JPH10173745A - Car audio - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve operational environment and to eliminate waste in structure by providing a means for switching an input to an audio amplifier from an audio signal to the received signal of portable telephone terminal and a means for controlling the switching means, when the ringer tone of portable telephone terminal is received. SOLUTION: In the state of no telephone call, the audio signal from a selector circuit 100 is amplified through a switch 131 by an audio amplifier 140 and outputted in voice from a speaker 150 later. When there is call incoming to a portable telephone terminal 121, the ringer tone sounded from the portable telephone terminal 121 is possessed by a portable telephone connection adapter 120 as a ringer signal and inputted to a switch control part 132. When the ringer tone signal is inputted, the switch control part 132 controls a switch 131, so as to output the received signal from the portable telephone connection adapter 120 to the audio amplifier 140. A speaking state is provided by the operate button of portable telephone terminal 121.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a car audio system,
More specifically, the present invention relates to a car audio designed to be connectable to a mobile phone.

[0002]

2. Description of the Related Art In recent years, car audios having various functions have become widespread. On the other hand, mobile phones that enable hands-free communication have become widespread, and driving vehicles and boarding vehicles have more opportunities to use mobile phones while listening to car audio.

[0003]

However, conventional car audio systems do not have a function of connecting to a mobile phone, so when using a hands-free mobile phone, the user must operate the mute key of the car audio every time. However, the voice must be reduced, and there is room for improving the operability. Further, it is not preferable to operate such a mute key or the like while driving a car from the viewpoint of driving safety.

[0004] In addition, despite the fact that there is a car audio speaker, a hands-free mobile phone has a dedicated speaker, which is wasteful in structure. SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a useful car audio capable of improving the operation environment and solving structural waste at the time of using a mobile phone.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a switching means for switching an input to an audio amplifier from an audio signal to a reception signal of a portable telephone terminal, and receiving a ringer sound signal of the portable telephone terminal. And control means for controlling the switching of the switching means.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) FIG. 1 is a diagram showing a configuration of a car audio according to Embodiment 1. The figure includes a selector circuit 100, a microphone amplifier 110, a mobile phone connection adapter 120, a switching circuit 130, an audio amplifier 140, and a speaker 150.

The selector circuit 100 includes a vehicle-mounted CD player (not shown), a cassette tape deck (not shown), an FM
Various audio signals from / AM Radio (not shown) are input, and any one of the audio signals is output to the switching circuit 130 based on a user's operation instruction.
The microphone amplifier 110 receives an MIC input from a microphone (not shown) provided in the car audio, amplifies the MIC input, and outputs the amplified signal to the mobile phone connection adapter 120 as a transmission signal.

[0008] A mobile phone connection adapter 120 is connected to a mobile phone terminal 111 such as a mobile phone (analog or digital) or a PHS, and acquires a reception signal and a ringer sound signal from a reception unit and a ringer speaker of the mobile phone terminal 121. I do. The acquired reception signal and ringer sound signal are output to the switching circuit 130. Further, it receives a transmission signal from the microphone amplifier 110 and outputs a voice to a transmission section of the mobile phone terminal 121.

The switching circuit 130 includes a switch 131 and a switch control unit 132. The switch 131 is
It receives an audio signal from the selector circuit 100 and a reception signal from the mobile phone connection adapter 120 and outputs one of the signals to the audio amplifier 140 under the control of the switch control unit 132. In an initial state, an audio signal is output to the audio amplifier 140.

[0010] The switch control unit 132 controls the switch 1 to output a reception signal to the audio amplifier 140 when a ringer sound signal is received from the mobile phone connection adapter 120.
Switch 31. Also, by the user's arbitrary operation,
The switch 131 can be switched. The audio amplifier 140 receives an audio signal or a reception signal from the switching circuit 130, amplifies the signal, and outputs the amplified signal to the speaker 150.

The speaker 150 is an in-vehicle speaker for car audio, and outputs sound based on an amplified signal from the audio amplifier 140. FIG. 2 is an enlarged cross-sectional view of the mobile phone connection adapter 120. The mobile phone connection adapter 120 includes a receiving microphone 21 and a transmitting speaker 22.
, A ringer microphone 23, and a signal processing unit 24.

The receiving microphone 21 is provided at a position facing the receiving speaker 25 of the receiving section of the portable telephone terminal 121.
The audio output output from the receiving speaker 25 is obtained.
The transmission speaker 22 is provided at a position facing the transmission microphone 26 of the transmission section of the mobile phone terminal 121, and the signal processing section 2
The audio output of the speaker output from the speaker 4 is output from the speaker.

The ringer microphone 23 is connected to the mobile phone terminal 121.
And is provided at a position facing the ringer speaker 27 provided on the back surface of the device, and acquires a ringer sound from the ringer speaker 27. The signal processing unit 24 includes microphone amplifiers 31 and 32, a speaker amplifier 33, a transmission buffer 34, a reception buffer 35, and an I / F connector 36, as shown in FIG.

The microphone input from the receiving microphone 21 is amplified by the microphone amplifier 31, the signal level is adjusted by the transmission buffer 34, and then output to the switching circuit 130 as a receiving signal via the I / F connector 36. Is done. The microphone input from the ringer microphone 23 is amplified by the microphone amplifier 32, the signal level is adjusted in the transmission buffer, and then output as a ringer sound signal via the I / F connector 36.

After the transmission signal input from the switching circuit 130 is adjusted in the reception buffer via the I / F connector 36, the speaker amplifier 33
And is output to the transmission speaker 22 as a speaker output. FIG. 4 is a front external view of the mobile phone connection adapter 120. The mobile phone connection adapter 120 is
It is hollow and has a structure in which the mobile phone terminal 121 can be inserted into the cavity from above. A notch 40 is provided on the front of the mobile phone connection adapter 120, so that the operation panel of the mobile phone terminal 121 can be directly operated with the mobile phone terminal 121 inserted.

Next, the operation of the car audio according to the present embodiment will be described. First, when a call is not received, an audio signal from the selector circuit 100 is amplified by an audio amplifier 140 via a switch 131 as shown in FIG. Here, when there is an incoming call to the mobile phone terminal 121, the ringer sound emitted from the mobile phone terminal 121 is converted into a ringer sound signal by the mobile phone connection adapter 120.
And is input to the switch control unit 132.
The switch control unit 132 controls the switch 131 so that the reception signal from the mobile phone connection adapter 120 is output to the audio amplifier 140 when the ringer sound signal is input. At this time, when the user presses the operation button of the mobile phone terminal 121, a call state is established, and the other party's voice is output from the speaker 150 based on the reception signal. on the other hand,
The voice, which is the person's voice picked up by a microphone (not shown), is amplified by a microphone amplifier 110 and is output as a transmission signal to a transmission unit of the mobile phone terminal 121. The output voice is transmitted to the other party via the transmitting unit of the mobile phone terminal 121.

As described above, the car audio according to the present embodiment can switch between the audio signal and the reception signal based on the ringer sound signal, and the speaker of the car audio can be used in common with the portable telephone terminal. Can be. In addition, since the mobile phone connection adapter 120 is configured to exchange signals with the mobile phone terminal 121 by voice using a microphone or a speaker, the mobile phone connection adapter 120 is applicable to any type of mobile phone or PHS. Can be connected to an adapter.

The switching circuit 130 according to the present embodiment includes a switch 131 and a switch control unit 132, and is configured to switch between an audio signal and a reception signal. However, the present invention is not limited to this. For example, the switching circuit 130 may be configured by a selector circuit, and the selector circuit may switch between an audio signal, a ringer sound signal, and a reception signal. Specifically, a control unit for controlling the selector circuit is provided, and the control unit performs switching control of the selector circuit by giving priority to a ringer sound signal, a reception signal, and an audio signal in this order. (Embodiment 2) FIG. 5 is a diagram showing a configuration of a car audio according to Embodiment 2. This figure shows a selector circuit 100, an audio amplifier 140, and a speaker 150.
, An external interface 510 and a switching circuit 52
It consists of 0. Here, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The external interface 510 is connected to the digital portable telephone 512 via the connection cord 511, receives a reception signal and a call confirmation signal from the digital portable telephone 512, and outputs them to the switching circuit 520. Here, the incoming call confirmation signal is a signal notifying that there is an incoming call to the digital portable telephone 512. Further, it outputs a transmission signal and a call control signal to the digital mobile phone.
Here, the call control signal is a signal for controlling on-hook and off-hook of the digital mobile phone.

The switching circuit 520 includes a switch 521
, A switch 522, and a switch control unit 523. Switch 521 switches between an audio signal and a reception signal, similarly to switch 131 in the first embodiment. The switch 522 disconnects the signal path of the transmission signal under the control of the switch control unit 523.

The switch control unit 523 receives a call confirmation signal from the external interface 510,
Is switched to the reception signal side and the switch 522 is controlled to be closed. Further, when a signal for controlling off-hook among the call control signals is received from an operation button (not shown) provided on the car audio, the switch 52 is turned on.
1 is switched to the receiving signal side, and the switch 522 is controlled to be closed. When a signal for controlling on-hook is received from the call control signal, the switch 521 is switched to the audio signal side and the switch 522 is controlled to be opened.

The digital mobile phone 512 is a general PDC (Personal Digital Cellular) mobile phone, and is connected to an external interface 510 of car audio via a connector interface 513. The connector interface 513 is an external connector for connecting an external device usually provided on the bottom of the main body of the PDC mobile phone.

FIG. 6 is a diagram showing an appearance of a connector interface 513 provided in the digital portable telephone 512. The connector interface 513 includes terminal numbers 1 to 8 in the order from the left as indicated by 601 in the figure, and terminal numbers 9 to 16 from the left as shown in 602 in the figure. It has 16 terminals. 603 and 604 located on the left and right sides of the connector interface 513 are a transmission / reception antenna connection terminal and a reception antenna connection terminal, respectively.

FIG. 7 shows the connector interface 5.
13 is a diagram illustrating the role of each terminal of FIG. Among these terminals, the terminal with the terminal number 2 corresponds to the terminal for transmitting the above-mentioned transmission signal. Similarly, the terminal having the terminal number 10 is a terminal that carries the above-mentioned reception signal. Terminal number 12 and terminal number 1
The terminal 3 is a terminal that carries the above-described call control signal and call confirmation signal.

Next, the operation of the car audio according to the present embodiment will be described. First, when an incoming call arrives at the digital mobile phone 512, an incoming call confirmation signal is input to the switching circuit 520 via the connection code 511 and the external interface 510. The switch control unit 523 of the switching circuit 520 receives the call confirmation signal, switches the switch 521 to the reception signal side, and controls the switch 522 to close. At this time, when the user operates the operation button, a call control signal for going off-hook is sent to the digital mobile phone 512, and the telephone enters a call state. Then, the other party's voice is output from the speaker 150. On the other hand, the person's voice picked up by a microphone (not shown) is transmitted to digital mobile phone 512 as a transmission signal via switch 522.

After the call is over, the user operates the operation button, and the switch control unit 523 causes the switch 52 to operate.
Switch 1 to the audio signal side and switch 5
22 is controlled to open. Further, a call control signal for on-hook is sent to digital mobile phone 512, and the call ends. When making a call, the user operates the operation button, so that the switch control unit 523 switches the switch 521 to the reception signal side and controls the switch 522 to close. Further, the call control signal for off-hook is transmitted to the digital cellular phone 51.
The call is sent to 2 and a call is made, and a call can be made by pressing the number of the other party.

As described above, the car audio in the present embodiment is based on the incoming confirmation signal and the call control signal.
Can switch between audio signal and receiving signal,
A car audio speaker can be used in common with a digital mobile phone. Further, since the external connector provided in the digital mobile phone is used, off-hook and on-hook control can be performed from the car audio side.

In this embodiment, the switch 521 and the switch 522 are controlled when an incoming call is received, but the ringer sound is not output from the speaker 150, but may be output. In particular,
While the switching circuit 520 receives the call confirmation signal,
A circuit for generating a ringer sound is provided, and the signal
21 may be output to the receiving signal side.

[0029]

As described above, according to the present invention, the switching means for switching the input to the audio amplifier from the audio signal to the reception signal of the portable telephone terminal, and the switching means when the ringer sound signal of the portable telephone terminal is received, are provided. A switching means for controlling switching between an audio signal and a reception signal on the basis of a ringer sound signal from the mobile phone terminal, so that the car audio speaker can be used in common with the mobile phone terminal. Further, since it is not necessary to operate the mute key of the car audio to reduce the sound, the operability is improved.

The car audio supports a receiving microphone acoustically coupled to a receiving section of the portable telephone terminal,
Since a mobile phone terminal adapter for outputting the output of the receiving microphone to the switching means as the receiving signal is provided,
Any type of mobile phone or PHS can be connected to the adapter. The car audio further includes a mobile phone terminal adapter that supports the ringer microphone in a state acoustically coupled to a ringer speaker of the mobile phone terminal and outputs an output of the ringer microphone as a ringer sound signal used by the control unit. Therefore, any type of mobile phone, PHS, or the like can be connected to the adapter.

Further, the car audio further includes a transmission microphone for acquiring a user's voice as a transmission signal, and the mobile phone terminal adapter further includes a mobile phone terminal based on the transmission signal. Since the transmission speaker that outputs sound to the unit is supported, any type of mobile phone, PHS, or the like can be connected to the adapter.

Further, the portable telephone terminal has an external connector for connecting an external device, and the car audio obtains a reception signal from an external connector provided in the digital portable telephone. The telephone and the car audio speaker are connected, and the car audio speaker can be used in common with the mobile phone terminal.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a car audio according to a first embodiment.

FIG. 2 is an enlarged cross-sectional view of the mobile phone connection adapter of the car audio.

FIG. 3 is a diagram showing a configuration of a signal processing unit of the car audio.

FIG. 4 is a front external view of the mobile phone connection adapter.

FIG. 5 is a diagram showing a configuration of a car audio according to a second embodiment.

FIG. 6 is a diagram illustrating an appearance of a connector interface provided in the digital mobile phone.

FIG. 7 is a diagram showing the role of each terminal of the connector interface.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 selector circuit 110 microphone amplifier 120 mobile phone connection adapter 130 switching circuit 131 switch 132 switch control unit 140 audio amplifier 150 speaker 510 external interface 520 switching circuit

Claims (5)

[Claims] 1. A switching means for switching an input to an audio amplifier from an audio signal to a reception signal of a mobile phone terminal, and a control means for switching and controlling the switching means when a ringer sound signal of the mobile phone terminal is received. Car audio characterized by that. 2. The car audio system according to claim 1, further comprising a mobile phone terminal adapter for supporting a receiving microphone acoustically coupled to a receiving unit of the mobile phone terminal, and outputting an output of the receiving microphone to the switching unit as the receiving signal. The car audio according to claim 1, wherein 3. A mobile phone that supports a ringer microphone in a state where the car audio is acoustically coupled to a ringer speaker of a mobile phone terminal, and outputs an output of the ringer microphone as a ringer sound signal used by the controller. 3. The car audio according to claim 1, further comprising a terminal adapter. 4. The car audio further includes a transmission microphone for acquiring a user's voice as a transmission signal, and the mobile phone terminal adapter further includes a mobile phone terminal based on the transmission signal. The car audio according to claim 2 or 3, further comprising a transmission speaker that outputs sound to the unit. 5. The mobile phone terminal has an external connector for connecting an external device, and the car audio acquires a reception signal from an external connector provided on the digital mobile phone. The car audio according to claim 1, wherein