JP2002027089A - Mobile communication terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide mobile communication terminal equipment providing improved convenience in hands-free use. SOLUTION: Switching control can be separately performed by respectively connecting control signal lines (c) and (b) from a control part 17 by respectively independently operating changeover switches 54 and 55. A mode setting control means 17b is provided and in the state of mounting an earphone/microphone 100, one of two modes of 'loudspeaker mode' and 'earphone mode' can be selectively designated. In the loudspeaker mode, changeover switches 52, 53 and 55 are switched by a switch changeover control means 17a, an earphone/ microphone jack 51 is connected to a transmitting amplifier 13 and a receiving amplifier 10 is connected to a speaker amplifier 42 respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to, for example, PDC (Pe
The present invention relates to a mobile communication terminal device such as a mobile phone device, and more particularly to a mobile communication terminal device having a hands-free function for use in a vehicle.

[0002]

2. Description of the Related Art In recent years, traffic accidents due to the use of portable telephones while driving a car have been increasing. In response, last year, the Road Traffic Law was amended to require the use of in-vehicle hands-free devices when using mobile phones while driving. Against this background, demand for hands-free devices is increasing.

[0003] However, many in-vehicle hands-free devices are expensive at the present time, and genuine products may not be able to be used when a mobile phone is replaced, which imposes a heavy burden on the user.

Therefore, there has been provided a portable telephone device which easily realizes a hands-free function using an earphone microphone.

[0005] In this type of portable telephone device, an earphone microphone jack provided in most models is used. When the earphone microphone is attached to the jack, the transmitting microphone and the receiving speaker of the main body are switched to the earphone microphone side, and the subsequent calls are performed via the earphone microphone.

Accordingly, the user (speaker) of the mobile phone
Allows hands-free communication with both hands free without being deprived of a mobile phone.

[0007]

However, in the conventional portable telephone, the transmission microphone and the reception speaker on the main body side are separated from the internal circuit by mounting the earphone microphone, and are switched to the earphone microphone side collectively. Would be done. That is, since the communication path is switched at the same time as the transmission / reception, the voice of the other party can be heard only from the earphone of the earphone microphone.

[0008] For this reason, in the conventional portable telephone device, it is necessary for a speaker to wear an earphone microphone in his / her ear when using the portable telephone device in a hands-free manner, and a signal cable extending from the portable telephone device hinders driving. There was a fear.

The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a user-friendly mobile communication terminal device that can be used hands-free.

[0010]

In order to achieve the above object, the present invention provides a connection terminal to which an earphone microphone is connected, such as an earphone microphone jack, and a transmission microphone for converting a speaker's voice into a voice signal. A receiving speaker that outputs a sound signal from the other party as a sound, a loudspeaker different from the receiving speaker, and the presence or absence of connection of the earphone microphone to the connection terminal. A communication path switching means such as a switch switching control means for switching a path, and in a state where the earphone microphone is not connected to the connection terminal, the communication between the speaker and the other party can be performed by the communication path switching means. The communication is performed via the transmitting microphone and the receiving speaker, and in a state where the earphone microphone is connected to the connection terminal, the speaker To make a call with the call party via said loudspeaker and microphone of the earphone microphone, and to switch the path of the audio signal.

By taking such measures, during a hands-free call using the earphone microphone, the voice of the other party is output from the loudspeaker, and the voice of the speaker is collected by the microphone of the earphone microphone.

This eliminates the need for the speaker to wear the earphone microphone in the ear when using it hands-free.
Therefore, there is no danger that the signal cable of the earphone microphone is tied to the driver, and it is possible to prevent a trouble in driving and improve the usability. The microphone of the earphone microphone may be fixed at an arbitrary place in the vehicle (for example, a sun visor), and the mobile phone may be fixed to a dashboard or the like using a holder that can be purchased at a low price.

Further, in the present invention, for example, when the earphone microphone is connected to the connection terminal by including a call mode setting means such as a mode setting control means, the first and second modes are distinguished as, for example, a loudspeaker mode and an earphone mode. In the case of making a call in the first call mode, a call between the speaker and the other party is made via the microphone of the earphone microphone and the loudspeaker. When a call is made in the second call mode, the communication path switching means is provided so that a call between the speaker and the other party can be made via the microphone of the earphone microphone and the earphone of the earphone microphone. To set the audio signal path.

By doing so, it is convenient because it is possible to arbitrarily set whether to use the earphone microphone and the loudspeaker or to use only the earphone microphone at the time of the telephone call.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a mobile communication terminal of the present invention is applied to a portable radio telephone will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a main part of a portable wireless telephone 1 according to the present embodiment. As shown in this figure, the portable wireless telephone 1 of the present embodiment has an antenna AN
T, antenna duplexer (DUP) 2, receiving circuit (RX)
3, a synthesizer circuit (SYN) 4, an A / D converter 5, a modem unit 6, a channel codec 7, a speech codec 8, a D / A converter 9, a receiving amplifier 10, and change-over switches (SW) 52, 53, 54, 55; Receiving speaker 11, earphone microphone jack 51, transmitting microphone 1
2. Transmission amplifier 13, A / D converter 14, D / A converter 15, transmission circuit (TX) 16, control unit 17, L
CD display 18, key unit 19, oscillation circuit 20, speaker amplifier 42, loudspeaker 43, ROM 27, R
AM28.

A synthesizer circuit 4, a modem unit 6, a channel codec 7, a speech codec 8,
The OM 27 and the RAM 28 are connected to the control unit 17 via the control bus 32.

Changeover switches (SW) 52, 53, 54,
Reference numeral 55 denotes a two-contact switching switch, which operates under the control of the control unit 17. The changeover switches 52 and 53 operate in conjunction with each other.

An earphone microphone 100 as shown in FIG. 2, for example, is attached to the earphone microphone jack 51.
As shown in FIG. 2, the earphone microphone 100 generally has an earphone 101 at its tip and a microphone 102 in the middle of a signal cable (not labeled). 102 comes to the right position (near the mouth).

FIG. 3 shows a portable radio telephone 1 according to the present embodiment.
Here is an example of using. In this figure, use in a vehicle interior is assumed. For example, the portable radio telephone 1 may be placed on a dashboard or the like so as not to slip down, or an adhesive tape,
Alternatively, it is fixed with a holder (not shown). Then, the earphone 101 of the earphone microphone 100 extending from the mobile wireless telephone 1 is fixed so as to be hooked on a sun visor (not denoted by a reference numeral) on the driver side. At this time, the microphone 102
Hang from the sun visor so that you can pick up the driver's voice. The portable wireless telephone 1 is attached to the A-pillar 103 of the automobile, and the earphone microphone 10
0 may crawl on the inner wall of the room.

In FIG. 1, a radio frequency signal transmitted from a radio base station via a radio communication channel is received by an antenna ANT, subjected to radio-electric signal conversion, and then received via an antenna duplexer 2. Input to the circuit 3.

In the receiving circuit 3, the radio frequency signal is first amplified by a preamplifier (not shown). Subsequently, the radio frequency signal is mixed down by the receiving circuit 3 using the local signal given from the synthesizer circuit 4 and converted into an IF frequency signal. Further, this IF frequency signal is amplified by the receiving circuit 3, and then becomes a QPSK signal, so that it is quadrature demodulated.

The synthesizer circuit 4 generates a local signal having a frequency specified by the control unit 17 according to the radio channel frequency, and supplies the local signal to the receiving circuit 3 and the transmitting circuit 16.

The IF frequency signal that has been subjected to quadrature demodulation by the receiving circuit 3 is digitized by the A / D converter 5 and then supplied to the modem unit 6.

The IF signal output from the receiving circuit 3 is subjected to delay detection in the modem unit 6, while establishing frame synchronization and detecting a color code, thereby reproducing a digital communication signal and control data. The reproduced digital communication signal is output to the channel codec 7 and the control data is output to the control bus 32.

The digital speech signal output from the modem unit 6 is subjected to deinterleaving and error correction decoding by a channel codec 7. As a result, a digital communication signal addressed to itself is extracted from the digital communication signals for a plurality of channels included in the digital communication signal output from the modem unit 6.

The digital speech signal extracted by the channel codec 7 is decoded by the speech codec 8 to reproduce a received voice signal.

The received voice signal is converted into an analog signal by the D / A converter 9, amplified by the receiving amplifier 10, and supplied to the switch 52. The changeover switch 52 outputs the received voice signal from the amplifier 10 to either the changeover switch 54 or the changeover switch 53.

When a received voice signal is given to the switch 54, the switch 54 outputs the received voice signal to either the receiving speaker 11 or the earphone microphone jack 51.

That is, when the changeover switch 54 connects the changeover switch 52 and the receiving speaker 11, an audio signal is output from the receiving speaker 11. The changeover switch 54 is connected to the changeover switch 52 and the earphone microphone jack 5.
1 is connected to the earphone microphone 100
Is output from the earphone 101.

The changeover switch 52 is connected to the changeover switch 5.
If the switch has been switched to the third side, the changeover switch 52
The switch 53 linked with the switch connects the switch 52 and the speaker amplifier 42. That is, the receiving amplifier 10 and the loudspeaker 43 are connected. As a result, a voice signal from the other party is output from the loudspeaker 43.

On the other hand, the voice uttered by the speaker is converted into a transmission voice signal by the transmission microphone 12 or the microphone 102 of the earphone microphone 100. And this transmitted voice signal is
A / D converter 1 after being amplified by transmission amplifier 13
4 digitized.

The digitized transmission voice signal is subjected to VSELP encoding processing by the speech codec 8 to be converted into a digital communication signal. The digital speech signal obtained by the speech codec 8 is subjected to error correction coding and interleave processing by the channel codec.

Further, the digital communication signal is transmitted to the modem 6
, A frame signal and a color code signal are added. As a result, the IF frequency signal obtained by performing the signal mapping process is set to the transmission timing by setting the D / D
The signal is supplied to the A converter 15.

The IF frequency signal is converted into an analog signal by a D / A converter 15 and supplied to a transmitting circuit 16. I
The F-frequency signal is first subjected to quadrature modulation in the transmission circuit 16, and further mixed up using a local signal provided from the synthesizer circuit 4 to be converted into a radio frequency signal of a predetermined transmission frequency. Then, this radio frequency signal is amplified by the transmission circuit 16 and then supplied to the antenna ANT via the antenna duplexer 2. Thus, the radio frequency signal is transmitted as a radio wave from the antenna ANT.

The control unit 17 operates based on the operation program stored in the ROM 27, and
8. Drive control of loudspeaker 43, synthesizer circuit 4
, The processing of the output signal of the key unit 19, the generation of a ring tone, and the like. The control unit 17 performs overall control so that each unit of the mobile phone can function as a mobile phone.

The control unit 17 controls the changeover switch 5 via a control signal line a, a control signal line b, and a control signal line c.
A switching instruction signal is given to 3, 55, and 54, and switching of each of the switches 52, 53, 54, and 55 is controlled. There are four changeover switches, of which changeover switch 5
Since the devices 2 and 53 operate in conjunction, only three control signal lines are required. For example, the control signal line a may be connected to the changeover switch 52.

The LCD display 18 is driven by the control unit 17 and displays an arbitrary image. Key unit 19
Accepts an instruction input by a speaker regarding a telephone number, outgoing call, end call, character input, or function setting or mode designation. Melody generator 21 generates an incoming melody signal.

The speaker amplifier 42 receives a receiving voice signal from the other party (a signal output from the receiving amplifier 10),
Alternatively, either an incoming melody signal (a signal output from the melody generator 21) is given via the changeover switch 53. The speaker amplifier 42 amplifies any of these signals to a level sufficient to drive the loudspeaker 43 and then provides the amplified signal to the loudspeaker 43. The loudspeaker 43 generates a signal provided from the speaker amplifier 42 as a sound output.

The oscillation circuit 25 supplies a predetermined clock signal to the control unit 17. ROM 27 is a flash ROM
Alternatively, it is configured using an EEPROM. The ROM 27 stores, in addition to the operation program of the control unit 17,
It is used to store various information that should be kept permanently, such as ring tone melody information, still image information, individual number, or wireless device adjustment information.

The RAM 28 should hold the setting state of the portable radio telephone 1, a telephone number, a digitally recorded signal, character information input by a speaker, or melody information for a relatively short period of time. Used to store various information. The RAM 28 is backed up by a backup battery (not shown), and can reliably hold the stored information for a long period of time.

By the way, the control means realized by the control unit 17 operating based on the operation program stored in the ROM 27 is a known means in a portable radio telephone such as a control means for enabling a voice call. In addition to general control means, switch switching control means 17a
And a mode setting control unit 17b.

The switch changeover control means 17a changes over the changeover switches 52, 53, 5 according to whether or not the earphone microphone 100 is attached to the earphone microphone jack 51 and the mode setting via the key unit 19 of the speaker.
4, 55 switching control is performed.

The mode setting control means 17b allows the speaker to select and specify one of two modes when the earphone microphone 100 is attached to the earphone microphone jack 51.
In the present embodiment, these modes are referred to as [earphone mode] and [loudspeaker mode] to distinguish them.

In the earphone mode, a reception voice signal from the other party is output from the earphone 101. In the loudspeaker mode, a received voice signal from the other party is output from the loudspeaker 43. In either mode, a transmission voice signal from a speaker is provided to the portable wireless telephone 1 via the microphone 102. Which mode to choose
The control unit 1 according to a speaker's selection via the key unit 19
7 makes a decision.

Next, the operation of the portable radio telephone 1 configured as described above will be described according to the processing procedure of the control unit 17 shown in the flowchart of FIG. Step S in FIG.
1, the control unit 17 controls the changeover switches 52, 53, 54, 5
5 by controlling the melody generator 21 to the speaker amplifier 4
2, the receiving amplifier 10 is connected to the receiving speaker 11, and the transmitting microphone 12 is connected to the transmitting amplifier 13. As a result, a default call path is set.

When step S1 is completed, the control unit enters the standby state of step S2. In this step, when an incoming call signal from the other party arrives, or when a call operation is performed by the speaker, the control unit 17 proceeds to step S3.

In step S3, control unit 17 determines whether or not earphone microphone 100 is attached to earphone microphone jack 51. If it is not mounted here (No), the process directly proceeds to step S7 and the control unit 17
Starts call processing. Here, the speaker's voice is microphone 1
2 and is sent to the transmitting amplifier 13, and the voice of the other party is output from the receiving amplifier 10 via the receiving speaker 11. That is, the receiving speaker 11 and the transmitting microphone 12
And the call using. When the call ends, the control unit 17 detects this end call in step S8 and returns to step S1.

On the other hand, it is assumed that the earphone microphone 3 is attached to the earphone microphone jack 51 in step S3.
In this case, the control unit 17 proceeds from step S3 to step S4.
Then, it is determined whether the call mode at this time is the [loudspeaker mode] or the [earphone mode].

Here, in the case of the [loudspeaker mode], the controller 1
7 shifts to step S5. In step S5, the control unit 17 controls the changeover switch 55 to connect the earphone microphone jack 51 to the transmission amplifier 13. Accordingly, the transmission microphone 12 is disconnected from the transmission amplifier 13. In addition, the control unit 17 controls the changeover switch 5
2 and 53 to connect the receiving amplifier 10 to the speaker amplifier 42. Accordingly, the melody generator 21 is disconnected from the speaker amplifier 42. In this way, a communication route in the loudspeaker mode is set.

Therefore, when a call is started in this state, the speaker's voice is transmitted to the microphone 102 of the earphone microphone 100.
And sent to the transmission amplifier 13. The voice of the other party is output from the receiving amplifier 10 via the speaker amplifier 42 and the loudspeaker 43. Thus, the speaker can make a hands-free call using the microphone 102 and the loudspeaker 43.

On the other hand, if the [earphone mode] is set, the control section 17 proceeds from step S4 to step S6. In step S6, the control unit 17 controls the changeover switch 55 so that the earphone microphone jack 51
Is connected to the transmission amplifier 13. At the same time, the changeover switches 52 and 54 are controlled to connect the receiving amplifier 10 to the earphone microphone jack 51. In this way,
A call path in the earphone mode is set.

Therefore, when a call is started in this state, the voice of the speaker is transmitted to the microphone 102 of the earphone microphone 100.
And sent to the transmission amplifier 13. The voice of the other party is output from the receiving amplifier 10 via the earphone 101. Thus, the speaker can make a hands-free call using the microphone 102 and the earphone 101.

In any of the loudspeaker mode and the earphone mode, when the communication is finished, the control unit 17 returns from step S8 to step S1, and resets the communication path to the default state described above.

As described above, in the present embodiment, the changeover switches 54 and 55 are operated independently of each other, and the control signal lines c and b from the control unit 17 are respectively connected so that the switching control can be performed separately. I do. When the earphone microphone 100 is not mounted, each of the changeover switches 52, 53, 5 by the switch changeover control means 17a.
4 and 55, the melody generator 21 is used as the speaker amplifier 42, and the receiving amplifier 10 is used as the receiving speaker 11
Then, the transmission microphones 12 are connected to the transmission amplifiers 13, respectively.

Further, in the present embodiment, the mode setting control means 17b is provided so that two modes of [loudspeaker mode] and [earphone mode] can be selected and designated when the earphone microphone 100 is mounted.

In the loudspeaker mode, the earphone microphone jack 51 is connected to the transmission amplifier 13 and the reception amplifier 10 is connected to the speaker amplifier 42. This is the switch 5
2, 53 and 55 are switched.

In the earphone mode, the earphone microphone jack 51 is connected to the transmission amplifier 13 and the reception amplifier 10 is connected to the earphone microphone jack 51. This is performed by switching the changeover switches 52, 54, 55.

As described above, the changeover switches 54 and 55 can be controlled independently of each other, so that the loudspeaker 43 and the microphone 102 of the earphone microphone 100 can be selectively combined and used.

That is, when the speaker is set to the loudspeaker mode during a hands-free call, reception can be performed using the loudspeaker 43 and transmission can be performed using the microphone 102, so that the speaker does not need to wear the earphone 101 in his / her ear. . As a result, it is possible to improve the usability when using in a hands-free manner.

In the portable radio telephone 1 according to the present embodiment, the earphone mode can be selected. For this reason, if the speaker wishes,
A call using the earphone 101 and the microphone 102 can also be performed. This is a function that can be conveniently used, for example, when the vehicle is stopped or when the mobile wireless telephone 1 is taken out of the vehicle. By making this mode available by setting the mode, the usability can be further improved. .

Incidentally, conventionally, the changeover switches 54, 5
5 operate in conjunction with each other, and accordingly, the control signal line is either the control signal line c connected to the changeover switch 54 or the control signal line b connected to the changeover switch 55. There was only. For this reason, the loudspeaker 43 and the microphone 102 cannot be used in combination, and when the microphone 102 is used, the earphone 101 must necessarily be used.

The present invention is not limited to the above embodiment. For example, the method of installing the earphone microphone 100 is not limited to the above. For example, a suction cup may be provided on the microphone 102, and the suction cup may be attached to a glass surface of an automobile. Alternatively, various methods are conceivable, such as attaching the microphone 102 to an arbitrary place with an adhesive tape.

In the present embodiment, the earphone microphone 100 having the earphone 101 and the microphone 102 is used. However, even if only the microphone is connected to the main body, it is possible to perform a call in the loudspeaker mode which is a feature of the present invention. Is possible. In addition, various modifications can be made without departing from the spirit of the present invention.

[0064]

As described above in detail, according to the present invention, the connection terminal to which the earphone microphone is connected, the transmitting microphone for converting the voice of the speaker into a voice signal, and the voice signal from the other party are output as sound. A receiving speaker, a loudspeaker different from the receiving speaker, and a telephone call such as a switch switching control unit for switching a route of a voice signal of the speaker and the other party depending on whether the earphone microphone is connected to the connection terminal. Route switching means, and in a state in which the earphone microphone is not connected to the connection terminal, a call between a speaker and the other party can be performed via the transmission microphone and the receiving speaker by the communication path switching means. When the earphone microphone is connected to the connection terminal, the call between the speaker and the other party can be performed by the microphone of the earphone microphone. To perform through said loudspeaker, and to switch the path of the audio signal.

Further, in the present invention, for example, a communication mode setting means such as a mode setting control means is provided so that the first and second communication modes can be selectively set when the earphone microphone is connected to the connection terminal, When a call is made in the first call mode, a call between the speaker and the other party is made via the microphone of the earphone microphone and the loudspeaker, and a call is made in the second call mode. In this case, the communication path switching means sets a voice signal path so that a call between the speaker and the other party can be made through the microphone of the earphone microphone and the earphone of the earphone microphone. .

From these facts, it is possible to provide a mobile communication terminal device which can be used hands-free and is easy to use.

[Brief description of the drawings]

FIG. 1 is a portable wireless telephone 1 according to an embodiment of the present invention.
FIG.

FIG. 2 is an external view showing an example of an earphone microphone 100.

FIG. 3 is a portable wireless telephone 1 according to an embodiment of the present invention.
FIG. 2 is a diagram showing an example of a state in which an earphone microphone 100 is mounted inside a vehicle.

FIG. 4 is a flowchart showing a processing procedure of a control unit 17 according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Portable radiotelephone ANT ... Antenna 2 ... Antenna duplexer (DUP) 3 ... Receiving circuit (RX) 4 ... Synthesizer circuit (SYN) 5 ... A / D converter 6 ... Modem part 7 ... Channel codec 8 ... Speech codec 9 ... D / A converter 10 ... Reception amplifier 11 ... Reception speaker 12 ... Transmission microphone 13 ... Transmission amplifier 14 ... A / D converter 15 ... D / A converter 16 ... Transmission circuit (TX) 17 ... Control unit a, b, c ... Control signal line 17a ... Switch switching control means 17b ... Mode setting control means 18 ... LCD display 19 ... Key unit 20 ... Oscillation circuit 21 ... Melody generator 27 ... ROM (FROM) 28 ... RAM 32 ... Control bus 42 ... Speaker Amplifier 43 ... Loudspeaker 51 ... Earphone microphone jack 52, 53, 54, 55 ... Switching Switch (SW) 100: Earphone microphone 101: Earphone 102: Microphone 103: A pillar of the car

Claims (2)

[Claims] 1. A connection terminal to which an earphone microphone is connected, a transmitting microphone for converting a voice of a speaker into a voice signal, a receiving speaker for outputting a voice signal from a communication partner as a sound, and a loudspeaker different from the receiving speaker. A speaker, and communication path switching means for switching a path of a voice signal of the speaker and a communication partner depending on whether or not the earphone microphone is connected to the connection terminal. The communication path switching means includes: In a state where the earphone microphone is not connected, a call between the speaker and the other party is performed via the transmitting microphone and the receiving speaker, and in a state where the earphone microphone is connected to the connection terminal, A path of the audio signal is switched so that a call between the speaker and the other party can be made via the microphone of the earphone microphone and the loudspeaker. A mobile communication terminal device characterized by the above-mentioned. 2. A communication mode setting means for selecting and setting a communication mode when the earphone / microphone is connected to the connection terminal to one of first and second communication modes different from each other, A path switching unit configured to perform a call between the speaker and the other party via the microphone of the earphone microphone and the loudspeaker when the first call mode is selected by the call mode setting unit; Setting a route of the voice signal, and, when the second call mode is selected by the call mode setting means, communicating between the speaker and the other party with the microphone of the earphone microphone and the earphone of the earphone microphone 2. The mobile communication terminal device according to claim 1, wherein a path of an audio signal is set so as to perform the communication via the terminal.