KR20040023289A - Wireless Microphone System For Preventing Wrong-Work From Channel Mixture - Google Patents

Abstract

PURPOSE: A multichannel wireless microphone system for preventing a wrong operation due to channel cross is provided to prevent a wrong operation by the channel entanglement of more than 100 channel frequency bands so as to teach a plurality of classes at the same time. CONSTITUTION: In case that a plurality of users give lectures at their respective lecture rooms, a multichannel wireless microphone system for preventing a wrong operation due to channel cross is comprised of a plurality of transmitters(100-1-100-n), a plurality of receivers(200-1-200-n), a plurality of PCs(300-1-300-n), and a central control PC(400). The receivers(200-1-200-n) respectively receive voice signals from the transmitters(100-1-100-n) by wireless. The PCs(300-1-300-n) are connected with the receivers(200-1-200-n) respectively. The central control PC(400), connected with the PCs(300-1-300-n) through a local area network, controls the whole system.

Description

Multi-channel wireless microphone system for preventing malfunction due to channel crossover {Wireless Microphone System For Preventing Wrong-Work From Channel Mixture}

The present invention can select and use a desired channel from a plurality of channels in communication with the transmitter and the receiver of the wireless microphone, a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk that can monitor the operating status of the system in the center It is about.

The type of lessons currently being held in the superintendent of education takes the form of instructor-led training delivered to the trainee. This type of teaching method has been practiced for a long time, and it is giving a lot to the vocal cords from the point of view of the lecturer who conducts the lesson for a long time.

Educators who have to continue classes for hours every day often complain of pain in the vocal cords, and if left unattended for a long time, their original voice may be lost.

Recently, in order to solve this problem, various types of wireless microphone systems have been utilized in the education center, but the above systems have not been able to bring great efficiency to the system that does not consider the special situation of school.

The most common wireless microphone systems are single channels, two channels, four channels, and ten channels. Others include expensive broadcasting equipment that can use 60 to 70 channels.

A typical 10-channel wireless microphone system takes the form of not considering the special environment of school. The number of classes in a school is 60 classes for elementary school, 30 classes for middle school, and 30 for each middle school. Especially in elementary school, there are about 70 to 80 classes in addition to the basic 60 classes.

In the case of using a wireless microphone system having 10 or less channels in an elementary school having a class number of 60 or more as described above, there are six or more same frequencies, resulting in crosstalk and incapable of properly delivering classes.

In addition, the basic configuration of the conventional wireless microphone system is divided into a transmitter and a receiver so that each device can communicate when the frequencies match each other. In systems with four channels or less, the transmitter and receiver have fixed frequencies. When the educator of a lecture moves from place to place, there is a hassle of moving a transmitter and a receiver at the same time. In addition, devices that can switch channels also have a problem in that the method of use is complicated, so that the operation of the device may not be facilitated without acquiring expert knowledge about the method of use.

In a special environment of a school where classes are conducted simultaneously, a function of controlling the entire transmitter and the receiver in the center is necessary. If centrally monitoring and managing the occurrence of confusion caused by user's carelessness, it is possible to pinpoint the point where the ID of the class is incorrectly assigned, and the prompt action is made so that the class can be smoothly progressed. will be. However, the wireless microphone system having the above function has not been commercialized yet, but the necessity has emerged in practical education field.

Furthermore, when using a device having multiple channels to reduce crosstalk, currently implemented multi-channel systems are composed of expensive broadcasting systems. In the case of a school that feels the need for such equipment, there is a problem in that the price of the equipment is difficult and difficult to use.

Accordingly, an aspect of the present invention is to provide a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk having a frequency band of 100 channels or more so that classes of a plurality of classes can be conducted at the same time.

Another technical problem to be solved by the present invention is to provide a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk, which can easily specify a desired channel as a simple key operation by avoiding conventional operation and expensive channel conversion method. There is.

Another technical problem to be solved by the present invention is to monitor the status of the receiver centrally when installing and using a plurality of receivers to prevent malfunction due to channel crosstalk, which can minimize usage errors that may occur in some cases. To provide a wireless microphone system.

1 is a block diagram of a transmitter of a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk according to the present invention.

2 is a detailed block diagram of a wireless transmitter according to the present invention.

3 is a receiver block diagram of a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk according to the present invention.

Figure 4 is a block diagram of a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk in accordance with the present invention

The multi-channel wireless microphone system for preventing malfunction due to channel cross-talk to achieve the technical problem, relates to a microphone system having a plurality of channels, receives the user's voice and modulates the voice signal wirelessly and transmits it to the receiver A plurality of transmitters; A plurality of receivers for demodulating and outputting the wireless voice signals transmitted from the plurality of transmitters to the outside; A plurality of PCs connected to the plurality of receivers to check channel states of the receivers; And a central control computer that checks the channel state of each receiver connected to each of the plurality of PCs, and sets a channel of the receiver to a new channel when a malfunction occurs due to channel crosstalk.

In the present invention, the receiver and the transmitter are preferably provided with memory means for storing a channel used previously.

In the present invention, the malfunction of the receiver is characterized in that the channel of the two or more receivers of the plurality of receivers occur the same.

In the present invention, the central control computer is characterized in that when a predetermined receiver malfunctions due to channel cross talk, the video message or audio warning message data is transmitted to the PC for output.

In the present invention, the central control computer, when a predetermined receiver malfunctions due to channel crosstalk, transmits new channel data that changes the channel of the crosstalk receiver to the receiver through a PC to change the channel. Characterized in that.

Hereinafter, the present invention will be described in detail with reference to examples, and detailed description will be made with reference to the accompanying drawings to help understand the present invention. However, embodiments according to the present invention can be modified in many different forms, and the scope of the present invention should not be construed as being limited to the embodiments described below. Embodiments of the present invention are provided to more clearly and easily describe the present invention to those skilled in the art. In the drawings like reference numerals refer to like elements.

1 is a block diagram of a transmitter of a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk according to the present invention.

Referring to the transmitter according to the present invention with reference to Figure 1, the microphone (5) for absorbing the lecture voice of the user in the training room and converts it into a voice signal; A voice receiver 10 receiving a voice signal absorbed through the microphone 5; A signal amplifier 15 for amplifying the voice signal received by the voice receiver 10 to a level suitable for wireless transmission; A smoothing circuit unit 20 for filtering low frequency components at the frequency of the signal amplified by the signal amplifier 15; An automatic level adjusting unit 25 for reducing the occurrence of noise due to a transient response in the signal primarily amplified by the signal amplifier 15; A compression unit (30) for compressing the voice signal in order to transmit a relatively high signal with respect to noise generated in wireless communication; A wireless transmitter 35 for wirelessly transmitting the compressed signal; A central processing unit (45) for controlling the operations of all the above configurations; A display unit 55 composed of two segments for displaying a user-selected channel to the outside; A key input unit 60 having function keys of 10-digit UP / DOWN, 1-digit UP / DOWN, SET, and LOCK and allowing a user to select a channel by setting a desired ID up to “00 to 99”; It includes a memory unit 50 that stores the channel used previously.

The detailed configuration of the wireless transmitter is described below with reference to the block diagram of FIG. 2.

2 is a detailed block diagram of a wireless transmitter according to the present invention.

2, a frequency setting IC 40c for receiving frequency data corresponding to a channel selected by a user from the central processing unit 45 and setting an oscillation frequency; An oscillator 40d for generating an oscillation frequency according to the set frequency from the frequency setting IC 40c; A modulator 40b for mixing and modulating the oscillation frequency output from the oscillator 40d and the frequency output from the compression unit 30 and modulating the oscillation frequency into a signal suitable for wireless transmission; And a wireless signal transmitter 40a for wirelessly transmitting the voice signal modulated by the modulator 40b through the antenna 40.

In addition, the receiver of the multi-channel wireless microphone system for preventing malfunction due to channel crosstalk according to the present invention will be described with reference to FIG. 3.

3 is a receiver block diagram of a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk according to the present invention.

Referring to FIG. 3, a radio signal receiver 65 for receiving a radio signal output from the transmitter through an antenna 40; A demodulator 70 which decompresses and demodulates a radio signal received by the radio signal receiver 65 into an original audio signal; A filter unit 75 for filtering noise of the signal demodulated by the demodulator 70; A preamplifier 80 for adjusting the size and tone of the signal filtered by the filter unit 75; A muting unit 85 for blocking noise generated when a received signal does not exist and outputting a voice signal to the outside through the speaker 90 when the received signal exists; A central processing unit 45 for controlling the operation of all the components and connected to a PC for channel setting of the receiver; A key input unit 60 for selecting a channel; A display unit 55 configured to display two channels, each consisting of two segments; The memory unit 50 may store the currently selected channel ID.

When a plurality of transmitters, receivers, and PCs configured as described above are connected, a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk according to the present invention is implemented.

4 is a block diagram of a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk in accordance with the present invention.

Referring to FIG. 4, a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk according to the present invention includes a plurality of transmitters 100, that is, a transmitter 1 (100-100) when a plurality of users lecture at each training ground. 1), transmitter 2 (100-2), ..., transmitter n (100-n), and a plurality of receivers (200) for receiving voice signals wirelessly with the plurality of transmitters, i.e. Receiver 1 (200-1), receiver 2 (200-2), ..........., receiver n (200-n), a plurality of PCs (300) connected to the plurality of receivers, That is, PC1 (300-1), PC2 (300-2), ..........., PCn (300-n), the plurality of PCs 300 and the local area network (LAN) It includes a central control PC 400 for controlling the entire system.

Referring to the operation of the multi-channel wireless microphone system for preventing malfunction due to channel cross-talk according to the present invention having the above configuration as follows.

First, a case in which the system operates normally will be described. When the user inputs contents to be lectured through the microphone 5, the voice receiver 10 receives a voice signal. The signal amplifier 15 amplifies the received voice signal into a voice signal suitable for wireless transmission. The smoothing circuit unit 20 filters the low range of the amplified voice signal. The automatic level adjusting unit 25 removes noise of the voice signal from which the low pass is filtered. The compression unit 30 compresses to increase the transmission effect of the voice signal from which the noise is removed. The central processing unit 45 displays the previously used channel previously stored in the memory unit 50 through the display unit 55. The wireless transmitter 35 allows the compressed voice signal to be transmitted to the receiver 200 through the antenna 40 under the control of the central processor 45.

The voice signal of the user transmitted from the transmitter 100 is received by the radio signal receiver 65 through the antenna 40 of the receiver 200. The demodulator 70 demodulates the voice signal received by the wireless signal receiver 65 into the original voice signal. The filter unit 75 removes noise from the demodulated voice signal. The preamplifier 80 amplifies the size and tone of the voice signal filtered by the filter unit 75 into a signal suitable for outputting. The mute unit 85 blocks noise generated when no signal is generated and outputs an audio signal to the outside through the speaker 90 as it is when the signal is lost. The display unit 55 outputs the channel ID stored in the memory unit 50 from the central processing unit 45 through the segment, and the central processing unit 45 displays the current operating states of the transmitter 100 and the receiver 200 in the PC ( 300). The central control PC 400 checks the operation state transmitted from the PC 300 and checks whether a problem such as crosstalk with another transmitter 100 and the receiver 200 occurs in the current system.

And, if the system malfunctions will be described, it will be described on the assumption that 100 transmitters 100, the receiver 200 and the PC 300 in the current system is connected to the central control PC (400).

100 systems from transmitter 1 (100-1), receiver 1 (200-1), PC1 (300-1) to transmitter 100 (100-100), receiver 100 (200-100), PC100 (300-100) Connected to the central control PC 400, the channel ID is set to "00 ~ 99", respectively, the 100th transmitter 100 (100-100), the receiver 100 (200-100) and the PC100 (300) that the user intends to use. If -100 is using the channel " 99 " and is currently turned off, the central processing unit 45 of the transmitter 100 (100-100) and the receiver 100 (200-100) is turned off the moment the user turns on the power. Channel data is read from the memory unit 50 of the transmitter 100 (100-100) and the receiver 100 (200-100), and the channel ID "99" is displayed on each display unit 55. Then, the transmitter 99 (100-99), the receiver 99 (200-99), and the PC99 (300-99) using "99" as the current channel ID are the transmitter 100 (100-100) and the receiver 100 (200-100). ) And PC100 (300-100) because the same channel ID is used, noise due to crosstalk occurs. The central control PC 400 is the transmitter 99 (100-99), the receiver 99 (200-99) and the PC99 (300-99) and the transmitter 100 (100-100), the receiver 100 to eliminate the noise caused by crosstalk Receiving the channel data of the (200-100) and the PC100 (300-100) recognizes that the channel ID is overlapping with each other "99". The central control PC 400 changes the channel ID corresponding to the transmitter 100 (100-100), the receiver 100 (200-100), and the PC100 (300-100) from "99" to "00". Channel ID data corresponding to "and data indicating that the current operation is in a malfunction state are transmitted to the PC100 (300-100). Preferably, the data is a video message or an audio message. PC100 (300-100) receiving the data indicating that the malfunction state outputs a malfunction message through the monitor, or outputs a malfunction warning sound through the speaker 90 of the receiver 200. In addition, the PC100 (300-100) receiving the channel data corresponding to the channel ID "00" transmits the data to the central processing unit 45, and the central processing unit first controls the radio signal receiving unit 65 to change the channel. At the same time, the channel ID previously stored in the memory unit 50 is changed. The central processing unit 45 displays the changed channel ID on the display unit 55 so that the display unit 55 displays a channel "00". In addition, when the user recognizes that the channel ID of the receiver 200 is changed as the malfunction message or warning message, the user controls the key input unit 60 of the transmitter 100 to change the existing channel ID from "99" to "00". Change it. The central processing unit 45 receives the operation of the key input unit 60 to change the existing channel ID stored in the memory unit 50 from "99" to "00", and changes the channel ID "00" through the display unit 55. Change to In addition, the central processing unit 45 controls the radio transmitter 35 to change the channel from "99" to "00". If all the systems are changed in the above manner, it works normally.

Through all the above operations, in providing a multi-channel wireless microphone system for preventing malfunction due to channel crosstalk according to the present invention, it is possible to eliminate noise due to crosstalk that may occur during operation of each transmitter and receiver.

In the above described with reference to the accompanying drawings, preferred embodiments of the present invention in detail. However, embodiments of the present invention may be variously modified or applied by those skilled in the art, the scope of the technical idea according to the present invention should be determined by the claims below. will be.

According to an aspect of the present invention, by replacing the microphone system using a transmitter and a receiver having a fixed channel with a transmitter and a receiver capable of changing the channel, it provides a convenience to free the movement of the transmitter alone or the receiver only.

According to another aspect of the present invention, by monitoring the channel of each receiver in a centralized control mode, if the channels match, there is an effect that can prevent noise caused by crosstalk between the receiver by changing to another channel.

Claims (5)

A microphone system having a plurality of channels, A plurality of transmitters for receiving a user's voice and wirelessly modulating the voice signal and transmitting the voice signal to a receiver; A plurality of receivers for demodulating and outputting the wireless voice signals transmitted from the plurality of transmitters to the outside; A plurality of PCs connected to the plurality of receivers to check channel states of the receivers; And a central control computer for checking the channel state of each receiver connected to each of the plurality of PCs and setting the channel of the receiver to a new channel when a malfunction occurs due to channel crosstalk. Multi-channel wireless microphone system for preventing malfunctions caused by The method of claim 1, wherein the receiver and the transmitter, A multi-channel wireless microphone system for preventing malfunction caused by crosstalk of a channel, characterized by comprising memory means for storing a previously used channel. The method of claim 1, wherein the malfunction of the receiver, Multi-channel wireless microphone system for preventing malfunction due to channel crosstalk, characterized in that the same channel occurs in two or more of the plurality of receivers. According to claim 1, wherein the central control computer, The multi-channel wireless microphone system for preventing a malfunction caused by channel crosstalk, characterized in that when a predetermined receiver malfunctions due to channel crosstalk, the video message or voice warning message data is transmitted to a PC. According to claim 1, wherein the central control computer, When a certain receiver malfunctions due to channel crosstalk, new channel data that changes the channel of the crossovered receiver is transmitted to the receiver through a PC to change the channel. Multichannel wireless microphone system.