KR20020052506A - Two-way communication apparatus and method for sending and receiving voice and graphic data simultaneously via PSTN line - Google Patents

Abstract

PURPOSE: A communication terminals for simultaneously transmitting and receiving voice data and graphic data in two ways using a single telephone line and a method thereby are provided so that two terminals can communicate each other while always maintaining the screen of an identical content, when they give and take graphic data for communication. CONSTITUTION: A microcomputer detects an off-hook state through a loop current detector. If the off-hook state is detected, the microcomputer sets a modem to an SVD(Simultaneous Voice and Data) mode, and judges whether an SVD ring tone is supplied from the other party. If the SVD ring tone is supplied, the microcomputer sends a response command to the other party through the SVD modem. If correspondence is started between two modems, the microcomputer judges whether a preset time has lapsed. If the preset time hasn't lapsed yet, the microcomputer detects whether a 'connected' code is generated from the modem. If the connected code is detected, the microcomputer informs the user that the connection has been successfully made. Then the microcomputer judges whether an 'SVD communication end' icon is pushed or the terminal gets changed into an on-hook state. In case that the SVD communication end icon is pushed or the terminal gets changed into the on-hook state, the microcomputer resets the register of the modem so that a 'no carrier' code can be generated to the other party. Then the microcomputer ends the connection and stores graphic data in a memory.

Description

Two-way communication apparatus and method for sending and receiving voice and graphic data simultaneously via PSTN line}

The present invention relates to a communication terminal device and a method for simultaneously transmitting and receiving voice and graphic data in both directions using a single telephone line, and more particularly, to use a device called a modem to conveniently exchange voice and graphics between two terminals. When one of the two parties attempts to 'connect', it sends an SVD ringtone so that the other can automatically connect and communicate, and in order to terminate the connection, 'SVD (Simultaneous Voice and Data) 'No Carrier' code is generated on the other side to automatically return to the voice call mode.In addition, when one terminal is on-hook in the simultaneous mode, the code 'No Carrier' is sent to the other party. It invented to occur and automatically return to voice mode and then on-hook.

Recently, a new communication terminal has emerged by combining information technology and communication technology.

A personal digital assistant (PDA), known as a PDA (Persona Digital Assistant), is equipped with an LCD and a touch panel so that a plastic pen can input and store graphic information such as handwritten notes on the LCD.

In addition, with the development of communication technology, a modem that can simultaneously send and receive voice and data using a single telephone line has appeared. New communication terminals can be used to facilitate communication.

If the information terminal equipped with LCD and touch panel and voice-oriented telephone are integrated, and can be connected to the telephone line, it is difficult to express only words because it can make and receive voice calls between the terminals and simultaneously exchange data information such as graphics. Communicate will be very easy as you can send and receive by hand, drawing, formula, etc.

Therefore, the conventional PDA can be equipped with a modem to perform data communication, so it can be connected to a server to search the Internet and to send and receive e-mail. However, there has not yet been a method of performing graphic communication between PDAs. There is a problem that the voice function is not integrated.

On the other hand, in the case of a web phone or a screen phone, it is designed to perform functions such as web searching and e-mail transmission and reception by equipping LCD and telephone functions. However, since voice call and data communication are separately performed, only voice and data communication are used for data communication. Only can That is, conventional web phones or screens are not integrated to simultaneously exchange voice and graphic data.

In addition, Korean Patent Application No. 99-23995 (name: Receiving message transmission and reception apparatus using a notepad and a voice pad simultaneously) filed by the present applicant proposes a configuration and method that can exchange graphics between two terminals However, if you do not use the whiteboard sharing method, the contents may be inconsistent when executing the graphic command at the same time, and the method of accessing the SVD simultaneous mode in the voice mode is not clear. It was.

In particular, when one of the two parties applies for simultaneous mode, the other party is invented so that the response is automatically made and connected, and the process of changing to the voice mode after exchanging voice and graphics is quickly responded by manipulating the register of the modem. And more clearly indicated.

In this case as well, when the simultaneous mode is terminated on one side, the other side is also invented so that the connection is automatically terminated. The relationship between the modem and the DAA, the modem and the microcomputer, the handset and the modem is based on the related signals and commands. Represented by the specific connection, the invention of the Korean Patent Application No. 99-23995 is possible only if the manufacturer or model and version number is the same, that is, there is a problem that it is impossible to transmit and receive voice and message between the two at the same time.

In addition, Korean Patent Application No. 94-40634 (Dec. 31, 1994, filed “Voice and Image Transmission Device”) is a method implemented by AVD (Alternate Voice and Data) modem. As for the alternating (sequentially switching alternating) mode of the present invention, the apparatus of the present invention is not mentioned in the DAA section and has no signal relationship with the modulation and demodulation, and the method itself is also used as an alternating mode for SVD to be implemented. This is fundamentally different from the concurrent mode of.

The present invention has been made to solve such a conventional problem, when attempting to 'connect' at either one of the two parties in order to conveniently exchange voice and graphics between the two terminals using a modem to the SVD ringtone to the other party The other side will automatically connect and communicate with each other, and if one of the two parties attempts to terminate the 'SVD communication' to terminate the connection, the other side will receive the code 'No Carrier' and automatically If one terminal is on-hook in the simultaneous mode, 'No Carrier' code is generated to the other party, and it automatically returns to the voice mode and then on-hook. When a terminal participating in communication sends and receives graphic data for communication, It is an object of the present invention to provide an apparatus and method for simultaneously transmitting and receiving voice and graphic data in both directions using a single telephone line that can communicate while maintaining a screen.

The above object of the present invention is to incorporate a logic circuit for controlling various peripheral devices and at the same time have a configuration in which a control program is stored and operated in a memory, and also the data for LCD are stored, and the peripheral device LCD, touch through a predetermined control program. A microcomputer that sends and receives commands to control the panel and the modem, and processes and processes data; An LCD for displaying graphic data stored in a memory on the screen under the control of the microcomputer; A touch panel for detecting a location of the character or graphic through a styler, which is a plastic pen, and notifying the microcomputer of its location; A memory for storing a control program or the like for LCD data under the control of the microcomputer; A SimDaneous Voice and Data (SVD) modem for performing communication control such as connecting communication, sending and receiving voice and data according to a command sent from the microcomputer, and terminating the connection when communication is completed; A Data Access Arrangement (DAA) for performing an interface function of transmitting and receiving a signal when off-hook between a telephone network and a modem; A loop current detector which detects when a current flows through the telephone line due to the handset of the telephone and transmits it to the modem and the microcomputer; A circuit for changing two wires corresponding to the tip / ring of the telephone to four wires of input / output, the handset hybrid circuit for transmitting voice input / output signals to the modem; It is selectively turned on / off by the SVD control signal output from the modem so that the telephone is connected to the trunk line during voice call, and in the SVD mode, the relay switch is configured to connect the telephone to the modem. When you try to connect, the SVD ringtone is sent to the other party, and the other side is automatically connected.If you try to terminate the SVD communication by either party to terminate the connection, the code 'No Carrier' is generated on the other side. It can be achieved by automatically returning to the voice call mode, and when one terminal is on-hook in the simultaneous mode, a code of 'No Carrier' is generated to the other party to automatically return to the voice mode and then on-hook.

Therefore, it is possible to simultaneously transmit and receive voice and graphic data in both directions using one telephone line.

1 is a two-way connection state of the communication terminal to which the present invention is applied.

2 is a screen configuration diagram of a communication terminal according to the present invention.

3 is a block diagram of an apparatus of the present invention.

4 is a main flowchart for explaining the method of the present invention.

5 is a diagram illustrating an operation scenario of a time axis between two users and a terminal device when using the terminal device to which the present invention is applied.

Explanation of symbols on the main parts of the drawings

1: Microcomputer 2: LCD

3: Styler 4: Touch Panel

5: memory 6: SVD modem

7: DAA8: telephone

9: loop current detector 10: handset hybrid circuit

11: relay switch

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

1 is a diagram illustrating a two-way connection state diagram of a communication terminal to which the present invention is applied. Each of the present invention devices connected to one telephone is connected to each other through a trunk line.

2 is a screen configuration diagram of a communication terminal according to the present invention, which is configured to be used as an area representing a title on the top, and at the same time, an SVD in which an SVD communication connection or termination is repeated every time a touch is made at an intermediate position. The link icon is located and the graphic editing tool is located on the right side. In this case, you can use the whiteboard as the workspace except the title area and the editing tool area.

Figure 3 shows a block diagram of the device of the present invention.

According to this, a logic circuit for controlling various peripheral devices is built in, and a control program is stored and operated in a memory, and data for LCD is also stored. 4) and a microcomputer (1) for sending and receiving commands to control the modem (6) and processing and sending and receiving data;

An LCD (2) for displaying graphic data stored in the memory (5) on the screen under the control of the microcomputer (1);

A touch panel 4 which detects the position and informs the microcomputer 1 when the user draws a predetermined character or graphic through the styler 3 which is a plastic pen;

A memory (5) under the control of the microcomputer (1) for storing a predetermined control program or the like or for storing LCD data;

An SVD modem 6 for performing communication control, such as connecting a communication according to a command sent from the microcomputer 1, transmitting and receiving voice and data, and terminating the connection when communication is completed;

A DAA 7 installed between the telephone network and the modem 6 to perform an interface function of transmitting and receiving signals when off-hook;

A loop current detector 9 which detects when a current flows through the telephone line because the handset of the telephone 8 is lifted and transmits it to the modem 6 and the microcomputer 1;

A handset hybrid circuit (10) for converting two wires corresponding to the tip / ring of the telephone (8) into four wires of input / output for transmitting a voice input / output signal to the modem (6);

A relay which is selectively turned on / off by the SVD control signal output from the modem 6 to allow the telephone 8 to be connected to the trunk line during a voice call and the telephone 8 to be connected to the modem 6 in the SVD mode. It is characterized by consisting of a switch (11).

4 shows a main flowchart for explaining the method of the present invention.

According to this, the microcomputer 1 continuously detects whether it is in an off-hook state through the loop current detector 9;

Detecting whether the SVD ring tone signal is coming from the other party during the voice call through the telephone 8 connected to the bilateral terminal if the modem 6 is in the off-hook state as a result of the detection; ;

If the 'SVD ring tone' is detected as a result of the above detection, sending a 'response' command to respond to the request of the other party through the SVD modem 6 to start communication between the two modems;

Repeating the previous detection step until the 'SVD connection' icon is pressed if the 'SVD ring tone' is not detected as a result of the detection;

When the 'SVD connection' icon is pressed as a result of the detection, sending an 'SVD ring tone' command to the modem to send an SVD ring signal to the other party and starting communication between the two modems;

Detecting whether a predetermined time (for example, 15 seconds) has elapsed when communication between the two modems is started as described above;

Displaying on the screen that the connection has failed after a predetermined time elapses as a result of the detection, resetting the register of the modem, and returning to the initial off-hook state detection step;

Continuously detecting whether a 'connected' code has occurred in the modem when the detection result is within a predetermined time;

As a result of the above detection, if the 'Connected' code is generated within the modem within the designated time, the user is notified that the connection is successful, and then the voice and graphic are exchanged to detect whether the 'SVD communication termination' icon is pressed or the terminal is on-hook. Making a step;

As a result of the above detection, if the 'SVD communication end' icon is pressed or the terminal is changed to on-hook state, the modem register is reset so that the other party generates the 'No Carrier' code. Storing the memory in the memory and returning to the initial off-hook state detection step;

If the 'SVD communication end' icon is not pressed and the terminal is not on-hook as a result of the above detection, detecting whether the 'No Carrier' code has occurred and sending and receiving voice and graphic when the 'No Carrier' code has not occurred Returning to;

If the 'No Carrier' code occurs as a result of the detection above, the connection is terminated and the graphic data is stored in the memory and the step of returning to the initial off-hook state detection step; characterized in that consisting of.

At this time, the method of exchanging the voice and the graphic is described in detail in the patent application No. 2000-79877 (name: method of synchronizing the screen contents in the communication terminal having a graphic function), which is filed by the present applicant. Since these methods do not have a focus, the detailed description thereof is omitted in the present invention.

FIG. 5 is a diagram illustrating an operation scenario of a time axis between two users and a terminal device when using the terminal device to which the present invention is applied.

If described in detail the operation and effect of the device and method of the present invention consisting of such a configuration and steps.

First, the microcomputer 1 which performs the main control function of the present invention is a central processing unit, and also includes a logic circuit for controlling various peripheral devices. The memory is equipped with a program and operates and also stores data for LCD. Send and receive commands to control the LCD (2), the touch panel (4) and the modem (6) performs a function of processing and sending and receiving data.

In addition, the LCD 2 displays graphic data in the memory on the screen, and the touch panel 4 detects the position of the microcomputer 1 when the user writes or draws a character or graphic using a plastic pen on the screen. ) Function.

On the other hand, the memory 5 performs a function of storing a program or data for LCD, and the modem 6 communicates according to the command sent from the microcomputer 1 to the SVD modem which can simultaneously transmit and receive voice and data. It controls voice and data communication such as connecting, sending and receiving data, and terminating the connection when communication is completed.

The DAA 7 is an interface circuit between the telephone network and the modem so that when the microcomputer 1 receives an off-hook command, the DAA 7 can transmit and receive signals between the modem 6 and the telephone station, and the loop current detector 9 When the handset of the telephone 8 is picked up, current flows through the telephone line, and the modem 6 and the microcomputer 2 know whether the handset of the telephone is lifted (off-hook) or placed (on-hook) as a device for detecting the current. To help.

In addition, the handset hybrid circuit 10 is a circuit for changing two wires corresponding to the tip / ring of the telephone to four wires of input / output and transmits voice input / output signals to the modem 6.

In addition, the relay switch 11 is a switch controlled by the SVD control signal from the modem 6 so that the telephone 8 is connected to the trunk line during the voice call, and the telephone 8 is the handset hybrid circuit in the SVD mode. (10) performs a switch function to be connected to the modem (6).

On the other hand, the microcomputer (1) continues to detect whether the off-hook state through the loop current detector (9), when the user lifts the handset when the off-hook state generates a control signal to the modem (6) SVD Set to mode.

Then, when the voice call is made through the phone 8 connected to the two terminals, that is, when one person makes a voice call to each other and proceeds with each other, it is detected whether either of the voice calls attempts the simultaneous mode.

In case of attempting the simultaneous mode like this, when the other person attempts, 'SVD ring tone' signal comes.

As described above, when the other party attempts the simultaneous mode, due to the 'SVD ring tone' signal coming from the other party and the modem 6 detects the SVD ring signal, the microcomputer 1 sends a 'response' command to the modem 6 to send the modem. (6) Instructs the other party to send a communication signal to initiate communication, and then initiates communication between two modems, that is, communication with the other modem.

Of course, if the counterpart detects that the counterpart has not attempted, the terminal detects whether the "SVD connection" icon has been touched and attempted the simultaneous mode.

However, if the user touches the 'SVD connection' icon installed in the terminal, and determines that the simultaneous mode is attempted, the user sends an 'SVD ring tone' command to the modem 6 so that the other party receives the 'SVD ring tone'. Allow communication between modems to begin.

In this way, when communication between the two modems is started, the microcomputer 1 operates a timer built in itself to determine whether a predetermined time, for example, 15 seconds has elapsed.

As a result, if a predetermined time has elapsed, the communication has failed, so the display shows 'connection failure' on the LCD (2) screen, resets the register of the modem (6), returns to the beginning, and returns the on-hook state of the telephone (8). Will be detected.

However, if the timer has not elapsed for 15 seconds, it detects whether the code 'connected' has occurred in the modem 6.

In other words, if the communication is successful, the user is shown a successful message, and both parties exchange data such as voice and graphics at the same time.

Of course, if there is no 'connected' code that tells you the connection is complete, go to the loop to check if the specified time has elapsed.

While exchanging voice and graphics as described above, the microcomputer 1 continuously detects whether the 'SVD communication end' icon is operated or the terminal is changed to on-hook state in the terminal, and an 'SVD communication end' command is inputted, If the terminal is changed to the on-hook state, the register of the modem is reset to generate a 'No Carrier' signal to the other terminal, and the memory 5 stores the graphic data at that time and then proceeds to the initial stage.

On the other hand, if the 'SVD communication end' icon did not operate or the 'No Carrier' code was received in the terminal of the present invention as a result of the detection, the communication is terminated and the graphic data is stored in the memory 5. After saving, go to the initial off-hook state detection step as described above.

However, if the result of the above detection did not receive the 'No Carrier' code or did not receive the 'SVD communication end' command from the other party, go to the step of sending and receiving voice and graphics and continue the loop.

FIG. 5 illustrates an example of a scenario made in time between two users and a terminal device when the terminal device to which the present invention is applied is briefly described.

First, an example of this scenario is a flow chart of the operations shown in FIG. 4, in the order in which they occur on the time axis. First, one of the two users makes a call and calls the other. (1) detects the off-hook and sets the modem 6 to SVD mode.

Then, when both terminals are connected, both parties can make a voice call.

In this way, if one attempts to connect the SVD while the voice call is being made, the modem 6 under the control of the microcomputer 1 generates an SVD ring tone and sends it to the other party.

At this time, if the present invention device of the other party detects this and sends a response, communication between the two invention devices is made. If the communication is successful, the user is notified of this.

Thus, the two parties can exchange data such as voice and graphics.

Then, if one attempts to terminate SVD, the register of modem 6 in the invention device is reset to generate the 'No Carrier' code of the modem in the device of the other party, and immediately resets the register of the modem. do.

After the modems of both terminal devices are reset, both ends the connection and saves the graphic data. The device returns to the voice call mode.

On the other hand, if the telephone is still held in the above state, it is recognized as off-hook, and the modem is set to the SVD mode, and if the telephone is in the on-hook mode, the standby mode is entered.

Therefore, the terminal device of the present invention can exchange voice and graphic data after the voice call, and if desired, return to the voice mode again to make and receive voice and graphics.

As described above, according to the present invention, in order to conveniently exchange voice and graphics between two terminals using a modem, when one of the two parties attempts to 'connect', the other side is automatically connected by receiving an SVD ring tone. You can communicate by exchanging voice and graphic, and if you try to terminate 'SVD communication' by either party to terminate the connection, 'No Carrier' code will be generated on the other side and you will return to voice call mode automatically. In addition, when one terminal is on-hook in the simultaneous mode, 'No Carrier' code is generated to the other party, and it automatically returns to the voice mode, and on-hook enables simultaneous voice and graphic data communication in both directions using one telephone line. It is.

Claims (2)

At the same time, a logic circuit for controlling various peripherals is built in. At the same time, a control program is stored and operated in the memory, and the data for LCD is also stored. A microcomputer 1 for exchanging commands to control the modem 6 and processing and exchanging data; An LCD (2) for displaying graphic data stored in the memory (5) on the screen under the control of the microcomputer (1); A touch panel 4 which detects the position and informs the microcomputer 1 when the user draws a predetermined character or graphic through the styler 3 which is a plastic pen; A memory (5) under the control of the microcomputer (1) for storing a predetermined control program or the like or for storing LCD data; An SVD modem 6 for performing communication control, such as connecting a communication according to a command sent from the microcomputer 1, transmitting and receiving voice and data, and terminating the connection when communication is completed; A DAA 7 installed between the telephone network and the modem 6 to perform an interface function of transmitting and receiving signals when off-hook; A loop current detector 9 which detects when a current flows through the telephone line because the handset of the telephone 8 is lifted and transmits it to the modem 6 and the microcomputer 1; A handset hybrid circuit (10) for converting two wires corresponding to the tip / ring of the telephone (8) into four wires of input / output for transmitting a voice input / output signal to the modem (6); A relay which is selectively turned on / off by the SVD control signal output from the modem 6 to allow the telephone 8 to be connected to the trunk line during a voice call and the telephone 8 to be connected to the modem 6 in the SVD mode. Simultaneous transmission and reception of voice and graphic data in both directions using one telephone line, characterized in that the switch 11 is configured. Continuously detecting whether the microcomputer 1 is in an off-hook state through the loop current detector 9; Detecting whether the SVD ring tone signal is coming from the other party during the voice call through the telephone 8 connected to the bilateral terminal if the modem 6 is in the off-hook state as a result of the detection; ; If the 'SVD ring tone' is detected as a result of the above detection, sending a 'response' command to respond to the request of the other party through the SVD modem 6 to start communication between the two modems; Repeating the previous detection step until the 'SVD connection' icon is pressed if the 'SVD ring tone' is not detected as a result of the detection; When the 'SVD connection' icon is pressed as a result of the detection, sending an 'SVD ring tone' command to the modem to send an SVD ring signal to the other party and starting communication between the two modems; Detecting whether a predetermined time (for example, 15 seconds) has elapsed when communication between the two modems is started as described above; Displaying on the screen that the connection has failed after a predetermined time elapses as a result of the detection, resetting the register of the modem, and returning to the initial off-hook state detection step; Continuously detecting whether a 'connected' code has occurred in the modem when the detection result is within a predetermined time; As a result of the above detection, if the 'Connected' code is generated within the modem within the designated time, the user is notified that the connection is successful, and then the voice and graphic are exchanged to detect whether the 'SVD communication termination' icon is pressed or the terminal is on-hook. Making a step; As a result of the above detection, if the 'SVD communication end' icon is pressed or the terminal is changed to on-hook state, the modem register is reset so that the other party generates the 'No Carrier' code. Storing the memory in the memory and returning to the initial off-hook state detection step; If the 'SVD communication end' icon is not pressed and the terminal is not on-hook as a result of the above detection, detecting whether the 'No Carrier' code has occurred and sending and receiving voice and graphic when the 'No Carrier' code has not occurred Returning to; If the 'No Carrier' code occurs as a result of the above detection, the connection is terminated and the graphic data is stored in the memory and the step of returning to the initial off-hook state detection step; characterized in that consisting of two telephone lines Voice and graphic data transmission and reception simultaneously.