KR101000763B1 - Wireless conference terminal and system using binary CDMA - Google Patents

Abstract

The present invention relates to a wireless conferencing system that enables simultaneous transmission and reception of multi-party voice signals, and allows multiple people to simultaneously conference between separate terminals. Binary CDMA communication consisting of one master terminal and a plurality of slave terminals by combining each unit conference terminal composed of a microphone unit provided as an input of a binary CDMA communication module and a speaker unit for outputting a voice signal received from the binary CDMA communication module By implementing a network, a wireless conference system using an efficient binary CDMA configured to receive a voice signal from a microphone unit through a mounted binary CDMA communication module and output a received voice signal through a speaker unit.

Conference System, Binary CDMA, Microphone, Speaker, Conference Terminal

Description

Wireless conference terminal and system using binary CDMA

The present invention relates to a wireless conference system using binary CDMA, and more particularly, by a microphone unit and a binary CDMA module equipped with a binary CDMA communication module and the binary CDMA module to wirelessly transmit voices. The present invention relates to a wireless conference system using a binary CDMA communication module capable of conducting conferences according to multi-party voice transmission and reception regardless of a place including a speaker unit configured to receive the transmitted voice.

In general, the analog wireless microphone system is composed of a microphone, which is a transmitter of a typical 20MHz ~ 900MHz and a receiver that is a receiver, composed of a pair of transceivers of about 7 channels, and an additional device is an external mounting antenna. The earliest wireless microphones produced and used products from 20MHz to 800MHz, and were formed as fixed pairs that cannot change the channel. Up to 7 channels are available, and far enough frequencies are used to avoid interference with each other. If the same frequency is used in adjacent areas at the same time, it cannot be used due to interference, and a feedback phenomenon occurs. In addition, since the speaker microphone unit is wired, it is inconvenient to install and the cost is increased, and the performance changes from place to place due to noise and crosstalk, and it is necessary to be connected with additional devices such as a mixer or a controller. there was.

On the other hand, in recent years, a variety of short-range wireless communication methods have been researched and developed, for example, wireless LAN (Wi-Fi), Bluetooth (Bluetooth), ZigBee (binary ZigBee) binary CDMA technology has been developed. Comparing the respective technologies with respect to this, it is as described in Table 1 below.

division

Wi-Fi
Bluetooth
Zigbee
Binary CDMA
Modulation method

DSSS
FHSS
DSSS
FH / DS Hybrid
MAC

CSMA / CA
TDMA
CSMA / CA
TDMA
Bandwidth

22 Mbps
1 Mbps
5 Mbps
1 Mbps
frequency

2.4 GHz
2.4 GHz
2.4 GHz
2.4 GHz
Number of nodes

-
8
255
255
Transmission distance

~ 300m
~ 100m
~ 100m
~ 100m
Power consumption

~ 3.5W
~ 150 mW
~ 50 mW
~ 150 mW

In this regard, wireless LAN method (Wi-Fi) has a disadvantage that requires a large power for wireless transmission and reception, Bluetooth (Bluetooth) method has been developed as a low-power short-range wireless transmission and reception method for hands-free function in a mobile phone, recently Although it is being used, the sound quality is greatly reduced due to interference between users when the voice signal is transmitted, and the ZigBee method is suitable for remote control, but since the transmission speed is low, there is a problem that cannot be used to transmit the voice signal quickly and accurately. There were limitations for use in multiparty wireless conferencing systems.

Accordingly, the present invention provides a wireless conferencing system in which multiple people can simultaneously and simultaneously conference between multiple spaces by enabling the transmission and reception of a multilateral voice signal, and receiving and converting a voice to a binary CDMA communication module. Binary CDMA composed of one master device and a plurality of slave devices by combining each unit conference terminal comprising a microphone unit configured to transmit as an input and a speaker unit equipped with a binary CDMA communication module to enable transmission and reception of the voice signal. It is implemented as a communication network and provides a multi-party wireless conferencing system that can be installed at a low cost and ensure high audibility.

In order to achieve the above object, the present invention provides the following configuration.

The present invention provides a wireless conference terminal using binary CDMA, comprising: a binary CDMA communication module for connecting terminals; A microphone unit for providing a voice of a conference participant as an input of a binary CDMA communication module; A speaker unit for outputting a voice signal received from the binary CDMA communication module; Provided is a wireless conference terminal using binary CDMA.

In addition, a wireless conference system using binary CDMA, comprising: one master terminal; A plurality of slave terminals configured to be connected to the master terminal by binary CDMA; And a control device for controlling a connection between the master terminal and the plurality of slave terminals, wherein the master terminal and the plurality of slave terminals include a binary CDMA communication module for connecting the terminals, and a binary CDMA voice of a conference participant. It provides a wireless conference system using a binary CDMA, characterized in that the master terminal and the slave terminal consisting of a microphone unit provided as an input of the communication module, and a speaker unit for outputting the voice signal received from the binary CDMA communication module.

In this case, each of the plurality of slave terminals provides a wireless conference system using binary CDMA, characterized in that it comprises a voice request / release button for allocating a frame for voice signal transmission and reception so as to participate in the conversation.

In addition, the master terminal provides a wireless conference system using binary CDMA, characterized in that it comprises a talk release button for releasing a talk for the frame allocated by the slave terminal.

In addition, the slave terminal provides a wireless conferencing system using binary CDMA, characterized in that it comprises a plurality of LED (Light Emitting Diode) that can determine the presence or absence of the right to speak.

In this case, the talk release button of the master terminal and the LED (Light Emitting Diode) of the slave terminal are configured to correspond to the same number so that the corresponding talk release button and the LED has the same color, wireless using binary CDMA Provide a conferencing system.

Herein, the control device allocates the remaining frames other than the frame of the master terminal among the frames allocated to the entire system, and allocates the frames according to the time order of the talk right request of the slave terminal, and the slave terminal and the master terminal. Provided is a wireless conferencing system using binary CDMA, characterized in that the control device is configured to cancel the frame allocation according to the request for release of the voice.

The wireless conferencing system using binary CDMA provides a wireless conferencing system using binary CDMA, which enables simultaneous conversation through up to four terminals including the master terminal.

As described above, the wireless conferencing system using binary CDMA according to the present invention can wirelessly transmit an input of a microphone unit to the outside through binary CDMA communication, and the transmitted voice signal includes a binary CDMA communication module. A plurality of speaker units can receive and listen to up to four voices through the speaker unit.

In addition, the wireless conferencing system using the binary CDMA of the present invention can establish a conferencing system wirelessly regardless of the place in the range capable of binary CDMA communication, it is easy to install and secure high audibility at low cost It can be effective.

In order to achieve the above object, the present invention provides a wireless conference system in which a unit conference terminal capable of transmitting and receiving a voice signal and a unit conference terminal are implemented by mounting a binary CDMA communication module.

In the wireless conference system using the binary CDMA of the present invention, the binary CDMA used as a communication module for voice transmission and reception is a technique of modulating a multilevel transmission signal waveform into a binary waveform and has the following characteristics.

Binary CDMA technology is a technology that can simplify the system and components by converting the CDMA transmission signal to a binary (transition). The wireless access technologies of industrial digital devices that are being released or developed so far have various problems depending on the characteristics of each system such as interference problems in congested operating areas, many signal path setting problems, voice signal path support problems, power consumption problems, and price. As it exists, the binary CDMA technology used in the present invention is a technology using a combination of the advantages of CDMA and TDMA in order to solve all of these problems, in particular, by converting the multi-level signals appearing in the Multicode CDMA to phase information Because it transmits waveforms, it is a unique technique that solves the problems mentioned above. In addition, since the multilevel signal is modulated and transmitted as a binary waveform, the RF circuit is simple, the sampling rate is low, and the synchronization circuit can be easily implemented. Since the signal level input to the power amplifier is fixed, the efficiency of the amplifier can be increased. In addition, since the transmission signal is transmitted by spreading the code, it is possible to alleviate the problem of mutual interference due to TDMA characteristics while maintaining similar performance as DS / CDMA. In addition, the topology of the simultaneous multiple access is a multipont-to-multipoint technology that enables a variety of networking compared to the existing point-to-multipoint system.

The present invention provides a wireless conference system using binary CDMA consisting of a single master terminal 1 and a plurality of slave terminals 2 corresponding to a chairman by incorporating a binary CDMA communication technology having such an advantage into a wireless conference system. Provided is a wireless conferencing system capable of effectively conducting a conference by a control device that gives a voice to a plurality of slave terminals 2.

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

1 is a schematic configuration diagram of a unit conference terminal equipped with a binary CDMA communication module according to the present invention, and FIG. 2 is a separate configuration diagram of a unit conference terminal equipped with a binary CDMA communication module according to the present invention.

1 and 2, a wireless conference terminal using binary CDMA of the present invention includes a microphone unit 10 and a speaker unit, and the microphone unit 10 and the speaker unit 20 are binary CDMA communication. The module 30 is connected to enable transmission and reception of voice signals. That is, the microphone unit 10 receives a voice of a conference participant and provides it as an input of a binary CDMA communication module 30, and provides a voice signal received by networking of each binary CDMA communication module 30 to the speaker unit. And outputs via 20.

The speaker unit 20 is connected to the microphone unit 10 and includes a speaker 21 for outputting a received voice signal by mounting a binary CDMA communication module 30, the master terminal 1 and the slave Each terminal 2 includes a button for requesting / cancelling a voice. That is, in the case of the slave terminal 2, a talk right request / release button 23 is installed to request the chairman to speak while the conference is in progress, and release his / her own talk right after the talk. In the case of the master terminal 1, A talk release button 22 is provided which can release the talk right granted to the slave terminal 2.

The utterance request / release button 23 installed in each slave terminal 2 performs a utterance right request function when the utterance right is not held, and performs a utterance right release function when the utter right is held. In addition, the speaking right of each slave terminal 2 is implemented in a manner of assigning a speaking right by allocating a corresponding network frame in the order of time when the speaking right request button is pressed.

In addition, the uttering right release button 22 installed in the master terminal 1 performs a function of releasing the uttering right by pressing a button corresponding to the uttering right given to each of the slave terminals 2.

At this time, the talk release button 22 is the maximum number of slave terminals (2) that can be given at the same time (that is, the chairman master terminal proceeds to the meeting at the maximum number of frames that can be simultaneously assigned in the wireless conference system ( The number is same as 1) except for 1).

In addition, the microphone unit 10 is configured to include a light emitting diode (LED) 11 so that it is easy to determine whether to give or not to speak each slave terminal 2. Preferably, the LED 11 is set to be equal to the number of the talk release button 22 of the master terminal 1, each LED 11 is configured to have a different color, as well as the corresponding talk right It is configured to be the same as the color of the release button 22, so that the chairman, if necessary, by pressing the button for the corresponding color, it is configured to easily release the right to speak to the slave terminal (2).

FIG. 3 shows a schematic configuration of a wireless conferencing system using binary CDMA of the present invention. In the present invention, as shown in FIG. 3, a plurality of slave terminals 2 in one master terminal 1 are binary. It is connected via the CDMA communication module 30.

The wireless conference system using binary CDMA of the present invention uses binary CDMA technology, and up to 255 slave terminals 2 corresponding to 255 nodes can be connected to one master terminal 1. However, when the communication between the terminals at the same time, there is a problem that communication is not performed smoothly by interference, it is preferable to limit the number of terminals that can participate in the conversation at the same time.

According to the actual embodiment of the present invention, when up to four people simultaneously participate in the conversation, since the adverse effect of the interference can be minimized, the system is configured in four frames, so that the master terminal 1 can always participate in the conversation. It is configured to include a control device (not shown) implemented to allocate one frame so as to assign the other three frames to each slave terminal (2) according to the talk request time order. In this case, the control device is implemented to control the system according to the logic flow for the request and release of the voice as described above.

Therefore, as a preferred embodiment of the present invention, as shown in Figure 3, consisting of one master terminal 1 and eight slave terminals (2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h) In the system, if up to four terminals are implemented to enable conversation, the master terminal 1, the slave terminal 1 (2a), the slave terminal 2 (2b), and the slave terminal 3 (2c), each of which is assigned four frames, are simultaneously present. Conversation is possible.

While the invention has been described with reference to the preferred embodiments, those skilled in the art will appreciate that modifications and variations of the elements of the invention may be made without departing from the scope of the invention. In addition, many modifications may be made to particular circumstances or materials without departing from the essential scope of the invention. Therefore, the invention is not limited to the details of the preferred embodiments of the invention, but will include all embodiments within the scope of the appended claims.

1 is a schematic configuration diagram of a unit conference terminal equipped with a binary CDMA communication module according to the present invention.

2A and 2B are separate configuration diagrams of a unit conference terminal equipped with a binary CDMA communication module according to the present invention.

3 is a block diagram showing an embodiment of a wireless conferencing system using binary CDMA according to the present invention;

Claims (9)

delete In a wireless conference system using binary CDMA, One master terminal; A plurality of slave terminals configured to be connected to the master terminal through binary CDMA; As a control device for controlling the connection of the master terminal and the plurality of slave terminals, The master terminal and the plurality of slave terminals include a binary CDMA communication module for connecting the terminals, a microphone unit for providing a conference participant's voice as an input of the binary CDMA communication module, and a voice signal received from the binary CDMA communication module. It is made of a speaker unit for outputting, The master terminal includes at least one talk release button for releasing a talk right for a frame allocated by the slave terminal, and the slave terminal has at least one LED (Light Emitting Diode) for determining whether a talk right exists. , One or more LEDs (Light Emitting Diode) of the slave terminal is configured in the same number to correspond to the one or more utterance release button of the master terminal, the corresponding LED and the utterance release button is configured to have the same color. Wireless conference system using binary CDMA. The wireless conference system using binary CDMA according to claim 2, wherein each of the plurality of slave terminals includes a voice request / release button for allocating a frame for voice signal transmission and reception so as to participate in a conversation. delete delete delete The apparatus of claim 2, wherein the control device allocates the remaining frames other than the frame of the master terminal among the frames allocated to the entire system, and allocates the frames according to the time sequence of the request for the voice of the slave terminal. And a control device configured to cancel frame allocation in response to a request for releasing a talk right of the master terminal. 8. The wireless conference system using binary CDMA according to claim 7, wherein the wireless conference system using binary CDMA has an assignable frame on binary CDMA communication to enable simultaneous conversations through up to four terminals including the master terminal. Conference system. The wireless conference system using binary CDMA according to claim 8, wherein the number of light emitting diodes (LEDs) of the slave terminal and the voice release button of the master terminal is three.

Images