KR20060070863A - Communication terminal for displaying key correspondent with dtmf forwarding from another terminal with which is connected and method thereof - Google Patents

Abstract

The present invention relates to a communication terminal according to a push button dial method, and more particularly, to a communication terminal capable of displaying key information corresponding to a DTMF signal transmitted from another terminal in a call call connection.

The communication terminal according to an aspect of the present invention outputs a MIC-MUTE control signal to a voice input / output circuit when a DTMF mode setting key is input, and transmits DTMF mode setting notification information to another terminal in a call call connection. It is characterized by outputting.

According to this aspect, the communication terminal of the present invention can block any ambient noise signal transmitted through the microphone in addition to the DTMF signal to be transmitted. In addition, when the DTMF mode setting notification information is input, another terminal in the call call connection may be set to the DTMF display mode for displaying key information corresponding to the DTMF signal automatically received.

DTMF, Display, Communication Terminal, Mobile Phone, Push Button, Dial

Description

Communication terminal capable of displaying key information corresponding to DMF signal transmitted from another terminal connected to a call call, and a method for the communication terminal for displaying key correspondent with DTMF forwarding from another terminal with which is connected and Method

1 illustrates a conventional push button dialing scheme.

2 is a block diagram schematically illustrating a configuration of a communication terminal according to an embodiment of the present invention.

3 illustrates a process of processing a DTMF signal between communication terminals according to the present invention.

4 is a flowchart of processing a DTMF signal of a communication terminal according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal using a push button dial method, and more particularly, to a technology for enabling display of key information corresponding to a DTMF signal transmitted from another terminal that is in a call call connection.

Recently, with the development of electric and electronic communication technology, various wired or wireless terminals such as video telephones and mobile phones equipped with liquid crystal displays have been released. These various communication terminals typically follow a push button dialing scheme. Here, the push button dialing system generates a dial signal, that is, a dual frequency multi-frequency signal (DTMF) signal (hereinafter referred to as a DTMF signal) using two frequency combinations among seven kinds of voice band frequencies. It is sent to the exchange.

Hereinafter, a push button dial method will be described in detail with reference to FIG. 1.

1 illustrates a conventional push button dialing scheme. As shown, the conventional push button dialing scheme uses the high three frequency groups, 1209 kHz, 1336 kHz, 1477 kHz and the low four frequency groups, 697 kHz, 770 kHz, 852 kHz, 941 kHz in the voice band. As shown in Fig. 1, the conventional push button dialing method has two natural frequencies for each button (low frequency and high frequency). For example, when the terminal user presses the number '0', the terminal synthesizes the low frequency group 941 ㎐ and the high frequency group 1336 를 to make a DTMF signal of '0' and sends it to the exchange.

On the other hand, an image telephone or a mobile phone user equipped with a liquid crystal display may need to inform the counterpart of numeric information such as a phone number or bank account information during a call. In this case, the user typically informs the counterpart of the numeric information through voice. There is a inconvenience in that the voice call sensitivity is not good or the counterpart's pronunciation is not accurate so that the counterpart can not correctly listen to the numeric information. In addition, when the other terminal is a wireless mobile communication terminal, the radio wave transmission or reception sensitivity is inconvenient to be transmitted through a short message (SMS) after a call.

Accordingly, the present inventors have proposed a technique for displaying key information corresponding to a DTMF signal transmitted from another terminal in a call call connection in a communication terminal generally using a push button dial method.

The present invention has been proposed in the background as described above, and an object of the present invention is to provide a technique for displaying key information corresponding to a DTMF signal transmitted from another terminal in a communication call connection in a communication terminal.

It is another object of the present invention to provide a technique capable of preventing the output of any ambient noise signal in addition to the DTMF signal in the communication terminal.

It is still another object of the present invention to provide a technique for transmitting a DTMF signal as reliably as possible from a communication terminal to another terminal in a call connection.

According to an aspect of the present invention for achieving the above object, when DTMF mode setting notification information is input from another terminal in a call connection, first displaying key information corresponding to a DTMF signal input from another terminal. After the DTMF mode is set, when the DTMF signal is input from another terminal in the call connection, key information corresponding to the input DTMF signal is detected and displayed on the screen.

According to this aspect, the communication terminal user of the present invention can more conveniently provide numeric information such as a phone number or bank account information to the other party during a call.

According to another aspect of the present invention, a communication terminal outputs a MIC-MUTE control signal to a voice input / output circuit when a DTMF mode setting key is input, and transmits DTMF mode setting notification information to another terminal in a call call connection. It is characterized by outputting.

According to this aspect, the communication terminal of the present invention can block any ambient noise signal transmitted through the microphone in addition to the DTMF signal to be transmitted. In addition, when the DTMF mode setting notification information is input, another terminal in the call call connection may be set to the DTMF display mode for displaying key information corresponding to the DTMF signal automatically received.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

2 is a block diagram schematically illustrating a configuration of a communication terminal according to an embodiment of the present invention. Although the present embodiment illustrates a mobile communication terminal for forming a call call with another terminal through a wireless network including a base station, the present invention is not limited thereto and forms a call call with another terminal through a public telephone network (PSTN). It can be implemented as a video telephone equipped with a liquid crystal display device.

As shown, the mobile communication terminal according to the present invention comprises a phone control unit 27 and its subcircuits, which are largely common to existing mobile communication terminals.

The accessory circuits include a keypad 21, a memory unit 22, a display unit 23, a radio communication unit 24 for extracting voice and data signals from radio signals transmitted and received through the antenna 10, and the radio unit. A voice input / output processing circuit 25 for inputting and outputting a voice call signal from the communication unit 24 through the speaker 8 and the microphone 9, and a DTMF processing unit 26 are included.

The keypad 21 is implemented as a means for inputting a user's operation command, and may be a keypad, a side key, a touch panel, a handwriting input unit, a voice recognition unit, etc., which are composed of numeric keys and function keys.

The memory unit 22 stores an executable program and related data, and a single chip includes a static random access memory (SRAM) having a capacity of several megabits and a flash memory having a capacity of several tens of megabits. Can be implemented.

The display unit 23 displays a menu and an operating state. Preferably, the display unit 23 may be implemented by a liquid crystal display device.

The wireless communication unit 24 is configured to include an antenna and an RF circuit for communication with the base station, in the present specification, the wireless communication unit 24 is not only various versions of CDMA but also existing methods such as cellular, GSM, and W-CDMA methods. Of course, it will be interpreted to encompass mobile communication methods that will emerge in the future.

The voice input / output circuit 25 is a circuit for transmitting a received sign language voice to a user and receiving and converting the user's voice signal through a microphone, and converts digital voice data into an analog voice signal or vice versa. It is a well-known configuration including an additional circuit such as an audio amplification circuit or a filter.

The DTMF processor 26 receives the key information input through the keypad 21, generates a DTMF signal corresponding thereto, and outputs the DTMF signal to the voice input / output circuit 25. In one embodiment, the DTMF processing section 26 includes a commonly known DTMF transmission circuit that receives key information and generates and outputs a DTMF signal corresponding to the key.

According to a characteristic aspect of the present invention, the DTMF processing unit 26 detects and outputs key information corresponding to a DTMF signal input from another terminal that is in a call connection through the voice input / output processing circuit 25. (262) further. In one embodiment, the key detection processing unit 262 may be implemented as a conventionally known DTMF receiving circuit for receiving and processing a DTMF signal.

The baseband circuit of the wireless communication unit 24 and most of the circuits of the phone control unit 27 are commercially provided as a single integrated circuit. This integrated circuit, commonly referred to as an MSM chip, includes internally dedicated hardware for processing communications, a digital signal processor and a general purpose microprocessor. The phone control unit 27 includes a display control unit 272, a communication processing unit 274, and a key recognition unit 276.

The display control unit 272 controls the display unit 23 to display data from the key recognition unit 276 or the communication processing unit 274 on the screen.

The key recognition unit 276 outputs key information corresponding to the key input signal input from the keypad. The key recognition unit 276 is implemented as a microprocessor integrated with ROM, RAM, and a plurality of input / output ports, and processes a series of operations related to key press recognition.

The communication processing unit 274 controls voice and data communication in accordance with an execution program stored in the memory unit 22. According to a characteristic aspect of the present invention, the communication processing unit 274 controls the microphone mute to the voice input / output circuit 25 when the key information for setting the DTMF mode is input from the key recognition unit 276. And a DTMF mode processing unit 2742 for outputting a signal and outputting DTMF mode setting notification information to another terminal in the call call connection. According to this aspect, the mobile communication terminal of the present invention can block any ambient noise signal transmitted through the microphone in addition to the DTMF signal transmitted. In addition, when the DTMF mode setting notification information is input, another terminal in the call call connection may be set to the DTMF display mode for displaying key information corresponding to the DTMF signal automatically received.

In one embodiment, the DTMF mode processing unit 2742 further outputs a data transmission rate control signal to the wireless communication unit 24 according to the DTMF mode setting key information input from the key recognition unit 276. In one embodiment, the data rate control signal is to temporarily lower the data rate of the traffic channel, for example, to control 9.6kbps, which is the maximum rate of the current traffic channel data, to 4.8kbps. Accordingly, the terminal can reduce the disturbance of transmission by the surrounding electric field and can transmit the DTMF signal as stably as possible to other terminals in the call connection. In general, the mobile communication terminal controls the wireless communication unit 24 to increase the data transmission rate of the traffic channel as the number of voice call signals currently transmitted and received, and to decrease the data transmission rate of the traffic channel as the voice call signal is less, By applying this function even when setting the DTMF mode, the DTMF signal can be transmitted more stably.

According to a characteristic aspect of the present invention, the DTMF mode processing unit 2742 detects when the DTMF mode setting notification information is input from another terminal that is in a call connection through the wireless communication unit 24, the key detection processing unit 262 detects. The control signal and the detected key information are further output to the display control unit 272 so that the obtained key information is displayed on the display unit 23. Accordingly, the user of the communication terminal of the present invention can more conveniently provide numeric information such as a phone number or bank account information to the other party during a call.

In one embodiment, when the DTMF mode processing unit 2742 receives key information for storing the key information detected by the key detection processing unit 262 from the key recognition unit 276, the DTMF mode processing unit 2742 stores the detected key information in the memory unit. Save more on 22. Accordingly, the terminal can manage various numerical information obtained through the DTMF signal as a separate menu and can provide the user at any time.

In another embodiment, the DTMF mode processing unit 2742 may be configured to receive the DTMF mode release information from another terminal in the call connection through the wireless communication unit 24 to release the set DTMF mode. have. However, the communication terminal of the present invention is not limited to this, and the DTMF mode can be released by the key operation of the terminal user.

3 illustrates a process of processing a DTMF signal between communication terminals according to the present invention. In the present embodiment, it is assumed that the terminal to be called is called the calling terminal 20 and the terminal receiving the call is the called terminal 30. In addition, the calling terminal 20 and the called terminal 30 may form a call call with another terminal through a mobile communication terminal or a public telephone network (PSTN) that forms a call call with another terminal through a wireless network including a base station. It can be implemented as a video telephone with a liquid crystal display.

The calling terminal 20 and the called terminal 30 perform an operation of transmitting and receiving a voice call signal when a call is formed according to a general call processing protocol scheme with a wireless network including a base station (S301).

When the caller terminal 20 receives key information for setting the DTMF mode from the user during the call call connection with the called terminal 30, the calling terminal 20 performs the operation of setting the DTMF mode (S302). In one embodiment, the operation of setting the DTMF mode in the calling terminal 20 outputs a MIC-MUTE control signal to the voice input / output circuit 25 or sends a data transmission rate control signal to the wireless communication unit 24. It can be implemented as an output operation.

Thereafter, the originating terminal 20 generates DTMF mode setting notification information and outputs the DTMF mode setting notification information to the called terminal 30 in the call connection (S303). At this time, when the DTMF mode setting notification information is input, the called terminal 30 automatically performs an operation of setting a DTMF mode for displaying key information corresponding to the DTMF signal input from the calling terminal 20 (S304). . Thereafter, the calling terminal 20 generates a DTMF signal corresponding to the key signal input through the keypad 21 and outputs the DTMF signal to the called terminal 30 (S305 and S306).

Meanwhile, when the DTMF signal is input from the calling terminal 20, the called terminal 30 set to the DTMF mode detects key information corresponding to the DTMF signal input first (S307). Thereafter, the called terminal 30 displays the detected key information on the screen (S308), so that the called terminal user can easily check numeric information such as a phone number or bank account information sent by the calling terminal user. Subsequently, when the key information for releasing the DTMF mode is input, the called terminal 30 releases the set DTMF mode, generates DTMF mode release information, and outputs the DTMF mode to the calling terminal 20 which is in the call connection (S309, S310). ). Thereafter, the originating terminal 20 receiving the DTMF mode release information from the called terminal 30 automatically releases the DTMF mode (S311).

Hereinafter, the DTMF signal processing method executable in the communication terminal of the present invention will be described with reference to FIG. 4.

4 is a flowchart of processing a DTMF signal of a communication terminal according to an embodiment of the present invention. First, the terminal user presses the terminal telephone number for the voice call and then sends a call call connection request message to the wireless network including the base station. Thereafter, the terminal establishes a call call with another terminal according to a conventional call processing protocol scheme, and transmits and receives a voice call signal with the other terminal (S801). Thereafter, the terminal checks whether DTMF mode setting notification information is input from the other terminal during the call call connection with the other terminal (S802).

As a result of the check, if the DTMF mode setting notification information is not input from the other terminal, the terminal checks whether key information for setting the DTMF mode is input by the terminal user operation during the call call connection with the other terminal (S803). If the result of the check is negative, the terminal performs step S802 of confirming whether DTMF mode setting notification information has been input from another terminal when the system is not terminated. On the other hand, if key information for setting the DTMF mode is input by the terminal user operation, the terminal performs an operation for setting the DTMF mode (S804). In one embodiment, the operation of setting the DTMF mode in the terminal is an operation of outputting a MIC-MUTE control signal to the voice input / output circuit 25 or outputting a data transmission rate control signal to the wireless communication unit 24. Can be implemented. Subsequently, the terminal generates DTMF mode setting notification information and outputs the DTMF mode setting notification information to another terminal in the call call connection (S805). At this time, the other terminal receiving the DTMF mode setting notification information sets the DTMF mode for displaying key information corresponding to the DTMF signal input through the wireless network. Thereafter, the terminal generates a DTMF signal corresponding to the key signal input through the keypad 21 and outputs it to another terminal (S806). Thereafter, when the DTMF mode release information is input, the terminal releases the DTMF mode (S807 and S808). In one embodiment, the DTMF mode release information may be by a key operation of a terminal user, or may be DTMF mode release information received from another terminal in a call connection.

On the other hand, if the DTMF mode setting notification information is input from the other terminal as a result of the check in step S802, the terminal sets the DTMF mode for displaying key information corresponding to the DTMF signal input through the wireless network (S809). Subsequently, when the DTMF signal is input from another terminal in the call call connection, the terminal detects key information corresponding to the input DTMF signal (S810 and S811). Thereafter, the terminal displays the detected key information on the screen (S812). Thereafter, in one embodiment, when the key information for storing the detected key information is input, the terminal stores the detected key information in the memory unit 22, and releases the DTMF mode when the storing is completed (S813). . In an embodiment, the terminal may generate DTMF mode release information and output the DTMF mode release information to the terminal that is in the call.

Thereafter, the terminal checks whether a system termination signal has been input (S814), and as a result, performs a step S802 of checking whether DTMF mode setting notification information is input again from another terminal, and if it is positive, terminates the system.

As described above, the communication terminal according to the present invention is implemented to display the received DTMF signal on the screen, so that the user of the communication terminal can more conveniently provide numeric information such as a phone number or bank account information to the other party during a call. It has a useful effect. In addition, the communication terminal has a useful effect of eliminating the inconvenience that the user of the communication terminal to transmit through a short message (SMS) after the end of the call.

In addition, the communication terminal according to the present invention outputs a microphone mute (MIC-MUTE) control signal to the voice input / output circuit when the DTMF mode setting key is input, it is not known that any ambient noise signal is transmitted through the microphone in addition to the DTMF signal transmitted There is a useful effect that can be blocked.

In addition, the communication terminal according to the present invention by controlling the DTMF mode to temporarily lower the transmission rate of the traffic channel data when the setting key is input, to reduce the disturbance of transmission by the surrounding electric field to be as stable as possible to other terminals in the call connection There is a useful effect of transmitting DTMF signals.                     

Although the present invention has been described with reference to the accompanying drawings, it will be apparent to those skilled in the art that many various obvious modifications are possible without departing from the scope of the invention from this description. Therefore, it should be interpreted by the claims described to include many such variations.

Claims (12)

A communication terminal capable of transmitting and receiving DTMF signals with another terminal connected to a call call, the communication terminal comprising: A keypad; A display unit for displaying a menu and an operation state; A voice communication unit for transmitting and receiving a voice call signal; A voice input / output circuit for inputting and outputting a voice call signal from the voice communication unit through a microphone and a speaker; A memory unit for storing an execution program and related data; A communication processor for controlling a voice call according to an execution program stored in the memory unit, and a key recognition unit for outputting key information corresponding to a key input signal input from the keypad; A control unit including a display control unit for controlling the display unit to display data from the key recognition unit or the communication processing unit on a screen; A DTMF processing unit for receiving key information from the key recognition unit, generating a DTMF signal corresponding thereto, and outputting the DTMF signal to the voice input / output circuit; The communication processing unit: When the key information for setting the DTMF mode is input from the key recognition unit, a MIC-MUTE control signal is output to the voice input / output circuit, and DTMF mode setting notification information is output to another terminal in the call call connection. DTMF mode processing unit; Communication terminal comprising a. The method of claim 1, wherein the DTMF mode processing unit: And outputting a data transmission rate control signal to the voice communication unit in accordance with DTMF mode setting key information inputted from the key recognition unit. The method of claim 2, wherein the DTMF processing unit: A key detection processing unit for detecting and outputting key information corresponding to a DTMF signal input from another terminal connected to a call through the voice input / output circuit; More, The DTMF mode processing section: When DTMF mode setting notification information is input from another terminal that is in a call call connection through the voice communication unit, the display control unit transmits a control signal and detected key information to the display control unit so that the key information detected by the key detection processing unit is displayed on the display unit. Communication terminal characterized in that it further outputs. The method of claim 3, wherein the DTMF mode processing unit: And when key information for storing key information detected by the key detection processing unit is input from the key recognition unit, the detected key information is further stored in the memory unit. The method of claim 4, wherein the DTMF mode processing unit: And receiving DTMF mode release information from another terminal in the call call connection through the voice communication unit, and releasing the set DTMF mode. A mobile phone equipped with the communication terminal according to any one of claims 1 to 5. In the DTMF signal processing method that can be executed in a communication terminal capable of transmitting and receiving DTMF signals with another terminal that is connecting a call, the DTMF signal processing method includes: Setting the DTMF mode when key information for setting the DTMF mode is input; Generating DTMF mode setting notification information and outputting the DTMF mode setting notification information to another terminal in a call call connection; Generating a DTMF signal corresponding to an input key signal and outputting the DTMF signal to another terminal in a call call connection; DTMF signal processing method comprising a. 8. The method of claim 7, wherein setting the DTMF mode comprises: Outputting a MIC-MUTE control signal to a voice input / output circuit; DTMF signal processing method comprising a. 8. The method of claim 7, wherein setting the DTMF mode comprises: Outputting a data rate control signal to the voice communication unit; DTMF signal processing method further comprising. 10. The method according to any of claims 7 to 9, wherein the DTMF signal processing method is: Setting a DTMF mode when DTMF mode setting notification information is input from another terminal in the call call connection; Detecting key information corresponding to a DTMF signal input from another terminal connected to a call; Displaying the detected key information on a screen; DTMF signal processing method further comprising. The method of claim 10, wherein the DTMF signal processing method is: Storing the detected key information in a memory unit when key information for storing the detected key information is input; DTMF signal processing method further comprising. 12. The method of claim 11, wherein the DTMF signal processing method is: Releasing the set DTMF mode when DTMF mode release information is input; DTMF signal processing method further comprising.

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