transmit it as an FM signal Selects an FM modulator 52 that FM modulates the audio signal to a frequency set by the control of the controller 40, and an FMT frequency to be modulated to transmit an arbitrary non-broadcasting FM frequency among vehicle radio broadcasting frequencies And an antenna matching unit 54 for FM radio transmission by matching the output signal of the FM modulator 52 to the antenna 55. FIG.

In the FM transmitter 50 of the present invention configured as described above, the audio signal output from the mixer 30 is applied to the FMT on / off switch 51. The FMT on / off switch 51 is a part for determining whether to deliver the mixed audio signal output from the mixer unit 30 to the FM transmitter. If you want to send output only by wire without using FMT, the FMT ON / OFF switch 51 may be turned OFF. The FM modulator 52 is an FM modulator for wirelessly outputting the input audio signal. The carrier frequency for FM modulation allows the user to select and set a frequency not currently used by the current station so that the existing FM radio receiver can be used to hear the microphone output without interference with the radio station. The FMT frequency selection switch 53 transmits the value selected by the user to the controller 40. The controller 40 recognizes the selected frequency value and controls the PLL of the FM modulator 52 to vary the frequency band used. The FM modulator 52 transmits a signal to the antenna matching unit 54 by performing FM modulation on a frequency channel selected by the user. The antenna matching unit 54 is responsible for optimally transmitting a signal to the 50 ohm antenna 55 which is an antenna. Since the FM signal transmitted using the antenna 55 is received using the FM radio of the vehicle, the user can hear the audio using the vehicle audio speaker.

7 is a block diagram of a vehicle navigation remote control function according to the present invention. As shown therein, a remote controller keypad 70 is provided for manipulating the navigation device, and the input signal of the remote controller keypad 70 is converted into a radio signal from the remote controller wireless transmitter 80 under the control of the controller 40. And modulate and transmit.

That is, the present invention is constructed in an integrated configuration by incorporating the multi-function microphone and the remote control of the navigation device in one housing and jointly controlled by one control unit. Compared to using a wireless microphone and a remote controller, it is integrated into one, so that it is easy to manage and additionally reduce costs.

As mentioned earlier, the functions of the multifunction microphone can be largely classified into four types. The driving method operating by function is described below.

1) Wired and wireless microphone function (eco function ON / OFF, howling removal ON / OFF possible)

When operating with a wired or wireless microphone function, if only the line input of an external device is removed from the line input terminal 21 in the block diagram of FIG. 3, the wired or wireless microphone function can be used. Here, the echo function can be turned on / off using the echo on / off switch 17, and the howling canceling function can also be turned on / off using the howling eliminator on / off switch 16. Since the mixer 30 has one input microphone, the mixer 30 directly transmits the signal to the line output terminal 61 and the FM transmitter 50 without any separate operation.

Therefore, when the input signal of the microphone 11 is input through the amplifier 12 and output to the line output terminal 61 as it is through the mixer 30, it is also possible to use a general PC micro.

The howling remover 13 reduces the howling by using a function of comparing a speaker output signal and a microphone input signal to remove a signal having a high correlation. The howling eliminator 13 may be implemented by hardware or software. In addition, there is a howling removal on / off switch 16 in front of the howling eliminator 13 to determine whether the howling eliminator 13 is operated.

2) FMT (FM Transmitter) Function: This function allows you to listen to the accompaniment sound and general music using the car FM radio.

When the signal output from the navigation, PMP, and MP3 player that the user is using is connected to the line input terminal 21 of the multifunction microphone of the present invention, and the microphone on / off switch 19 is turned off, the microphone is operated. Only the input line input signal through the FM transmitter 50 can hear the audio to the vehicle FM radio.

Here, the voice remover 23 is a module used when a song containing a general singer voice is received as a line input and only the accompaniment sound from which the singer voice is removed is heard. The function of the voice remover 23 may be implemented by hardware or software. There is also a voice remover on / off switch 22 to select whether to use the voice remover function.

3) Karaoke microphone function: A function that mixes the voice and accompaniment sound and outputs it (wired and wireless output available).

The karaoke microphone function is like a combination of the previous two functions. This is a case where all functions except the wireless remote control function are operated among the functions devised in the present invention.

The audio signal input through the microphone 11 and the external song accompaniment sound input through the line input terminal 21 are mixed by the mixer 30 and output through the FM transmitter 50 or the line output terminal 61. . Therefore, the FMT on / off switch 51 is turned on, the audio channel of the vehicle is matched with the channel, and the microphone 11 is operated while inputting accompaniment by operating an external audio device connected to the line input terminal 21. If you sing through the audio speakers of the car is mixed with the microphone voice and the accompaniment sound is output. That is, it can be used as a karaoke function. The function can be utilized by selectively operating the howling removal or echo function.

If the song input through the line input terminal 21 from the external device is not only an accompaniment sound but is a normal song in which a singer sings a song, the voice remover 23 is turned on to remove only the singer's voice. If performed, the mixer accompaniment sound is input to the mixer 30 and mixed with the microphone voice, so that the singer's voice can be used as a karaoke function even if the song file is not a music file produced for karaoke, but a general MP3 player song file. Will be.

Therefore, the karaoke system for a vehicle can be implemented by using the microphone device and the navigation device of the present invention. The karaoke solution is mounted on the navigation device to display lyrics data according to the vocal accompaniment sound, and the earphone output of the navigation device is connected to the line input terminal 21 to be mixed with the microphone signal and output to the audio speaker of the vehicle by FMT transmission. By doing so, it becomes possible to shape the karaoke system.

In order to implement a karaoke solution in a navigation device, a karaoke solution can be implemented by downloading karaoke accompaniment from a PC to a navigation device or using an external memory.

Particularly, in the present invention, since the line input unit 20 includes the voice remover 23, even if the song is not a normal accompaniment sound, the singer's voice is filtered to mix the song sung by the user through the microphone and the karaoke. You will be able to implement the functionality.

4) Wireless remote control function: The most common use of wireless remote control in the car is navigation. When implementing a karaoke system using navigation, a system is constructed by combining a multifunctional wireless microphone with the above three functions and a wireless remote control function.

The remote controller keypad 70 obtains key information pressed by the remote controller user. The control unit 40 accepts the selected key information. The controller 40 transmits sequence data corresponding to the input key information to the remote controller wireless transmitter 80. The remote control wireless transmitter 80 transmits the input sequence data to the navigation wireless receiver by an infrared method or an RF method. Through this process, the navigation system recognizes the key value selected by the user in the navigation device and analyzes the recognized data so that navigation operates properly.

8 is an exemplary view of the appearance of a multifunctional wireless microphone for a karaoke system for a vehicle according to the present invention. As shown in FIG. 8, the external appearance of only the remote control function and the karaoke microphone function is implemented.

The microphone 11 is mounted on the upper end of the wireless microphone, and a microphone power on / off switch 101 and an indicator LED are installed below the microphone 11. Although not shown in the other drawings, the microphone power on / off switch 101 is configured to use the power supply unit 90 as a battery power source and to turn on / off the output of the power supply unit 90. Then, the microphone volume control switch 15 is provided on one side, and the microphone on / off switch 19, the echo intensity control switch 18, and the echo on / off switch 17 are combined to form a microphone / lower. A complex configuration was made with the echo control setting switch 110. The current implementation is configured in four modes, but can be broken down into several levels. Four modes have been set up so that users can use it as simply as possible. Each stage operates from four modes: MIC ON + ECO 2 ON (strong), MIC ON + ECO 1 ON (weak), MIC ON + ECO OFF, and MIC OFF. The intensity of the echo is limited to two modes. In other words, it consists of two modes: strong and weak.

Similarly, the FMT on / off switch 51 and the FMT frequency selection switch 53 were also configured as a composite switch and were configured as the wireless microphone control setting switch 120. There are four modes to select FMT off, FMT on + CH1, FMT on + CH2, FMT on + CH3 from the bottom. Although it is possible to make many channels selectable, in the example sample, three FM channels can be set for the user's convenience.

The other side is provided with a howling eliminator on / off switch 16 and a voice eliminator on / off switch 22, respectively. That is, in the present invention, as shown in FIG. 8, the switch is configured as a composite switch, and the microphone on / off, the echo on / off, and the echo intensity control are configured as a four-stage composite switch, and the FMT on / off switch and FMT frequency 3-channel selector switch is composed of 4-stage composite switch.

Finally, the wireless microphone antenna line 55 may be a separate antenna for FM transmission, or the input / output audio line line may be used as it is.

9 shows a bottom view of the wireless microphone device of FIG. 8. It is composed of a battery insertion port 102 into which two AAA batteries can be inserted, a line input terminal 21 and a line output terminal 61 for use as a power source. The line input terminal 21 receives an audio signal output from an accompaniment sound or an external audio device. The line output terminal 61 is a terminal used to send the microphone output to the wire.

As described in detail above, the present invention has the effect of providing a multi-function microphone device that can be used to distinguish between the wired / wireless microphone function, FMT function, karaoke microphone function, wireless remote control function.

The present invention is made for use in automobiles, and because it is a closed narrow space, the probability of howling is high, and in order to overcome this, a directional microphone and a howling remover are employed, and the output unit also uses FM radio which is basically installed in the vehicle. By using the FMT to output music or to output the line so that you can listen to music by using the effect is suitable for vehicles.

Also, by mixing audio accompaniment output from navigation equipment or other audio equipment as microphone input, and accepting human voice as microphone input, it synthesizes two audio sounds and outputs these mixing functions. As there is no function, it provides a very convenient function to use the car karaoke function.

In addition, the present invention is configured to replace the remote control that is used in navigation by adding a wireless remote control function to the microphone function. By implementing a microphone function and a remote controller function simultaneously using a single CPU, the product cost can be lowered and user convenience is improved.

In addition, the present invention can remove the microphone function and use only the FMT function, thereby connecting the output terminal of the mobile audio device (PMP, MP3Player, navigation, etc.) that the user has to the line input terminal of the microphone and OFF and FMT function is turned on to receive the input audio signal to the FM radio of the vehicle using the FMT to listen to music through the speaker of the vehicle. Accordingly, even when the audio device of the vehicle does not have a line input terminal, it is possible to listen to music through the radio receiver by using the microphone of the present invention, so that it is possible to conveniently listen to high quality music.

Claims (8)

A microphone input unit 10 receiving a voice signal input from the microphone 11 and including a howling cancellation and an echo control function; A line input unit 20 having an external line input terminal 21 to receive an audio signal of an external device; A mixer unit 30 for mixing the audio signal of the microphone input unit 10 and the audio signal of the line input unit 20; An FM transmitter 50 for modulating the output signal of the mixer 30 into an FM signal and wirelessly transmitting the vehicle FM radio signal; A line output unit 60 for outputting the output signal of the mixer unit 30 to the outside through a line output terminal 61; A microphone input on / off switch of the microphone input unit 10, a switch for selecting howling cancellation and echo functions, a switch for controlling microphone volume, an FMT on / off switch of the FM transmitter, and an FMT of the FM transmitter; Switches including a frequency selection switch; And a control unit 40 for removing the howling of the microphone input unit 910, echo control, and frequency channel control of the FM transmitter based on the operation signals of the switches. The method of claim 1, wherein the microphone 11, A multifunctional microphone device for a karaoke function for a vehicle, characterized in that the unidirectional microphone. The method of claim 1, wherein the microphone input unit 10, An amplifier 12 for amplifying the input signal of the microphone 11; A howling remover 13 for receiving a microphone signal amplified by the amplifier 12 and removing the howling under the control of the controller 40; An echo control unit 14 which receives an output signal of the howling eliminator 13 or an output signal of the amplifying unit 12 and performs an echo control under the control of the control unit 40; A microphone volume control switch 15 for controlling the microphone volume of the amplifier 12; A howling removal on / off switch 16 for inputting the output signal of the amplifier 12 to the howling eliminator 13 or bypassing the howling eliminator 13 to the next stage; An echo on / off switch for inputting or bypassing an output signal of the howling eliminator 13 or a microphone signal that is bypassed through the howling elimination on / off switch 16 to the echo control unit 14 ( 17) and, An echo intensity control switch 18 for adjusting the echo intensity of the echo control unit 14 and an output signal of the echo control unit 14 or a signal bypassed by the echo on / off switch 17; 30. A multifunction microphone device for a karaoke function for a vehicle, characterized in that it comprises a microphone on / off switch 19 for outputting to or blocking the output. The multifunction microphone device of claim 3, wherein The microphone power on / off switch 101 and the indicator (LED) is further included, The microphone on / off switch 19, the echo intensity control switch 18, and the echo on / off switch 17 are embodied in combination with the microphone / eco control setting switch 110 so that the microphone ON + echo 2 ON (strongly) ), MIC ON + ECO 1 ON (weak), MIC ON + ECO OFF, MIC OFF, you can select a total of four modes of the multi-function microphone unit for the car karaoke function. The method of claim 1, wherein the line input unit 20, A line input terminal 21 for receiving an audio signal of an external device; A voice remover 23 for removing a voice signal from an audio signal input through the line input terminal 21 and outputting only a song accompaniment sound to the mixer 30 under the control of the controller 40; And a voice remover on / off switch 22 for inputting or inputting the input signal of the line input terminal 21 to the voice remover 23 directly to the mixer unit 30. Multifunctional microphone device for car karaoke function. The method of claim 1, wherein the FM transmitter 50, An FMT on / off switch 51 for selecting whether to receive the output signal of the mixer unit 30 and transmit it as an FM signal; An FM modulator 52 for FM modulating an audio signal input through the FMT on / off switch 51 to a frequency set by the control of the controller 40; An FMT frequency selection switch 53 for selecting an FMT frequency to be modulated for transmission to any FM frequency which is not broadcast among the vehicle radio broadcasting frequencies; Multi-function microphone device for a karaoke function for a vehicle, characterized in that it comprises an antenna matching unit 54 for FM radio transmission by matching the output signal of the FM modulator (52) to the antenna (55). The method of claim 6, wherein the FMT on / off switch 51 and the FMT frequency selection switch 53 are combined to provide a total of four modes of FMT off, FMT on + CH1, FMT on + CH2, and FMT on + CH3. Multifunctional microphone device for a karaoke function for a vehicle, characterized in that consisting of a selectable wireless microphone control setting switch 120. The method according to any one of claims 1 to 7, A keypad 70 for inputting a key signal for vehicle navigation remote control; When the control unit 40 receives the key signal of the keypad 70 and outputs the sequence data based on the sequence data further comprises a remote control wireless transmitter 80 for transmitting a remote control signal to the vehicle navigation apparatus based on the sequence data A multifunctional microphone device for a karaoke function for a vehicle, characterized in that the integrated multifunction microphone device.

Images