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JP2001037000

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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 JP2001037000
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates
generally to a car audio system and the like, and relates to an on-vehicle audio reproduction
system mounted on a car for mainly reproducing music, and in particular, a plurality of speakers
in a car. The present invention relates to an on-vehicle audio reproduction system that distributes
and arranges and outputs an acoustic signal having an acoustic effect such as a surround sound
field by a multi-channel system.
[0002]
2. Description of the Related Art In an on-vehicle audio reproduction system called a car audio
system etc., not only stereos of left and right two channels but also three or more speakers are
distributed and arranged in front of and in the rear of a car. There is a system for forming a
sound field that exhibits a three-dimensional sound effect such as so-called surround with
multiple channels. In such a system that outputs three or more multi-channel acoustic signals,
the sound field is formed so that the sound image is distributed not only in the lateral direction
but also in the longitudinal direction.
[0003]
By the way, in a car, the people and seats to be taken are not specified except for the driver, and
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1
there is no consistency or law in the riding situation of the people, and it is different from time to
time. It is performed to adjust the volume balance of each channel reproduced by each speaker
according to the riding condition of the personnel who fluctuate in this way.
[0004]
In the case of this volume balance adjustment, usually, a rotary operation type or linear operation
type knob or push-down button for left and right balance adjustment, and a rotary operation type
or straight operation for front and rear balance adjustment. It is performed by a combination
operation of the expression knob or the push button. In addition, adjustment of the volume
balance before and behind may be called a "fader." An example of such a conventional on-vehicle
audio reproduction system will be described with reference to FIG.
[0005]
In FIG. 3, although not shown, the operation unit 11 is provided with balance operation units for
adjusting the left and right volume balances and fader operation units for adjusting the front and
rear volume balances. The control unit 12 takes in the value operated and input by the operation
unit 11, and adjusts the output volume by the electronic volume 13. The electronic volume 13
defines the volume of the audio signal output from the speaker group 14 and outputs an audio
signal from an audio signal source (for example, a radio tuner). The speaker group 14 includes
speakers 141 and 142 disposed at the front left (FL; Front Left), the front right (FR; Front Right),
the rear left (RL; Rear Left), and the rear right (RR: Rear Right) in the car. , 143 and 144 form a
surround sound field of four channels, in this case at a volume adjusted via the electronic volume
13 respectively. When the operator operates the balance operation unit and the fader operation
unit of the operation unit 11, the respective operation amounts are displayed on the display unit
15. The display unit 15 numerically or graphically displays the operation amount so that the
operator can easily grasp the operation amount.
[0006]
As described above, the adjustment operation in the operation unit 11 is operated separately for
balance adjustment which is adjustment of left and right volume balance and fader adjustment
which is adjustment of front and rear volume balance.
[0007]
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2
In addition, if the left and right and the front and back are adjusted separately, even if the display
unit 15 displays them, it is difficult for the operator to grasp the operation feeling.
Therefore, a panpot (meaning of a panning potentiometer) device may be used in which the left
and right balance adjustment mechanisms and the front and rear fader adjustment mechanisms
are orthogonally arranged and interlocked, and balance adjustment is performed by a lever
operation such as a so-called joystick. Such a pan pot apparatus can perform balance adjustment
in the left and right direction by inclining the operation lever left and right, and can perform
fader adjustment in the front and rear direction by inclining the operation lever in the front and
back direction. Therefore, if the control lever is inclined in the oblique direction, it is possible to
perform combined operation of the left and right balance and the front and rear faders
collectively.
[0008]
Further, the volume ratio of the adjustment of the volume balance between the left and right and
the front and back is set in advance for each distribution arrangement of passengers, and these
are selected and set by a selection operation using a push button operation or the like. There was
also a case.
[0009]
However, in any of the above-mentioned cases, the operator must perform the adjustment of the
volume balance by the balance adjustment of the left and right and the fader adjustment before
and after. Was complicated.
Also, usually, the operation unit for adjusting the volume balance should be provided in the
vicinity of the driver's seat since it should be possible to easily operate even when the driver is
riding alone. . For this reason, although the driver mainly performs the operation of the operation
unit, it is extremely dangerous that the driver performs such a complicated operation while
driving. Furthermore, when the number of passengers and the placement change due to getting
on and off during traveling, etc., it was necessary to adjust the volume balance each time.
[0010]
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The present invention has been made in view of the above situation, and has a simple
configuration to automatically adjust the distribution of sound fields such as multi-channel
surround according to the distribution arrangement of passengers, and ensure properness. It is
an object of the present invention to provide an on-vehicle audio reproduction system capable of
forming a balanced sound field.
[0011]
SUMMARY OF THE INVENTION In order to achieve the above object, an on-vehicle audio
reproduction system according to a first aspect of the present invention comprises a plurality of
speakers mounted on a car and outputting audio signals. And each boarding position recognition
means for judging the presence or absence of the boarding personnel for each seat of the car and
recognizing the boarding position distribution of the staff, and the boarding position distribution
status obtained by the boarding position recognition means And sound volume adjusting means
for adjusting the volume of the sound signal output from each of the plurality of speakers so as
to form a sound field suitable for personnel.
[0012]
According to the present invention, the boarding position recognition means determines the
presence or absence of the boarding personnel for each seat to recognize the boarding position
distribution of the personnel, and the volume adjusting means determines a plurality of the
boarding position distribution conditions. Control the volume of the playback sound from the
speaker.
By this, although the configuration is simple, the distribution of sound fields such as multichannel surround is adjusted according to the distribution arrangement of passengers, the
volume balance is automatically adjusted, and the distribution arrangement of passengers In
response to the fluctuation, it is possible to form a well-balanced sound field that is always
properly and properly adjusted.
[0013]
More specifically, the boarding position recognizing means is provided under each seat of the
car, and in response to a person sitting down, a plurality of switches for judging the presence or
absence of the boarding personnel in the seat are used. You may have.
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[0014]
Further, the boarding position recognition means is provided respectively in the vicinity of each
seat of the car, and detects that a person has sat down on each seat to determine the presence or
absence of the boarding personnel in that seat, for example, optical type A plurality of capacitive
or electromagnetic sensors may be provided.
[0015]
Preferably, the volume control means includes a processor and an electronic volume for
electronically adjusting the signal level of the signal supplied to each of the plurality of speakers.
As a result, the volume adjusting means can automatically adjust the volume of the reproduced
sound output from each of the plurality of speakers, and a sound field which has been properly
and properly balanced can be formed.
[0016]
In the audio reproducing method according to the second aspect of the present invention, the
presence or absence of a passenger is determined for each seat of a car to recognize the
distribution of the riding position of the personnel, and based on the distribution of the riding
position, The volume of the reproduced sound output from each of the plurality of speakers is
adjusted to form a sound field suitable for the situation.
[0017]
According to the present invention, each of the plurality of speakers is configured to determine
the presence or absence of the boarding personnel for each seat of the car and to recognize the
boarding position distribution of the staff to form a sound field suitable for the boarding
situation. Adjust the volume of the playback sound to be output.
As a result, the volume balance in multi-channel surround or the like can be automatically
adjusted, and a sound field that has been balanced properly and properly can be formed.
[0018]
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More specifically, it is desirable to determine the presence or absence of a passenger for each
seat by turning on / off a switch provided under each seat.
In addition, the presence or absence of the passenger may be determined for each seat by, for
example, an optical, capacitance or electromagnetic sensor provided in the vicinity of each seat.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION An on-vehicle audio reproduction system
according to an embodiment of the present invention will be described below with reference to
the drawings.
[0020]
FIG. 1 is a diagram showing the configuration of an on-vehicle audio reproduction system
according to the embodiment of the present invention.
As shown, the in-vehicle audio reproduction system includes a boarding position recognition unit
1, a control unit 2, an electronic volume 3, and a speaker group 4.
[0021]
The boarding position recognition unit 1 detects the presence or absence of the boarding
personnel for each seat to recognize the boarding situation of the staff.
More specifically, as shown in FIG. 2, for example, the riding position recognition unit 1 is
embedded under the front left, front right, rear left and rear right seats where passengers are
seated. The left switch 1a, the front right switch 1b, the rear left switch 1c, and the rear right
switch 1d. Each of the switches 1a to 1d is, for example, turned on in a state in which a person is
seated at a predetermined position, and is turned off in a state not seated.
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[0022]
The control unit 2 is composed of a CPU (Central Processing Unit) or the like, and in order to
optimally form a multi-channel surround sound field according to the layout distribution of the
boarding personnel recognized by the boarding position recognition unit 1. Control the volume
balance of the audio signal of each channel.
[0023]
The electronic volume 3 adjusts the reproduction volume of each of the speakers 41 to 44
provided in the speaker group 4 for outputting the sound signal of each channel in accordance
with the control of the control unit 2.
[0024]
The speaker group 4 is a plurality of speakers for outputting sound signals of each channel
forming a multi-channel surround sound field, and, for example, as shown in FIG. 2, an FL (Front
Left) disposed on the front left A speaker 41, an FR (Front Right) speaker 42 disposed on the
front right, an RL (Rear Left) speaker 43 disposed on the rear left, and an RR (Rear Right) speaker
44 disposed on the rear right There is.
[0025]
In FIG. 2, the two speakers 41 and 42 installed in the front of the vehicle are disposed at the
doors etc. forming the side walls on the front left and right of the cabin, and installed at the rear
of the vehicle The two speakers 43 and 44 are disposed on the left and right of the rear tray.
[0026]
Also, the two speakers 41 and 42 installed in the front of the vehicle may be provided on the
front console panel instead of the front side wall of the cabin, and the two speakers 41 and 42
provided in the rear of the vehicle may be provided. The speakers 43 and 44 may be provided
not on the rear tray but on the rear side wall of the cabin.
Furthermore, the arrangement is optional, such as arranging a speaker further at least one of the
front center and the rear center.
[0027]
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Next, the operation of the on-vehicle audio reproduction system having the above configuration
will be described.
This on-vehicle audio reproduction system is a system capable of recognizing the boarding
situation of personnel in a car and automatically adjusting the sound field of multi-channel
surround according to the boarding position distribution situation.
[0028]
For example, as shown in FIG. 2, the switches 1a to 1d constituting the boarding position
recognition unit 1 are respectively disposed under the front left, front right, rear left and rear
right seats where a passenger is seated. Be buried.
Each of the switches 1a to 1d is turned on in a state where a passenger is seated at the
corresponding position, and is turned off in a state not seated.
[0029]
For example, as shown in FIG. 2, when the front right seat and the rear left and right seats have
passengers (indicated by dotted lines), the front right switch 1b, the rear left switch 1c and the
rear right switch 1d is turned on.
[0030]
Since the front left switch 1a is off and the other switches 1b to 1d are on, the control unit 2 is
arranged to form a multi-channel surround sound field according to the boarding position
distribution situation. Control the volume balance of the channel's audio signal.
Specifically, the control unit 2 controls the volume balance by controlling the electronic volume 3
for adjusting the playback volume of each of the speakers 41 to 44 of FL, FR, RL, and RR.
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Here, the control unit 2 records in advance information for defining the sound volume balance in
accordance with the boarding position distribution condition in a memory (not shown), and when
the boarding position recognition unit 1 recognizes the boarding situation, the information To
determine the volume balance.
[0031]
The electronic volume 3 adjusts the reproduction volume of each of the speakers 41 to 44 of the
FL, FR, RL and RR of the speaker group 4 under the control of the control unit 2 and outputs an
acoustic signal of each channel. As a result, the sound field can be automatically adjusted in
accordance with the boarding position distribution status of the personnel who are in the car,
and the sound field can be easily, surely and properly balanced. .
[0032]
As described above, the boarding position recognition unit 1 recognizes the distribution
arrangement of the boarding personnel by the switches 1a to 1d and the like on the front left,
front right, rear left and rear right. The control unit 2 controls the electronic volume 3 according
to the arrangement status of the boarding personnel recognized by the boarding position
recognition unit 1 and reproduces the speakers 41 to 44 of each channel of the speaker group 4
for FL, FR, RL and RR. Adjust the volume.
[0033]
Therefore, since the right and left front / rear balance adjustment settings are made
automatically and accurately according to the distribution of passengers, complicated operation
for balance and fader adjustment becomes unnecessary. Also, even if the number of passengers
and the position change, the location recognition unit 1 recognizes it each time, and the control
unit 2 and the electronic volume 3 control the FL, FR, RL and RR channels of the speaker group 4
In order to re-control the reproduction volume by the speakers 41 to 44, the driver or the like
does not need to perform the readjustment operation due to the getting on and off of the number
of passengers.
[0034]
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The present invention is not limited to the above embodiment, and various modifications and
applications are possible. For example, in the above embodiment, as shown in FIG. 2, the
boarding position recognition unit 1 includes switches 1 a to 1 d embedded under each seat on
which the boarding staff sits down to recognize the boarding distribution state of boarding staff
Although it has been described that it is not limited to this. That is, for example, an optical sensor,
an electrostatic capacitance sensor, or an electromagnetic sensor for detecting the presence or
absence of the boarding personnel in the corresponding seat may be provided in the vicinity of
each seat to recognize the boarding distribution state of the boarding personnel. .
[0035]
Also, the switches 1a to 1d can be arranged at any positions where it is possible to detect that a
person is seated in each seat, for example, installed at a backrest of a seat. May be
[0036]
The control unit 2 not only controls the volume distribution of the speaker group 4 via the
electronic volume 3, but also controls the width of the sound image distribution range of the
multi-channel surround reproduction sound field. It is also good.
[0037]
As described above, according to the present invention, according to the present invention, the
adjustment of the volume balance that adjusts the distribution of the reproduction sound field
such as multi-channel surround according to the distribution arrangement of the passengers It is
possible to provide an on-vehicle audio reproduction system capable of automating the operation
and forming a sound field which is always properly and properly balanced in response to a
change in distribution arrangement of passengers.
[0038]
Brief description of the drawings
[0039]
1 is a block diagram schematically showing a configuration of an on-vehicle audio reproduction
system according to the embodiment of the present invention.
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[0040]
2 is a diagram illustrating the arrangement relationship of the boarding position recognition unit
and the speaker group in the vehicle compartment.
[0041]
3 is a block diagram schematically showing a configuration of a conventional in-vehicle audio
reproduction system.
[0042]
Explanation of sign
[0043]
DESCRIPTION OF SYMBOLS 1 Ride position recognition part 2, 12 Control part 3, 13 Electronic
volume 4, 14 Speaker group 11 Operation part 15 Display part 1a Front left switch 1b Front
right switch 1c Rear left switch 1d Rear right switch 41, 141 FL (front Left) Speakers 42, 142 FR
(front right) speakers 43, 143 RL (back left) speakers 44, 144 RR (back right) speakers
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