JP2009049825A - On-vehicle hands-free speaking apparatus, and control method of on-vehicle hands-free speaking apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle hands-free speaking apparatus capable of suppressing the concentration of a driver from being loose, or capable of enhancing safety even if the concentration of the driver becomes loose. <P>SOLUTION: The on-vehicle hands-free speaking apparatus 1, which is mounted on a vehicle and exchanges voice signals with a voice communication terminal 2, comprises: a voice input means 15 for inputting a voice; a voice output means 16 for outputting a voice; a speech judging means 23 for judging whether it is under a hands-free speech via the voice communication terminal 2; and a device control means 25 for controlling the on-vehicle hands-free speaking apparatus 1 based on a result of the judgment due to the speech judging means 23. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an in-vehicle hands-free call device and a control method for an in-vehicle hands-free call device.

  2. Description of the Related Art Conventionally, a car navigation apparatus having a navigation function for acquiring a current position of a vehicle and performing guidance according to the current position has been widely used. Such a car navigation apparatus has many functions that require a complicated operation by a user, and it is dangerous for a driving user (driver) to perform this complicated operation. Therefore, a car navigation device has been proposed in which it is determined whether or not the vehicle is running, and when the vehicle is running, the user cannot perform a predetermined key operation (for example, Patent Document 1). reference).

  Further, as car audio devices mounted on vehicles, car audio devices that are configured to be wirelessly connectable to mobile phones and that can perform hands-free calls via the connected mobile phones are known (for example, patents). Reference 2).

Japanese Patent Laid-Open No. 10-90390 JP 2001-244877 A

  In recent years, a hands-free call function has also been adopted in car navigation devices. That is, a car navigation device that is configured so as to be wirelessly connectable to a mobile phone and can perform a hands-free call via the connected mobile phone is also used. However, the driver's attention may be distracted during a hands-free call. For this reason, if a predetermined device such as a car navigation device is operated during a hands-free call, the attention may be further distracted.

  Accordingly, an object of the present invention is to provide an in-vehicle hands-free communication device that can suppress the driver's attention from being distracted, or can improve safety even if the driver's attention is distracted. It is another object of the present invention to provide a control method for an in-vehicle hands-free communication device.

  In order to solve the above-described problems, the present invention is mounted on a vehicle and is used in an in-vehicle hands-free communication device that exchanges audio signals with an audio communication terminal, and an audio input means for inputting audio, and outputs audio. Device for controlling a target device in the vehicle based on a result of determination by the call determination unit, voice determination unit for determining whether or not a hands-free call via a voice communication terminal is in progress Means.

  In the present invention, the in-vehicle hands-free communication device includes a traveling state determination unit that determines whether or not the vehicle is traveling, and the device control unit includes a traveling state determination unit in addition to the determination result in the call determination unit. It is preferable to control the target device based on the result of the determination.

  In the present invention, when the traveling state determining means determines that the vehicle is traveling and the call determining means determines that the handsfree call is being performed, the traveling state determining means determines that the vehicle is traveling. When the call determination unit determines that the hands-free call is not being performed, or when the driving state determination unit determines that the vehicle is not traveling and the call determination unit determines that the hands-free call is being performed, the device control is performed. It is preferable that the means tighten the restriction on the operation of the target device and / or the restriction on the operation of the target device.

  In the present invention, the in-vehicle hands-free communication device is, for example, an in-vehicle device having a navigation function for acquiring the current position of the vehicle and performing guidance according to the current position, and the target device is the in-vehicle device. .

  In the present invention, when the hands-free call via the voice communication terminal is on hold, the call determination means determines that the hands-free call is not being held. Alternatively, the device control means determines whether the hands-free call is via the voice communication terminal. When the free call is on hold, it is preferable to control the target device as not being in the hands-free call.

  In order to solve the above problems, the present invention includes a voice input means for inputting voice and a voice output means for outputting voice, and is mounted on a vehicle, and is connected to a voice communication terminal and a voice signal. Is a control method for an in-vehicle hands-free call device that performs communication, based on a call determination step for determining whether or not a hands-free call is made via a voice communication terminal, and a determination result in the call determination step And a device control step for controlling a target device in the vehicle.

  In the in-vehicle hands-free call device and the control method for the in-vehicle hands-free call device according to the present invention, it is possible to suppress the driver's attention from being distracted or the driver's attention from being distracted. It becomes possible to increase safety.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Schematic configuration of an in-vehicle hands-free call system)
FIG. 1 is a block diagram showing a schematic configuration of an in-vehicle hands-free call system 5 including an in-vehicle hands-free call device 1 according to an embodiment of the present invention.

  The in-vehicle hands-free call device 1 according to the present embodiment is mounted on a vehicle and exchanges audio signals with a mobile phone 2 as a voice communication terminal so that a user such as a driver can perform a hands-free call. It is. The in-vehicle hands-free communication device 1 according to the present embodiment is a car navigation device as an in-vehicle device having a navigation function for acquiring a current position of a vehicle and performing guidance according to the current position. Therefore, in the following, the in-vehicle hands-free communication device 1 of the present embodiment is referred to as “navigation device 1”. As shown in FIG. 1, this navigation device 1 constitutes a part of an in-vehicle hands-free call system 5 that includes a vehicle side device 3 for running and stopping the vehicle in addition to the mobile phone 2. .

  The mobile phone 2 includes a Bluetooth module 7 for performing wireless communication with the navigation device 1 using Bluetooth, which is one of short-range wireless communication technologies. In this embodiment, a hands-free call is performed via the mobile phone 2 using a voice input device 15 and a voice output device 16 which will be described later constituting the navigation device 1.

  The vehicle-side device 3 includes a vehicle speed detection device 8 that detects the traveling speed of the vehicle, a parking brake detection device 9 that detects whether the parking brake is applied, as a configuration related to the in-vehicle hands-free call system 5, And an accelerator control device 10 for controlling the accelerator. The vehicle side device 3 is electrically connected to the navigation device 1 via a predetermined wiring, and a detection signal from the vehicle speed detection device 8 and a detection signal from the parking brake detection device 9 are input to the navigation device 1. Is done.

  The navigation device 1 reproduces a Bluetooth module 11 for performing wireless communication with the mobile phone 2, a display device 12 for displaying various information, an operation device 13 for performing various operations, and music. Audio device 14, voice input device 15 as voice input means for inputting voice during a hands-free call, and voice output device 16 as voice output means for outputting voice during a hands-free call And a control unit 17 that performs various controls of the navigation device 1.

  In addition, the navigation device 1 has a GPS (Global Positioning System) receiver 19 that receives radio waves for detecting the current position of a vehicle (own vehicle) that is on board, and a GPS receiver as a configuration for performing a navigation function. The vehicle position detection device 20 that detects the vehicle position based on the radio wave received by the machine 19 and the traveling speed detected by the vehicle speed detection device 8 and the like, and a map database (DB) 21 are provided.

  The display device 12 is a liquid crystal display, for example. The display device 12 displays a map showing the current position of the vehicle on which the vehicle is boarded, various information such as the title of the music played on the audio device 14 and the current time.

  The operation device 13 is, for example, a push button or a touch panel. Using this operation device 13, various operations related to navigation functions such as enlargement / reduction (zoom in / out) of the screen being displayed on the display device 12 and setting of a destination, various operations of the audio playback device 14, etc. Is done.

  The audio device 14 includes storage means such as a hard disk drive (HDD) or a large-capacity flash memory. The audio device 14 is a player that reproduces music stored in the storage means, or a CD (Compact Disk) that is inserted. It is a player that plays back music or the like recorded on a disc.

  The voice input device 15 is a microphone. The audio output device 16 is a speaker and outputs audio during a hands-free call as described above. In addition, the voice output device 16 outputs voice other than the voice at the time of the hands-free call such as voice guidance to the destination based on the navigation function.

  The control unit 17 includes a call determination unit 23 as a call determination unit that determines whether or not a hands-free call is being made via the mobile phone 2 as a configuration related to the control during the hands-free call, Based on the determination result of the driving state determination unit 24 as a driving state determination unit that determines whether or not the vehicle is traveling, the determination result in the call determination unit 23, and the determination result in the driving state determination unit 24 And a device control unit 25 that controls the target device. Note that the control unit 17 is actually configured by arithmetic means such as a CPU (Central Processing Unit), storage means such as a RAM (Random Access Memory), and the like.

  The call determination unit 23 determines whether or not a hands-free call is being made via the mobile phone 2 as described above. Specifically, the call determination unit 23 determines whether a hands-free call is being performed based on an input signal from the Bluetooth module 11. In this embodiment, the call determination unit 23 determines, for example, that a hands-free call is being performed from the reception start time to the transmission completion time. Note that the start determination time of the hands-free call by the call determination unit 23 may be a time point when the mobile phone 2 is in an incoming state or a time point when the mobile phone 2 is in an off-hook state. Further, the end point of the hands-free call by the call determination unit 23 may be a point in time when the mobile phone 2 enters an on-hook state.

  As described above, the traveling state determination unit 24 determines whether or not the boarded vehicle is traveling. Specifically, for example, when the vehicle speed is detected by the vehicle speed detection device 8, the traveling state determination device 24 determines that the vehicle being boarded is traveling. Alternatively, when the parking brake detection device 9 detects that the parking brake is not applied (released), the traveling state determination device 24 determines that the vehicle being boarded is traveling.

  As described above, the device control unit 25 controls various target devices in the vehicle based on the determination result in the call determination unit 23 and the determination result in the traveling state determination unit 24. In this embodiment, the device control unit 25 controls the navigation device 1 based on the determination result in the call determination unit 23 and the determination result in the traveling state determination unit 24. Specifically, as described later, the device control unit 25 determines whether or not the zoom-in / out operation can be performed on the display device 12 based on the determination result in the call determination unit 23 and the determination result in the traveling state determination unit 24. Control. As described above, in this embodiment, the navigation device 1 is a target device to be controlled by the device control unit 25.

(Control method for in-vehicle hands-free communication device)
FIG. 2 is a flowchart for explaining an example of a control method related to the hands-free call of the in-vehicle hands-free call device 1 (navigation device 1) shown in FIG.

  An example of a control method related to the hands-free call of the navigation device 1 configured as described above will be described below. In this embodiment, the device control unit 25 performs zoom-in / out operations in the navigation device 1 (specifically, the display device 12) based on the determination result in the call determination unit 23 and the determination result in the traveling state determination unit 24. Control availability.

  That is, as in the flow shown in FIG. 2, first, when a user (driver or the like) operates the operation device 13 to perform a zoom-in / out operation, the traveling state determination unit 24 causes the vehicle to travel. It is determined whether it is in the middle (step S1). If it is determined in step S1 that the vehicle is traveling, the call determination unit 23 determines whether or not a hands-free call is being performed (step S2).

  If it is determined in step S1 that the vehicle is not traveling, or if it is determined in step S2 that the hands-free call is not being performed, the device control unit 25 displays a display device according to an operation on the operation device 13. The display device 12 is controlled so that 12 performs a zoom-in / out operation (step S3).

  On the other hand, when it is determined in step S2 that the hands-free call is in progress, the device control unit 25 operates the zoom-in / out operation of the display device 12 even if the operation device 13 performs an operation for performing the zoom-in / out operation. The display device 12 is controlled so as not to be performed (so that the zoom-in / out operation is prohibited) (step S4). That is, if it is determined in step S2 that a hands-free call is in progress, the zoom-in / out operation by the user is restricted.

  In this embodiment, step S2 is a call determination step for determining whether or not a hands-free call is being made via the mobile phone 2, and steps S3 and S4 are steps in step S2, which is a call determination step. This is a device control step for controlling the navigation device 1 as a target device based on the determination result.

(Main effects of this form)
As described above, in this embodiment, the call determination unit 23 determines whether or not a hands-free call via the mobile phone 2 is in progress, and the device control unit 25 is based on the determination result in the call determination unit 23. Controls the navigation device 1. Therefore, during the hands-free call, the operation of the navigation device 1 (specifically, zoom-in / out operation) that may further distract the driver's attention can be restricted, and the driver's attention can be reduced. Can be prevented from becoming distracted.

  In particular, in this embodiment, the traveling state determination unit 24 determines whether or not the vehicle is traveling, and the device control unit 25 determines whether the traveling state determination unit 24 determines in addition to the determination result in the call determination unit 23. The navigation device 1 is controlled based on the result. Specifically, when the driving state determination unit 24 determines that the vehicle is traveling and the call determination unit 23 determines that the hands-free call is being performed, the zoom-in / out operation is limited, Even when the driving state determination unit 24 determines that the vehicle is running, the call determination unit 23 determines that the hands-free call is not being performed, or the driving state determination unit 24 determines that the vehicle is not driving. Does not restrict zoom-in / out operations. That is, when the traveling state determination unit 24 determines that the vehicle is traveling and the call determination unit 23 determines that the hands-free call is being performed, the traveling state determination unit 24 is traveling the vehicle. And when the call determination unit 23 determines that the hands-free call is not being performed, or when the traveling state determination unit 24 determines that the vehicle is not traveling, the device control unit 25 performs the navigation device 1. There are stricter restrictions on operations.

  Therefore, when a hands-free call is performed while a vehicle having a high risk of accident is running, the operation of the navigation device 1 that may further distract the driver's attention can be restricted. Can increase the sex. Further, when the hands-free call is not performed even when the vehicle is traveling, or when the vehicle is not traveling even when the hands-free call is being performed, the operation of the navigation device 1 (specifically, Zoom-in / out operation), the convenience of the navigation device 1 can be improved.

(Other embodiments)
The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited to this, and various modifications can be made without departing from the scope of the present invention.

  In the above-described embodiment, when the driving state determination unit 24 determines that the vehicle is running in step S1 and the call determination unit 23 determines that the hands-free call is being performed in step S2, the zoom-in / out is performed. The operation is restricted. In addition to this, for example, if step S1 is omitted and the call determination unit 23 determines that a hands-free call is being performed regardless of whether the vehicle is running or not, the zoom-in / out operation is restricted. You may do it.

  In the embodiment described above, if it is determined in step S2 that a hands-free call is in progress, the zoom-in / out operation by the user is restricted (prohibited) in step S4. In addition to this, for example, if it is determined in step S2 that a hands-free call is in progress, the scroll operation of the map displayed on the display device 12 in step S4 and various operations of the audio device 14 may be restricted. good. Also, if it is determined in step S2 that a hands-free call is in progress, it is a relatively short-time operation, and it has been conventionally considered that it will not interfere with driving. All operations of the navigation device 1 and the audio device 14 that can be operated may be restricted.

  Further, when it is determined in step S2 that the hands-free call is in progress, the device control unit 25 may control the vehicle side device 3. For example, when it is determined in step S2 that the hands-free call is in progress, the device control unit 25 may control the accelerator control device 10 to limit the amount of depression of the accelerator. In this case, since the speed of the vehicle during the hands-free call can be limited, even if the driver's attention is distracted by the hands-free call, safety can be improved. In this case, the accelerator control device 10 is a target device to be controlled by the device control unit 25.

  In addition, when it is determined in step S2 that the hands-free call is in progress, the operation (function) of the navigation device 1 that hinders driving may be limited. For example, a display with a lot of movement such as an animation displayed on the display device 12 or a display of a long character string may be limited to perform a simple display or to stop the display during a hands-free call. Further, for example, the display of the guidance telop displayed on the display device 12 may be prohibited, the telop display may be suspended during the hands-free call, and the telop display may be resumed after the hands-free call. Furthermore, for example, voice guidance based on a navigation function may be prohibited, voice guidance may be suspended during a hands-free call, and voice guidance may be resumed after a hands-free call.

  In the above-described form, when the call determination unit 23 determines that the hands-free call is in progress in step S2, the device control unit 25 restricts the zoom-in / out operation by the user in step S4. In addition to this, for example, even when a hands-free call is in progress, if the hands-free call is on hold, the call determination unit 23 determines that the hands-free call is not in progress and restricts the zoom-in / out operation. It is not necessary. Alternatively, even when a hands-free call is in progress, if the hands-free call is on hold, the device control unit 25 does not have to limit the zoom-in / out operation as not being a hands-free call. In this case, since the zoom-in / out operation can be performed while the hands-free call is difficult to reduce the attention level, the convenience of the navigation device 1 can be improved.

  In the embodiment described above, when it is determined in step S1 that the vehicle is traveling, it is determined in step S2 whether or not a hands-free call is in progress. In addition to this, for example, it may be first determined whether or not a hands-free call is being performed, and if it is determined that a hands-free call is being performed, it may be determined whether or not the vehicle is running.

1 is a block diagram showing a schematic configuration of an in-vehicle hands-free call system including an in-vehicle hands-free call device according to an embodiment of the present invention. It is a flowchart for demonstrating an example of the control method regarding the hands-free call of the vehicle-mounted hands-free call apparatus shown in FIG.

Explanation of symbols

1 Navigation device (car navigation device, in-vehicle hands-free communication device)
2 Mobile phone (voice communication terminal)
15 Voice input device (voice input means)
16 Voice output device (voice output means)
23 Call determination unit (call determination means)
24 Traveling state determination unit (traveling state determination means)
25 Device control unit (device control means)
S2 Call determination step S3, S4 Device control step

Claims (6)

In a vehicle-mounted hands-free call device that is mounted on a vehicle and exchanges audio signals with a voice communication terminal,
Voice input means for inputting voice, voice output means for outputting voice, call determination means for determining whether or not a hands-free call is made via the voice communication terminal, and the call determination means An in-vehicle hands-free communication device, comprising: device control means for controlling the target device in the vehicle based on the determination result in (1). A running state judging means for judging whether or not the vehicle is running;
2. The in-vehicle hands-free call according to claim 1, wherein the device control unit controls the target device based on a determination result of the running state determination unit in addition to a determination result of the call determination unit. apparatus.   When the traveling state determining unit determines that the vehicle is traveling and the call determining unit determines that the handsfree call is being performed, the traveling state determining unit determines that the vehicle is traveling. And when the call determination means determines that the hands-free call is not being performed, or when the travel state determination means determines that the vehicle is not traveling and the call determination means determines that the hands-free call is being performed. 3. The in-vehicle hands-free call device according to claim 2, wherein the device control unit further restricts the operation of the target device and / or the operation of the target device.   The in-vehicle hands-free communication device is an in-vehicle device having a navigation function for acquiring a current position of the vehicle and performing guidance according to the current position, and the target device is the in-vehicle device. The in-vehicle hands-free call device according to any one of claims 1 to 3.   The call determination means determines that a hands-free call is not being made when a hands-free call via the voice communication terminal is on hold, or the device control means determines that the hands-free call via the voice communication terminal is not 5. The in-vehicle hands-free call device according to claim 1, wherein when the free call is on hold, the target device is controlled as not being in a hands-free call. A control method for an in-vehicle hands-free communication device that is equipped with a voice input means for inputting voice and a voice output means for outputting voice and that is mounted on a vehicle and exchanges voice signals with a voice communication terminal. There,
A call determination step for determining whether or not a hands-free call is made via the voice communication terminal; and a device control step for controlling a target device in the vehicle based on a determination result in the call determination step. A control method for an in-vehicle hands-free communication device.

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