JP6760700B2 - Communication system - Google Patents

Description

The present invention relates to a communication system between passengers in the space of a moving body such as a vehicle.

In an in-vehicle environment such as a car, a conversation may occur between a occupant in front of the driver's seat or the passenger's seat and a occupant in the back seat. However, in a relatively large vehicle, the distance between the front seat and the rear seat becomes large, which makes it difficult to hear the conversation between the passengers. In such a situation, the conversation between the passengers in the front seat is input by voice from the microphone of the AVN (audiovisual navigation) device on the front seat side, and the voice is output from the speaker in the rear seat to communicate between the passengers. A method to make it easier to take is being considered. Such a method is sometimes referred to as double zone communication (WZC). In double zone communication, it is also possible to input the voice of the passenger from the microphone on the rear seat side and output the voice from the speaker on the driver's seat side.

In this way, while there are technologies that take into consideration communication in the vehicle interior space, there are also rear entertainment technologies that are specialized for passengers in the rear seats. For example, there is a function for personal use (hereinafter referred to as PU) of a passenger in the back seat who connects his / her smartphone to the rear display provided behind the front seat and views the contents of the smartphone. When using the PU, the rear display functions as if it were a smartphone output device, allowing passengers in the rear seats to see the image displayed on the rear display and listen to the sound output from it. In addition, in consideration of sound leakage to the surroundings, passengers can also connect headphones to the rear display to listen to sound.

As described above, if communication in the vehicle interior space and PU technology coexist, communication between passengers may not be successful. In particular, it is difficult for passengers in the back seats to communicate at the desired timing when wearing earphones or headphones. As a method of solving such a problem, in the voice control system of Patent Document 1, when the passenger is listening to the voice through earphones or headphones, the carrier wants to talk with the passenger. By performing a predetermined input operation, the output of voice from the earphone or headphone worn by the passenger is stopped, facilitating communication between the driver and the passenger.

Japanese Unexamined Patent Publication No. 2016-107868

FIG. 12 is a diagram illustrating a problem of a conventional communication system. As shown in FIG. 12A, the communication system 1 includes seat back monitors 5 and 6 connected to AVN2 via a connection line 4 such as AVN2, distributor 3 and HDMI, and flip-down rear vision (on the ceiling in the vehicle). It includes an attached foldable monitor) 7 and a speaker 8 for the rear seat that outputs sound from AVN2. FIG. 12B is an example of a seat back monitor.

The image data reproduced by the AVN2 is distributed to the monitors 5, 6 and 7 via the distributor 3 and the connection line 4, and the reproduced audio data is output from the speaker 8. When the front passenger has a conversation with the rear passenger, when the front passenger presses the WZC button 9, the conversation voice input from the microphone connected to the AVN is output from the speaker 8.

Further, as the PU of the rear passenger, the smartphones 11 and 12 can be connected to the monitors 5 and 6 via a connection line 10 such as HDMI (registered trademark), respectively. When the smartphones 11 and 12 are connected to the monitors 5 and 6, the monitors 5 and 6 can function as a dedicated output device for the smartphones 11 and 12. Passenger A watches the content of the smartphone 11 on the monitor 5, and passenger B watches the content of the smartphone on the monitor 6. At this time, the passengers A and B wear headphones 13 and 14, respectively, in order to avoid voice interference between the neighbors.

In the PU state, the passenger wears headphones 13 and 14 to listen to the voice, but when the passenger in the front seat talks with the passenger in the rear seat, that is, when performing WZC, the rear speaker Since it is necessary to use 8, the passengers A and B in the rear seats need to manually stop the contents of the smartphones 11 and 12 and remove the headphones 13 and 14. Further, although it is possible to disconnect the connection line 10 between the monitors 5 and 6 and the smartphones 11 and 12, or to stop the content playback of the smartphones 11 and 12 by using wireless communication, the passenger A, B needs to remove the headphones 13 and 14 in order to hear the sound from the speaker 12. The act of removing the headphones at each WZC conversation is very troublesome for the passengers A and B in the rear seats during the PU.

The present invention solves such a conventional problem, and an object of the present invention is to provide a communication system capable of conducting conversations between passengers with good operability.

The communication system according to the present invention comprises an in-vehicle device provided with multimedia reproduction means and voice input means, and an output device connected to the in-vehicle device and capable of outputting multimedia data reproduced by the multimedia reproduction means. The in-vehicle device includes a communication means capable of outputting voice data input from the voice input means in response to a user operation from a speaker arranged in the vicinity of the output device via a first voice path. The vehicle-mounted device further includes a detection means for detecting whether or not a first multifunctional mobile terminal is connected to the output device, and the communication means is a first multifunctional type. When the connection of the mobile terminal is detected, the voice data is transmitted to the first multifunctional mobile terminal via a second voice path different from the first voice path.

Preferably, a second multifunctional mobile terminal is connected to the in-vehicle device, and a second voice path is established between the second multifunctional mobile terminal and the first multifunctional mobile terminal. It is a telephone network. Preferably, a second multifunctional mobile terminal is connected to the in-vehicle device, and the second voice path is a first multifunctional mobile terminal and a second multifunctional mobile terminal that pass through the in-vehicle device. It is a wireless communication with. A headphone is preferably connected to the output device, and the audio data received by the first multifunctional mobile terminal is output from the headphone connected to the output device. Preferably, the second multifunctional mobile terminal is hands-free connected to the in-vehicle device. Preferably, the communication means outputs the voice data from the speaker by the first voice path when the connection of the first multifunctional mobile terminal is not detected. Preferably, the vehicle-mounted device further includes a conversion means for converting the voice data input by the voice input means into text data, and the communication means converts the text data into a first multiple via a second voice path. Send to a functional mobile terminal. Preferably, the output device can output image data and audio data output from the first multifunctional mobile terminal when the first multifunctional mobile terminal is connected. Preferably, the output device is located on the rear seat side of the vehicle.

According to the present invention, when the first multifunctional mobile terminal is connected to the output device, the voice data input from the voice input means is subjected to the first voice data via a second voice path different from the usual one. Since it is transmitted to a multifunctional mobile terminal, even if the passenger wears headphones and listens to the sound of the output device, he / she can listen to the voice data from the voice input device without removing the headphones. Can be done. This makes it possible to improve the operability when conducting a voice conversation as compared with a conventional communication system.

It is a figure which shows the whole structure of the communication system which concerns on embodiment of this invention. It is a block diagram which shows the structure of AVN which concerns on Example of this invention. It is a figure which shows an example of acquiring information from another distribution site. It is a figure which illustrates the functional structure of the program executed by AVN which concerns on embodiment of this invention. It is a figure explaining the transmission operation of the telephone transmission part which concerns on embodiment of this invention. It is a block diagram which shows the typical structure of the portable terminal which concerns on embodiment of this invention. It is a flow which shows the operation of the communication system which concerns on embodiment of this invention. It is a figure which conceptually explains the operation of the communication system which concerns on embodiment of this invention. It is a figure which conceptually explains the operation of the communication system which concerns on the modification of this invention. It is a figure which concretely explains the operation of the communication system which concerns on the modification of this invention. It is a figure which shows the other example which connects the portable terminals by the Example of this invention. It is a figure explaining the problem of the conventional communication system.

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing an overall schematic configuration of an in-vehicle communication system according to an embodiment of the present invention. The communication system 30 according to the embodiment of the present invention includes the same configuration as the communication system 1 shown in FIG. 12, in which the microphone 50 and the smartphone 60 are connected to the AVN 40. In the communication system 30, the AVN 40 is connected to the monitors 5 and 6 and the rear vision 7 via the distributor 3 and the connection line 4. The connection line 4 includes a video line, an audio line, a control line, and the like, and is configured by using, for example, HDMI. The video data and audio data reproduced by the AVN40 can be output from the monitors 5, 6 and the rear vision 7. The communication system 30 is equipped with a double zone communication (WZC) function for communicating between passengers in the front and rear seats. The double zone communication function is activated when the WZC button 9 is pressed by the user, and the conversation voice input from the microphone 50 is output from the speaker 8 in the rear seat via the voice signal line 70. In the present invention, as will be described later, when the monitors 5 and 6 are in the personal use (PU) state, the conversation voice input from the microphone 50 is output by a voice path different from that of the voice signal line 70.

Further, the communication system 30 is equipped with a personal use function for passengers in the rear seats using the monitors 5 and 6. Smartphones 11 and 12 can be connected to the monitors 5 and 6 via the connection line 10, and the connection line 10 includes a video line, an audio line, a control line, and the like, and is configured by using, for example, HDMI (registered trademark). Will be done. The multimedia data reproduced by the smartphones 11 and 12 is output to the monitors 5 and 6 via the connection line 10, and the monitors 5 and 6 display the video projected on the smartphones 11 and 12 and output the sound. be able to. Headphones 13 and 14 can be connected to the monitors 5 and 6 to prevent audio leakage to adjacent passengers. The monitors 5 and 6 have a built-in selection circuit for selecting either the connection line 4 or the multimedia data input from the connection line 10. The selection circuit can select any multimedia data by the control signal from the AVN40, or selects the previously input multimedia data.

The AVN 40 included in the communication system 30 is an example, and may be a computer device, an in-vehicle device, or an electronic device having an audio reproduction function, a video reproduction function, a television reception function, a radio reception function, a navigation function, and the like.

FIG. 2 is a block diagram showing a configuration of an AVN according to this embodiment. As an example, the AVN 40 includes an input unit 100, an external interface (I / F) 110, a navigation unit 120, a multimedia playback unit 130, a display unit 140, an audio output unit 150, a communication unit 160, a storage unit 170, and a control unit 180. Consists of including. It should be noted that this configuration is an example, and may include other functions.

The input unit 100 includes a microphone 50 capable of voice input, a WZC button 9 for starting WZC, an input button, a touch panel, and the like, and provides these inputs to the control unit 180. In particular, when WZC9 is pressed, the voice data from the microphone 50 is interrupted by the voice signal line 70.

The external I / F 110 enables the connection between the AVN 40 and an external device. In this example, the external I / F 110 includes a distributor 3, a connection line 4, an audio signal line 70, and the like, and connects the rear entertainment monitors 5, 6, 7, and the speaker 8 to the AVN 40.

The navigation unit 120 calculates the current location of the own vehicle based on the GPS signal from the GPS satellite and the sensor output of the gyro sensor, etc., guides the road around the position of the own vehicle, and guides the route to the destination. The multimedia playback unit 130 reproduces audio data and video data stored in a recording medium such as a CD, DVD, Blu-ray disc, semiconductor memory, or hard disk. The reproduced video data and audio data are output from the display unit 140 and the audio output unit 150 provided in the front seats, and further from the monitors 5, 6 and 7 in the rear seats via the distributor 3 and the connection line 4. It is output and can be output from the speaker 8 via the audio signal line 70.

The display unit 140 includes a display arranged in the front seat, and displays an image generated by the navigation unit 120 and the multimedia playback unit 130. The voice output unit 150 includes a speaker arranged in the front seat and outputs the voice generated by the navigation unit 120 and the multimedia playback unit 130.

The communication unit 160 enables wireless or wired communication connection with a smartphone or other external device. The communication unit 160 enables a communication connection with a portable terminal such as a smartphone 60 by a short-range wireless connection such as Bluetooth (registered trademark). The wireless connection with the smartphone 60 is basically a connection using the HFP profile used for hands-free calling, but a connection using the ICP profile that connects the smartphones like a transceiver is also possible. Further, as shown in FIG. 3, the communication unit 160 accesses the location information distribution site 162 via the network NW, acquires the vehicle position information from the location information distribution site 162, or accesses the map data distribution site 164 from the location information distribution site 162, and from there. It is possible to acquire necessary map data or access the road traffic information distribution site 166 from which detailed information regarding road traffic information can be obtained. The own vehicle position information obtained from the position information distribution site 162 can be used instead of the own vehicle position information calculated by the position information calculation unit 110.

The storage unit 170 can store application software and programs executed by the control unit 180, map data required by the navigation unit 120, and the like. The storage unit 170 can further store multimedia data that can be reproduced by the multimedia reproduction unit 130.

In a preferred embodiment, the control unit 180 is composed of a microcontroller including a ROM, a RAM, and the like, and the ROM or the RAM can execute various programs for controlling the operation of each unit of the AVN2. In this embodiment, when the WZC button 9 of the input unit 100 is pressed (when the WZC start trigger is activated), the communication program according to the usage status of the PU is executed. Specifically, in the communication program, when the smartphone 60 (portable terminal) is connected to the AVN40 and the rear seat is in the PU state, the smartphone 11 used for the PU from the smartphone 60, It is possible to transmit to 12 and output voice to headphones 13 and 14 via smartphones 11 and 12 used for PU. When the smartphone 60 is not connected to the AVN40, or when the rear seats are not in the PU state, normal WZC is possible.

FIG. 4 is a diagram showing a functional configuration of the communication program according to the present embodiment. The communication program 200 includes a portable terminal detection unit 210, a PU state detection unit 220, a WZC start detection unit 230, a voice route determination unit 240, a telephone transmission unit 250, a voice route establishment unit 260, and a WZC end unit 270. To.

The portable terminal detection unit 210 detects that the smartphone (portable terminal) 60 is connected via the communication unit 160. If the smartphone 60 is not detected, normal WZC communication will be performed. The PU state detection unit 220 detects whether or not the seat back monitors 5 and 6 are in the PU state. Specifically, it detects whether or not the smartphones 11 and 12 are connected to the monitors 5 and 6 via the connection line 10. If the smartphones 11 and 12 are connected, it is determined that they are in the PU state. When the smartphones 11 and 12 are connected to the monitors 5 and 6 via the connection line 10, the selection circuit of the monitors 5 and 6 does not select the data input from the connection line 4. In one preferred embodiment, the PU state detection unit 220 detects that the smartphones 11 and 12 are connected from the selected state of the selection circuit of the monitors 11 and 12. Further, in another example, the PU state detection unit 220 transmits a control signal for detecting whether or not the connection line 10 is in use to the monitors 5 and 6 via the connection line 4, and the monitor 5 6 may send a signal in response to this to the AVN 40 via the control line 4. When the PU state is not detected by the PU state detection unit 220 (when the connection of the smartphones 11 and 12 is not detected), the ANV40 can distribute the reproduced data to the monitors 5 and 6 via the connection line 4. is there.

The WZC start detection unit 230 detects the start of WZC depending on whether or not the WZC button 9 is pressed. When the WZC button 9 is pressed, or during that period, the WZC function is enabled, and the voice input from the microphone 50 is output from the speaker 8 via the voice signal line 70.

When the start of WZC is detected by the WZC start detection unit 230, the voice route determination unit 240 determines the voice route by WZC based on the detection result of the portable terminal detection unit 210 and the detection result of the PU state detection unit 220. Specifically, when the smartphone 60 is connected to the AVN40 and the smartphones 11 and 12 are connected to any of the monitors 5 and 6, the voice path determination unit 240 uses the public telephone line network via the smartphone 60. Is determined as the voice path. That is, a call is made from the smartphone 60 to the smartphone 11 or 12, and a voice call is made by telephone between the two devices. At this time, the smartphone 60 is hands-free connected to the AVN 40. The voice data input from the microphone 50 is interrupted and received by the smartphones 11 and 12 via the AVN40, the smartphone 60, and a public telephone line.

On the other hand, when the smartphone 60 is not connected to the AVN40 or the smartphones 11 and 12 are not connected to the monitors 5 and 6, the voice path determining unit 240 uses the voice signal as in the case of the normal WZC. The line 70 is determined as the voice path. In this case, the voice data input from the microphone 50 is output from the speaker-8 via the AVN 40 and the voice signal line 70.

When the voice route determination unit 240 determines the public telephone line network as the voice path, the telephone transmission unit 250 passes the public telephone line network from the smartphone 60 to the smartphones 11 and 12 used for the PU in the rear seat. Make a call. FIG. 5 is a diagram illustrating a calling operation by the telephone transmitting unit 250. First, as shown in FIG. 5A, when the smartphone 60 is hands-free connected to the AVN40, the AVN40 acquires phonebook information from the smartphone 60 and corresponds to the PU smartphones 11 and 12 on the setting screen. Select a phone number and register the settings. By this setting registration, it is possible to automatically make a call from the smartphone 60 to the PU smartphones 11 and 12. However, if the phone number of the PU smartphone is not in the phone book, the setting can be registered manually.

As another method, as shown in FIG. 5 (B), the AVN40 and the smartphone are paired with Bluetooth (registered trademark). When the accessory (ACC) is turned on, the communication unit 160 of the AVN40 searches for smartphones in the vicinity, displays the searched smartphone on the display unit 140, and even if the PU smartphone is set and registered from among them. Good.

The voice path establishment unit 260 establishes the voice path determined by the voice path determination unit 240. When performing normal WZC, the voice data input from the microphone 50 is output from the speaker 12 in the rear seat via the voice signal line 70, and in the PU state, the smartphone 60 to the PU smartphone. Audio is output to 11 and 12 via the public telephone network. At this time, for example, when the receiving screen is displayed on the monitors 5 and 6 (see FIG. 8C) and the passenger in the back seat selects "receive", the voice signal line by the telephone network is established. To. The WZC termination unit 270 terminates the WZC when the call by the smartphone 60 is terminated, when the WZC button 9 is pressed again, or when the call is terminated by the smartphones 11 and 12 in the rear seats.

FIG. 6 is a block diagram showing a typical configuration of a smartphone (portable terminal). The smartphone has an input unit 300 that receives input from a user, a communication unit 310 that enables communication via a public telephone network or network communication, a display unit 320 that includes a display medium such as a display, and audio that controls audio output. An output unit 330, a multimedia reproduction unit 340 for reproducing video data and image data, a storage unit 350 for storing various data, a control unit 360 for controlling each unit by executing a program including a microcontroller and a microprocessor. Including.

The control unit 360 makes a call in response to an instruction from the telephone oscillator 250 of the AVN40, and when it detects an incoming call, the control unit 360 displays an interrupt receiving screen on the display unit 320 (see FIG. 8C). When the user selects "receive", a voice call via the public telephone network is established with the calling smartphone.

FIG. 7 is a flow showing the operation of the communication system according to this embodiment. In the communication system 30, first, whether or not the WZC button 9 is pressed is detected by the WZC start detection unit 230 (S100). When the press of the WZC button 9 is detected, whether the smartphone 60 is connected to the AVN 40 by the portable terminal detection unit 210 (S102) and whether the PU state is in the PU state by the PU state detection unit 220 (monitor 5, Whether or not a smartphone is connected to 6) is detected (S104). When the smartphone 60 is connected and the PU smartphone is connected (in this example, it is assumed that the smartphone 11 is connected), the voice path determination unit 240 determines the public telephone line network as the voice path. (S106). In response to this decision, the telephone calling unit 250 makes a call to the smartphone 11 of the PU connected to the monitor 5 in the rear seat (S108), and a telephone line is established between the smartphones 60 and 11 (S110). Then, the conversation voice from the passenger in the front seat is output from the smartphone 60 to the smartphone 11 of the PU, and the voice received by the smartphone 11 is output to the headphones 13 via the connection line 11 and the monitor 5. As a result, the passenger can listen to the WZC voice of the passenger in the front seat without removing the headphones 13.

When the smartphone 60 is not connected or is not in the PU state, the voice path determination unit 240 determines the voice signal line 70 by the normal WZC as the voice path (S112), and outputs the voice by the voice signal line 70. (S114). Therefore, the conversation voice of the passenger in the front seat is output from the speaker 8 via the voice signal line.

FIG. 8 is a diagram conceptually showing the operation of the communication system of this embodiment. As shown in FIG. 8A, when the on button of the WZC button 9 is pressed and the WZC is turned on, a transmission is performed from the smartphone 60 to the smartphone of the PU. As shown in FIG. 8B, the PU user listens to the ringtone from the headphones 13 and confirms the receiving screen 80 displayed on the monitor 5 as shown in FIG. 8C. On the receiving screen 80, the name or telephone number of the caller is displayed, and further, a button 82 for rejecting an incoming call or a button 84 for receiving an incoming call is displayed. When the receive button 84 is operated, a voice call by telephone is established. After that, when the end of the call by the smartphone or the off button operation of the WZC button 9 is detected, the WZC is terminated.

Next, a modified example of this embodiment will be described. In the above embodiment, the communication by the voice signal is illustrated, but in the modified example, the voice signal is converted into text data and displayed on the monitor of the rear seat.

FIG. 9 is a diagram conceptually showing the operation of the communication system according to the modified example, and FIG. 10 is a concrete display example. In the modified example, the voice data input from the microphone 50 is converted into text data by the voice recognition module mounted on the AVN40. For example, as shown in FIG. 10 (A), the voice of "Hello" is input from the driver, it is converted into text data, through a public telephone line network the text data is superposed on the speech data is received by the smartphone of PU Te, on the monitor of the rear seat, displays "Hello" along with the name of the speaker (Fig. 10 (B)). Further, as shown in FIG. 10C, when the text data "Hello!" Is input to the smartphone of the PU in the rear seat, the text data is transmitted to the smartphone 60 in the front seat, and the text data is voice-recognized. It is converted into voice data by the module and output as voice from the smartphone 60 (FIG. 10 (A)). In the modified example, in addition to voice input / voice output, WZC using conversion to text data and transmission / reception is possible.

In the present embodiment and the modified examples described above, the connection between the smartphone 60 in the front seat and the smartphones 11 and 12 in the PU in the rear seat uses the public telephone line network, but the smartphone uses a system other than the public telephone line network. You may try to connect each other. FIG. 11 is a diagram showing another example of connecting smartphones to each other. Pairing a plurality of smartphones with the AVN40 in advance is the same as in FIG. 5 (B). However, in the connection shown in FIG. 11, smartphones are connected to each other using ICP, which is a profile of Bluetooth (registered trademark), with AVN40 as a relay point. In such a connection, voice data is transmitted and received by using a smartphone like a transceiver without using a public telephone network. In the case of this example, the voice path determination unit 240 determines to perform WZC on the voice signal line using ICP, and the voice path establishment unit 260 establishes the voice line using ICP. When performing WZC using ICP, a dedicated application may be installed in advance on the smartphone and AVN40 to support WZC communication.

In the embodiment including the above-described modification, after the start of WZC, the voice and text input from the front seat side are mainly output from the headphones and monitor in the rear seat, but WZC has been established. If so, it is also possible to output the voice input from the rear seats from the front seats. For example, in the case of a normal WZC, if a microphone or the like is provided in the rear seat and a speaker is provided in the front seat, the sound input from the rear seat can be output from the front seat. Further, in the WZC using the telephone line network, the voice input from the portable terminal in the rear seat can be output from the voice output unit 150 of the AVN in the front seat.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments, and various modifications and modifications are made within the scope of the gist of the invention described in the claims. It can be changed.

3: Distributor 4: Connection line 5, 6: Monitor 8: Speaker 9: WZC button 10: Connection line 11, 12: Smartphone 13, 14: Headphone 30: Communication system 40: AVN
50: Microphone 60: Smartphone 70: Voice signal line 80: Received screen

Claims (8)

The vehicle-mounted device includes an in-vehicle device provided with a multimedia reproduction means and a voice input means, and an output device connected to the in-vehicle device and capable of outputting multimedia data reproduced by the multimedia reproduction means. A communication system including a communication means capable of outputting voice data input from the voice input means in response to a user operation from a speaker arranged in the vicinity of the output device via a first voice path.
The in-vehicle device further includes a detecting means for detecting whether or not a first multifunctional mobile terminal is connected to the output device.
When the connection of the first multifunctional mobile terminal is detected, the communication means transmits the voice data to the first multifunctional mobile terminal via a second voice path different from the first voice path. Send and
A communication system in which headphones are connected to the output device, and the voice data received by the first multifunctional mobile terminal is output from the headphones connected to the output device . A second multifunctional mobile terminal is connected to the in-vehicle device, and a second voice path is a telephone established between the second multifunctional mobile terminal and the first multifunctional mobile terminal. The communication system according to claim 1, which is a line network. A second multifunctional mobile terminal is connected to the in-vehicle device, and a second voice path is a connection between the first multifunctional mobile terminal and the second multifunctional mobile terminal via the in-vehicle device. The communication system according to claim 1, which is wireless communication between the two. The communication system according to any one of claims 1 to 3 , wherein the second multifunctional mobile terminal is hands-free connected to the in-vehicle device. The communication system according to any one of claims 1 to 4 , wherein the communication means outputs the voice data from the speaker by the first voice path when the connection of the first multifunctional mobile terminal is not detected. .. The vehicle-mounted device further includes a conversion means for converting voice data input by the voice input means into text data, and the communication means is a first multifunctional type that converts the text data into a second voice path. The communication system according to any one of claims 1 to 5, which is transmitted to a mobile terminal. The output device can output image data and audio data output from the first multifunctional mobile terminal when the first multifunctional mobile terminal is connected. Any one of claims 1 to 6. The communication system described in one. The communication system according to any one of claims 1 to 7 , wherein the output device is arranged on the rear seat side of the vehicle.

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