JP2622867B2 - Car phone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] When using a car phone, lower the volume of the car audio system,
Alternatively, by interrupting the function of shutting down during data communication of a facsimile or the like, it is possible to avoid interruption of the reproduction operation by the audio device as much as possible.

[Industrial applications]

The present invention relates to an automobile telephone device having a volume control function of an in-vehicle audio device.

[Conventional technology]

The car phone mounted on the vehicle is installed in the same cabin space as the on-board audio device, so if the audio device is active during a call, the other party's voice will be difficult to hear or this voice will be transmitted to the other party. A difficult problem arises.

For this reason, conventionally, when a car phone is used, the car may be provided with a function of reducing or cutting off the output volume of the audio device.

[Problems to be solved by the invention]

The above-described volume control function of the audio device by the car phone is unnecessary when the car phone is used for data communication such as facsimile, but conventionally, the volume control of the sound device is performed by making such distinction. Absent.

The present invention minimizes the volume control of the sound device,
It is intended to reduce unnecessary interruption of reproduction of the audio device.

[Means for solving the problem]

The present invention relates to a car telephone device having a function of giving a sound volume control signal to an on-vehicle audio device, a discriminating means for discriminating between voice communication and data communication, and transmitting a sound volume control signal based on the result of the discriminating means. It has a control means.

[Action]

Since the control unit of the car telephone can determine whether the communication mode is voice communication or data communication such as facsimile, the volume control (reduction or cutoff) of the audio device is performed only during the voice communication.
Can be controlled to be transmitted.

In this way, for example, during communication by facsimile, reproduction by the audio device is not hindered.

〔Example〕

FIG. 1 is a block diagram of an embodiment of the present invention, in which reference numeral 10 denotes an automobile telephone device, and reference numeral 20 denotes a vehicle-mounted acoustic device. The mobile phone device 10 includes a dedicated antenna 11, a mobile phone radio device 12 for performing wireless communication with a fixed station (telephone station), and a handset control unit for transmitting and transmitting dial signals and the like and controlling the level of a received voice signal. 13. A handset 14 with a microphone, speaker, dial button, etc. is standard equipment, and a facsimile (FAX) 1
When adding 5, a FAX-telephone switch 16 for switching the line between the mobile telephone radio 12, the handset control unit, and the FAX 15 is added.

The on-vehicle acoustic device 20 is, for example, a tape player with a radio, a radio antenna 21, a radio tuner 22, a tape deck 23, a radio / tape changeover switch 24 for selecting which of a radio and a tape to reproduce, and a preamplifier 2.
5, mute circuit 26 to reduce the volume of the playback sound, volume volume VR to reduce the volume of the playback sound, power amplifier 27,
A speaker 28 and a control unit 29 are provided. The control unit 29 controls the tuner 22 and the deck 23, and appropriately supplies a mute signal to the mute circuit 26. A general mute signal is output when the tuner 22 is selected or when the changeover switch 24 is switched. Alternatively, when a volume control signal is received from the control unit 13 of the car telephone device 10, the mute signal is output. Is output.

The handset control unit 13 of the mobile telephone device 10
FAX (data) at present with mode signal from telephone switch 16
Since it is possible to determine whether the mode is the telephone mode or the telephone (voice) mode, a volume control signal is output only in the telephone mode. Therefore, FA
During communication by X15 (FAX mode), since the volume control signal is not output, the control unit 29 of the audio device 20 does not output a mute signal, and the audio device 20 enters a normal reproduction state.

FIG. 2 is a flowchart showing output control of a volume control signal (here, a mute signal) by the handset control unit 13. Step S1 is a process of monitoring the operation of picking up (off-hook) the handset 14 in the standby state. If it is determined that the hook is off hook in this step S1,
In step S2, a mute signal is output first. This operation is performed because it is necessary to check the state of the other party at the time of outgoing and incoming calls even in the case of facsimile, and it is necessary to reduce the volume of the audio device. Next, in step S3, it is determined from the mode signal of the switch 16 whether the FAX communication button has been turned ON. If it does not turn on, the audio mode is set, so a mute signal is output in step S4. In step S5, the process waits until it is detected that the handset 14 is placed (goes on-hook), that is, the call is completed, or it is detected in step S3 that the FAX communication button is turned on. Then, when the hook is turned on, the transmission of the mute signal is stopped in step S6.

On the other hand, if it is determined in step S3 that the fax communication button is ON, the transmission of the mute signal is stopped in step S7, and step S8
Wait for the handset 14 to go on-hook. Therefore,
Since the mute signal is transmitted only when the operator (caller) is listening to the reception sound signal, the mute operation of the on-vehicle audio device 20 can be suppressed to a minimum.

〔The invention's effect〕

As described above, according to the present invention, there is an advantage that even when the car telephone has a sound volume control function of the in-vehicle audio device, the function can be kept within a range that does not hinder the call.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG. 2 is a flowchart showing a mute control process of a handset control unit.

Claims (1)

(57) [Claims] An automobile telephone device having a function of providing a volume control signal to an on-vehicle audio device, a discriminating means for discriminating between voice communication and data communication, and transmitting a volume control signal based on a result of the discriminating means. A mobile telephone device having control means for performing the following.