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JP2003274496

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Notice
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DESCRIPTION JP2003274496
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
sound field setting device for setting a sound field in a vehicle compartment.
[0002]
2. Description of the Related Art A conventional sound field setting apparatus is provided with an
operation unit for setting a sound field. When setting a sound field, the user operates the
operation unit to manually operate the sound field. Some are designed to do this.
[0003]
However, in the above-mentioned conventional sound field setting apparatus, complicated
manual sound field setting work is required for sound field setting, and specialized knowledge is
required for sound field setting. There is a problem that it is necessary.
[0004]
By the way, in a car, especially a car for personal use, in addition to travelability and safety,
comfort is strongly desired.
In addition, the equipment for electrical components has also been enhanced.
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Among them, acoustic-related devices strongly reflect the preference of the user, and the
configuration relating to the combination etc. is extremely complicated. If the degree of freedom
for the connection of audio related devices is further increased in the future, there is a possibility
that the combination of the amplifier, the CD player, the navigation device, the speaker, etc. can
be freely selected by the user as in home audio. Such a situation may make the above-mentioned
problems more noticeable.
[0005]
Therefore, in view of the above problems, the present invention aims to provide a sound field
setting device capable of automatically setting a sound field according to the acoustic
characteristic in the vehicle compartment, the speaker arrangement position in the vehicle
compartment, and the characteristic of the speaker. I assume.
[0006]
[Means for Solving the Problems] Technical means for achieving the above object are vehicle
acoustic information relating to acoustic characteristics in a vehicle interior, speaker position
information relating to an arrangement position of a speaker disposed in the vehicle interior, and
the speaker The signal given to the speaker from input reception means for receiving an input of
information necessary for setting a sound field such as speaker characteristic information
relating to the characteristics of the speaker, and signal generation means for generating a signal
for driving the speaker; And adjusting means for setting a sound field in the vehicle compartment
by adjusting the information necessary for the sound field setting received by the receiving
means.
[0007]
Preferably, the adjustment means adjusts the signal individually for each of the speakers.
[0008]
In addition, preferably, the input receiving unit reads information required for setting the sound
field from a recording medium which is detachably loaded.
[0009]
Furthermore, preferably, the input receiving unit acquires information necessary for setting the
sound field from a predetermined information supply source via a wireless or wired
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communication line.
[0010]
DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of an on-vehicle
amplifier unit to which a sound field setting apparatus according to an embodiment of the
present invention is applied.
In the present embodiment, as shown in FIG. 1, the main part of the sound field setting device
according to the present embodiment is incorporated in the amplifier unit 1, but all or a part of
the main part is other than the amplifier unit 1 May be incorporated in an on-vehicle device, or
may constitute an independent unit in its main part.
[0011]
The amplifier unit 1 has a function as an amplifier that amplifies an audio signal input from an
audio device (signal generation means) 3 that is a music source and supplies the amplified audio
signal to the speaker 5 to drive the speaker 5. It is equipped with a function as a sound field
setting device which performs sound field setting by adjusting when supplying to 5.
[0012]
As shown in FIG. 1, a removable memory card (recording medium) 13 can be detachably loaded
to the unit body 11 of the amplifier unit 1, and an information acquisition unit 15 can be
connected. .
The unit main body 11 includes a digital / analog (hereinafter referred to as "D / A") converter
21, first and second amplifiers 23 and 25, a plurality of adjustment circuits 27, and a card
interface (hereinafter referred to as "I (Read unit) 29, a built-in memory 31, a microcomputer 33,
and a network I / F 35.
The D / A converter 21, the card I / F 29, the built-in memory 31 and the microcomputer 33 are
connected to one another via an internal bus 37.
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[0013]
Among these components, the information acquisition unit 15, the card I / F 29, the built-in
memory 31, the microcomputer 33, and the network I / F 35 constitute a sound field setting
device according to this embodiment, and the card I / F 29 acquires information The unit 15 and
the network I / F 35 correspond to the input acceptance means according to the present
invention, and the microcomputer 33 and the adjustment circuit 27 correspond to the
adjustment means according to the present invention.
[0014]
As the audio device 3, various in-vehicle audio devices such as a DVD player, a CD player, an MD
player, a cassette deck, and a tuner for receiving broadcast radio waves such as music are used.
In the present embodiment, the audio device 3 outputs an audio signal such as music in digital
form.
A plurality of (four in the present embodiment) speakers 5 are provided at predetermined
positions in the vehicle compartment.
[0015]
The D / A converter 21 of the unit main body 11 converts the audio signal in digital format given
from the audio device 3 into an audio signal in analog format and sends it to the first amplifier
23 and the digital signal given from the audio device 3 An audio signal of a format is supplied to
the microcomputer 33 through the internal bus 37.
This audio signal is used for setting the sound field described later as needed, and is output to
other in-vehicle devices via the network I / F 35 as needed.
[0016]
Further, in the present embodiment, an audio signal captured from the memory card 13 or the
information acquisition unit 15 can be output to the speaker 5, and is captured from the memory
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card 13 or the information acquisition unit 15 under the control of the microcomputer 33. The
audio signal (audio information) is supplied to the D / A converter 21 via the internal bus 37
under the control of the microcomputer 33, and is converted into an audio signal of an analog
format by the D / A converter 21 and the first amplifier Given to 23
[0017]
The first and second amplifiers 23 and 25 are connected in series, and the input audio signal is
first amplified by the first amplifier 23 and then further amplified by the second amplifier 25 and
supplied to each speaker 5 It is supposed to be
[0018]
The adjustment circuit 27 is provided for each speaker 5 and is interposed in each signal line
connecting the second amplifier 25 and each speaker 5.
Then, each adjustment circuit 27 adjusts the audio signal supplied from the second amplifier 25
to the speaker 5 individually for each speaker 5 under the control of the microcomputer 33.
Although various contents necessary for sound field control can be considered as the adjustment
contents of the adjustment circuit 27, for example, the output level of the sound of each sound
range (high sound, bass etc.) is adjusted individually for each speaker 5, etc. Contents can be
considered.
[0019]
The memory card 13 is a semiconductor recording type recording medium such as a flash ROM
in which the stored contents can be rewritten, and the vehicle acoustic information on the
acoustic characteristics in the vehicle compartment, the speaker position on the arrangement
position of each speaker 5 disposed in the vehicle compartment Information necessary for
setting the sound field such as information and speaker characteristic information related to the
characteristics of each speaker 5 is recorded.
The memory card 13 can also record audio information such as music.
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[0020]
The card I / F 29 has a card slot (not shown) into which the memory card 13 is detachably
loaded, and reads the various information recorded in the memory card 13 under the control of
the microcomputer 33.
[0021]
The built-in memory 31 stores information for setting a sound field such as the above-mentioned
vehicle acoustic information or the like taken in from the memory card 13 or the information
acquisition unit 15 described later under the control of the microcomputer 33.
[0022]
The network I / F 35 is for connecting information related devices such as the information
acquisition unit 15 to a network (for example, connection by LAN).
[0023]
The information acquisition unit 15 is for acquiring information for setting a sound field.
Specifically, in the present embodiment, as shown in FIG. 2, the navigation device (reading
means) 41 and the portable telephone 43 are connected. It is used as an information acquisition
unit 15.
[0024]
The navigation device 41 reads information for setting a sound field such as vehicle acoustic
information recorded on a removable memory card 45 such as a flash ROM (or may be another
recording medium such as a DVD or CD). The signal is sent to the amplifier unit 1 via the
network.
The navigation device 41 also reads audio information such as music from the memory card 45
(or other recording medium) and sends it to the amplifier unit 1.
[0025]
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The cellular phone 43 is detachably connected to the connection unit 47 and connected to the
amplifier unit 1 via the connection unit 47.
The mobile phone 43 is controlled by the microcomputer 33 of the amplifier unit 1 through the
network to set the sound field such as vehicle acoustic information from the service center 51
such as a service provider via the wireless communication line using the mobile phone line.
Information or audio information such as music, and the information is sent to the amplifier unit
1 via the connection unit 47.
[0026]
As a modification, instead of the mobile phone 43, a wireless communication device capable of
transmitting and receiving information by a wireless communication line (a wireless LAN, a
communication line by Bluetooth (R), etc.) or a wired communication line (cable LAN etc.) is
provided. The information may be taken in by the wireless communication device.
[0027]
The microcomputer 33 controls each adjustment circuit 27 based on information necessary for
sound field setting such as vehicle acoustic information, speaker position information and
speaker characteristic information taken in by the memory card 13, the memory card 45 of the
navigation device 41 or the mobile phone 43. Are individually controlled to set an optimal sound
field according to the acoustic characteristic in the vehicle compartment, the arrangement
position of each speaker 5, the characteristic of each speaker 5, and the like.
For example, the output level is adjusted for each of the speakers 5 according to the arrangement
position of the speakers 5, or the level of each sound range is adjusted for each of the speakers 5
according to the characteristics of the speakers 5, Adjustment such as performing level
adjustment for each sound range is performed for each speaker 5 according to the acoustic
characteristic due to the difference between
[0028]
More specifically, for example, in the case of a one-box car, the interior of the vehicle is wide and
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there are many obstacles such as three-row seats, and the speaker 5 is generally installed at the
door or side, Since the position is generally low relative to the position of the passenger's ear, a
high-pitched sound with a relatively high directivity is likely to be absorbed by an obstacle such
as a seat.
Therefore, in the one-box car, it is preferable to set the level of the middle to high range of each
speaker 5 to be high.
[0029]
Further, in the case of a sports car, while the interior of the vehicle is relatively narrow, the rear
speakers are used for the rear speakers 5, etc., whereby the degree of freedom in selecting the
arrangement position is relatively large.
Therefore, in this case, the level of the middle to high range is set high for the front side speaker
5, and the level of the low range is set high for the rear side speaker 5, and the trunk volume is
used for resonance, etc. It is good to emphasize the bass.
[0030]
With such a configuration, the user loads the memory card 13 in which the information
necessary for setting the sound field such as vehicle acoustic information is recorded into the
amplifier unit 1 when the speaker 5 is installed, etc., and records the memory card 13. When the
information is read by the amplifier unit 1, the sound field setting is automatically performed by
the microcomputer 33 based on the read information. As the information input path, as
described above, in addition to the memory card 13, there is a path by the memory card 45
loaded in the navigation device 41 and a path by the portable telephone 43, and these can be
selected appropriately. .
[0031]
The information necessary for setting the sound field to the memory card 13, 45 can be used by
the personal computer or the like via the Internet etc. for the information for the sound setting
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according to the acoustic characteristics etc. of the user's own vehicle. , And may be written to
the memory card 13, 45. Alternatively, a dealer or a dealer such as a car dealer sells the
information for setting the sound field according to the acoustic characteristics of the user's
vehicle etc. in the memory card 13, 45 for a fee or for free and supplies it to the user. May be
Similarly, for the acquisition of information by the mobile phone 43, a paid or paid form can be
considered.
[0032]
As described above, according to the present embodiment, if information necessary for setting
the sound field, such as vehicle acoustic information, is input to the amplifier unit 1 without
performing troublesome manual setting of the sound field, based on the input information Thus,
the amplifier unit 1 can automatically set a sound field according to the acoustic characteristics
in the vehicle compartment, the speaker arrangement position in the vehicle compartment, and
the characteristics of the speakers.
[0033]
Further, since the audio signal can be adjusted individually for each of the speakers 5, fine sound
field setting can be performed.
[0034]
Furthermore, since information necessary for setting the sound field such as vehicle acoustic
information is taken into the amplifier unit 1 via the removable memory card 13, 45, the source
of the information necessary for setting the sound field can be used. It is possible to easily supply
information and capture the information into the amplifier unit 1 by the user.
[0035]
Further, since information necessary for setting the sound field such as vehicle acoustic
information is taken into the amplifier unit 1 through the communication line using the mobile
phone 43, the source of the information necessary for setting the sound field can be used. It is
possible to easily supply information and capture the information into the amplifier unit 1 by the
user.
[0036]
According to the first aspect of the present invention, it is possible to input information
necessary for setting the sound field, such as vehicle acoustic information, to the sound field
setting device without performing a troublesome manual setting of the sound field. Based on the
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input information, it is possible to automatically set the sound field setting device according to
the acoustic characteristic in the vehicle compartment, the speaker arrangement position in the
vehicle compartment, the characteristic of the speaker, and the like.
[0037]
According to the second aspect of the invention, since the drive signal can be adjusted
individually for each speaker, it is possible to perform detailed sound field setting.
[0038]
According to the third aspect of the present invention, the information necessary for the sound
field setting is taken into the sound field setting device via the removable recording medium, so
that the source of the information necessary for the sound field setting can be used. It is possible
to easily supply information and capture the information into the sound field setting device by
the user.
[0039]
According to the invention as set forth in claim 4, the information necessary for the sound field
setting is taken into the sound field setting device through the communication line, so that the
supply of the information by the supply source of the information necessary for the sound field
setting And the user can easily load the information into the sound field setting device.
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