KR20010059485A - Mobile telephone make possible hands free communication over ear-microphone by use radio receiver - Google Patents

Abstract

PURPOSE: A portable phone capable of hands-free communication through an ear-microphone using a car radio receiver is provided to make a hands-free call by using a radio receiver provided at a car audio. CONSTITUTION: An ear-microphone apparatus(200) has an FM transmission module for modulating a voice signal received from a portable phone to a predetermined frequency in a receiving bandwidth of a radio receiver and transmitting the same through an antenna when a phone call is made by connecting the plug(201) of the ear-microphone(200) to an ear-microphone jack(128). A control unit outputs a switching control signal to enable a hands-free all by the ear-microphone(200) by sensing the connection of the plug(201) to the ear-microphone jack(128). A switch unit selectively switches a voice path to make a portable phone call or ear-microphone call according to a switching control signal of the control unit.

Description

MOBILE TELEPHONE MAKE POSSIBLE HANDS FREE COMMUNICATION OVER EAR-MICROPHONE BY USE RADIO RECEIVER}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to portable telephones, and more particularly to mobile telephones for hands-free calls using a vehicle radio receiver.

Typically, mobile phones do not have the speakerphone function that is typically provided in landline phones. Accordingly, when a mobile phone user makes a phone call or receives and listens to various information, the mobile phone user must listen to the sign language directly with the speaker. Therefore, it was inconvenient to talk for a long time or talk while driving.

Thus, a typical mobile phone is capable of using handsfree function. Using the hands-free function, it is possible to listen to the contents of a call through a separate speaker provided in the hands-free device. However, in order to use the hands-free function, the hands-free device must be purchased and installed separately. Accordingly, in order to use the hands-free function, the user had to bear many economic burdens.

Accordingly, an object of the present invention is to provide a mobile phone capable of making hands-free calls using a radio receiver provided in car audio.

The present invention for achieving the above object is that the plug of the ear-microphone is connected to the ear microphone jack to the voice signal received from the mobile phone to the predetermined frequency in the reception band of the radio receiver through the antenna through the antenna An ear-microphone device including an FM transmitter module to transmit a signal, a control unit for detecting that the plug is connected to the ear-microphone jack, and outputting a switching control signal to enable a hands-free call to the ear-microphone jack; Characterized in that the mobile phone having a switch unit for selectively switching the call voice path so that the call to the mobile phone call or ear-microphone by the switching control signal.

1 is a schematic perspective view of a flip type portable wireless telephone connectable to an external earphone device according to an embodiment of the present invention;

Figure 2 is a block diagram showing a mobile phone and a radio receiver according to an embodiment of the present invention

3 is a control flowchart for conducting a call using a vehicle speaker according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted. It should be noted that the same elements in the drawings represent the same reference signs wherever possible.

1 is a schematic perspective view of a flip type portable wireless telephone connectable to an external earphone device according to an embodiment of the present invention.

Reference numeral 100 denotes a flip portable cordless telephone, 180 denotes a flip, and 128 denotes an ear microphone jack. Reference numeral 100 denotes an external ear-microphone device, and 201 denotes an external plug which is plugged into the ear microphone jack 128. 202 is an external microphone, 207 is an external speaker, 204 is an external button, and 205 is a button. The ear-microphone 200 is mounted on the mobile phone 100, and the microphone 201 is built in the ear-microphone 200, and an FM transmitting module (Rx) is provided at an audio receiving end Rx in the ear-microphone 200. 203 is connected. 206 is a second LCD connected to the external plug 201. The FM transmission module 202 has an antenna of a type used for a conventional FM wireless microphone.

2 is a block diagram showing a mobile phone and a radio receiver according to an embodiment of the present invention. In FIG. 2, the mobile phone 100 is configured to perform the speakerphone mode by the ear-microphone of the present invention by the control unit 102, and the radio receiver 128 may be, for example, a vehicle radio receiver.

1, the memory unit 104, the keypad 106, the display unit 108, the RF module 112, the baseband processor 114, and a coder-decoder (CODEC) 116 are illustrated in FIG. 1. And the control unit 102 connected to the RF transmission module 122 perform voice signals and data processing for a general telephone call or data communication and control each part of the mobile phone. As the control unit 102, when the cellular phone of Fig. 1 adopts the CDMA (Code Division Mutiple Access) method, for example, a Qualcomm MSM (Mobile System Mode) chip is used. The MSM chip includes a microprocessor, a CDMA processor, a vocoder, and the like. In the following description, the description of the processing and control of the control unit 102 for a conventional telephone call or data communication or various additional functions not directly related to the present invention will be omitted.

The memory unit 104 connected to the control unit 102 includes an electrically erasable and programmable ROM (EEPROM), a flash memory, a random access memory (RAM), and the like, to process and control the control unit 102. A program and various reference data are stored, and a working memory of the control unit 102 is provided. The keypad 106 includes various keys including numeric keys to provide the controller 102 with a key input input by a user. The LCD driver 108 drives the first LCD 130 and the second LCD 206 under the control of the controller 102. The first LCD 130 and the second LCD 206 display the state and operation process of the mobile phone under the control of the LCD driver 108.

Meanwhile, the switch unit 122 is connected to the amplifiers 124 and 126 by the control of the control unit 102, and the amplifiers 124 and 126 are connected to the ear-microphone jacks 128, respectively. When outputting to the external speaker 203 of the microphone 200, a predetermined amplification of the voice generated from the control unit 102 or a predetermined amplification of the voice input from the external microphone 202.

The controller 102 collectively controls the switching control, dialing, voice recognition, and overall operation of the voice path according to the connection or disconnection of the external ear-microphone device 200 and the flip type portable wireless telephone. In addition, the ear-microphone jack 128 connects the ports P1 and P2 for receiving the key signals of the scroll key 204 and the button 205 of the external ear-microphone device 200. In addition, the FM transmission module 203 modulates the voice signal input from the control unit 102 into an RF signal of a preset frequency in the reception band of the radio receiver and transmits it through the antenna 207. The FM transmission module 203 may use a conventional FM module, for example, the antenna 203 may be built in the ear-microphone 200.

Accordingly, the ear-microphone jack 128 connected to the external ear-microphone device 200 according to the present invention typically uses the ear-microphone jack provided in the portable wireless telephone, and in the present invention, a conventional jack Two ports for ear-microphone and microphone for forming the voice transmission and voice reception path by using five ports among the plurality of ports provided therein, one port for inputting the scroll key signal and the button input One port of, and one port of the second LCD display information transmission purpose, a total of five ports are formed. Correspondingly, the external plug 201 of the external ear-microphone device 200 may also have a pin connected to the external speaker 203, a pin connected to the microphone 202, and a pin connected to the scroll key 204. , A pin connected to the button 205, and a pin connected to the second LCD 206.

The RF module 112 transmits and receives an RF signal with the base station through the antenna 110. The RF module 112 converts the received RF signal into an intermediate frequency (IF) signal and outputs the signal to the baseband processor 114 and the baseband processor 114. IF signal inputted from) is converted into RF signal and transmitted.

The baseband processor 114 is a baseband analog ASIC (BBA) that provides an interface between the controller 102 and the RF module 112. The baseband processor 114 converts a baseband digital signal applied from the controller 102 into an analog IF signal. The signal is converted and applied to the RF module 112, and the analog IF signal applied from the RF module 112 is converted into a digital signal of the baseband and applied to the control unit 102. The codec 116 connected to the control unit 102 is connected to the microphone 118 and the speaker 120, and performs voice code modulation (PCM) encoding on the voice signal input from the microphone 118 to control the voice data. And outputs the voice signal to the speaker 120 by PCM decoding the voice data input from the control unit 102.

In the ear-microphone 200 as described above, the speakerphone mode of the present invention is typically added as an item of a user selectable menu or selected using a specific key on the button 205. do. The user can select or cancel the speakerphone mode by menu selection or key input.

3 is a control flowchart for conducting a call using a vehicle speaker according to an embodiment of the present invention.

The ear-microphone 200 is mounted on the ear-microphone jack 128, and then a button 205 is operated to output a voice signal according to a phone call to the RF transmission module 203 in the speakerphone mode to the vehicle radio receiver 300. An operation for transmitting to the speaker of will be described with reference to FIG.

In the present invention, the speakerphone mode refers to an operation mode for transmitting a voice signal according to a call at a frequency of a reception band of a radio receiver. When the speakerphone mode is set as described above, a number of people including the user can hear the contents of the call through the vehicle radio receiver 300 or the like.

First, the control unit 102 checks whether a phone call is made in step 200. The telephone call includes a user making a telephone call or listening to various kinds of information by the incoming or outgoing call using the mobile phone 100.

In step 401, the control unit 102 does not need a speakerphone function unless it is a phone call. Therefore, the control unit 102 returns to a normal processing routine. If the connection of the ear-microphone plug 201 is not detected, the process proceeds to step 403 to perform a call to the mobile phone 100. Here, the ear-microphone connection detection may be detected through, for example, the ports P1-P2. However, if the connection of the ear-microphone plug 201 is detected, the controller 102 proceeds to step 404 to control the switch unit 122 to output the received voice signal output from the codec 116 to the amplifier 124. . The audio signal output through the amplifier 124 is applied to the FM transmission module 203. At this time, the FM transmission module 203 modulates the received voice signal to the frequency of the radio reception band and propagates to the air through the antenna 207. Then, the voice signal according to the telephone call propagated through the antenna 207 can listen to the contents of the call through the speaker of the conventional radio receiver 300.

In this state, if the speakerphone mode is canceled by the user or the telephone call is terminated, the control unit 102 does not output the voice signal according to the telephone call to the FM transmitter module 203 any more in response to this in step 406. Return to the routine.

Therefore, it is possible to simply implement the speakerphone function by adding only the FM transmission module 203, so that a plurality of users can listen to the contents of the call together. In addition, the user can use a function similar to the hands-free function without using a separate hands-free device.

As described above, the present invention can simply implement the speakerphone function by adding only the FM transmission module in the ear-microphone, so that a function similar to the handsfree function can be used without using a separate handsfree device.

Claims (1)

A mobile phone capable of hands-free calling through an ear-microphone using a car radio receiver, The ear microphone includes an FM transmitter module connected to the ear microphone jack to modulate a voice signal received from the mobile phone to a preset frequency in a reception band of a radio receiver and transmit the antenna through a antenna when the phone is connected. Microphone unit, A control unit which detects that the plug is connected to the ear-microphone jack and outputs a switching control signal to enable a hands-free call to the ear-microphone, and calls the mobile phone call or the ear-microphone by the switching control signal of the control unit. A mobile phone capable of hands-free calling using an ear microphone, characterized in that configured as the mobile phone having a switch unit for selecting and switching a call voice path.