JP4312369B2 - In-vehicle acoustic system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle audio system, and in particular, entertainment such as audio information such as a CD changer (CDC) and a radio tuner, and video information such as a television (TV) and DVD for a rear seat (rear seat) user. The present invention relates to an acoustic system for rear seats. Such a rear seat acoustic system is also called a rear seat entertainment system (RES: Rear Entertainment System), and is generally provided for high-end vehicles.
[0002]
In the following description, sources other than the CDC, TV, etc. that can output audio / video information in the same manner (communication devices such as telephones, navigation units, voice recognition units, etc.) are also referred to as “acoustic units” for convenience. Called.
[0003]
[Prior art]
In a conventional rear seat acoustic system (RES), an output is output from an operation unit for a user in the rear seat to select an acoustic unit (source) and perform operations such as volume adjustment, and a selected source. Headphones for listening to audio sound corresponding to the audio signal, a display for displaying information corresponding to the video signal output from the source, and the like are also prepared.
[0004]
The user at the rear seat operates the operation unit to instruct to select which source of audio / video information is to be output to the headphone / display, or to the source related to the audio / video information output to the headphone / display. By giving operation instructions (seek up / down, volume adjustment, etc.) to the source, the operating state of the source changed based on the instructions is received through the headphones and displayed through the display.
[0005]
Such a rear seat acoustic system (RES) is provided separately from the front seat acoustic system in the conventional in-vehicle acoustic system. That is, the conventional vehicle-mounted acoustic system is constructed by two independent acoustic systems for front and rear seats that are not connected to each other.
[0006]
[Problems to be solved by the invention]
As described above, in the conventional in-vehicle acoustic system, the acoustic system for the front seat and the acoustic system for the rear seat (RES) are provided independently of each other, so the acoustic unit (source) is also used for the front seat. And the rear seats had to be prepared separately.
[0007]
For example, when a user at the front seat and a user at the rear seat listen to music on the same CD, if there is only one CD, it is impossible for both users to listen to music at the same time. In order to listen to music, for example, the user at the front seat installs the CD in the acoustic system for the front seat and listens to music, and then the user at the rear seat receives the CD from the user at the front seat. In addition, it is necessary to install in the rear seat sound system and to operate the operation unit. Such troublesome labor can be eliminated by preparing each source separately for the front seat and the rear seat.
[0008]
However, separately preparing the source for the front seat and the source for the rear seat increases the cost of the entire system, which is not preferable from the viewpoint of cost performance.
Further, from the viewpoint of the user at the rear seat, since the troublesome work is required when selecting the same source as the front side as described above, the operation convenience of the operation unit is inferior in the rear seat acoustic system (RES). There was a problem.
[0009]
The present invention was created in view of the problems in the prior art, and provides an in-vehicle acoustic system that can improve operational convenience in a rear seat acoustic system (RES) and contribute to cost reduction. The purpose is to provide.
[0010]
[Means for Solving the Problems]
In order to solve the above-described problems of the prior art, according to the present invention, a plurality of acoustic units each capable of independently outputting audio / video information and any one of the plurality of acoustic units from a front seat in a passenger compartment. A first operation means for giving an operation instruction to the apparatus, a first information output means for outputting audio / video information relating to an operating state of the sound unit to which the operation instruction is given from the first operation means, a vehicle A second operating means for giving an operation instruction to any one of the plurality of acoustic units from a rear seat in the room; and an audio / audio relating to an operating state of the acoustic unit to which the operation instruction is given from the second operating means. A second information output means for outputting video information, wherein the second operation means has an operation section having an operation key for selectively setting one of the first and second operation modes. And said When the operation mode is set, the operation of the sound unit related to the audio / video information output to the second information output means is controlled regardless of the operation instruction from the first operation means. When the second operation mode is set, the audio / video information output to the first information output unit is linked with the control related to the operation instruction from the first operation unit. An in-vehicle acoustic system characterized by controlling the operation of an acoustic unit is provided.
[0011]
According to the vehicle-mounted acoustic system of the present invention, the second operation means on the rear seat side is separated from the first operation means on the front seat side when the first operation mode is set by the operation key of the operation unit. Regardless of the operation instruction, the operation of the sound unit related to the audio / video information output to the second information output means (for example, headphones) under the control is controlled.
[0012]
Further, when the second operation mode is set by the operation key of the operation unit, the second operation means on the rear seat side is interlocked with the control related to the operation instruction from the first operation means on the front seat side. The operation of the sound unit related to the audio / video information output to the first information output means (for example, a speaker) under the first operation means is controlled.
[0013]
When the second operation mode is set, even if the user at the rear seat selects the same source as the source (acoustic unit) selected by the user at the front seat, The operation can be controlled. That is, even when the same source as that on the front side is selected on the rear side, the audio / video information output from the source can be obtained without requiring the troublesome work that has been seen in the prior art. This makes it possible to improve the convenience of operation by the second operation means on the rear seat side.
[0014]
In addition, the second operation means on the rear seat side and the first operation means on the front seat side cooperate with each other, and can simultaneously instruct operation to the same source (that is, the same source can be shared). It is not necessary to prepare the same source separately for the front side and the rear side as in the prior art. As a result, the cost of the entire system can be reduced.
[0015]
The operation mode when the first operation mode is set is the same as the operation mode of the conventional rear seat acoustic system (RES).
In the following description, the first operation mode (regardless of the operation instruction from the first operation means on the front seat side, is output to the second information output means under the second operation means on the rear seat side. The operation mode for controlling the operation of the audio unit related to the audio / video information is referred to as “separate mode” for convenience.
[0016]
On the other hand, the second operation mode (in conjunction with the control related to the operation instruction from the first operation means on the front seat side is output to the first information output means under the first operation means. The operation mode for controlling the operation of the audio unit related to the audio / video information is called “front mode” for convenience.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a block diagram showing a schematic configuration of an in-vehicle acoustic system according to an embodiment of the present invention.
The on-vehicle acoustic system according to the present embodiment has a front seat operation unit 1 (also referred to as a head unit (HU)) and a rear for instructing various sources (acoustic units) from the front seat and the rear seat, respectively. A seat operation unit 2 is provided, and these operation units are connected via a bus 3 such as an optical fiber provided as a transmission path. A speaker 4 and a display 5 are connected to the front seat operation unit 1, and a headphone 6 and a display 7 are connected to the rear seat operation unit 2. In the illustrated example, for simplicity of explanation, only one speaker 4 is connected to the front seat operation unit 1, but in reality, two or four speakers 4 are installed at predetermined positions in the vehicle interior. Has been. Similarly, in the rear seat operation unit 2, actually, two headphones 6 and two displays 7 are respectively installed at predetermined positions on the left and right sides of the rear seat.
[0018]
As the acoustic unit, CDC 11, amplifier unit (AMP) 12, radio tuner 13, cassette tape deck 14, communication device (telephone etc.) 15, navigation unit 16, voice recognition unit 17, television (TV) 18 and extra unit (DVD, game machine, etc.) 19 is included. Among them, the acoustic units 11 to 17 are connected to the bus 3, the TV 18 is connected to the front seat operation unit 1, and the extra unit 19 is connected to the rear seat operation unit 2.
[0019]
In the in-vehicle acoustic system of the present embodiment, the rear seat operation unit 2, the headphones 6, the display 7, and the extra unit 19 constitute a rear seat acoustic system (rear seat entertainment system) RES.
The front-seat operation unit 1 is for a user on the front side of the passenger compartment, such as a driver or passenger in a passenger seat, to perform operations such as selection of each source (acoustic unit) and volume / sound quality adjustment. It is installed at a predetermined position on the front side in the passenger compartment. The front seat operation unit 1 selects one of the audio units such as the CDC 11 in accordance with an operation instruction given by the user, and sends audio / video data output from the selected audio unit via the bus 3. Based on the received data, an audio signal is output to the speaker 4 and a video signal is output to the display 5. Thereby, the user on the front side can listen to the audio sound corresponding to the audio signal output from the speaker 4 and can view the information corresponding to the video signal displayed on the screen of the display 5.
[0020]
The rear seat operation unit 2 is used by a user who is in the rear seat of the vehicle compartment to select each sound unit (source) and to adjust the volume and sound quality. Installed in place. As with the front seat operation unit 1, the rear seat operation unit 2 selects one of the acoustic units such as the CDC 11 in accordance with an operation instruction given by the user, and is output from the selected acoustic unit. Audio / video data is received via the bus 3, and based on the received data, an audio signal is output to the headphones 6 and a video signal is output to the display 7. As a result, the rear user can listen to the audio sound corresponding to the audio signal output from the headphones 6 and view the information corresponding to the video signal displayed on the screen of the display 7. The configuration of the rear seat operation unit 2 will be described later.
[0021]
Each acoustic unit (source) 11 to 19 receives, as a basic operation, data related to an operation instruction given from each operation unit 1 or 2 via the bus 3, and based on the received data, the own unit (source) ) And the data indicating the changed result (current operation state) are transmitted as audio / video signals to the operation units 1 and 2 that output the operation instruction via the bus 3.
[0022]
For example, in the case of the CDC 11, a plurality of CDs are loaded, and in response to operation instructions given from the operation units 1 and 2, signals recorded on the recording surface of the CD selected by the user are read and reproduced. The transmitted audio data is transmitted to the operation units 1 and 2 that output the operation instruction via the bus 3.
In the case of the radio tuner 13, in response to operation instructions given from the operation units 1 and 2, an audio signal is generated by receiving and demodulating an FM broadcast or AM broadcast signal, which is converted into a digital audio signal. The data is converted into data and transmitted to the operation units 1 and 2 that output the operation instruction via the bus 3.
[0023]
In the case of the cassette tape deck 14, the audio signal recorded on the loaded cassette tape is reproduced in response to an operation instruction given from the operation units 1 and 2, and this is converted into digital audio data. The data is converted and transmitted to the operation units 1 and 2 that output the operation instruction via the bus 3.
The rear seat operation unit 2 includes an operation unit 21, a communication control unit 22, an operation unit-specific information storage unit 23, a control unit 24, a display unit 25, an audio output unit 26, and a video output unit 27.
[0024]
The operation unit 21 is used by a user on the rear seat to input various operation instructions, and includes various operation keys such as a power key and numeric keys. A specific example of the operation unit 21 will be described later.
The communication control unit 22 converts various data output from the control unit 24 into a predetermined communication format, and is directed to the front seat operation unit 1 and each acoustic unit (CDC 11, radio tuner 13, etc.) via the bus 3. Send. In addition, the communication control unit 22 receives various data transmitted from the front seat operation unit 1 and each acoustic unit via the bus 3 and performs predetermined demodulation processing on these data, and then the control unit 24, output to the audio output unit 26 or the video output unit 27.
[0025]
The operation unit-specific information storage unit 23 indicates the acquisition state of the audio / video information when the rear seat operation unit 2 is instructed to turn off the power and the output operation of the audio / video signal is stopped. Data shown (for convenience, referred to as “acquisition state data”) is stored. This acquired state data is stored for reference when necessary at the next power-on.
[0026]
As this acquisition state data, for example, “unit type” indicating which unit is used in each acoustic unit (CDC 11, radio tuner 13, etc.). If it is an audio unit, the audio sound is listened to. “Volume / sound quality” for instructing an adjustment value of the sound volume and sound quality at the time of recording, “detailed information for each unit” for instructing a detailed acquisition state for each acoustic unit, and the like are considered. As specific contents of the detailed information for each unit, for example, if the radio tuner 13 is used, the type of FM / AM, information on the broadcast station (reception frequency), etc. used the CDC 11. In some cases, the disc number indicating which CD was being played among a plurality of loaded CDs, and the playback position indicating how much time has passed since the beginning of what song was played. Information etc. are stored.
[0027]
The control unit 24 controls the entire rear seat operation unit 2. Specifically, in response to an operation instruction given from the user at the rear seat via the operation unit 21, the control unit 24 acquires audio / video data from each acoustic unit and reproduces the audio / video information. Control is performed such as an operation to be performed, an operation for displaying information instructing an operation state, etc. on the display unit 25, an operation for storing acquired state data, and an operation for reading out.
[0028]
Based on the data output from the control unit 24, the display unit 25 displays various information, for example, for the CDC 11, the disc number and playback position (number of tracks, elapsed time, etc.) during CD performance, and for the radio tuner 13, FM / Displays the reception frequency at the time of AM broadcast reception.
The audio output unit 26 receives audio data output from the selected acoustic unit from the communication control unit 22 via the bus 3, converts this data into an audio signal, and outputs the audio signal to the headphones 6. The audio output unit 26 controls the volume and sound quality in accordance with instructions given from the control unit 24.
[0029]
Similarly, the video output unit 27 receives video data output from the selected sound unit from the communication control unit 22 via the bus 3, converts this data into a video signal, and outputs the video signal to the display 7. The video output unit 27 performs control related to display of video information in accordance with an instruction given from the control unit 24.
Although not specifically illustrated because it is not directly related to the gist of the present invention, the front seat operation unit 1 also basically has the same internal configuration as the rear seat operation unit 2. However, in the case of the front seat operation unit 1, in addition to the configuration similar to the rear seat operation unit 2 described above, information for identifying a user who operates the unit (also referred to as “user ID”) is registered. It is common to have storage means for keeping them.
[0030]
FIG. 2 schematically shows the external configuration of the rear seat operation unit 2 in this system in the form of a plan view.
As shown in the figure, a display unit 25 is arranged on the upper side of the housing, and an operation unit 21 having various operation keys is arranged thereunder. For the display unit 25, for example, a liquid crystal display (LCD) is used. The operation unit 21 is provided with a numeric key 21a, a front mode selection key 21b, power keys 21c and 21d, a shift key 21e, an audio source selection key 21f, and a video source selection key 21g.
[0031]
The front mode selection key 21b is operated to select the front mode (ON state), and is operated again to set the front mode to the non-selected state (OFF state). When the front mode is in a non-selected state (off state), the separate mode is set. The power keys 21c and 21d are used by the users on the left and right sides of the rear seat to perform power on / off (ON / OFF) and volume adjustment (VOL.), Respectively. For the shift key 21e, operations such as FF / REW operation, seek up / down operation, etc. are instructed by operating portions with respective arrows. The audio source selection key 21f is used to select an audio source (CDC 11, cassette tape deck 14, etc.) from each acoustic unit (source) included in the present system. Similarly, a video source selection key is used. 21 g is for selecting a video source (display of the navigation unit 16, TV 18, DVD 19, etc.).
[0032]
Furthermore, jacks 210a and 210b provided as output terminals of the audio output unit 26 are provided at the lower left and lower right of the unit surface, respectively. Users on the left and right rear seats can listen to the audio sound by connecting the headphones 6 to the jacks 210a and 210b, respectively. Further, a jack 220 for an extra unit (DVD, game machine, etc.) 19 is provided between the left and right jacks 210a and 210b.
[0033]
The front seat operation unit 1 has the same external configuration as the rear seat operation unit 2 except that the jacks 210a and 210b for the headphones 6 and the jack 220 for the extra unit 19 are omitted. .
In the in-vehicle acoustic system according to the present embodiment, the sources 11 to 19 are “acoustic units”, the front seat operation unit 1 is “first operation means”, and the rear seat operation unit 2 is “second”. The speaker 4 and the display 5 correspond to the “first information output means”, and the headphones 6 and the display 7 correspond to the “second information output means”, respectively.
[0034]
As will be described later, in the in-vehicle acoustic system according to the present embodiment, when the separate mode is set, the rear seat operation unit 2 is connected to the headphones 6 regardless of the operation instruction from the front seat operation unit 1. / The operation of the source related to the audio / video information output to the display 7 is controlled. On the other hand, when the front mode is set, the rear seat operation unit 2 In conjunction with the control related to the operation instruction, the operation of the source related to the audio / video information output to the speaker 4 / display 5 is controlled.
[0035]
Furthermore, the on-vehicle acoustic system according to the present embodiment is output to the headphones 6 / display 7 when the rear seat operation unit 2 is turned off when the separate mode is set. When the front mode is set and the power is turned off (on), not only the headphones 6 / display 7 but also the source / audio information related to the current audio / video information is stopped (started). Each operation is also stopped (started) for the source related to the audio / video information output to the speaker 4 / display 5.
[0036]
Hereinafter, the operation | movement which the vehicle-mounted acoustic system of this embodiment performs is demonstrated, referring FIGS. 3-6.
First, operations in the separate mode and the front mode will be described with reference to FIG. 3 showing state transitions related to the operations.
When the separate mode is set, that is, in the state where the front mode selection key 21b of the rear seat operation unit 2 is set to “OFF”, the HU (front seat operation unit 1) selects the CDC 11 as a source, and RES It is assumed that (the rear seat operation unit 2) has selected the cassette tape deck 14 as a source.
[0037]
At this time, in order to control the source in RES2, a tape FF command is transmitted to HU1. In response to this, a tape FF status signal is output from HU1 and transmitted to RES2.
In this state, when the front mode is set in RES2 (that is, the front mode selection key 21b is set to “ON”), a front mode “ON” status signal is output from RES2 and transmitted to HU1. .
[0038]
Thereby, in RES2, the operation of the same source (in this case, CDC11) as the source selected by HU1 can be controlled.
Thereafter, an operation instruction related to the control of the CDC 11 and a response to the operation instruction are performed. That is, transmission of a CDC seek up command (RES2 → HU1), transmission of a CDC seek up command (HU1 → CDC11), transmission of a CDC seek up status signal (CDC11 → RES2 and HU1), transmission of a volume up command ( RES2 → HU1), a volume up command is transmitted (HU1 → AMP12), and a volume status signal is transmitted (AMP12 → RES2 and HU1).
[0039]
Next, the power on / off operation in the separate mode will be described with reference to FIG. 4 showing state transitions related to the operation.
Initially, both the HU (front seat operation unit 1) and the RES (rear seat operation unit 2) are assumed to have selected the CDC 11 as a source. At this time, CDC FF command transmission (RES2 → HU1), CDC FF command transmission (HU1 → CDC11), and CDC FF status signal transmission (CDC11 → RES2 and HU1) are performed.
[0040]
When the power is turned off in RES2 in this state (that is, the power keys 21c and 21d are turned off), a power-off command is output from RES2 and transmitted to HU1. In response to this, a mute command is transmitted from HU1 to RES2, and in response, a mute status signal is transmitted from RES2 to HU1.
[0041]
During this time, the HU 1 simply performs the muting process on the headphones 6 of the RES 2 and continues the operation of the CDC 11. In RES2, when the power off command is output, the display on the display unit 25 is turned off.
Thus, in the separate mode, the power supplies of HU1 and RES2 are independent of each other. Therefore, when the power supply is turned off at RES2, only the operation of RES2 stops. Conversely, when the power supply is turned on at RES2, only the operation of RES2 starts operation. (Or resume).
[0042]
In this case, since the power supply state of HU1 is not related to the power supply state of RES2, contrary to the above, even if the power supply of HU1 is turned off, the power supply of RES2 is not turned off. You can listen to music continuously.
Next, the power on / off operation in the front mode will be described with reference to FIG. 5 showing state transitions related to the operation.
[0043]
Initially, both the HU (front seat operation unit 1) and the RES (rear seat operation unit 2) are assumed to have selected the CDC 11 as a source. At this time, CDC FF command transmission (RES2 → HU1) and CDC FF status signal transmission (HU1 → RES2) are performed.
When the power is turned off in RES2 in such a state, power off command transmission (RES2 → HU1), mute command transmission (HU1 → AMP12), mute status signal transmission (AMP12 → HU1), power off Command transmission (HU1 → RES2, CDC11 and AMP12) and power off status signal transmission (RES2, CDC11 and AMP12 → HU1) are performed.
[0044]
Thus, in the front mode, the power supply of HU1 and RES2 is the same. Therefore, when the power supply is turned off at RES2, not only RES2 but also HU1 stops its operation, and conversely, when the power supply is turned on at RES2, RES2 And HU1 both start (or resume) operation.
In this case, since the power supply state of HU1 and the power supply state of RES2 are the same, contrary to the above, when the power supply of HU1 is turned off, the power supply of RES2 is also turned off simultaneously.
[0045]
FIG. 6 shows the relationship between the state transitions related to the power on / off operation in the separate mode and the front mode. In the drawing, the hatched portion indicates “No Action” that the operating state of the RES 2 does not change.
As described above, according to the in-vehicle acoustic system according to the present embodiment, when the front mode is set, the rear seat operation unit 2 is linked with the control related to the operation instruction from the front seat operation unit 1. Since the operation of the source related to the audio / video information output to the speaker 4 / display 5 is controlled, the rear seat user selects the same source as the source selected by the front seat user. Even in this case, the operation of the source can be controlled in the same manner as the user at the front seat.
[0046]
As a result, even when the same source as that on the front side is selected on the rear side, the audio / video information output from the source can be obtained without requiring troublesome work as in the prior art. This contributes to the improvement of the operation convenience by the rear seat operation unit 2.
In addition, since the operation units 1 and 2 cooperate with each other and can issue operation instructions to the same source at the same time, it is necessary to prepare the same source separately on the front side and the rear side as in the prior art. This makes it possible to reduce the cost of the entire system.
[0047]
When the separate mode is set, the rear seat operation unit 2 controls the source of the audio / video information output to the headphone 6 / display 7 regardless of the operation instruction from the front seat operation unit 1. The operation can be controlled.
Moreover, in this system, since each source (acoustic unit) and each operation unit 1 and 2 are connected via the bus | bath 3, compared with the case where these each unit is connected separately, a connection line is reduced and a connection form Can be simplified.
[0048]
In the above-described embodiment, when the rear seat operation unit 2 (FIGS. 1 and 2) is arranged at a predetermined position in the passenger compartment so that users who ride on the left and right sides of the rear seat can operate in common. However, the arrangement of the rear seat operation unit 2 is not limited to this. For example, it may be arranged in two predetermined locations in the passenger compartment so that users who ride on the left and right sides of the rear seat can operate exclusively. In this case, only one power key 21c, 21d is provided.
[0049]
In the above-described embodiment, the case where the audio / video signal is converted into digital data and transmitted from each acoustic unit to each operation unit 1 and 2 via the bus 3 has been described. However, the transmission form is not limited to this. Of course. For example, it may be directly transmitted to the audio output unit 26 and the video output unit 27 in the operation units 1 and 2 using an analog line different from the bus 3. When a bus with a small communication capacity is used by separating the analog line for sending audio / video signals and the bus 3 for sending control signals between the operation units 1 and 2 and the sound units in this way. Even so, the vehicle-mounted acoustic system according to the present invention can be constructed.
[0050]
【The invention's effect】
As described above, according to the present invention, the user-friendliness in the rear seat acoustic system (RES) can be improved by devising the system configuration to realize a specific operation mode, and at the same time, the cost can be reduced. It is possible to contribute to the realization.
[Brief description of the drawings]
FIG. 1 is a block diagram schematically showing a configuration of an in-vehicle acoustic system according to an embodiment of the present invention.
2 is a plan view schematically showing an external configuration of a rear seat operation unit in the system of FIG. 1; FIG.
FIG. 3 is a state transition flow diagram for explaining operations in a separate mode and a front mode performed by the in-vehicle acoustic system of FIG. 1;
4 is a state transition flowchart showing an example (power-off operation) of processing in a separate mode performed by the in-vehicle acoustic system of FIG. 1; FIG.
FIG. 5 is a state transition flowchart showing an example of processing in the front mode (power-off operation) performed by the in-vehicle acoustic system of FIG. 1;
FIG. 6 is a diagram showing a relationship between state transitions related to power on / off operations in a separate mode and a front mode.
[Explanation of symbols]
1 ... Front seat operation unit (first operation means)
2 ... Rear seat operation unit (second operation means)
3 ... Bus (transmission path)
4. Speaker (first information output means)
5. Display (first information output means)
6 ... Headphone (second information output means)
7. Display (second information output means)
11-19 ... Audio / video source (sound unit)
21. Operation unit
21b ... Front mode selection key
21c, 21d ... Power key
21f, 21g ... Audio / Video source selection key
RES ... Rear seat entertainment system (rear seat sound system)

Claims (6)

A plurality of sound units each capable of independently outputting audio / video information;
First operating means for giving an operation instruction to any one of the plurality of sound units from a front seat in a vehicle interior;
First information output means for outputting audio / video information relating to the operating state of the acoustic unit to which an operation instruction is given from the first operation means;
A second operation means for giving an operation instruction to any of the plurality of acoustic units from a rear seat in the vehicle interior;
Second information output means for outputting audio / video information related to the operating state of the acoustic unit to which an operation instruction is given from the second operation means;
The second operation means has an operation unit having an operation key for selectively setting one of the first and second operation modes;
When the first operation mode is set, the operation of the sound unit related to the audio / video information output to the second information output means regardless of the operation instruction from the first operation means. Control
When the second operation mode is set, the sound related to the audio / video information output to the first information output means in conjunction with the control related to the operation instruction from the first operation means. An on-vehicle acoustic system that controls the operation of a unit. The second operation means includes an operation key on the operation unit for turning on / off a power source and adjusting a volume output from the sound unit,
When the first operation mode is set and the power is turned off or on, the operation of only the audio unit related to the audio / video information output to the second information output means is stopped or started Let
When the second operation mode is set and the power is turned off or on, the audio unit related to the audio / video information output to the second information output means, and the first information The in-vehicle audio system according to claim 1, wherein each operation of the audio unit related to the audio / video information output to the output means is stopped or started. The first information output means includes a speaker and a display for providing audio information and video information relating to the operating state of the acoustic unit to which an operation instruction is given, respectively.
The said 2nd information output means has a headphone and a display which each provide the audio information and video information which concern on the operation state of the acoustic unit to which the operation instruction was given, The display of Claim 1 characterized by the above-mentioned. In-vehicle acoustic system. The plurality of acoustic units, the first operation means, and the second operation means are connected to each other via a predetermined transmission path, and information corresponding to the operation instruction via the transmission path and the The in-vehicle audio system according to claim 1, wherein audio / video information is transmitted. The in-vehicle acoustic system according to claim 1, wherein the second operation means is provided at a predetermined one location that can be shared and operated by users who ride on the left and right sides of the rear seat. The in-vehicle acoustic system according to claim 1, wherein the second operation means is provided at two predetermined locations that can be operated exclusively by users who are on the left side and the right side of the rear seat.

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