JP3921141B2 - In-vehicle audio system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an in-vehicle audio apparatus, and more particularly to an in-vehicle audio apparatus that transmits audio signals to a plurality of wireless headphones via different transmission channels and outputs different audio signals from the plurality of headphones simultaneously.
[0002]
[Prior art]
In recent years, in-vehicle audio apparatuses are equipped with many audio devices such as a CD player, an MD player, a DVD player, an FM / AM radio, and a digital broadcast receiver, and can reproduce various audio sources in the vehicle. is there. In addition, in such a system, apart from outputting audio playback sound from a speaker installed in the vehicle, the audio that a person on the back seat of the vehicle plays with the speaker in the vehicle using headphones is different. There are also systems that allow you to play your favorite audio. Such a system is called a rear entertainment system, and the number of systems in which different audio reproduction can be enjoyed with headphones in each seat is increasing. In the rear entertainment system, an operation unit is provided in each seat, and a person on each seat can perform a selection operation of a favorite audio source, a volume adjustment operation, and the like.
[0003]
[Problems to be solved by the invention]
By the way, in the rear entertainment system as described above, when a system using wireless headphones is used, it is necessary to make it possible to identify the headphones used for each seat in advance. If there are multiple wireless headphones in the car, it is difficult to tell which seat the headphones are for, and if you mix up the headphones, the audio output from the headphones that others are using without knowing It is possible to operate on the source. For example, there is a risk that the user intends to operate the volume of the audio source that he / she is listening to through headphones, but may manipulate the volume of the audio source of another person.
[0004]
In addition, in a system that can be operated by a remote controller (remote controller), there is a switch that is provided on the remote controller to switch which seat source is operated. If you forget to switch and operate, there is a risk of operating the source of someone else's headphones. If each headphone is paired with a remote control, it is possible to perform operations on the audio source being listened to, but even in this case, if the remote control is accidentally changed, As with the problem, there is a problem that an audio source that is being listened to by others is accidentally manipulated.
[0005]
Accordingly, an object of the present invention is to provide an in-vehicle audio device that is easy to use even when a plurality of wireless headphones are used.
[0006]
It is another object of the present invention to provide an in-vehicle audio apparatus that does not erroneously operate an audio source being output by a headphone being used by another person when using a plurality of wireless headphones.
[0007]
[Means for Solving the Problems]
According to the present invention, the above object is to store identification information in an in-vehicle audio device capable of transmitting an audio signal from a vehicle-mounted device to a plurality of wireless headphones via different transmission channels and simultaneously outputting different audio signals from the plurality of wireless headphones. Wireless headphones having a memory, a communication unit that communicates the identification information with the vehicle-mounted device, and a reception unit that receives an audio signal transmitted from the vehicle-mounted device, and a transmission unit that transmits the audio signal to the wireless headphones A communication unit that is installed for each seat and communicates with the wireless headphones existing within a predetermined communication range, and a wireless headphone position that detects which wireless headphones exist within the communicable range of the communication unit A detection unit, a plurality of operation units that are installed for each seat and are used to instruct operation of the in-vehicle device, and the operation unit. When an operation instruction to the in-vehicle device is made, a control unit that performs control according to the operation instruction with respect to an audio source output from the wireless headphones existing in a seat where the operated operation unit is installed; and a vehicle device having, wherein, when detecting the presence of a plurality of wireless headphones within communication range of one communication unit by the wireless headphone position detecting unit that Hassu warning vehicle Achieved by an audio device.
[0008]
That is, the audio source output from the wireless headphones existing in the seat where the operated operation unit is installed when the seat position where the wireless headphones exist is detected and operated by the operation unit installed for each seat the control can be performed, in the case where a plurality of wireless headphones is present in the seat operation unit operated is installed Ru can alert.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
(A) First Embodiment FIG. 1 is a schematic explanatory view of a first embodiment of the present invention. Fig.1 (a) is the figure which looked at the inside from the upper part, and FIG.1 (b) is the figure which looked at the rear seat from the side. In FIG. 1, 100 is a wireless headphone, 20a is a left seat operation section, 20b is a right seat operation section, 30a is a left seat RFID read / write section, and 30b is a right seat RFID read / write section. In addition, the range surrounded by the dotted line indicates the communicable range of the RFID read / write units 30a and 30b installed in the respective seats. Reference numeral 200 denotes an in-vehicle device having an antenna for transmitting an audio signal to each wireless headphone 100.
[0012]
The wireless headphone 100 includes an RFID unit (not shown), stores identification information for identifying the headphone, and also when the RFID head is in the communicable range of the RFID read / write units 30a and 30b, the RFID read / write unit The identification information of the wireless headphones 100 can be read by 30a and 30b. In this way, it is detected which wireless headphone 100 having which identification information exists in which of the left and right seats.
[0013]
RFID (radio frequency identification) is a non-contact automatic recognition system by wireless communication, and is used in many systems such as an article management system and an entrance / exit management system. In the present invention, by using this RFID system, an RFID tag storing identification information is embedded in a wireless headphone, and which wireless headphone is used in which seat by an RFID read / write unit installed in each seat. Determine. When an operation unit provided in each seat is operated, control instructed to be performed is automatically performed on an audio source output from the wireless headphones used in the seat. RFID includes an electromagnetic coupling type, an electromagnetic induction type, a microwave type, and the like. In the present invention, the communicable distance is about the range of each seat (several tens of centimeters to about 1 meter), and the identification information Any type of RFID may be used as long as it can read and write. From the viewpoint of communicable distance, it is suitable to use an electromagnetic induction type RFID.
[0014]
For example, when a person in the left seat uses the wireless headphone 100a, it detects that the headphone 100a exists in the communicable range (left seat) of the left seat RFID read / write unit 30a. When the operation unit 20a is operated, the in-vehicle device 200 performs control corresponding to the operation instruction on the audio source output from the wireless headphones 100a existing in the left seat.
[0015]
FIG. 2 is a diagram showing a schematic configuration of the in-vehicle device in the in-vehicle audio device of the present invention. In the figure, 201 is a control unit for controlling the whole, 202 is an audio playback device, and includes a CD player 202a, an MD player 202b, an FM / AM radio 202c, and a DVD player 202d. Reference numerals 203 and 204 denote audio signal transmission units for wireless headphones, which modulate and transmit audio signals using different channels in accordance with the control of the control unit 201.
[0016]
The control unit 201 controls the audio source output from the wireless headphones existing in the installed seat of the operated operation unit in response to a user operation instruction from the operation units 20a and 20b. The audio signal transmission units 203 and 204 transmit audio signals through different transmission channels, and transmit audio signals through transmission channels that can be received by the wireless headphones 100a and 100b in accordance with instructions from the control unit 201. . The audio signal transmission units 203 and 204 may determine the transmission channel in advance corresponding to the identification information of the wireless headphones, but when the position of the wireless headphones is detected, the RFID read / write units 30a and 30b You may control to switch the reception channel by the side of the wireless headphones which exists in the corresponding seat.
[0017]
In addition, when there are a plurality of wireless headphones within the communicable range of one RFID read / write unit, when the operation unit is operated, it may be controlled to emit a warning sound to both wireless headphones.
[0018]
FIG. 3 is a diagram illustrating a schematic configuration of the wireless headphones 100. In the figure, 101 is a receiving unit that receives an audio signal transmitted from an in-vehicle device, and 102 is an amplifier that amplifies the received audio signal and outputs an audio signal from the Lch speaker 103 and the Rch speaker 104. When a wireless headphone enters the communicable range of the RFID read / write unit 30a or 30b installed in each seat, communication with the RFID read / write unit 30a or 30b is performed, and the identification information of the wireless headphone is on the in-vehicle device 200 side. Is read out. When the operation unit installed in each seat is operated, the control unit 201 of the in-vehicle device 200 controls the audio source being output from the wireless headphones existing in the seat of the operated operation unit. .
[0019]
105 is a control unit that controls the entire wireless headphones, 106 is a memory that stores headphone identification information and reception channels, and 107 is an RFID communication unit that communicates with the RFID read / write units 30a and 30b attached to each seat of the vehicle. It is.
[0020]
The control unit 105 controls reading of the identification information stored in the memory 106 to the RFID read / write unit 30 on the vehicle-mounted device side via the RFID communication unit 107, or receives a reception channel according to a write command from the RFID read / write unit 30. Information is written to the memory 106. In addition, the control unit 105 controls the reception unit 101 to receive the reception channel written in the memory 106, and receives and outputs a user desired audio reproduction signal.
[0021]
FIG. 4 is a diagram showing an operation flow in the first embodiment of the present invention.
First, it is determined whether or not any of the operation units (the left seat operation unit 20a and the right seat operation unit 20b) has been operated by the user (step S101). repeat.
[0022]
When an operation from the user is performed in step S101, the control unit 201 confirms which wireless headphones are present at the seat position where the operated operation unit is installed (step S102). Specifically, by reading the identification information of the wireless headphones existing in the communication range of the RFID read / write unit 30a or 30b installed at the seat position of the operated operation unit, the wireless headphones in the seat of the audio output target are read. Detect.
[0023]
Next, the control unit 201 determines whether there is one wireless headphone present in the target seat (step S103).
[0024]
If it is determined in step S103 that there is one wireless headphone present in the target seat, the control unit 201 uses the reception channel of the wireless headphone present in the target seat to determine the audio source to be operated. A reproduction audio signal is transmitted (step S104).
[0025]
If it is determined in step S103 that there are a plurality of wireless headphones in the target seat, a display screen (not shown) indicates that the operation is not accepted because there are a plurality of wireless headphones in the target seat. Then, the user is notified of the suspension of the instruction operation control of the audio source (step S105).
[0026]
With the above configuration, when a user tries to enjoy audio playback using wireless headphones, the audio source can be connected to the operation unit installed on the seat using one wireless headphone from multiple wireless headphones. It is possible to easily perform audio playback and operation simply by instructing playback of the audio.
[0027]
(B) Second Embodiment FIG. 5 is a schematic explanatory diagram of a second embodiment of the present invention.
The second embodiment will be described as an in-vehicle audio apparatus in which an audio source operation instruction is given by one or a plurality of remote controllers having the same specifications.
[0028]
In the figure, 400 is an in-vehicle device, 500a and 500b are wireless headphones, and 600 is a remote controller. Reference numeral 401 denotes a control unit that controls the entire vehicle-mounted device, and reference numeral 402 denotes an audio playback device 402 including a CD player 402a, an MD player 402b, an FM / AM radio 403, a DVD player 404d, and the like. Reference numerals 403 and 404 denote audio signal transmission units that modulate the audio signal under the control of the control unit 401 and transmit the modulated audio signal to the wireless headphones 500a and 500b using different transmission channels. Reference numeral 405 denotes a receiving unit that receives an operation command signal from the remote controller 600 and receives identification information from the wireless headphones 500a and 500b.
[0029]
FIG. 6 is an explanatory diagram of wireless headphones. The wireless headphones 500a and 500b each include a memory 501 for storing individual identification information, a transmission unit 502 for transmitting the identification information to the in-vehicle device, a switch 503 for instructing transmission of the identification information, and the in-vehicle device 400. An audio signal receiving unit 505 that receives an audio signal transmitted from the audio signal transmitting units 403 and 404 is provided. The transmission unit 502 transmits identification information by infrared communication in the same manner as the remote controller 600, and the reception unit 404 of the in-vehicle device 400 receives the identification information from the wireless headphones 500a and 500b and the operation command from the remote controller 600. It can be done.
[0030]
When the user operates the audio source output by the wireless headphones used by the user, the user first presses the identification information transmission switch 503 provided on the wireless headphones, and the wireless device to be operated from now on the in-vehicle device. Headphone identification information is transmitted. Thereafter, the remote controller 600 is operated to transmit an operation command to the in-vehicle device.
[0031]
When the control unit 401 of the in-vehicle device receives the identification information from any of the wireless headphones, it starts a timer (not shown) and receives an operation command transmitted from the remote controller 600 until a predetermined time is reached. Control corresponding to the operation command is performed on the audio source output from the wireless headphones that have transmitted the identification information. Also, when an operation command is received from the remote controller 600 when identification information is not sent, or after a predetermined time or more has elapsed since the identification information from the wireless headphones has been received, the operation command is received from the remote controller. In such a case, by pressing the wireless headphone identification information transmission switch 403 and then operating the remote controller 600, the sound is output to each wireless headphone by voice, or displayed on a display device or the like installed in each seat. Guide users.
[0032]
FIG. 7 is a diagram illustrating an operation flow of the control unit of the in-vehicle device in the second embodiment.
First, the control unit 401 determines whether or not identification information (recognition code) has been received from the wireless headphones 500a or 500b via the receiving unit 405 (step S201). Is started (step S202).
[0033]
Next, the control unit 401 determines whether or not a predetermined time (for example, 5 seconds) has elapsed since receiving the identification information (step S203). If the predetermined time has not elapsed, the remote controller 600 It is determined whether or not an operation command has been received from (step S204). If no operation command is received from the remote controller 600 in step S204, the process returns to step S203 and continues.
[0034]
When the operation command is received from the remote controller 600 in step S204, the control unit 401 corresponds to the operation command received in step S204 for the audio source output from the wireless headphones having the identification information received in step S201. Control is performed (step S205).
[0035]
For example, when the identification information switch 503 of the wireless headphones 500a is pressed and the identification information is transmitted to the in-vehicle device 400 and received by the receiving unit 405, an operation signal is subsequently received from the remote controller 600 within a predetermined time. The control unit 401 performs control to execute an operation instruction command on the audio source output from the wireless headphones 500a.
[0036]
After a predetermined time has elapsed in step S203 or when the control for the operation command received in step S205 is completed, the timer is reset (step S206), and the process returns to step S201 and continues.
[0037]
If no identification information (recognition code) is received from the wireless headphones in step S201, it is determined whether or not an operation command has been received from the remote controller 600 (step S207). If no operation command is received, step S201 is determined. On the other hand, when the operation command is received from the remote controller 600, the control unit 401 performs the remote control operation after pressing the switch of the wireless headphones on the display device installed in each seat (not shown). In this way, guidance is given to each headphone and notification is given to each headphone by an audio signal (step S208), and then the process returns to step S201 to continue the processing.
[0038]
As described above, the identification information is transmitted by pressing the switch of the wireless headphones, and then the operation for the audio source output from the desired wireless headphones can be performed only by performing the operation with the remote controller within a predetermined time. it can. Further, even when a plurality of wireless headphones are used in the vehicle, it is possible to prevent an erroneous operation on the audio source being output from the wireless headphones used by another person.
[0039]
In the description of the above embodiment, the case where the number of wireless headphones used in the vehicle is two has been described, but it goes without saying that the present invention can be applied even if the number of headphones is larger than this.
[0040]
The present invention has been described with reference to the embodiments. However, the present invention can be variously modified in accordance with the gist of the present invention described in the claims, and the present invention does not exclude this.
[0041]
【The invention's effect】
According to the present invention, identification information is stored individually for each wireless headphone, and an audio source that is automatically output from the wireless headphone at that seat is automatically operated according to the operation of the operation unit installed at each seat. Since the operation-instructed control is performed, the user can easily control the desired audio source simply by operating the operation unit of the seat using the wireless headphones. Also, it is possible to prevent an operation from being performed on an audio source that is erroneously output from the headphones of another person.
[0042]
Furthermore, according to the present invention, when an operation signal is received from a remote controller within a predetermined time after receiving identification information from a wireless headphone, an operation is performed on an audio source output from the wireless headphones that transmitted the identification information. Since the instructed control is performed, it is possible to prevent an erroneous operation on the audio source output from the headphones of another person.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of a first embodiment of the present invention.
FIG. 2 is a diagram showing a configuration of a main part of the in-vehicle device in the first embodiment of the present invention.
FIG. 3 is a diagram showing a configuration of a wireless headphone according to the first embodiment of the present invention.
FIG. 4 is a diagram showing an operation flow in the first embodiment of the present invention.
FIG. 5 is a schematic explanatory diagram of a second embodiment of the present invention.
FIG. 6 is a diagram showing a configuration of a wireless headphone according to a second embodiment of the present invention.
FIG. 7 is a diagram showing an operation flow in a second embodiment of the present invention.
[Explanation of symbols]
20a ... Left seat operation unit 20b ... Right seat operation unit 30a ... Left seat RFID read / write unit 30b ... Right seat RFID read / write unit 100a, 100b ... Wireless headphones 200 ... In-vehicle machine

Claims (1)

In-vehicle audio devices that can transmit audio signals from in-vehicle devices to multiple wireless headphones using different transmission channels and simultaneously output different audio signals from multiple wireless headphones.
A memory for storing identification information;
A communication unit that communicates the identification information with the in-vehicle device;
A receiver for receiving an audio signal transmitted from the in-vehicle device;
Wireless headphones having
A transmitter for transmitting an audio signal to the wireless headphones;
A communication unit that is installed for each seat and communicates with the wireless headphones existing within a predetermined communication range;
A wireless headphone position detection unit that detects which wireless headphones exist within the communicable range of the communication unit;
A plurality of operation units that are installed for each seat and instruct operation to the in-vehicle device,
When an operation instruction to the in-vehicle device is given by the operation unit, control according to the operation instruction is performed on an audio source output from the wireless headphones existing in a seat where the operated operation unit is installed A control unit;
An in-vehicle device having
Equipped with a,
Wherein the control unit, the vehicle-mounted audio device when it is detected that there is a plurality of wireless headphones within communication range of one communication unit by the wireless headphone position detecting unit, characterized in Rukoto that Hassu warning.

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