JP4996423B2 - In-vehicle acoustic device and control method for in-vehicle acoustic device - Google Patents

Description

  The present invention relates to a vehicle-mounted acoustic device that is mounted on a vehicle and reproduces music, and a method for controlling the vehicle-mounted acoustic device.

2. Description of the Related Art Conventionally, an in-vehicle audio device that is mounted on a vehicle and reproduces music or the like recorded on a music CD or hard disk and emits the music from a speaker is known (see Patent Document 1). The driver of the vehicle can enjoy driving while listening to the music flowing from the speaker by using the in-vehicle acoustic device.
JP 2005-153659 A

However, in the case of a conventional in-vehicle acoustic device, when the tune of the music being played is, for example, a tune with a fast tempo, the driver feelings of the music is uplifted, and the speed tends to increase accordingly. And the driver may be unaware that the vehicle should be too fast.
The present invention has been made in view of the above-described circumstances, and makes the driver aware that the speed of the vehicle should be increased too much, and the speed of the vehicle is excessively increased due to the music being reproduced. It is an object of the present invention to provide an in-vehicle acoustic device capable of preventing the above.

In order to achieve the above object, the present invention provides a vehicle speed detecting means for detecting the speed of a vehicle, an occupant detecting means for detecting the presence or absence of an occupant other than a driver, and the occupant When it is detected by the detection means that there is no occupant other than the driver, and when playing an up-tempo tune, the speed detected by the vehicle speed detection means and the set reference speed Depending on the comparison result, the music to be played is changed to a music having a different tone from the uptempo, and the passenger detection means detects that there is an occupant other than the driver. and a reproduction control means for inhibiting change, the reproduction control means, the speed limit of the roadway on which the vehicle is traveling, or obtainable configured the type of road on which the vehicle is traveling Is a speed detected by the vehicle speed detecting means, when compared with the reference speed, the speed limit of the acquired roadway, or, and sets the reference speed according to the type of roadway.
Here, the reference speed is a speed that the driver should pay attention to when the vehicle speed is too high when the vehicle speed exceeds the reference speed.
According to this configuration, the reproduction state of the music is changed according to the comparison result between the vehicle speed and a predetermined reference speed, and the driver increases the vehicle speed by changing the reproduction state. In addition to noticing that you should be careful too much, the driver's mood will calm down even if the song being played is a song that makes the driver feel uplifted, so the driver will be too fast Is prevented.

Here, in the on-vehicle acoustic device according to the invention, the reproduction control unit may change the music to a music having a different tone from that of the music being played.
According to this configuration, according to the comparison result between the speed of the vehicle and a predetermined reference speed, the music being played is changed to a music with a different tone from that of this song. With this change in playback state, the driver realizes that the driver should be aware of the excessive speed of the vehicle, and the music being played is a song that has a tone that raises the driver's mood. Even if it exists, the driver feels calm, and the driver is prevented from speeding up too much.

In the in-vehicle acoustic device of the above invention, the reproduction control unit may change the tune of the music being reproduced to a tune different from the tune.
According to this configuration, the reproduction state is changed such that the tone of the music being reproduced is changed according to the comparison result between the vehicle speed and a predetermined reference speed. Because the driver notices that the speed of the vehicle is too high, and even if the music being played is a song that has a tone that makes the driver feel uplifted, the driver feels calm The driver is prevented from speeding up too much.

In the in-vehicle audio apparatus according to the invention, the reproduction control unit may stop the reproduction of the music.
According to this configuration, the reproduction state is changed such that the reproduction of the music is stopped in accordance with the comparison result between the vehicle speed and a predetermined reference speed, and the driver changes the reproduction state. The driver should be aware of the speed of the vehicle, and even if the song being played is a song that raises the driver's mood, the driver can listen to this song. Disappears. Therefore, the driver feels calm and the driver is prevented from excessively increasing the speed of the vehicle due to the reproduction of music.

In the in-vehicle audio apparatus according to the invention, the reproduction control unit may attenuate the volume of the music being reproduced.
According to this configuration, the reproduction state is changed such that the volume of the music is attenuated in accordance with the comparison result between the vehicle speed and a predetermined reference speed. However, even if the song being played is a song that enhances the driver's mood, the effect of raising the mood of the song Reduced. Therefore, the driver feels calm and the driver is prevented from excessively increasing the speed of the vehicle due to the reproduction of music.

In the in-vehicle acoustic device according to the invention, the control unit may change the reproduction state of the music piece when the music piece having a specific music tone is being reproduced.
In particular, the specific tune may be an up-tempo tune.
According to this configuration, even if the tune of the music being played is an up-tempo tune and the driver's mood is raised, the driver's mood is calmed down by changing the playback state of the music. This prevents the driver from increasing the speed of the vehicle too much.
Furthermore, according to this configuration, since the music playback state is not changed except for a specific music tone such as an up-tempo music tone, the music tone of the music being played enhances the driver's mood. However, it is prevented that the driver does not change the reproduction state of the music in a meaningless manner even though the driver does not increase the speed of the vehicle due to the music.

The vehicle-mounted acoustic device according to the invention further includes an occupant detection unit that detects the presence or absence of an occupant other than the driver, and when the occupant detection unit detects that there is an occupant other than the driver, The change may be prohibited.
Here, if there is an occupant other than the driver, the occupant is more likely to warn and warn that the driver increases the speed of the vehicle too much. There is no need to calm down. According to the above configuration, when there is an occupant other than the driver, the reproduction state of the music is not changed, so that unnecessary processing is prevented from being executed.

In order to achieve the above object, the present invention is a control method for a vehicle audio apparatus for reproducing effortlessly songs, to detect the presence or absence of a passenger other than the driver, detects that no passenger other than the driver If the a and playing music of up-tempo melody case, to detect the speed of the vehicle, the detected vehicle speed, according to a result of comparison between the set criteria speed, a corresponding up-tempo melody When the music to be played is changed to a music with a different tone from that of the driver, if it is detected that there is an occupant other than the driver, the change of the music to be played is prohibited and the detected speed is compared with the reference speed. In this case, the speed limit of the roadway on which the vehicle is traveling or the type of roadway on which the vehicle is traveling is acquired, and the reference speed is set according to the acquired speed limit of the roadway or the type of roadway. characterized in that it

  According to the present invention, since the playback state of the music being played is changed according to the comparison result between the vehicle speed and a predetermined reference speed, the driver should be aware of excessive speed. In addition, the driver feels calm and the driver can be prevented from increasing the speed of the vehicle too much.

Embodiments of the present invention will be described below with reference to the drawings.
In the following description, as one aspect of the in-vehicle acoustic device, a music playback function is provided that includes a navigation function for performing vehicle route guidance and that plays back music based on music data recorded on a music CD, hard disk, or the like. The navigation apparatus 10 provided is illustrated.
FIG. 1 is a block diagram showing a functional configuration of a navigation device 10 according to the present embodiment. As shown in this figure, the navigation device 10 includes a GPS (Global Positioning System) unit 11, a gyro unit 12, a vehicle speed detection unit 13 (vehicle speed detection unit), an occupant detection unit 14 (occupant detection unit), and an FM. Reception unit 15, display unit 16, input unit 17, user interface unit 18, control unit 20, CD control unit 22, DSP 23, D / A converter 24, HDD control unit 25, and communication control Part 27.

The GPS unit 11 receives GPS radio waves from GPS satellites via the GPS antenna 11A, obtains the position coordinates indicating the current location of the vehicle and the traveling direction from the GPS signals superimposed on the GPS radio waves, and calculates the GPS. Date / time information (year, month, day, hour, minute, etc.) at the current location of the vehicle is obtained by calculation from the date / time information included in the signal and the time difference between the current location of the vehicle and the information is output to the control unit 20.
The gyro unit 12 detects the relative azimuth of the vehicle with a gyro sensor and outputs it to the control unit 20.
The vehicle speed detector 13 obtains the vehicle speed by calculation based on the vehicle speed pulse of the vehicle, and outputs the vehicle speed to the controller 20.
The occupant detection unit 14 outputs a signal indicating whether there is an occupant other than the driver to the control unit 20 based on the output signal of the weight sensor arranged under each seat of the vehicle. The control unit 20 determines whether there is an occupant other than the driver in the vehicle based on the signal input from the occupant detection unit 14. In addition, it is good also as a structure which determines the presence or absence of a passenger | crew using the sensor which detects the presence or absence of wearing of a seatbelt, the sensor which detects the presence or absence of opening and closing of a door other than a weight sensor, for example.

The FM receiver 15 receives an FM multiplex broadcast wave via the FM antenna 15A, acquires traffic information (VICS (Vehicle Information and Communication System) information) superimposed on the FM multiplex broadcast wave, and performs predetermined processing. To the control unit 20.
For example, a liquid crystal display device with a touch panel is applied to the display unit 16, and various information is displayed under the control of the control unit 20.
The input unit 17 includes an operation detection unit that detects operations of various operators and a touch panel included in the navigation device 10, a reception unit that receives a transmission signal from a remote controller (not shown), and the like. An instruction is output to the control unit 20.
The user interface unit 18 is an I / O control circuit, a driver, or the like, and is an interface that connects the display unit 16 and the input unit 17 to the control unit 20.

  The control unit 20 controls the entire navigation device 10 and is composed of a CPU and its peripheral circuits. The CPU reads various data such as a control program stored in the ROM 30 and inputs it via the input unit 17. In response to the received user instruction, control processing of each unit of the navigation device 10 is performed. The DRAM 31 is a memory used for the work area of the CPU, and the SRAM 32 is a volatile memory. The DRAM 31 is backed up by a battery or the like while the main power source of the apparatus such as a vehicle accessory power source is off. Memory contents are to be retained. The VRAM 33 is a memory in which display data for the display unit 16 is stored.

The CD control unit 22 controls the CD playback device 21 included in the navigation device 10 under the control of the control unit 20, and reads data related to the music recorded on the music CD inserted in the CD playback device 21. Then, the read signal is output to the DSP 23. At the same time, the CD control unit 22 reads TOC (Table Of Contents) information of the music recorded on the CD, and outputs a signal indicating the TOC information to the control unit 20.
The DSP 23 performs signal processing of the signal input from the CD control unit 22 under the control of the control unit 20 and outputs the signal to the D / A converter 24. In this configuration, the audio data signal processing by the DSP 23 includes audio data compression / demodulation processing.
The D / A converter 24 performs digital / analog conversion on the audio data input from the DSP 23 and sequentially outputs it to the speaker 24A.

Under the control of the control unit 20, the communication control unit 27 accesses an information center and the Internet via a wireless communication device 28 (for example, a mobile phone) connected to the navigation device 10, and performs various types via a wireless communication network. Receive information. Via the communication control unit 27, the control unit 20 transmits data related to the music such as the song name, artist name, tone, genre, etc. (hereinafter referred to as “music related data”) from the external server. Can be acquired.
The HDD control unit 25 controls the HDD 26 under the control of the control unit 20, and records and reads data on and from the HDD (Hard Disk Drive) 26. Further, the HDD control unit 25 cooperates with the CD control unit 22 in accordance with a user instruction input via the input unit 17, and stores data related to the music recorded on the CD inserted in the CD playback device 21. Data is stored in the HDD 26 so as to be reproducible. When storing the music data in the HDD 26, the control unit 20 acquires the TOC information related to the music data, acquires the music related data based on the TOC information via the communication control unit 27, and acquires the acquired music related data. Data is stored in the HDD 26.
The HDD 26 is a device that stores various data in a readable and writable manner, and stores a map database 35 in which information related to roads, place names, buildings, and the like of an electronic map displayed on the display unit 16 is stored. The HDD 26 stores a music database 36 for storing TOC information and music related data in association with each other.

FIG. 2 is a diagram schematically illustrating an example of the music database 36.
As shown in this figure, one record of the music database 36 includes a TOC information field 40, a music title field 41, an artist name field 42, a music tone field 43, and a genre field 44.
The TOC information field 40 stores TOC information data which is data indicating TOC information uniquely determined for each piece of music data.
The song name field 41 stores song name data, which is data indicating the song name of the song.
The artist name field 42 stores artist name data that is data indicating the name of a singer who sings a song, the name of a band performing the song, and the like.

The tune field 43 stores tune data, which is data indicating the tune of the music. In the present embodiment, in this tune field, “up tempo” data indicating the tune (up tempo) of a relatively fast tempo and “slow tempo” indicating the tune (slow tempo) of a relatively slow tempo. Any of the data is stored.
The genre field 44 stores genre data, which is data indicating the genre of music, such as hard rock, classic, pop, and heavy metal.
In the present embodiment, the data stored in each field of the music database 36 can be acquired from the external server via the communication control unit 27 as described above, and the user can directly acquire the data via the input unit 17. Can be entered. Therefore, for example, even when the music tone data cannot be acquired for a certain record, the user determines whether the music is up-tempo or slow-tempo, and inputs based on this determination. The music tone data of the corresponding music can be input via the unit 17.

  By the way, when the driver of the vehicle plays the music CD using the navigation device 10 and drives while listening to the music, the music being played is like a music with a fast tempo. In the case of music that makes the music rise, there is a possibility that the driver's mood will be raised and the speed of the vehicle will be increased. In view of this, the navigation device 10 according to the present embodiment is based on the vehicle speed and a reference speed described later, specifically, when the vehicle speed exceeds the reference speed, the playback state of the music being played back This makes it possible for the driver to notice that the vehicle speed should be excessive, to calm the driver's mood, and to suppress an increase in the vehicle speed. Hereinafter, the operation of the navigation device 10 will be described in detail using a flowchart.

FIG. 3 is a flowchart showing the operation of the navigation device 10. For convenience of explanation, in the following explanation, it is assumed that the navigation device 10 is mounted on a vehicle and that the vehicle is running while playing a music CD using the navigation device 10. In the following description, the control unit 20 functions as a reproduction control unit.
In step SA1, the control unit 20 determines whether there is an occupant other than the driver in the vehicle based on the signal input from the occupant detection unit 14 (step SA1). When there is an occupant other than the driver (step SA1: YES), the control unit 20 ends the process without changing the reproduction state of the music being reproduced. This is because when there is an occupant other than the driver and the driver increases the speed of the vehicle, there is a high possibility that the occupant warns the driver.

When there is no occupant other than the driver (step SA1: NO), the control unit 20 determines whether or not the music currently being played is a music that enhances the driver's mood (step SA2).
Here, the operation of step SA2 will be described in detail. In general, it can be said that music with a fast tempo (up tempo music) is music that enhances the driver's mood compared to music with a slow tempo (slow tempo music). Therefore, in the present embodiment, the control unit 20 acquires the TOC information of the music being played, and refers to the music tone field of the music database 36 based on the TOC information. When “up tempo” data is stored in the tune field, it is determined that the song being played is a song that enhances the driver's mood, and when “slow tempo” data is stored, It is determined that the music being played is music that calms the driver.
In step SA2, if the music being played is not a music that raises the driver's mood (step SA2: NO), the driver's mood when listening to the music being played is raised and the speed of the vehicle is increased. Since no situation occurs, the control unit 20 ends the process without changing the playback state of the music being played.

On the other hand, when the music being played is music that enhances the driver's mood (step SA2: YES), the control unit 20 determines whether or not map matching is currently being performed (step SA3). Here, the map matching is based on signals output from the GPS unit 11, the gyro unit 12, and the vehicle speed detection unit 13 to calculate the position and traveling direction of the host vehicle, and uses a map database 35 stored in the HDD 26. Thus, route guidance is performed on the map displayed on the display unit 16. In step SA3, it is determined whether or not the mapping is being performed. If the mapping is not being performed, the control unit 20 cannot obtain the current vehicle speed, the speed limit of the road being traveled, and the like. This is because it cannot be determined whether or not the reproduction state changing process should be performed.
When map matching is not in progress (step SA3: NO), the control unit 20 ends the process. On the other hand, when the map matching is being performed (step SA3: YES), the control unit 20 acquires the current vehicle speed based on the signal input from the vehicle speed detection unit 13 (step SA4). And the control part 20 performs the reference speed acquisition process which is a process which acquires a reference speed (after-mentioned) (step SA5). Here, the reference speed acquisition process will be described with reference to the flowchart of FIG.

  When the vehicle speed exceeds the reference speed, the reference speed is a speed that the driver should pay attention to when the vehicle speed is increased too much. For example, the reference speed is 5 speeds per hour from the speed limit of the road on which the vehicle is traveling. Kilo low speed is defined. In this embodiment, when the speed of the vehicle reaches the reference speed, if the speed of the vehicle further increases, the speed of the vehicle approaches the speed limit, and if the speed increases further, the speed limit may be exceeded. Therefore, the playback state of the music being played is changed (to be described later) in order to promote suppression of an increase in the speed of the vehicle.

  In the navigation device 10 according to the present embodiment, the user can set how to determine the reference speed by operating the input unit 17 while referring to the display unit 16. Specifically, the user operates the input unit 17 while the vehicle is stopped, and displays the reference speed setting screen shown in FIG. 5 on the display unit 16. This reference speed setting screen is an example of a screen displayed when setting the reference speed, and is configured to be operated by a touch panel operation. After the display of the screen, the user operates the input unit 17 on the touch panel to check the check box A or the check box B shown in FIG. The check box A is a check box that is checked when the reference speed is determined based on the speed stored in the map database 35 as the speed limit of the currently traveling roadway. In the present embodiment, when the check box A is checked, the control unit 20 acquires the speed limit of the currently traveling roadway from the map database 35, and sets a value 5 kilometers per hour lower than the acquired speed limit. Determined as the reference speed. Needless to say, this reference speed can be determined according to the specifications of the navigation device 10, for example, not only a value 5 km / h lower than the speed limit but also a value 3 km / h lower, for example.

  The check box B is a check box that is checked when the user sets a reference speed. When this check box B is checked, the user further determines a reference speed for each intercity highway, city highway, national road, and prefectural road. For example, when an intercity highway is determined, the reference speed is set by operating the button 50 or the button 51 on the touch panel to raise or lower the reference speed displayed on the reference speed display unit 52. In this manner, the reference speed is determined for each intercity highway, city highway, national road, and prefectural road by the user's operation. When the check box B is checked, the control unit 20 determines whether the currently driven roadway is an intercity highway, an urban highway, a national road, or a prefectural road based on the map database 35. And a reference speed determined for each type of road is acquired. If the currently traveling roadway does not correspond to any of the above-mentioned roadway types, the control unit 20 acquires the speed limit of the roadway from the map database 35, and is a value that is 5 kilometers per hour lower than the acquired speed limit. Is defined as the reference speed.

In the reference speed acquisition process in step SA5, as shown in FIG. 4, the control unit 20 determines which of the check box A and the check box B is checked (SB1). When the check box A is checked (step SB1: “check box A”), the control unit 20 acquires the speed limit of the currently traveling roadway from the map database 35 (step SB2), and the acquired speed limit. Is obtained as a reference speed at a value 5 km / h lower (step SB3).
On the other hand, when the check box B is checked (step SB1: “check box B”), the control unit 20 determines that the currently running road is an intercity highway, an urban highway, a national road based on the map database 35. Which of the prefectural roads is determined (step SB4), and a value set by the user as the reference speed of the corresponding road type is acquired (step SB5). As described above, when the currently traveling roadway does not correspond to any of the above-described roadway types, the control unit 20 acquires the speed limit of the roadway from the map database 35, and from the acquired speed limit. A value that is 5 kilometers lower per hour is obtained as the reference speed.

Now, returning to FIG. 3 above, after acquiring the reference speed in the reference speed acquisition process of step SA5, the control unit 20 compares the current vehicle speed with the reference speed, and the vehicle speed exceeds the reference speed. It is determined whether or not (step SA6). If the vehicle speed does not exceed the reference speed (step SA6: NO), the controller 20 returns the process to step SA1 because there is no need to suppress an increase in the vehicle speed. On the other hand, when the speed of the vehicle exceeds the reference speed (step SA6: YES), the control unit 20 changes the playback state of the music being played back (step SA7) and ends the process. Here, the change of the reproduction state of the music being reproduced will be described in detail.
As described above, this change in the playback state makes the driver aware that the vehicle speed is too high, and also raises the mood of the driver who has listened to the music being played back. This is a process executed to suppress or prevent the increase of. Hereinafter, a specific mode of changing the reproduction state will be described with an example.

First, as an example of the change of the playback state, the music being played is changed to a music having a different tone from this music. For example, in the present embodiment, the up-tempo music is changed to the slow-tempo music. Specifically, the control unit 20 refers to the tune field 43 of the tune database 36, specifies, selects, and plays any one of the tunes whose “slow tempo” data is stored in the tune field 43. Change the music inside to this selected music.
By changing the playback state of the music in this way, the driver may notice that the driver should be careful about increasing the speed of the vehicle and calm down, so the driver may increase the speed of the vehicle too much. Is prevented. In particular, when changing an up-tempo song to a slow-tempo song, the driver is prevented from being uplifted by listening to the up-tempo song, and calming down by listening to the slow-tempo song, It is prevented that the driver increases the speed of the vehicle too much.

  In addition, as an example of changing the playback state, changing the tune of the music being played to a tune different from the tune. For example, in the present embodiment, for example, the tempo of the music being reproduced is lowered from the up tempo to the slow tempo by reducing the speed of the music. By changing the playback state of the music in this way, the driver may notice that the driver should be careful about increasing the speed of the vehicle and calm down, so the driver may increase the speed of the vehicle too much. Is prevented. In particular, when the up-tempo tune is changed to a slow tempo tune, the driver is prevented from being uplifted by listening to the up-tempo tune, and listening to the slow-tempo tune makes the mood calm and driving. It is prevented that the hand increases the speed of the vehicle too much.

  Further, as an example of the change of the reproduction state, stopping the reproduction of music can be mentioned. By changing the playback state of the music in this way, the driver may notice that the driver should be careful about increasing the speed of the vehicle and calm down, so the driver may increase the speed of the vehicle too much. Is prevented. In particular, in this embodiment, the change in the playback state of the music prevents the driver from listening to the up-tempo music, and the driver does not feel uplifted by listening to the music. You can feel calm and prevent the driver from speeding up the vehicle too much.

  Further, as an example of changing the playback state, it is possible to attenuate the volume of the music being played. By changing the playback state of the music in this way, the driver may notice that the driver should be careful about increasing the speed of the vehicle and calm down, so the driver may increase the speed of the vehicle too much. Is prevented. In particular, in this embodiment, the effect of raising the mood of the up-tempo song is reduced, the rise of the driver's mood is suppressed, the driver's mood is calm, and the driver increases the speed of the vehicle too much. Can be prevented.

As described above, according to the present embodiment, the current vehicle speed is compared with the reference speed, and in accordance with the comparison result, specifically, when the current speed exceeds the reference speed, , Change the playback state of the music. By changing the regeneration state, the driver notices that the speed of the vehicle should be increased too much, and the driver feels calm, so that the driver is prevented from increasing the speed of the vehicle too much.
Further, according to the present embodiment, first, as an example of changing the playback state, the music being played can be changed to a music having a different tone from this music. For example, in the present embodiment, changing an up-tempo song to a slow-tempo song can be mentioned. By changing the playback state of the music in this way, the driver may notice that the driver should be careful about increasing the speed of the vehicle and calm down, so the driver may increase the speed of the vehicle too much. Is prevented. In particular, when changing an up-tempo song to a slow-tempo song, the driver is prevented from being uplifted by listening to the up-tempo song, and calming down by listening to the slow-tempo song, It is prevented that the driver increases the speed of the vehicle too much.

In the present embodiment, as an example of changing the playback state, the music being played is changed to a music with a different tone from this music, and in particular, the up-tempo music is changed to a slow-tempo music. According to this, the driver notices that the driver should be careful not to increase the speed of the vehicle, and the driver is prevented from being uplifted by listening to the uptempo song, and Listening to slow-tempo music will calm you down and prevent the driver from over-speeding the vehicle.
In this embodiment, as an example of changing the playback state, the tune of the music being played is changed by changing the tune of the music being played to a tune different from this tune, in particular by reducing the speed of the music. According to this, the driver notices that the driver should be aware that the vehicle speed is too high and that the driver listens to the uptempo song. Thus, it is possible to prevent the mood from being raised, and by listening to the music with a slow tempo, the mood is calmed down and the driver is prevented from excessively increasing the speed of the vehicle.

Further, in the present embodiment, as an example of the change of the playback state, an example of stopping the playback of the music is given, but according to this, the driver should be aware that the speed of the vehicle is excessively increased, To calm down, the driver is prevented from over-speeding the vehicle. In particular, in this embodiment, the change in the playback state of the music prevents the driver from listening to the up-tempo music, and the driver does not feel uplifted by listening to the music. You can feel calm and prevent the driver from speeding up the vehicle too much.
Further, in this embodiment, as an example of changing the playback state, it was mentioned that the volume of the music being played was attenuated. However, according to this, the driver should be careful not to increase the speed of the vehicle too much. In order to notice and calm down, the driver is prevented from over-speeding the vehicle. In particular, in this embodiment, the effect of raising the mood of the up-tempo song is reduced, the rise of the driver's mood is suppressed, the driver's mood is calm, and the driver increases the speed of the vehicle too much. Can be prevented.

In the present embodiment, when there is an occupant other than the driver, the tune of the music being played is not changed. As described above, when there is an occupant other than the driver, there is a high possibility that the occupant will warn and warn that the driver increases the speed of the vehicle too much. There is no need to calm down. Therefore, according to the present embodiment, when there is an occupant other than the driver, the reproduction state of the music is not changed, so that an unnecessary change of the music being played is prevented. .
Further, in the present embodiment, the reproduction state of the music is changed only when the specific music tone is an up-tempo music tone. For this reason, the tune of the music being played is a slow tempo tune, and therefore does not raise the driver's mood, and when the driver does not overspeed the vehicle due to the music, It is prevented that the reproduction state of the music is changed meaninglessly.

The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention.
In the present embodiment, the example in which the data stored in the tune field is acquired from an external server and the user inputs the data via the input unit 17 has been described. May be detected, and the tune data may be registered in the tune field 43 based on the characteristics. According to this configuration, even when the external server does not have data related to the music tone, the data is surely stored in the music tone field, and the data is automatically stored. Labor can be reduced.

  In this embodiment, in this embodiment, when determining whether or not the music is music that enhances the driver's mood, the control unit 20 is based on data stored in the music tone field of the music database 36. However, the determination may be made based on data stored in the genre field, for example. Specifically, hard rock corresponds to music that raises the mood, and classic corresponds to music that calms the mood, such as music that raises the mood for each genre, or music that calms down in advance. In addition, a configuration in which the control unit 20 determines based on this determination may be used.

In the present embodiment, as an example of changing the playback state of the music, the up tempo music is changed to the slow tempo music. However, the present invention is not limited to this. For example, the slow tempo music is changed to the up tempo music. You may change to music. In other words, any structure may be used as long as the music being played is changed to a music having a different tone. Even in this configuration, the driver can be aware that the speed of the vehicle should be increased too much, so that the driver is prevented from excessively increasing the speed of the vehicle.
Similarly, in the present embodiment, as an example of changing the playback state of the music, the tempo of the up tempo is downgraded to the slow tempo, but the present invention is not limited to this. For example, the tempo of the slow tempo is changed. The tempo may be increased to the tempo of the song. That is, any configuration may be used as long as the tone of the music being played is changed. Even in this configuration, the driver can be aware that the speed of the vehicle should be increased too much, so that the driver is prevented from excessively increasing the speed of the vehicle.
Further, in the present embodiment, when there is an occupant other than the driver, the regeneration state is not changed. However, the regeneration state may be changed regardless of the presence or absence of an occupant.

It is a block diagram which shows the functional structure of the navigation apparatus which concerns on this embodiment. It is a figure which shows a music database. It is a flowchart which shows operation | movement of a navigation apparatus. It is a flowchart which shows the operation | movement at the time of performing a reference speed acquisition process. It is a figure which shows an example of the display of the display part at the time of a reference speed setting.

Explanation of symbols

10 Navigation device (Vehicle acoustic device)
13 Vehicle speed detection unit (vehicle speed detection means)
14 Occupant detection part (Occupant detection means)
20 control part 36 music database

Claims (2)

In an in-vehicle audio device that plays music,
Vehicle speed detection means for detecting the speed of the vehicle ;
Occupant detection means for detecting the presence or absence of an occupant other than the driver;
When it is detected by the occupant detection means that there is no occupant other than the driver, and when playing an up-tempo tune, the speed detected by the vehicle speed detection means and the set reference speed Depending on the comparison result, the music to be played is changed to a music having a different tone from that of the uptempo, while the passenger detection means detects that there is an occupant other than the driver. and a reproduction control means for inhibiting change of the music,
The reproduction control means includes
The speed limit of the roadway on which the vehicle is traveling, or the type of roadway on which the vehicle is traveling can be acquired,
An in-vehicle acoustic device characterized in that the reference speed is set according to the acquired speed limit of the roadway or the type of the roadway when comparing the speed detected by the vehicle speed detecting means and the reference speed . A method for controlling a vehicle audio apparatus for reproducing easier songs,
When the presence or absence of an occupant other than the driver is detected, and it is detected that there is no occupant other than the driver and an uptempo tune is being played, the vehicle speed is detected, and the detected vehicle and speed, according to a result of comparison between set criteria speed, the music of different melody from that of the up-tempo melody, while changing the tune to be played, if it is detected that there are occupants other than the driver , Prohibit the change of the music to play,
In comparing the detected speed with the reference speed, the speed limit of the roadway on which the vehicle is traveling, or the type of the roadway on which the vehicle is traveling is acquired, and the acquired speed limit of the roadway, or A control method for an in-vehicle acoustic device, wherein the reference speed is set according to a type of roadway .

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