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JP2001287598

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Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2001287598
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
vehicle audio apparatus suitable for use in a so-called car stereo system or the like, a content
reproduction method and an audio reproduction apparatus therefor.
[0002]
2. Description of the Related Art A car stereo system (audio apparatus) consisting of a radio
tuner, a cassette tape recorder, a CD player or the like has been widely used, for example, in a
car, which is a typical vehicle.
[0003]
SUMMARY OF THE INVENTION In the above-described conventional audio system, since the
main unit for controlling the reproduction of music (content) and a plurality of speakers are
connected by a cable, the audio system is simultaneously attached when the vehicle is purchased
There is also the hassle of laying the cables in a narrow cabin, either in the case of the latter or in
the case of the later installation of the desired audio system.
Further, even when designing the cabin, it is necessary to consider the place where the cable for
the audio system is laid, the workability for laying the cable, and the like, which causes the
degree of freedom in the design to be impaired.
09-05-2019
1
[0004]
Also, in the conventional audio system, once the system configuration is determined and attached
to the vehicle, the subsequent change of the system configuration is not easy. For example, when
the user newly desires to play back a compact disc (CD) on a main unit having only a radio tuner
and a cassette tape recorder function, a portable CD player is a general method. And a
transmitter that causes the radio tuner on the audio system to receive the output signal by FM
modulation, or an adapter that causes the head of the cassette tape recorder to read the output
signal of the CD player into the vehicle compartment. 2. Description of the Related Art A method
of indirectly reproducing a player's output signal by an audio system has become widespread.
[0005]
However, the above-mentioned indirect reproduction method needs to bring in a portable CD
player, an FM transmitter, etc., and it is necessary to secure a place in a narrow vehicle
compartment, which restricts the occupant's original seating space. As well as giving it, it does
not look good either, and there is a problem with the sound quality of the music to be played
back.
[0006]
SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle
acoustic device that is easy to attach, a method of reproducing the content thereof, and an audio
reproduction device.
[0007]
SUMMARY OF THE INVENTION In order to achieve the above object, a vehicle acoustic device
according to the present invention is characterized by the following configuration.
[0008]
That is, audio control means including the first wireless communication device (the audio control
means may be a portable terminal or may be provided in the vehicle compartment), and a
plurality of speaker units including the second wireless communication device The first and
second wireless communication devices are capable of wireless communication based on a
predetermined wireless communication procedure (for example, Bluetooth etc.), and the plurality
of speaker units are the first wireless communication of the audio control means The wireless
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signal transmitted from the device is received by the second wireless communication device, and
the content included in the received wireless signal is reproduced according to the characteristic
information set individually for each speaker unit.
[0009]
In the above apparatus configuration, for example, the audio control unit can be set to divide the
plurality of speaker units into a plurality of groups of at least one speaker unit, and different
contents are set in the plurality of set groups. It is good to send out a wireless signal including.
[0010]
Further, for example, the plurality of speaker units are provided corresponding to the seat in the
vehicle cabin, and the audio control means is a speaker unit corresponding to a specific seat
among the plurality of speaker units, It is preferable to transmit a wireless signal including
content different from that of the speaker unit.
[0011]
Also, for example, the audio control means transmits a first wireless signal including the same
content to the plurality of speaker units, and a second wireless signal including the characteristic
information individually for each of the speaker units. And the plurality of speaker units perform
sound field processing for the content included in the first wireless signal based on the individual
characteristic information included in the second wireless signal. After applying in the unit, it is
good to output as a voice.
[0012]
In this case, preferably, the characteristic information includes the arrangement of all of the
plurality of speaker units and information on sound field processing in the arrangement, and the
plurality of speaker units output the sound from the own unit It is preferable to perform sound
field processing in consideration of other units based on the characteristic information prior to
step b).
[0013]
Further, for example, the plurality of speaker units are provided corresponding to the seat in the
vehicle compartment, and the audio control means is configured to select a specific seat (for
example, a seat on which a child seat is mounted) among the plurality of speaker units. It is
preferable to control a speaker unit corresponding to the above so that sound can be reproduced
at a volume, sound quality or sound field different from that of the other speaker units.
09-05-2019
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[0014]
Further, for example, when transmitting the wireless signal, the audio control unit may transmit
the content to be transmitted by the wireless signal to the plurality of speaker units in a state of
being divided into information amounts of a predetermined unit. .
[0015]
Further, for example, when the plurality of speaker units receive a plurality of types of wireless
signals from different transmission sources, it is preferable that the content included in any of
the wireless signals be reproduced based on a preset priority.
[0016]
Furthermore, a third wireless communication device for receiving a wireless signal transmitted
from the first wireless communication device of the audio control means is provided, and audio
can be reproduced at least by headphones based on the wireless signal received by the wireless
communication device. Audio playback device.
[0017]
Further, in order to achieve the above-mentioned object, the content reproduction method for a
vehicle acoustic device according to the present invention is characterized by the following
configuration.
[0018]
That is, an audio control unit and a plurality of speaker units, each having a wireless
communication device capable of wireless communication based on a predetermined wireless
communication procedure (for example, Bluetooth etc.) are prepared, and in the plurality of
speaker units While receiving, it is characterized by reproducing | regenerating the content
contained in the received radio signal according to the characteristic information set to each
speaker unit separately.
[0019]
According to the present invention described above, it is possible to provide a vehicle acoustic
device that is easy to attach, a method of reproducing content thereof, and a device for
reproducing audio.
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[0020]
That is, according to the invention of claim 1 and claim 13, the cable connecting the audio
control means and the plurality of speaker units can be eliminated, and the installation in the
vehicle interior can be facilitated.
As a result, the vehicle designer does not have to consider the cable installation location, and the
design freedom can be improved.
[0021]
Further, according to the invention of claim 2 and claim 14 (for example, by arranging the
speaker unit corresponding to the seat: claim 3), the individual occupants corresponded to their
preferences in the set group unit. You can listen to the content.
[0022]
Also, according to the invention of claims 4 and 15, the content can be reproduced in an
optimum sound field according to the installation place of the speaker unit.
[0023]
Further, according to the invention of claim 5, for example, it is possible to output a sound from
which a generation of a pseudo silence state or a specific frequency component has been
removed.
[0024]
According to the invention of claim 6 and claim 16, the speaker unit corresponding to the
specific seat can be driven in a state according to the preference of the occupant seated on the
seat, for example, a child seat In the mounted seat (claim 7), it is possible to output only sound
that does not adversely affect the baby.
[0025]
Further, according to the invention of claim 8, since the audio control means is portable, it is
possible to transfer the contents to be reproduced to a plurality of speaker units by wireless
communication if carried in the vehicle compartment, It is possible to eliminate the burden of
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transferring content to the device.
[0026]
Further, according to the invention of claims 9 and 17, the content can be efficiently transmitted
according to the time that can occupy the frequency band used by the wireless communication.
[0027]
According to the invention of claim 11 and claim 18, for example, the wireless signal is
transmitted as the wireless signal from the audio control means from the unit provided on the
vehicle compartment side and the portable unit respectively. However, the same content received
from any unit can be reproduced by a plurality of speaker units.
[0028]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vehicle acoustic device
according to the present invention will be described in detail below as an embodiment applied to
a typical automobile with reference to the drawings.
[0029]
[First Embodiment] FIG. 1 is a view showing a configuration example in which a vehicle acoustic
device according to a first embodiment is mounted in a passenger compartment.
[0030]
In the figure, the basic configuration of the vehicle acoustic device according to the present
embodiment is embedded in the interior of the vehicle 100 so as to correspond to the audio unit
1 embedded in the center console and each seat in the interior of the vehicle. The portable audio
terminal 3 can be included in the basic configuration according to the needs of the passenger.
[0031]
In this embodiment, as an example, the speaker units 2A and 2B are disposed in the vicinity of
the driver's seat and the front passenger seat of the vehicle 100, and the speaker units 2C and
2D are disposed behind the left and right rear seats. The number and arrangement of the speaker
units are not limited to the configuration example shown in FIG. 1, and may be appropriately
determined according to the sheet arrangement, the size, and the like in the vehicle interior.
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[0032]
FIG. 2 is a diagram showing a block configuration of each component constituting the vehicle
acoustic device in the first embodiment and a flow of a radio signal between the components.
[0033]
<Audio Unit 1> First, the device configuration of the audio unit 1 will be described.
[0034]
A plurality of operation switches 12 allow the occupant to set selection of content (music) to be
reproduced by the vehicle audio device, sound quality, sound volume, reproduction balance,
selection of reproduction units such as CD and MD, and the like.
A display 13 displays a setting state by the operation switch 12, a reproduction state by the
reproduction unit, and the like. The display 13 may have a touch panel on its surface to bear a
part of functions of the operation switch 12 (note that the display in the present embodiment) A
display example of 13 will be described later with reference to FIG.
[0035]
14 is an external communication unit for obtaining contents to be reproduced by the vehicle
audio system from a communication facility outside the vehicle, and a wireless communication
device or a portable information terminal (connectable to a mobile communication line in the
city) A communication module capable of receiving data in a wired manner using an information
device such as a PDA) or a mobile computer and a cable or wirelessly using an infrared ray or the
like may be employed.
[0036]
An audio storage medium (memory) 15 stores content obtained from the outside via the external
communication unit 14 and may be configured to be removable.
Content information such as music is stored in the sound storage medium 15 in a state of being
compressed in advance by a method such as MP3, Solid Audio, Liquid Audio or the like.
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A wireless communication device 16 performs wireless communication with the speaker units 2A
to 2D and the portable audio terminal 3 in accordance with a predetermined communication
procedure, and in the present embodiment, it is used near a distance range of about several tens
of meters. Bluetooth wireless communication is performed as an example of the distance wireless
communication system.
[0037]
A reproduction unit 17 reads out content information such as music stored in advance in a
storage medium such as a CD, an MD, or a cassette tape.
Reference numeral 11 denotes a microcomputer for realizing content reproduction by the
speaker units 2A to 2D and the portable audio terminal 3 as described later by controlling each
block of the audio unit 1 described above, and is stored in advance in a memory. Operate
according to the control program.
[0038]
Here, when transmitting content information to the speaker units 2A to 2D, the audio unit 1
transmits the content information to be transmitted in a compressed state according to a
predetermined method.
That is, the microcomputer 11 sends out the compressed content information stored in the audio
storage medium 15 from the wireless communication device 16 as it is, but in the case of the
content information read from the reproduction unit 17, it sends it. In advance of the above,
compression is performed in a predetermined format such as the above-mentioned MP3, Solid
Audio, Liquid Audio, etc. (In the case of MD, the data compression format stored in MD may be
left as it is).
[0039]
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The audio unit 1 is driven by a power supplied from a battery (not shown) of the vehicle 100.
In addition, since the individual structure and basic function itself of each block of the audio unit
1 described above are general at present, detailed description in the present embodiment will be
omitted.
[0040]
<Portable Audio Terminal 3> Next, the device configuration of the portable audio terminal 3 will
be described.
[0041]
32 is a selection of content (music) to be reproduced on the terminal, setting of reproduction
states such as reproduction start, stop, fast forward etc. of the selected content, and a plurality of
settings in which the user can set sound quality, volume, reproduction balance, etc. It is an
operation switch.
Reference numeral 33 denotes a display for displaying a setting state or a reproduction state by
the operation switch 32.
An external communication unit 44 acquires contents to be reproduced by the terminal from an
external communication facility, and is a wireless communication device connectable to a mobile
communication line in the city, or a personal digital assistant (PDA) or a mobile A communication
module capable of receiving data in a wired manner using an information device such as a
computer and a cable or wirelessly using an infrared ray or the like may be employed.
[0042]
A wireless communication device 35 performs wireless communication with the audio unit 1 and
the speaker units 2A to 2D according to the same predetermined communication procedure
(Bluetooth method) as the audio unit 1.
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An audio storage medium (memory) 36 stores contents obtained from the outside via the
external communication unit 34, and may be configured to be removable.
Content information such as music is stored in the sound storage medium 36 in a state of being
compressed in advance by a predetermined method such as MP3, Solid Audio or Liquid Audio.
Reference numeral 37 is a speaker and / or headphones for outputting sound.
[0043]
Then, 31 controls the respective blocks of the portable audio terminal 3 described above so that
the reproduction function of the content information stored in the audio storage medium 36
alone or the content by the speaker units 2A to 2D as described later It is a microcomputer that
realizes reproduction, and operates according to a control program stored in advance in a
memory.
[0044]
Here, when transmitting content information to the speaker units 2A to 2D, the portable audio
terminal 3 transmits the content information to be transmitted in a compressed state according
to a predetermined method.
That is, the microcomputer 31 sends out the compressed content information stored in the sound
storage medium 36 from the wireless communication device 35 as it is in the data format.
Further, when the microcomputer 31 outputs the sound of the compressed content information
stored in the sound storage medium 36 by the speaker (or headphone) 37, the compressed
content information is combined in the procedure corresponding to the compression format. And
play according to the decoded data.
[0045]
The portable audio terminal 3 is driven by power supplied from a battery (not shown) in the
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terminal.
Further, since the individual structure and basic function itself of each block of the portable
audio terminal 3 described above are general at present, detailed description in the present
embodiment will be omitted.
In addition, the portable audio terminal 3 may include a reproduction unit that reads out content
information such as music stored in advance in a storage medium such as a CD, an MD, or a
cassette tape.
[0046]
<Speaker Units 2A to 2D> Next, the device configuration of the speaker units 2A to 2D will be
described.
[0047]
22 receives a wireless signal including content (music) from the audio unit 1 or the portable
audio terminal 3 according to the same predetermined communication procedure (Bluetooth
method) as the audio unit 1 and the portable audio terminal 3 and will be described later The
wireless communication device transmits the wireless signal received by the own speaker unit to
the other speaker unit in response to a request from the other speaker unit.
[0048]
Reference numeral 23 denotes a speaker that outputs contents such as music reproduced from a
wireless signal received by the wireless communication device 22 by voice.
Reference numeral 21 denotes a microcomputer which realizes a communication function with
another speaker unit and content reproduction as will be described later by controlling the
wireless communication device 22 and the speaker 23 described above, and control stored in
advance in a memory Operate according to the program.
[0049]
Here, when the microcomputer 21 of the speaker units 2A to 2D receives the content
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information in a compressed state received in a predetermined format received from the audio
unit 1 or the portable audio terminal 3, the microcomputer 21 performs compounding in the
procedure corresponding to the compressed format. The audio is reproduced from the speaker
23 in accordance with the decoded data.
[0050]
The speaker units 2A to 2D are driven by power supplied from a battery (not shown) of the
vehicle 100.
Moreover, since the individual structure and basic function itself of each block of the speaker
units are generally common at present, detailed description in the present embodiment will be
omitted.
[0051]
The arrows shown in FIG. 1 conceptually indicate the flow of radio signals transmitted and
received among the components of the audio unit 1, the portable audio terminal 3, and the
speaker units 2A to 2D described above. A signal (hereinafter referred to as a music signal)
including information of content (music) commonly transmitted to the respective speaker units
(including the portable audio terminal 3) in at least a wireless signal transmitted and received to
realize the mode A signal (hereinafter referred to as sound reproduction characteristic signal)
including sound reproduction characteristic information of each of the speaker units according to
desired sound quality, volume, reproduction balance, etc. set by the occupant in the audio unit 1
and the speaker units 2A to 2D Each signal of the signal (hereinafter, synchronization signal)
including synchronization information of individual audio output timing according to
These wireless signals include, in addition to the above-described information contents to be
transmitted, identification information for specifying a transmission source and a transmission
destination, a predetermined transmission error discrimination code, and the like.
[0052]
Note that the wireless communication method adopted in each component is not limited to
Bluetooth, and the transmission delay or the like of the content information to be reproduced
09-05-2019
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does not occur in the space of the compartment of the vehicle equipped with the vehicle audio
device. Any method may be adopted as long as high-speed and large-capacity data transfer is
possible.
[0053]
Further, in the present embodiment, transmission and reception of content information to the
speaker units 2A to 2D are performed in a compressed state in a predetermined format as
described above, but the wireless communication system employed can transfer data at higher
speed and with a larger capacity. If the speaker unit 2A to 2D transmits the music signal
including the decoded content information from the audio unit 1 or the portable audio terminal
3, the hardware or software realizing the decoding process You may omit the module of.
[0054]
<Reproduction of Content> Next, the reproduction operation of the content realized by the
operation of each component described above will be described with reference to FIGS. 3 to 5
and FIG.
Note that although the vehicle audio device according to the present embodiment can reproduce
various types of content (conversation, sports relay, news, etc.), in the following description, the
most common music as a representative content (Music) will be described as an example.
[0055]
First, the basic music reproduction operation in the present embodiment will be outlined.
[0056]
FIG. 9 shows a display example of the display 13 of the audio unit 1.
The passenger operates the power switch when he / she desires to reproduce music by the
vehicle sound device, thereby displaying the setting screen of FIG. 9 on the audio unit 1.
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[0057]
On this display screen, the passenger selects any desired music source from among a plurality of
types of music sources desired to be reproduced, and registers the external player as needed.
In the example shown in FIG. 9, the CD is selected and the external player 1 is selected.
Furthermore, in the present embodiment, the portable audio terminal 3 is selected as the external
player 1 so as to be identifiable by the identification number or the like by the setting operation
of the occupant on the screen (not shown) When a signal is sent out, the priority to be
reproduced is set.
[0058]
Then, according to the selection operation of the music source described above, the music list of
the CDs loaded in advance in the reproduction unit 17 (in this case, the CD player) is
automatically displayed in the area on the left side of the display. The occupant uses a cursor
feed key or the like near the right end of the audio unit 1 to select a desired music piece to be
reproduced.
[0059]
In addition, the passenger uses the operation switch 12 (not shown in FIG. 9) to make sound
reproduction characteristics such as sound quality, volume, reproduction balance, etc. of the
sound output at the time of sound output by the speaker units 2A to 2D. Setting etc. can be
performed individually for each speaker unit (note that if no setting is made, it is a
predetermined default setting).
[0060]
Thereafter, the audio unit 1 performs a music signal including information of the selected music,
a stop, a fast forward, etc. by performing an operation such as “play”, “fast forward”,
“stop” etc. by the occupant as necessary. Control signals and the like including control
information are sent to the speaker units 2A to 2D, and sound reproduction characteristic signals
including sound reproduction characteristic information set (or defaulted) by the occupant are
transmitted to the respective speaker units. Send individually.
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Thereby, the speaker units 2A to 2D reproduce the music signal received from the audio unit 1 in
accordance with the sound reproduction characteristic signal and the control signal similarly
received, and output the reproduction signal as sound from the speaker 23.
[0061]
Further, at this time, in the present embodiment, since the portable audio terminal 3 is registered
as the external player 1 as described above, when the terminal is located in the interior of the
vehicle 100 or in the vicinity of the vehicle 100 Also in the above, it is possible to reproduce
music having the same content as the respective speaker units.
Furthermore, when the order of music reproduction set by the occupant in the audio unit 1
earlier is, for example, higher than the portable audio terminal 3, the music signal is not
transmitted from the unit. Then, by transmitting the music signal from the terminal, the music
included in the music signal can be output by the speaker units 2A to 2D (in this case, the
portable audio terminal 3 is a user of the terminal. The sound reproduction characteristic signal
is also sent out according to the setting relating to the reproduction characteristic set by.
The priority information for music reproduction set by the occupant may be transmitted from the
audio unit 1 to the speaker units at a predetermined cycle or irregularly, for example, as a
control signal including the priority information.
[0062]
In addition, the division (unit) of the amount of information at the time of transmitting a music
signal from the audio unit 1 (or the portable audio terminal 3) is, for example, one music or one
music if the content to be reproduced is music. Even if it is a unit of a plurality of songs, it may
be a predetermined time unit of several seconds to divide one song into a plurality of segments,
and in the case of a radio broadcast, it is a shorter time unit to secure a real time broadcast.
Although it is desirable, the amount of information to be transmitted is determined in accordance
with factors such as how long the vehicle acoustic device according to the present embodiment
can occupy the frequency band used by the adopted wireless communication system, It should be
designed to be organized in units of.
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[0063]
FIG. 3 is a flowchart of music reproduction processing in the audio unit 1 in the first
embodiment, and shows a control procedure executed by the microcomputer 11 in accordance
with a control program stored in advance in the memory.
[0064]
In step S1, it is determined whether any operation of the operation switch 12 has been
performed. If YES in this determination, the process proceeds to step S5, and if NO (no
operation), the process proceeds to step S2.
[0065]
Steps S2 to S4: Since none of the operation switches 12 are operated, the setting state of the
internal flag F indicating whether or not the radio signal is transmitted from the audio unit 1 is
determined (step S2). When F = 1 (the transmission state of the wireless signal), it is determined
whether or not the cancellation signal for stopping the transmission of the wireless signal from
the unit is received from the portable audio terminal 3 (step S3), F = 0 ( When the transmission
of the wireless signal is stopped, the process returns.
When NO at step S3 (when the stop signal is not received), the process proceeds to step S8 to
continue the transmission of the wireless signal, and when YES (when the stop signal is received),
the internal The flag F is set to 0 (step S4), and the process returns.
[0066]
Step S5: Among the operation switches 12, determine the type of the operation switch which
detected the operation in the judgment of step S1, and the operated switch is a switch related to
sound reproduction ("reproduction" switch exemplified in FIG. 9) If it is the case, the process
proceeds to step S6, and if it is the switch for stopping reproduction (the "stop" or "pause" switch
illustrated in FIG. 9), the process proceeds to step S6 and the switch for setting the acoustic
characteristics (the above-mentioned acoustic reproduction characteristics are not possible If it is
the switch shown), the process proceeds to step S11.
[0067]
Step S6, Step S7: Since reproduction is instructed in the audio unit 1, an interruption signal is
transmitted to the terminal in order to prohibit the wireless signal from being transmitted from
09-05-2019
16
the portable audio terminal 3 (step S6). The internal flag F is set to 1 (transmission state of radio
signal) (step S7).
[0068]
Steps S8 to S10: The sound storage medium 15 (or the reproduction unit 17) is loaded with the
music selected as described above on the display screen of FIG. 9 before the switch for sound
reproduction (the “reproduction” switch) is operated. The music signal is read out from the
storage medium, and a music signal including information of the music (information in
compressed data format) is created (step S8), and the created music signals are grouped by a
predetermined unit and wirelessly according to a predetermined communication procedure It
sends from the communication device 16 (step S9), and returns.
Then, when the operation of the switch ("stop" switch) for stopping reproduction is detected in
step S5, the internal flag F is set to 0 (the transmission of the wireless signal is stopped) (step
S10), and the process returns.
That is, when the transmission of the music signal is started in response to the operation of the
"play" switch, the transmission of the music signal including the information of the music by a
predetermined unit amount is performed until the operation of the switch for stopping the
reproduction is detected. , Until all selected songs are sent out.
When the "temporary stop" switch is operated, it is preferable to temporarily interrupt the
transmission of the music signal while keeping the internal flag F = 1 (the transmission state of
the wireless signal).
[0069]
Step S11: When the switch operation relating to the setting of acoustic characteristics is detected
in step S5, the set state of the internal flag F is determined (step S11), and in this determination,
when F = 1 (transmission state of wireless signal) In order to send out the sound reproduction
characteristic signal according to the setting, the process proceeds to step S12, and when F = 0
(the transmission stop state of the radio signal), the process returns.
[0070]
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Step S12 to Step S14: Sound quality, sound volume, reproduction balance of the speaker units 2A
to 2D of the memory (not shown) in the microcomputer 11 in order to realize a desired sound
field according to the operation of the switch regarding the operated acoustic characteristic
setting. Etc. (step S12, step S13), and an acoustic reproduction characteristic signal according to
the updated setting information is individually sent to the respective speaker units (step S14),
and return Do.
[0071]
Here, in a memory (not shown) in the microcomputer 11, arrangement position information on
all units of the speaker units 2A to 2D and setting information on sound reproduction
characteristics for realizing general sound field reproduction in the arrangement Is stored in
advance as a default setting (for example, when the acoustic device for a toy vehicle is mounted
on the vehicle 100), and the update of the setting information in step S12 and step S13
mentioned above is sound quality excluding the arrangement information of the speaker unit ,
Volume, playback balance, and other setting items.
For this reason, even if it is set to any characteristic, a music is reproduced | regenerated by the
optimal sound field according to the installation place of speaker unit 2A thru | or 2D.
[0072]
Further, in the setting (sound field setting) option of the sound reproduction characteristic using
the operation switch 12 in the audio unit 1, the setting for setting the volume to zero for the
desired speaker unit among the four speaker units, There are a setting for generating a pseudosilence state or a setting for generating an audio from which a specific frequency component has
been removed.
[0073]
The reason why these settings can be made in this embodiment is that, as described above, since
the setting information on the sound reproduction characteristic includes the arrangement
position information on all the units of the speaker units 2A to 2D, This is because, when it is
intended to reproduce voice in a desired sound field, it is possible to realize reproduction
characteristics in consideration of other speaker units.
09-05-2019
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That is, for example, in order to generate a pseudo-silence state in a sheet corresponding to a
specific speaker unit, another speaker unit in which the phase of the sound output from the
speaker unit is transmitted to the sheet corresponding to the speaker unit And the sound volume
level may be set based on the arrangement position information.
Further, in order to generate sound from which a specific frequency component has been
removed, filter processing may be performed before the reproduction signal is output from the
speaker 23 by the speaker unit.
Therefore, according to the setting of the sound reproduction characteristic in the audio unit 1,
setting information capable of realizing such a reproduction signal is transmitted to each speaker
unit by the sound reproduction characteristic signal.
[0074]
FIG. 4 is a flowchart of music reproduction processing in the speaker units 2A to 2D in the first
embodiment, and shows a control procedure executed by the microcomputer 21 of each speaker
unit according to a control program stored in advance in a memory.
[0075]
Step S21, Step S22: It is judged whether the sound reproduction characteristic signal addressed
to the own speaker unit has been received from the audio unit 1 (Step S21), and when this
judgment is NO (when the signal is not received) The process proceeds to step S23, and when
YES (when the signal is received), the sound reproduction characteristic of the own speaker unit
is updated according to the setting information included in the received sound reproduction
characteristic signal (step S22), The process proceeds to step S23.
[0076]
Steps S23 and S24: It is determined whether a music signal has been received from the audio
unit 1 or the portable audio terminal 3 (step S23), and if the determination is NO (if the signal is
not received), the process returns. (When the signal is received), the received music signal is not
a signal transmitted from any one component of the audio unit 1 or the portable audio terminal
3, but both of them or the display screen of FIG. It is determined whether it is a plurality of types
of music signals including music signals sent from an external player not set in (step S24).
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[0077]
Step S25: Since each speaker unit receives at least the control signal sent out in response to the
priority being set in the audio unit 1, the priority in playing the music signal is set. If the
determination in step S24 is YES (when the transmission sources of the music signal are of
multiple types), any one of the plurality of types of music signals received in this step according
to the preset priority order One is selected (step S25), and the process proceeds to step S28.
[0078]
Step S26, Step S27: When the determination in step S24 is NO (when plural types of music signal
are not received), it is determined whether one music signal is also received (step S26). When NO
(when one music signal is received within a predetermined time), the process proceeds to step
S28, and when YES (when no music signal is received beyond the predetermined time), another
speaker unit ( In this embodiment, since the music information of a predetermined unit amount
included in the music signal has the same content in each speaker unit, control to request
transmission of the music signal to three speaker units other than the own speaker unit is
performed. Transmits a signal, and when the music signal is transferred from the other speaker
unit to its own speaker unit according to the control signal, the music signal is received (Step
S27), the process proceeds to step S28.
[0079]
Step S28: It is determined whether it is necessary to perform special processing for voice output,
such as whether a child's seat is attached to the seat corresponding to the self-speaker unit, or a
pseudo silent state is set.
More specifically, for example, the judgment as to whether or not the child's seat is attached to
the seat corresponding to the self-speaker unit is provided in the child's seat, for example, a
method of detecting based on the output signal of an ultrasonic sensor provided in the vehicle
compartment. The signal transmitted from the oscillator may be detected by an antenna
embedded in each seat, and a general method such as a method of detecting based on the
magnitude of the detected signal may be adopted, and the detection state is indicated. A control
signal including information may be received from the audio unit 1 at a predetermined cycle or
irregularly.
Further, it may be determined by referring to the sound reproduction characteristic updated in
step S22 whether the pseudo silence state is set.
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[0080]
Step S29: Since it is determined that the special processing is necessary in the determination of
step S28, in this step, a music signal including an amount of information of a predetermined unit
whose reception is detected in step S23 (or obtained from another speaker unit) Is decoded
according to the decoding procedure according to the procedure at the time of compression, and
the reproduced signal according to the desired sound field set in the audio unit 1 by referring to
the sound reproduction characteristic updated in step S22 (ie, The signal is converted into a
signal of reverse phase, a signal of volume level 0, or a signal obtained by filtering a
predetermined frequency component, etc., which realizes a pseudo silence state.
Thereby, the speaker unit corresponding to a specific seat can be driven in a state according to
the preference of the occupant sitting on the seat. For example, in a seat on which a child seat is
mounted, the silent state is pseudo Only voices that do not adversely affect the baby.
[0081]
Step S30: Since it is determined that the special processing is not necessary in the determination
of step S28, in this step, a music piece including an amount of information of a predetermined
unit whose reception is detected in step S23 (or obtained from another speaker unit) The signal
is decoded according to the decoding procedure according to the compression procedure, and
converted to a reproduction signal according to the desired sound field set in the audio unit 1 by
referring to the sound reproduction characteristic updated in step S22 Do.
[0082]
Step S31, Step S32: The reproduction signal created in Step S29 or Step S30 based on the
reception time of the music signal received this time or the synchronization signal common to
each speaker unit sent by the predetermined speaker unit set in advance. The timing of output
from the speaker 23 of the own speaker unit is adjusted (step S31), and the reproduction signal
is output as sound from the speaker 23 according to the adjusted output timing (step S32), and
the process returns.
[0083]
FIG. 5 is a flowchart of music reproduction processing in the portable audio terminal 3 in the
first embodiment, and shows a control procedure executed by the microcomputer 31 in
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accordance with a control program stored in advance in a memory.
[0084]
In step S41, it is determined whether any operation of the operation switch 32 has been
performed. If YES in this determination, the process proceeds to step S50, and if NO (no
operation), the process proceeds to step S42.
[0085]
Step S42: It is determined whether a music signal has been received from the audio unit 1. If the
determination is NO (no reception of the signal), the process proceeds to step S47; if YES
(reception of the signal), the external (audio unit Determine the set state of the internal flag F2
indicating whether or not to receive the music signal from 1), and if it is determined that F2 = 0
(the reception prohibited state of the signal concerned) in this judgment, the process proceeds to
step S47, F2 = 1 (of the signal concerned When the reception is permitted, the process proceeds
to step S44.
[0086]
Steps S44 to S46: Since the setting state of the internal flag is F2 = 1, the received music signal is
converted into a reproduction signal according to the reproduction characteristic set in advance
by the user of the portable audio terminal 3 (step S44) The reproduction signal is output as a
voice to the speaker (headphones) 37 (step S45), and an internal flag F1 indicating whether or
not the music signal including the music information read out from the sound storage medium
36 by the terminal is independently transmitted. The setting state is set to F1 = 0 (prohibition
state of transmission of the signal) (step S46), and the process proceeds to step S47.
[0087]
Steps S47 to S49: Determine the set state of the internal flag F0 indicating whether the wireless
signal is transmitted from the portable audio terminal 3 (step S47), and in this determination F0
= 1 (transmission state of the wireless signal) At the time, it is judged whether the cancellation
signal for stopping the transmission of the radio signal from the terminal is received from the
audio unit 1 (step S48), and when F0 = 0 (the transmission cancellation state of the radio signal),
the process returns.
When NO at step S48 (when the cancel signal is not received), the process proceeds to step S54
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to continue the transmission of the wireless signal, and when YES (when the cancel signal is
received), the internal The flag F0 is set to 0 (step S49), and the process returns.
[0088]
Step S50: Among the operation switches 32, when the type of the operation switch which
detected that it was operated by the judgment of step S41 is judged and the operated switch is a
switch relating to sound reproduction ("reproduction" switch) step S51 If it is a switch for
stopping playback ("stop" or "pause" switch), the process proceeds to step S58, if it is a switch for
mode setting, the process proceeds to step S59, and if it is a switch for acoustic property setting,
the process proceeds to step S65 .
[0089]
Step S51, Step S52: Since reproduction is instructed by the operation switch of the portable audio
terminal 3, the setting state of the internal flag F1 is judged, and in this judgment F1 = 0
(prohibition state of transmission of music signal from the terminal In step S53, and when F1 = 1
(the transmission permission state of the music signal from the terminal), the stop signal is
transmitted to the unit to prohibit the radio unit 1 from transmitting the radio signal. (Step S52),
the process proceeds to step S53.
[0090]
Step S53: Set the internal flag F0 = 1 (transmission state of wireless signal), and proceed to step
S8.
[0091]
Step S54: The music selected by the user is read from the sound storage medium 36 before the
switch for sound reproduction ("reproduction" switch) is operated, and a music signal including
information of the music is created.
[0092]
Step S55 to Step S58: Determine the set state of the internal flag F1 (Step S55), and if F1 = 0
(prohibition of transmission of music signal from the terminal) in this judgment, the music signal
created in Step S54 is When it is output as a voice to the speaker (headphones) 37 of the
terminal (step S56), and F1 = 1 (the transmission permission state of the music signal from the
terminal), the music signal created in step S54 is a predetermined unit The radio communication
09-05-2019
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device 35 sends out the signals from the radio communication device 35 according to a
predetermined communication procedure (step S57), and returns.
Then, when the operation of the switch ("stop" switch) for stopping reproduction is detected in
step S50, the internal flag F0 = 0 is set (the transmission of the wireless signal is stopped) (step
S58), and the process returns.
That is, when the internal flag F0 = 0 (the transmission stop state of the wireless signal) and the
internal flag F1 = 1, the transmission of the music signal is started in response to the operation of
the “play” switch. Until the operation is detected, the transmission of the music signal
including the information of the music by the predetermined unit amount is performed until all
the selected music is transmitted, and when the “pause” switch is operated, the internal flag It
is preferable to temporarily interrupt the transmission of the music signal while keeping F0 = 1
(the transmission state of the wireless signal).
When the internal flag F1 = 0, the music reproduced by the portable audio terminal 3 alone is
output from the speaker (headphones) 37.
[0093]
Steps S59 to 61: Since the switch operation related to the mode setting is detected in step S50, it
is determined whether the transmission switch is set to ON by the operation (step S59), and
according to the determination, from the terminal The state of the internal flag F1 indicating
whether or not to transmit the music signal is set (F1 = 1: step S60 when the switch is on, F1 = 0:
step S61 when the switch is off).
[0094]
Steps S62 to 64: Since the operation of the switch related to the mode setting is detected in step
S50, it is judged whether the reception switch is set to ON by the operation (step S62), and
according to the judgment, from the audio unit 1 The state of the internal flag F2 indicating
whether or not to receive the music signal is set (F2 = 1: step S63 when the switch is on, F2 = 0:
step S64 when the switch is off).
[0095]
Step S65, Step S66: When the switch operation relating to acoustic characteristic setting is
detected in step S50, the setting states of the internal flags F0 and F1 are determined, and when
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F0 = F1 = 1, the process proceeds to step S68, F0 = When 0, or when F0 = 1 and F1 = 0, the
process returns.
[0096]
Steps S67 to S69: Sound quality, volume, reproduction balance of the speaker units 2A to 2D of
the memory (not shown) in the microcomputer 31 in order to realize a desired sound field
corresponding to the operation of the switch related to the operated acoustic characteristic
setting. Update the setting information on the reproduction characteristics such as sound quality,
volume and reproduction balance of the speaker units 2A to 2D of the memory (not shown) in
the microcomputer 31 in order to realize a desired sound field according to the setting
information on reproduction characteristics such as The sound reproduction characteristic signal
corresponding to the updated setting information is individually sent to the speaker units (step
S69), and the process returns.
[0097]
According to the present embodiment described above, the cable connecting the audio unit 1 and
the speaker units 2A to 2D can be eliminated, and the installation of each component in the
vehicle compartment can be facilitated.
This eliminates the need for the vehicle designer to consider the cable installation site and the
workability for cable installation, thereby improving the degree of freedom in design.
[0098]
Second Embodiment Next, a second embodiment based on the vehicle acoustic device according
to the above-described first embodiment will be described.
In the following description, redundant description of the same configuration as that of the first
embodiment will be omitted, and characteristic parts in the present embodiment will be mainly
described.
[0099]
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In the present embodiment, in each speaker unit shown in FIG. 1, for example, speaker units 2A
and 2B corresponding to the driver's seat and the front passenger seat, and speaker units 2C and
2D corresponding to the left and right rear seats are grouped, Play different songs in the group
unit.
The grouping setting can be configured such that the occupant can arbitrarily set a group
including at least one speaker unit from a predetermined display screen (not shown) using the
operation switch 12 of the audio unit 1 and the display 13. good.
In addition, with the music source and the music selection operation desired to be reproduced,
the display screen illustrated in FIG. 9 is displayed for each group, and in this embodiment, it is
possible for each group set by the occupant. Do.
[0100]
FIG. 6 is a flowchart of music reproduction processing in the audio unit 1 according to the
second embodiment, and the basic processing configuration is substantially the same as the
flowchart of FIG. 3 described in the first embodiment. Characteristic processing in the
embodiment will be described.
[0101]
In the present embodiment, the audio unit 1 needs to transmit different music signals in group
units set in advance.
Therefore, when the switch operation relating to sound reproduction is detected in step S106, in
the present embodiment, the internal flag F is set to 1 in step S107 before sending the
termination signal to the portable audio terminal 3 in step S108. Prior to setting, music selected
for each preset group is set.
Then, in steps S110 and S111, music information for each group is read out from the sound
storage medium 15 or the like to create respective music signals, and these music signals are
given to each speaker unit constituting each group by a predetermined unit amount Send
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together by one.
At this time, the audio unit 1 includes identification information of a group to which each speaker
unit belongs in the music signal to be sent.
[0102]
Further, when the sound reproduction characteristic can be set for each group, it is preferable to
send out the sound reproduction characteristic signal according to the setting in steps S115 and
S116.
[0103]
FIG. 7 is a flowchart of music reproduction processing in the speaker units 2A to 2D in the
second embodiment, and the basic processing configuration is substantially the same as the
flowchart of FIG. 4 described in the first embodiment. The characteristic process in this
embodiment will be described.
[0104]
The speaker units 2A to 2D, when receiving a plurality of types of music signals in step S124,
select the music signals according to the preset reproduction priority in step S125 in the same
manner as in the first embodiment. And select the music signal including the identification
information of the group to which the own unit belongs.
[0105]
Then, when the music signal can not be received in step S126, the music signal including
identification information of the group to which the own speaker unit belongs is selected from
the music signals received as a result of requesting the music signal to another speaker unit in
step S127. There is a need.
Alternatively, if it is possible to recognize another speaker unit of the group to which the own
speaker unit belongs by a plurality of music signals received up to that point, direct request to
transfer the music signal to the other speaker units belonging to the same group Just do it.
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[0106]
FIG. 8 is a flowchart of music reproduction processing in the portable audio terminal 3 in the
second embodiment, and the basic processing configuration is substantially the same as the
flowchart of FIG. 5 described in the first embodiment. The characteristic process in this
embodiment will be described.
[0107]
As in the case of the audio unit 1 described above, in the present embodiment, the portable audio
terminal 3 needs to send out different music signals in group units set in advance.
Therefore, in the case where the switch operation related to sound reproduction is detected in
step S151 and the internal flag F1 = 1 (the transmission permission state of the music signal
from the terminal) in the determination of step S152, in this embodiment, the process proceeds
to step S154. Before transmitting the discontinuation signal to the audio unit 1, in step S153, the
music selected for each group set in advance is set.
Then, in step S156 and step S159, music information for each group is read out from the sound
storage medium 36 etc. to create respective music signals, and those music signals are given a
predetermined unit amount to each speaker unit constituting each group. Send together by one.
At this time, the portable audio terminal 3 includes identification information of a group to which
each speaker unit belongs in the music signal to be sent.
[0108]
Further, when setting the sound reproduction characteristic for each group, it is preferable to
send out the sound reproduction characteristic signal according to the setting in steps S170 and
S171 as in the case of the audio unit 1 described above. .
[0109]
According to the present embodiment, each occupant can listen to the content according to his /
her preference in the set group unit, and it is particularly suitable for being adopted for a vehicle
such as a wagon or bus having a wide cabin.
09-05-2019
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[0110]
In each embodiment mentioned above, although audio unit 1 was explained as a installation type
as shown in Drawing 1, it is not restricted to the system composition which concerned, and
realizes audio unit 1 as a terminal which a passenger can carry. If so, when the passenger brings
the terminal into the vehicle compartment, the music signal to be reproduced can be transferred
to the plurality of speaker units by wireless communication as described above, which is
necessary in the above-mentioned installation type audio unit 1 In addition, it is possible to
eliminate the bother of securing (transferring) music information to the audio unit 1 before
music reproduction, and the convenience is further improved.
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