JP2006254285A - Onboard apparatus and method of controlling onboard apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clearly listen to a voice of a speech object even during a travel by applying an onboard apparatus and method of controlling the same to a car audio system or car navigation system capable of forming a hands-free system, for example. <P>SOLUTION: When contents are provided by voice, the voice are provided with a volume in response to operation of a manipulator for volume control, and when providing the voice by a hands-free system, the voice is provided with a volume corresponding to noise. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicle-mounted device and a method for controlling the vehicle-mounted device, and can be applied to, for example, a car audio device and a car navigation device that can form a hands-free system. According to the present invention, when providing sound by content, the sound is provided with a volume corresponding to the operation of the volume control operator, and when providing the sound with a hands-free system, the amount of noise is determined. By providing sound by volume, it is possible to clearly hear the voice of the call target even while traveling.

  2. Description of the Related Art Conventionally, a car audio device that is an in-vehicle device changes a volume output from a speaker in response to an operation of a volume adjustment operator, thereby enabling music, radio broadcasting, etc. to be listened to at a volume desired by a user. Has been made. With regard to such a car audio apparatus, for example, Japanese Patent Laid-Open No. 10-236246 proposes a method for controlling the volume and the like according to the position of the vehicle.

  In addition, a car navigation device, which is a similar in-vehicle device, guides a user by displaying a map or the like and voice, and in recent years, a device that accepts an operation by voice input has been provided.

  Conventionally, a mobile phone can be safely talked even when a vehicle is driven by forming a hands-free system using a headset.

By the way, even when making a call using a hands-free system using a headset or the like, it may be difficult to hear the voice of the call target while traveling. Even in such a case, if it is possible to clearly hear the voice of the telephone call, it is possible to concentrate on driving accordingly, and the safety can be further improved.
Japanese Patent Laid-Open No. 10-236246

  The present invention has been made in view of the above points, and an object of the present invention is to propose an in-vehicle device and a control method for the in-vehicle device that can clearly hear the voice of a call object even during traveling.

  In order to solve this problem, in the first aspect of the invention, the control unit is applied to an in-vehicle device forming a hands-free system of a mobile phone, and the control unit drives the speaker by an audio signal output from the source. In response to the operation of the volume adjustment operator, the sound volume output from the speaker is set, and when the speaker is driven by sound data acquired by the mobile phone, depending on the amount of noise, Change the volume of the sound output from the speaker.

  Further, in the invention of claim 8, when the speaker is driven by an audio signal output from the source when applied to a control method of an in-vehicle device forming a hands-free system of a mobile phone, In response to the operation, the volume of the sound output from the speaker is set, and when the speaker is driven by the sound data acquired by the mobile phone, the volume of the sound output from the speaker is set according to the amount of noise. Variable.

  When listening to content such as music while driving, there are many cases where you are listening vaguely, even if you can not hear a little, there are features that you do not care about, and the volume has changed frequently, On the contrary, it becomes annoying. On the other hand, in the case of a call using a mobile phone, it is often the case that the subject of the call is listened to, and it is desired that the voice output can be heard more clearly than when listening to content such as music. Thus, according to the configuration of claim 1, when applied to an in-vehicle device that forms a hands-free system for a mobile phone, the control means controls the volume when the speaker is driven by an audio signal output from the source. When the volume of sound output from the speaker is set in response to the operation of the operator and the speaker is driven by sound data acquired by the mobile phone, the sound output from the speaker according to the amount of noise If the content volume is variable, the volume will not change frequently when content is provided, and during a call, the volume can be changed according to the amount of noise so that it can be heard clearly. Can be.

  Thereby, according to the structure of Claim 8, the control method of the vehicle-mounted apparatus which can hear the audio | voice of call object clearly can be provided.

  According to the present invention, it is possible to clearly hear a voice to be talked even while traveling.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

(1) Configuration of Embodiment FIG. 2 is a block diagram showing an in-vehicle system according to Embodiment 1 of the present invention. In the in-vehicle system 1, a hands-free system for the mobile phone 4 is formed using the car audio device 2 and the car navigation device 3.

  That is, in the in-vehicle system 1, the mobile phone 4 executes processing related to a series of calls in response to a user operation by the mobile phone unit 5. That is, the mobile phone unit 5 establishes a line with the call target in response to the user's operation, acquires the user's voice with a microphone (not shown), sends the call to the call target, and receives the voice obtained from the call target. Provided to the user through a speaker (not shown).

  On the other hand, when an operation by the hands-free system is instructed by the user, the mobile phone unit 5 receives from the car navigation device 3 received by the wireless transmission / reception unit 6 instead of the operation by the operator of the mobile phone 4. The line is connected in response to the control command, and the line is connected by notifying the car navigation device 3 of an incoming call or the like via the wireless transmission / reception unit 6. When the line is further connected, instead of the voice acquired from the microphone, the voice based on the voice data received by the wireless transmission / reception unit 6 is sent to the call target, and the voice obtained from the call target is wirelessly transmitted by the voice data. Output to the transceiver 6.

  The wireless transmission / reception unit 6 is a data communication means based on IEEE (The Institute of Electrical and Electronics Engineers, Inc.) 802.11x, Bluetooth, etc., and transmits various data output from the mobile phone unit 5 to a car audio device. 2 and various data output from the car audio device 2 are received and output to the mobile phone unit 5. As a result, the cellular phone 4 connects a line by control by data communication with an external device, and further transmits / receives voice data related to a call to / from the external device, and configures a hands-free system with the external device. It has been made possible.

  On the other hand, the car audio device 2 provides the user with an audio signal of content desired by the user. In addition, the voice guidance by the car navigation device 3 and the voice by the voice data are provided to the user. In addition, by voice communication with the mobile phone 4, instead of these voices, the voice of the call target received by the mobile phone 4 is output from the speakers 7 F and 7 R, thereby constituting the voice output means of the hands-free system. To do.

  That is, in this car audio device 2, the tuner unit 8 switches its operation under the control of the main body unit 9, receives a radio broadcast, and outputs an audio signal. The disk unit 10 is composed of an optical disk device, a magnetic disk device, and the like, and switches its operation under the control of the main body unit 9 to reproduce and output audio signals of various music contents.

  The communication unit 11 sends and receives various data to and from the car navigation device 3 and outputs it to the main body unit 9. The wireless transmission / reception unit 12 is a data communication unit corresponding to the wireless transmission / reception unit 6 of the mobile phone 4, transmits / receives various data to / from the mobile phone 4, and inputs / outputs these various data to / from the main body unit 9. To do.

  The main body 9 includes a controller that controls the car audio device 2, a drive circuit that drives speakers 7F and 7R disposed on the front seat door and the rear seat door of the vehicle according to the in-vehicle system 1, and driving of the drive circuit. It is formed by an audio signal processing circuit or the like that processes an audio signal to be used. The main unit 9 switches its operation in response to a control command input from the car navigation device 3 via the communication unit 11, and an audio signal output from the tuner unit 8 when reception of a radio broadcast is instructed by the user. To drive the speakers 7F and 7R. When the user gives an instruction to listen to the content recorded on the disc unit 10, the speakers 7 </ b> F and 7 </ b> R are driven by an audio signal reproduced on the disc unit 10.

  When the car navigation device 3 outputs a voice guide and voice data related to other contents, the speakers 7F and 7R are driven by a voice signal based on the voice data. As a result, the in-vehicle system 1 is configured to be able to enjoy content from radio broadcasts and various recording media, and to listen to content and audio guides from the car navigation device 3.

  On the other hand, when various data such as incoming calls are input from the mobile phone 4 via the wireless transmission / reception unit 12, the data is output to the car navigation device 3 via the communication unit 11. Further, the response of the car navigation device 3 by the notification of the data, and further, the response and data input via the communication unit 11 are transmitted to the mobile phone 4 via the wireless transmission / reception unit 12 with respect to the data related to the control such as calling. Notice. As a result, the in-vehicle system 1 is configured such that operations related to various calls can be executed by operating the car navigation device 3.

  Further, when a call is started with a call target through such a series of processes, the driving of the speakers 7F and 7R by the audio signals of various contents is stopped by the control of the car navigation device 3, and the wireless transmission / reception unit 12 is used. The speakers 7F and 7R are driven by the voice data to be communicated output from the mobile phone 4. In addition, voice data input from the car navigation device 3 via the communication unit 11 is transferred to the mobile phone 4 via the wireless transmission / reception unit 12 and transmitted to the call target.

  In this way, the speakers 7F and 7R are driven by various sound sources, and the main body 9 changes the volume and sound quality in response to the control command output from the car navigation device 3.

  Corresponding to the configuration of the car audio device 2 and the like, the car navigation device 3 executes various processes related to navigation by operating an operator provided on the operation panel, operating a remote commander, and inputting voice by the microphone 13. At the same time, the operation of the car audio device 2 and the mobile phone 4 is controlled.

  In other words, in the car navigation device 3, a GPS (Global Positioning System) unit 15 detects the current position under the control of the navigation main unit 19 and notifies the navigation main unit 19. The monitor unit 17 displays a map or the like used for route guidance under the control of the navigation body unit 19. The microphone 13 acquires the user's voice related to the voice input of the car navigation device 3 and further acquires the user's voice related to the hands-free system. The communication unit 18 transmits / receives various data to / from the car audio device 2 under the control of the navigation main body 19, and inputs / outputs data related to the transmission / reception to / from the navigation main body 19.

  The navigation main body 19 includes arithmetic processing means for executing a series of programs, recording means for storing map data to be displayed on the monitor 17, moving image data and the like, an acceleration sensor, and the like. Furthermore, the operation of each unit is controlled by the operation of the operation unit provided on the operation panel and the remote commander, and the processing related to navigation is executed. That is, the user's voice obtained from the microphone 13 is analyzed to detect the user's instruction, and by this instruction and further by operation of the operation panel provided on the operation panel and the remote commander, the user can obtain a map related to navigation. When the display is instructed, a corresponding map or the like is displayed by the monitor unit 17. Similarly, a destination set by the user is accepted and a route to this destination is searched. Furthermore, the user is guided to this destination based on the current position detected by the GPS unit 15. In this process, voice data related to a voice guide that instructs a left turn, a right turn, or the like is output to the car navigation device 3 via the communication unit 18.

  On the other hand, when the user loads a DVD optical disk and instructs playback, the DVD is played and a moving image based on moving image data is displayed on the monitor unit 17, and the corresponding audio data is transferred to the car audio device 2. The entire operation is controlled so as to be output from the speakers 7F and 7R. On the other hand, when the user instructs the operation of the car audio device 2, in accordance with this instruction, the car audio device 2 is instructed to receive a radio broadcast, reproduce the content recorded on the disc unit 10, and the like.

  When the user instructs a call using the hands-free system, various control commands and responses are transmitted / received to / from the mobile phone 4 via the car audio device 2, thereby connecting the line. When a call is started after the line is connected, the car audio device 2 drives the speakers 7F and 7R with the audio data of the call target obtained from the mobile phone 4 instead of the audio of the content by radio broadcasting and various recording media. To instruct. In addition, the user's voice acquired by the microphone 13 is output to the car audio device 2 as voice data, and the voice by the microphone 13 is sent to the call target. In addition, when such a call is finished, an instruction to block the line is given.

  As a result, in the in-vehicle system 1, the target voice is provided to the user by the speakers 7 </ b> F and 7 </ b> R of the car audio device 2, and the user's voice acquired by the microphone 13 related to the voice input of the car navigation device 3 is targeted. Sending out and making up a hands-free system.

  When the car audio apparatus 2 provides various types of audio through the speakers 7F and 7R in the car audio device 2, the navigation main body 19 uses the volume corresponding to the operation of the volume adjustment operator provided on the operation panel or the remote commander. The output volume is set, and the sound of these contents is output according to the volume according to the user's instruction.

  On the other hand, when a call is made using the hands-free system, the volume of the voice related to the call provided by the speakers 7F and 7R is varied according to the amount of noise. As a result, the in-vehicle system 1 makes it possible to clearly hear the voice to be called even while traveling.

  The navigation main body 19 detects the amount of noise used for such volume control by detecting the output signal level from the microphone provided for noise detection, and if the amount of noise increases as a result of this detection, In order to increase the sound output from the speakers 7F and 7R, a volume control command is output to the car audio device 2, and thereby the sound volume related to the call provided by the speakers 7F and 7R according to the amount of noise. Is variable.

  That is, FIG. 1 is a flowchart showing a processing procedure related to volume control by the navigation main body 19. When the power is turned on by the user, the navigation main body 19 starts this processing procedure and moves from step SP1 to step SP2. The operation of each part is started by the setting at the time of the last power-down by the so-called last memory method. As a result, the operation of the car audio device 2 is set so that the sound is output from the speakers 7F and 7R according to the setting at the time when the power is turned off immediately before.

  When the operation is started in this way, the navigation main body 19 moves to step SP3, where it is determined whether or not the user has instructed to change the volume, and if an affirmative result is obtained here, step SP3 to step SP4. Then, after outputting a control command to the car audio device 2 so that the volume is instructed by the user, the process proceeds to step SP3. Thereby, in this in-vehicle system 1, when the sound of various contents is provided to the user, the volume output from the speakers 7F and 7R is set according to the volume adjustment by the user.

  On the other hand, if a negative result is obtained in step SP3, the navigation main body unit 19 proceeds from step SP3 to step SP5, and determines whether or not a call is instructed by the mobile phone 4 by the user. If a negative result is obtained here, the navigation main body 19 returns from step SP5 to step SP3. On the other hand, when a positive result is obtained in step SP5, the process proceeds to step SP6, where the amount of noise is detected by detecting the output signal level from the microphone provided for noise detection. In the subsequent step SP7, the car audio device 2 is instructed to change the volume of the audio data so that the signal level of the audio data increases in proportion to the detected noise amount.

  In the following step SP8, it is determined whether or not the user has instructed the end of the call. If a negative result is obtained here, the process returns to step SP6, whereas if a positive result is obtained, the process proceeds to step SP9. After returning the speaker output volume to the volume just before the start, the process returns to step SP3.

(2) Operation of Embodiment In the above-described configuration, in the in-vehicle system 1, listening to content recorded on a radio broadcast or a recording medium by operating an operation panel or an operator provided on a remote commander or by voice input. When the user designates the source, the car audio device 2 is controlled by the car navigation device 3 to select the sources 8 and 10 related to the content instructed by the user. Is driven. Thereby, in this in-vehicle system 1, the sound of the content desired by the user is provided from the speakers 7F and 7R. In addition, when the user instructs a process related to the car navigation device 3 through the same operation, the corresponding process is executed by the car navigation device 3, and in the audio guide related to the navigation process, the audio related to this audio guide is displayed. Data is transmitted from the car navigation device 3 to the car audio device 2 via the communication units 18 and 11, and is supplied to the speakers 7F and 7R by the main body unit 9. When the user instructs playback of the DVD, the DVD image is displayed on the monitor unit 17 and the corresponding audio data is transferred to the car audio device 2 and output from the speakers 7F and 7R.

  On the other hand, when the user sets the mobile audio device 2 and the car navigation device 3 so as to form a hands-free system of the mobile phone 4 and the mobile phone 4 receives an incoming call, An incoming call is notified to the car audio device 2 via the wireless transmission / reception unit 6, and a ringing tone is output from the speakers 7 </ b> F and 7 </ b> R, and an incoming call is notified from the car audio device 2 to the car navigation device 3. In response to the notification of the incoming call, a user operation in the car navigation device 3 notifies the mobile phone 4 of an instruction related to the incoming call from the car navigation device 3 via the car audio device 2. A series of processes related to is executed. As a result, a line is connected to the call target related to the incoming call, and the call becomes possible. On the other hand, when a call is instructed by a user who possesses the mobile phone 4, the car navigation device 3 notifies the mobile phone 4 of an instruction related to the call via the car audio device 2. As a result, a series of processing relating to calling and line connection is executed by the mobile phone 4, whereby the line is connected to the desired call target and communication is possible.

  When a call can be made by the hands-free system in this way, the voice data of the other party received by the mobile phone 4 is output to the car audio device 2, and the speakers 7F and 7R are driven by this voice data instead of the voice of the content. Thus, the voice of the other party is output from the speakers 7F and 7R. Further, the user's voice is acquired through the voice input microphone 13 in the car navigation device 3, and this voice is notified to the mobile phone 4 through the car audio device 2 by voice data. And transmitted from the mobile phone 4. As a result, a hands-free system of the mobile phone 4 is formed by using the voice input / output means in the car audio device 2 and the car navigation device 3, and it becomes possible to make a call with the call target by the hands-free system. .

  In this in-vehicle system 1, the provision of content is temporarily suspended in this manner, and the voice of the call target is provided to the user by the hands-free system. On the other hand, the voice to be called is provided to the user with a volume corresponding to the amount of noise detected by the noise detection microphone.

  In other words, when listening to content such as music while driving, there are many cases where the user listens vaguely, and there is a feature that does not matter even if the content is somewhat inaudible. In such contents, if the volume changes frequently, it becomes annoying and a sense of incongruity occurs. On the other hand, in a call using a mobile phone, the talk to be called is often listened to, and if it becomes difficult to hear due to noise, it is necessary to increase the volume. However, during operation, the volume control operator cannot be operated frequently.

  However, in this in-vehicle system 1, when the volume is controlled according to the detected amount of noise, and it becomes difficult to hear the voice of the call target due to noise, the volume is automatically increased and the listening is performed accordingly. Can be made easier. As a result, even when the vehicle is traveling, it is possible to clearly hear the voice to be called. Further, by executing the volume control based on such noise amount only during a call using the hands-free system, it is possible to prevent a sense of discomfort when listening to content.

  In the in-vehicle system 1, noise is acquired by a noise detection microphone, and the amount of noise is detected based on the signal level of the noise. Thus, the amount of noise can be detected easily and reliably and used for volume control. it can.

(3) Advantages of the embodiment According to the above configuration, when providing audio by content, the audio is provided by the volume corresponding to the operation of the volume adjustment operator, and the audio is provided by the hands-free system. In this case, by providing the sound with a volume corresponding to the amount of noise, it is possible to prevent a sense of incongruity in listening to the content, and to clearly hear the sound of the call target even while traveling.

  Further, by controlling the volume according to the amount of noise according to the signal level of noise acquired by the microphone, the amount of noise can be detected easily and reliably and used for controlling the volume.

  FIG. 3 is a chart showing a volume table used for volume control. The in-vehicle system according to the second embodiment controls the volume of the car audio device 2 by the car navigation device 3 by using the volume table, so that the volume related to the call according to the amount of noise as described above with respect to the first embodiment. Is variable. In this embodiment, except that the configuration of the car navigation device 3 relating to the control of the sound volume is different, the configuration is the same as the in-vehicle system 1 of the first embodiment. The configuration will be described as appropriate.

  Here, the volume table is based on an increase / decrease value based on a predetermined reference volume, with respect to the increase / decrease in the amount of noise predicted according to the current position of the vehicle. It is a recorded table. In the example of FIG. 3, increase and decrease in volume are indicated by + and −, respectively. In this volume table, the amount of noise increases in the tunnel compared to when driving on a normal general road, so that the volume is increased by a value of 3 in the tunnel in terms of the amount of operation of the volume control operator. Has been recorded. Similarly, it is recorded that the volume is increased by values 3, 2, and 1 on highways, urban areas, and national roads, respectively, and that the volume is not increased on prefectural roads. In the suburbs, it is recorded that the sound volume is reduced by a value of 2 by reducing noise caused by other vehicles.

  In addition, in this volume table, the volume at which the voice related to the call can be clearly heard is recorded as an increase / decrease value based on a predetermined reference volume with respect to the increase / decrease in the amount of noise predicted according to the time zone. The That is, in the example of FIG. 3, it is recorded that the volume is decreased by the value 1 in the early morning time zone (4: 00 to 7:00), and in the subsequent time zone (7:00 to 10:00), the volume is recorded. Is increased by a value of 1, and in the midnight time zone (1:00 to 4:00), it is recorded that the volume is decreased by a value of 2.

  In this embodiment, the volume table is created in the car navigation device 3 with each item set by the user. In addition, by accepting the operation of the volume adjustment operator during a call, by detecting a change in the volume by the user during the call and by sequentially correcting this volume table, a so-called learning function is provided to provide this volume table. It may be constructed and modified.

  FIG. 4 is a flowchart showing a processing procedure related to volume control of the navigation main body 19 using this volume table. The navigation main body 19 executes the processing procedure shown in FIG. 4 instead of the processing procedures of step SP6 and step SP7 in the processing procedure of FIG.

  In other words, when the navigation main body 19 starts the processing procedure shown in FIG. 1 and the user instructs a call, the navigation main body unit 19 moves from step SP5 to the processing procedure shown in FIG. 4, and from step SP11 to step SP12. Here, the navigation main body 19 acquires information on the current position from the GPS unit 15. In the subsequent step SP13, the map data held by the current position information is searched to detect which category the current position belongs to in the volume table. Further, the corresponding section of the volume table is searched based on the detection result, thereby detecting the volume at the current position.

  In subsequent step SP14, the current time is detected by a built-in timer. In subsequent step SP15, the volume table is searched based on the current time, and the volume in the time zone to which the current time belongs is detected. In the following step SP16, the navigation main body 19 determines the final volume by adding the current volume detected in this way and the volume based on the current time to the reference volume, so that the final volume is obtained. In subsequent step SP16, a control command is sent to the car audio apparatus 2. In the following step SP18, this processing procedure is ended, and the process proceeds to step SP8 in FIG.

  According to this embodiment, by controlling the volume based on the current position detected by the current position detecting means, the volume of the sound output from the speaker is varied according to the amount of noise that changes depending on the current position, for example, tunneling When the noise increases due to entering the inside, the volume can be increased correspondingly, and the same effect as in the first embodiment can be obtained.

  Further, by correcting the sound volume based on the current position based on the current time, the sound volume can be controlled more finely and the voice of the call target can be heard clearly.

  In this embodiment, the sound volume is controlled by the vehicle speed and the weather instead of the sound volume control by the current position described in the second embodiment. In this embodiment, except that the configuration of the car navigation device 3 relating to the control of the volume is different, the same configuration as the in-vehicle system of the embodiment 2 is used. In the following description, in FIG. The configuration will be described as appropriate.

  That is, the navigation main body 19 in the car navigation device 3 of this in-vehicle system is formed so that a vehicle speed pulse is inputted from the vehicle, and is formed so that the current speed can be detected by this vehicle speed pulse. Further, the present weather can be detected by a sensor provided in the vehicle or by acquiring information connected to the Internet or the like by a built-in wireless communication means.

  FIG. 5 is a flowchart showing a processing procedure relating to the volume control of the navigation main body 19 depending on the vehicle speed and the weather. The navigation main body 19 executes the processing procedure shown in FIG. 1 instead of the processing procedures of step SP6 and step SP7 in the processing procedure of FIG.

  In other words, when the navigation main body 19 starts the processing procedure shown in FIG. 1 and the user instructs a call, the navigation main body portion 19 moves from step SP5 to the processing procedure shown in FIG. 5, and from step SP21 to step SP22. Here, the navigation main body 19 detects the current vehicle speed based on the vehicle speed pulse, and in subsequent step SP23, detects the volume at which the voice to be talked can be clearly heard against the noise due to the current vehicle speed. Detects the volume of sound.

  In the subsequent step SP24, the current weather is detected by the sensor or the wireless communication means, and in the subsequent step SP25, the volume is corrected by the current weather according to the vehicle speed. That is, in rainy weather, vehicle-mounted noise becomes larger than when it is fine. As a result, the navigation main body 19 corrects the volume based on the vehicle speed according to the current weather so as to compensate for the noise in the vehicle that increases or decreases depending on the weather.

  In the subsequent step SP26, the navigation main body 19 adds the volume detected in this way to the reference volume to determine the final volume, and sets the final volume in the car audio device 2 so as to obtain this final volume. Send a control command. In subsequent step SP27, the processing procedure is terminated, and the process returns to step SP8 in FIG.

  According to this embodiment, the volume is varied based on the vehicle speed, and thereby the volume of the sound output from the speaker is varied according to the amount of noise that varies depending on the vehicle speed, for example, the vehicle speed increases and noise increases. In some cases, the volume can be increased by that amount, whereby the same effect as in the first embodiment can be obtained.

  Further, by correcting the volume based on the vehicle speed according to the weather, it is possible to control the volume more finely and clearly hear the voice of the call target.

  In this embodiment, in the configuration of the above-described first to third embodiments, when the volume of the communication partner output from the speakers 7F and 7R increases, the driving of the rear speaker 7R is stopped. As a result, a plurality of speakers are selected according to the amount of noise, and the voice to be talked is output.

  As a result, in this embodiment, by selecting a plurality of speakers according to the amount of noise and outputting the voice to be talked, when the amount of noise increases, the voice to be spoken can be heard more clearly. It is made to be able to.

  In the above-described embodiment, the case where the volume is controlled based on the noise detected by the microphone, the current position, and the like has been described. However, the present invention is not limited to this, and the configurations of the above-described Embodiments 1-4 may be used as necessary. You may make it implement in combination.

  Further, in the above-described embodiment, the case where the car navigation device and the car audio device are configured separately has been described, but the present invention is not limited to this, and the case where the car navigation device and the car audio device are configured integrally. Can also be widely applied.

  In the above-described embodiment, the case where the hands-free system is formed by the car audio device and the car navigation device has been described. However, the present invention is not limited to this, and the case where the hands-free system of the mobile phone is formed by a dedicated device. Can also be widely applied.

  The present invention can be applied to, for example, a car audio device and a car navigation device that can form a hands-free system.

It is a flowchart which shows the process sequence of the navigation main-body part in the car navigation apparatus which concerns on Example 1 of this invention. It is a block diagram which shows the vehicle-mounted system which concerns on Example 1 of this invention. It is a graph which shows the volume table in the car navigation apparatus which concerns on Example 2 of this invention. It is a flowchart which shows the process sequence of the navigation main-body part in the car navigation apparatus which concerns on Example 2 of this invention. It is a flowchart which shows the process sequence of the navigation main-body part in the car navigation apparatus concerning Example 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... In-vehicle system, 2 ... Car audio apparatus, 3 ... Car navigation apparatus, 4 ... Mobile phone, 5 ... Mobile phone part, 6, 12 ... Wireless transmission / reception part, 7F, 7R ... Speaker, 13 ……Microphone

Claims (8)

Instead of driving the speaker by voice output from the source in response to a call instruction from the user, the speaker is driven by voice data acquired by a mobile phone, and voice data acquired by a microphone is sent to the mobile phone. By outputting, an in-vehicle device forming a hands-free system of the mobile phone,
Volume control controls,
Control means for varying the volume output from the speaker,
The control means includes
When driving the speaker by an audio signal output from the source, in response to the operation of the volume adjustment operator, set the volume of the audio output from the speaker,
When the speaker is driven by sound data acquired by the mobile phone, the volume of sound output from the speaker is varied according to the amount of noise. The control means includes
The in-vehicle device according to claim 1, wherein the amount of noise is detected based on a signal level of noise acquired from a microphone. Having a current position detecting means for detecting the current position;
The control means includes
By varying the volume of the sound output from the speaker based on the current position detected by the current position detecting means, the volume of the sound output from the speaker is varied according to the amount of noise that varies depending on the current position. The in-vehicle device according to claim 1. The control means includes
The volume of the sound output from the speaker is varied according to the amount of noise that varies depending on the vehicle speed by varying the volume of the sound output from the speaker based on the vehicle speed. In-vehicle device. The control means includes
The in-vehicle device according to claim 3, wherein a volume based on the current position is corrected based on a current time. The control means includes
The in-vehicle device according to claim 3, wherein a sound volume based on the current position is corrected according to weather. A plurality of the speakers are provided,
The control means includes
The method according to claim 1, wherein when the speaker is driven by audio data acquired by the mobile phone, the plurality of speakers are selected and driven by the audio data according to the amount of noise. In-vehicle device. Instead of driving the speaker by voice output from the source in response to a call instruction from the user, the speaker is driven by voice data acquired by a mobile phone, and voice data acquired by a microphone is sent to the mobile phone. A method of controlling an in-vehicle device that forms a hands-free system for the mobile phone by outputting,
When driving the speaker with an audio signal output from the source, in response to the operation of the volume adjustment operator, set the volume of the audio output from the speaker,
When the speaker is driven by audio data acquired by the mobile phone, the volume of audio output from the speaker is varied according to the amount of noise.

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