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DESCRIPTION JP2002344268

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DESCRIPTION JP2002344268
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
audio reproduction apparatus for changing and outputting acoustic characteristics such as
volume and frequency characteristics of an audio signal, and in particular to the acoustic
characteristics of an audio reproduction apparatus used in a mobile object such as a vehicle. For
what to change.
[0002]
2. Description of the Related Art Heretofore, there have been sound reproducing devices for
changing the acoustic characteristics such as the volume and frequency characteristics of the
sound signal outputted in response to the user's operation. One that is adjusted according to the
speed and the number of revolutions is known, and it is shown, for example, as shown in FIG. 9
(see, for example, JP-A-6-58618 and JP-A-8-198025 as such a technology).
[0003]
In FIG. 9, when a speed signal is input from the speed detector 1 to the CPU 2, the CPU 2
controls the volume volume 3 to adjust the volume level output from the audio source 4
configured by car audio, so that an audio volume is obtained. The audio reproduction system 5
reproduces the signal output from 3 and outputs the reproduction signal from the speaker 6. The
volume level of the audio source 4 output from the speaker 6 is easily adjusted to It is possible to
prevent the influence of the running noise.
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[0004]
However, in such a conventional audio reproduction apparatus, since only the acoustic
characteristics are changed in accordance with the traveling speed of the vehicle, the urban area
and the suburbs, or high speed There is a problem that the acoustic characteristics can not be
controlled according to the current position of the vehicle, such as roads and general roads.
[0005]
The present invention is intended to solve the above-mentioned conventional problems, and an
object of the present invention is to provide an excellent audio reproduction apparatus capable of
controlling the acoustic characteristics of audio in accordance with the position of a moving
object.
[0006]
A voice reproducing apparatus according to the present invention comprises a current position
detecting means for detecting a current position of a moving object, a voice output means for
outputting a voice signal, and a voice output from the voice output means. The acoustic
characteristic control means for controlling the acoustic characteristic of the signal, and the
acoustic characteristic storage means for storing the positional information and the acoustic
characteristic information in association with each other, the acoustic characteristic control
means is the current detected by the current position detection means The audio signal is
controlled by the acoustic characteristic information obtained from the acoustic characteristic
storage means according to the position.
[0007]
With such a configuration, it is possible to output from the voice output means the voice adjusted
in accordance with the acoustic characteristic according to the current position of the moving
body.
[0008]
Further, in the audio reproduction device according to the present invention, the acoustic
characteristic storage means includes a position condition table which associates position
information with position conditions, and an acoustic characteristic table which associates the
position conditions with acoustic characteristic information, and the position conditions A
position condition according to the current position is obtained from a table, and acoustic
characteristic information according to the position condition is obtained from the acoustic
characteristic table.
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[0009]
With such a configuration, when the current position of the moving object is a predetermined
position condition such as a highway or a parking lot, the voice output means is made to output a
voice adjusted according to the acoustic characteristics according to the position condition. be
able to.
[0010]
Further, in the sound reproducing apparatus according to the present invention, the sound is
associated with an input unit for inputting the sound characteristic information, the sound
characteristic information inputted by the input unit, and a current position detected by the
current position detection unit. And storage control means for storing data in the property
storage means.
[0011]
With such a configuration, at a position at which the acoustic characteristic information is input
and adjusted or at the same position condition as the adjusted position, the voice adjusted in
accordance with the acoustic characteristic input and adjusted in advance is voiced It can be
output from the output means.
[0012]
Further, the audio reproduction device of the present invention is configured to be mounted on a
vehicle.
[0013]
According to such a configuration, it is possible to adjust and output the acoustic characteristic
output from the on-vehicle audio reproduction device into the vehicle compartment according to
the position of the vehicle.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be
described based on the embodiment thereof.
[0015]
FIGS. 1-8 is a figure which shows one Embodiment of the audio | voice reproduction apparatus
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based on this invention.
[0016]
First, the configuration will be described.
The voice reproduction device 1 is mounted on a vehicle, and the voice reproduction device 1
includes a vehicle position detection unit (current position detection unit) 2, a map data reading
unit 3, a vehicle position display device 4, and an arbitrary position storage unit (Storage control
means) 5, position comparison means 6, volume / frequency characteristic storage means
(acoustic characteristic storage means) 7, volume / frequency characteristic automatic change
means (acoustic characteristic control means) 8, input device (input means) 9 and output The
apparatus (voice output means) 10 is configured.
[0017]
The vehicle position detection device 100 comprising the vehicle position detection means 2,
map data readout means 3, vehicle position display device 4, optional position storage device 5,
position comparison means 6 and volume / frequency characteristic storage means 7 is shown in
FIG. As shown in the figure, the azimuth sensor 11, distance sensor 12, various sensors 13,
sensor signal processing unit 14, GPS (Global Positioning System) receiver 15, CD-ROM drive 16,
communication interface 17, CPU (Central Processing Unit) 18, ROM (Read Only Memory) 19, DRAM (Dynamic Random Access Memory) 20, S-RAM (Static Random Access Memory) 21, image
processor 22, Kanji font ROM 23, V-RAM (Video Random Access Memory) 24, RGB conversion A
circuit 25 and a display / operation unit 26 are provided.
[0018]
The direction sensor 11 is composed of a geomagnetic sensor for detecting the absolute traveling
direction of a car (mobile body) and an optical gyro for detecting the relative traveling direction
of the car, and the distance sensor 12 is a pulse corresponding to the number of rotations of the
wheel. Is supposed to occur.
[0019]
The various sensors 13 are configured to output various sensor signals such as on / off signals of
a brake switch, a parking switch, etc., and a signal of power supply voltage monitoring.
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[0020]
The sensor signal processing unit 14 is configured to process sensor signals of the azimuth
sensor 11, the distance sensor 12, the various sensors 13, and the like.
[0021]
The GPS receiver 15 receives and calculates radio waves transmitted from a plurality of satellites
to obtain the position (latitude, longitude) of the receiving point.
[0022]
The CD-ROM drive 16 reads map data from the CD-ROM 16a in which map data is recorded.
[0023]
The display / operation unit 26 includes a liquid crystal display 26a for displaying a map and the
current traveling position and orientation of a car, and a touch panel 26b provided on the front
of the liquid crystal display 26a. , A switch for instructing a route search, and a switch for
selecting a destination from among the names of places displayed on the liquid crystal display
26a.
[0024]
The CPU 18 controls the entire vehicle position detection apparatus 100, and executes a
sequence as the vehicle position detection apparatus 100 based on a calculation program stored
in the ROM 11.
[0025]
The D-RAM 12 is configured to store data from the direction sensor 11, the distance sensor 12,
various sensors 13, the GPS receiver 15, the CD-ROM drive 16 and the like, the calculation result
in the CPU 18, and the like.
[0026]
The S-RAM 21 is a backup memory for holding necessary data even when the power supply to
the vehicle position detection apparatus 100 is stopped.
[0027]
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The kanji and font RAM 23 stores patterns such as characters and symbols to be displayed on
the liquid crystal display 26a.
[0028]
The image processor 22 forms a display image based on map data, current position data of the
vehicle, and the like.
[0029]
The V-RAM 24 combines the map data output from the CPU 18, the current position data, and
the kanji font such as the town name and road name output from the kanji font ROM 23 and
stores an image to be displayed on the liquid crystal display 26a. It has become.
[0030]
The RGB conversion circuit 25 is a circuit for converting output data of the V-RAM 24 into a
color signal, and the color signal is output from the RGB conversion circuit 25 to the liquid
crystal display 26 a.
[0031]
The communication interface 17 is an interface for exchanging signals between the CD-ROM 16,
the GPS receiver 15, the operation / display unit 26 and the CPU 18.
[0032]
On the other hand, as shown in FIG. 3, the on-vehicle audio reproducing apparatus 200 including
the volume / frequency characteristic automatic changing means 8, the input device 9 and the
output device 10 has an antenna 31, a tuner 32, a storage medium drive 33, an AUX 34, an
interface 35. , A sound volume / sound quality change device (DSP) 36, a CPU 37, an input
interface 38, an input panel 39, an AMP 40, and a speaker 41.
[0033]
Here, the speaker 41 is a four-channel speaker installed at the front, rear, left, and right of the
vehicle, and the DSP 36 and the AMP 40 control audio signals sent to the speaker 41
corresponding to the four channels.
[0034]
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The tuner 32 detects and tunes a radio wave of a broadcast such as radio or television received
from the antenna 31 into a single broadcast and converts it into a minute electric signal.
[0035]
The recording medium drive 33 converts a signal of a storage medium such as a CD (Compact
Disc), an MD (Mini Disc), a DVD (Digital Video Disc), a CST (cassette) or the like into a minute
electric signal of sound.
[0036]
The AUX 34 is an externally connected device and is mainly a storage medium such as a CD
changer, and the AUX 34 is operated through the connection interface 35 to take in a minute
electrical signal of sound.
[0037]
The input panel 39 is a panel on the front of the in-vehicle audio reproduction device 200, and
includes buttons for the user to operate the in-vehicle audio reproduction device 200. The user
operates the input panel 39 to perform audio Adjustment, mode switching, etc. can be
performed.
[0038]
A signal input by the user from the input panel 39 is input to the CPU 37 through the input
interface 38.
[0039]
The volume / sound quality change device 36 is a device for changing the volume / sound
quality, and performs source selection, volume, sound quality, and adjustment of the sound field
according to an instruction of the CPU 37 according to the user's operation.
[0040]
An audio signal output from the volume / sound quality change device 36 is amplified by an
AMP (amplifier) 40 and converted into audio by a speaker 41.
[0041]
On the other hand, in the present embodiment, the position information and the volume and
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frequency characteristics according to the position are written from the input device 9, and the
position information and the volume and frequency characteristics are stored in the acoustic
characteristic table 60 of the S-RAM 21. It is memorized.
[0042]
Specifically, position information is input from the input device 9.
For example, as shown in the position condition table 50 of FIG. 4, this position information is
input by associating the position conditions with the points P1 to Pn (for example, the point P1
on the expressway is input or a point different from P1 Enter P2).
[0043]
Then, based on the position condition table 50, the acoustic characteristic table 60 shown in FIG.
5 is created.
In FIG. 5, for example, position information and acoustic characteristic information (volume,
frequency characteristics, rear seat according to the crossing point A, intersection B, parking lot
C, expressway D, and toll plaza E of the map shown in FIG. And the sound volume balance of the
front seat are stored in the acoustic characteristic table 60 of the S-RAM 21 in association with
each other.
[0044]
Here, the position condition table 50 or the acoustic characteristic table 60 created based on the
position condition table 50 may be stored in the CD-ROM 16 or another storage medium, and
may be stored in these storage media. The configuration may be such that the acquired
information is acquired as needed (when the acoustic characteristic according to the position
information is retrieved or controlled by the acoustic characteristic).
[0045]
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In FIG. 5, the volume is set between -5 (lowest volume) and +5 (highest volume), and the
frequency characteristic is set to a band that is emphasized by dividing into high, middle and low
frequencies, and an automobile The volume balance between the rear seat and the front seat is
set between -5 (rear emphasis) and +5 (front emphasis).
Further, as shown in the position condition table of FIG. 4, at the point D (highway), the position
information and the acoustic characteristic information are finely classified in the area of P1 to
Pn−1.
[0046]
The CPU 18 compares the detected vehicle position with the acoustic characteristic table 60,
changes the volume / frequency characteristic, and changes the volume and frequency
characteristic output from the speaker 41.
[0047]
As described above, when the system configuration shown in FIG. 1 and the vehicle position
detection apparatus 100 and the in-vehicle audio reproduction apparatus 200 shown in FIGS. 2
and 3 are associated with each other, the vehicle position detection means 2 The map data
reading means 3 includes a CD-ROM drive 16, a communication interface 17, a CPU 18, a ROM
19, a D-RAM 20, and an S-RAM 21. The map data reading means 3 includes a sensor 12, various
sensors 13, a sensor signal processing unit 14, a GPS receiver 15, and a CPU 18. , An image
processor 22, a kanji font ROM 23, a V-RAM 24, and an RGB conversion circuit 25. The vehicle
position display device 4 comprises a display and operation unit 26. The arbitrary position
storage device 5 and the volume and frequency characteristic storage The means 7 comprises an
S-RAM 21 and the position comparison means 6 comprises a CPU 18.
[0048]
Further, the volume / frequency characteristic automatic changing means 8 comprises an
antenna 31, a tuner 32, a storage medium drive 33, an AUX 34, an interface 35, a volume /
sound quality changing device 36, a CPU 37, an input interface 38 and an input panel 39. 10 is
composed of an AMP 40 and a speaker 41.
[0049]
The operation of the sound reproducing apparatus configured as described above will be
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described based on the flowcharts of FIGS.
7 and 8 are control programs stored in the ROM 19 and executed by the CPU 18.
[0050]
First, when it is desired to automatically change the volume and frequency characteristics output
from the speaker 41 at an arbitrary position, position information, volume and frequency
characteristics are set by the input device 9 (step S1).
[0051]
At this time, the position information is written to the position condition table 50 of the S-RAM
21.
At the same time, the volume and frequency to be automatically changed corresponding to the
position information are written in the acoustic characteristic table 60 of the S-RAM 21 (step S2).
[0052]
Next, while traveling the vehicle, the vehicle position information detected by the direction
sensor 11 and the distance sensor 12 is input to the CPU 18 via the sensor signal processing unit
14 (step S3).
[0053]
At this time, the CPU 18 reads the position information written in the S-RAM 21 (step S4),
compares it with the current vehicle position information input from the sensor signal processing
unit 14 (step S5), and reads it with the vehicle position. It is determined whether the position
data match (step S6).
[0054]
Here, when these two pieces of position information match, the CPU 18 reads the volume and
frequency characteristic data written simultaneously with the position data from the S-RAM 21
(step S7), and reproduces the read volume and frequency characteristic data as voice. The data is
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output to the CPU 37 of the device 200 (step S8).
[0055]
Next, by transmitting the volume and frequency characteristic data from the CPU 37 to the
volume / sound quality changing device 36 (step S9), the sound changed to the set volume and
frequency characteristic is outputted from the speaker (step S10) .
[0056]
On the other hand, when the vehicle position and the position data read in step S6 do not match,
the CPU 37 does not change the volume and frequency characteristics to the volume / sound
quality changing device 36 (step S11). The voice as it is is output (step S12).
[0057]
FIG. 8 shows a control for storing a history when the volume and frequency characteristics have
been changed in the past, and changing the audio output based on the history.
[0058]
In FIG. 8, first, when it is desired to automatically change the volume and frequency
characteristics output from the speaker 41 at an arbitrary position, position information, volume
and frequency characteristics are set by the input device 9 (step S21).
[0059]
At this time, the position information is written to the position condition table 50 of the S-RAM
21.
At the same time, the volume and frequency to be automatically changed corresponding to the
position information are written in the acoustic characteristic table 60 of the S-RAM 21.
[0060]
At this time, the CPU 18 reads from the S-RAM 21 the position, volume and frequency
characteristics data written in the S-RAM 21 at the time of changing the volume and frequency
characteristics in the past (step S22). And each read data are compared (step S23), and it is
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determined whether all the compared data match (step S24).
[0061]
At this time, if the data such as the change amount of the sound volume is matched, the data is
written again as the automatic change data in the S-RAM 21 (step S25).
If the compared data do not match, the position, the volume, and the frequency characteristic 21
are written in the S-RAM 21 (step S26) as the change history.
[0062]
On the other hand, when the vehicle position and the position of the data for automatic change
coincide with each other, processing similar to that of the flowchart of FIG. 7 is executed (steps
S7 to S12).
[0063]
As described above, the audio reproduction device according to the present embodiment controls
the audio signal output from the speaker 41 with the volume and frequency characteristics
obtained from the S-RAM 21 according to the current position of the moving object. Audio
adjusted according to the volume and frequency characteristics according to the position can be
output from the speaker 41.
[0064]
Further, the S-RAM 21 is provided with a position condition table 50 for correlating position
information and position conditions, and an acoustic characteristic table for correlating the
position conditions and acoustic characteristic information, from the position condition table 50
a position according to the current position of the vehicle. Since the condition is obtained and
acoustic characteristic information corresponding to the position condition is obtained from the
acoustic characteristic table 60, when the current position of the vehicle becomes a
predetermined position condition such as a highway or a parking lot, the position condition is
The sound adjusted according to the acoustic characteristic according to can be output from the
speaker 41.
[0065]
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In addition, since the input unit 9 for inputting the acoustic characteristic information, the
acoustic characteristic information inputted by the input unit 9 and the current position of the
vehicle are associated with each other and stored in the S-RAM 21, the acoustic characteristic
information is inputted and adjusted. At the position where the same position as the adjusted
position or the adjusted position, the sound adjusted according to the acoustic characteristic
input and adjusted in advance can be output from the speaker 41.
[0066]
The acoustic characteristic information used for the control is not limited to the combination of
the volume, the frequency characteristic, and the volume balance of the rear seat and the front
seat as described above, but at least one of the volume, the frequency characteristic, and the
volume balance of the rear seat and the front seat Or other acoustic characteristic information
may be used.
[0067]
Here, if at least the volume is selected, it is possible to make it easy to hear the reproduced sound
or the sound generated outside the vehicle where the state outside the vehicle can be recognized
by simple level adjustment such as an electronic volume. It can make it harder to be masked by
sounds outside the car (for example, road road noises on the highway), and can distinguish
between playback sounds and sounds outside the car (for example, warning sounds for crossings)
to make it easier to hear, or at least rear seat and front seat When the volume balance is set, the
passenger can easily hear the reproduced sound, and the driver can easily hear either the
reproduced sound or the sound outside the vehicle according to the location.
[0068]
In addition, instead of controlling with the acoustic characteristic information of the volume
balance of the rear seat and the front seat, acoustic characteristic information indicating the
volume balance (left and right balance) with the speakers respectively provided on the left and
right and the volume balance of the front, rear, left and right speakers It may be used to make it
easy to listen to sounds outside the vehicle at the driver's seat, or to make it easy to listen to the
reproduced sound at the passenger seat or the rear seat.
[0069]
In particular, by setting the acoustic characteristic information as shown in FIG. 5, for example,
the whole volume is lowered near the crossing (point A) to make it easier to hear the warning
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sound of the crossing, and further emphasizing the high frequency part of the reproduced sound.
By this, it is possible to make it easy to hear both the alarm sound and the reproduced sound,
which are low to middle.
In addition, in the vicinity of the intersection (point B), the driver can easily hear the ambient
sound at the intersection by lowering the volume on the front side, which is the driver's side,
more than the rear side. can do.
[0070]
Further, in the vicinity of the parking lot (point C), sound leakage to the outside of the vehicle
(particularly, low and high frequencies) is reduced, and it is possible to make it easy for the
passenger and the like to hear the reproduced sound.
In addition, on the expressway (point D), the overall volume is raised and low and high
frequencies that are easily masked by road noise and wind noise so that the reproduced sound is
not difficult to hear due to road noise or wind noise caused by high-speed driving. By
emphasizing it, it is possible to make the reproduced sound easy to hear.
[0071]
In the vicinity of the toll gate on the expressway (point E), the volume on the front side is lowered
much more than the volume on the rear side, so that it will not interfere with the driver's toll
collection and make the reproduced voice easy to hear by the passenger. be able to.
[0072]
In addition, by using the result of detecting the traveling speed, even when traveling on a high
speed road, when traveling at a low speed due to traffic congestion, the degree of controlling the
acoustic characteristics is made small, or the control of the acoustic characteristics is controlled.
It may be made to stop, and when passing in the opposite direction in the vicinity of a parking lot
etc., when the equal speed is fast, the degree of controlling the acoustic characteristics may be
reduced or stopped.
[0073]
In addition, the time of processing for controlling the reproduction voice to the acoustic
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characteristic according to the position information with respect to the time of detection of the
position information of the characteristic may immediately execute the process or even with a
predetermined time lag. good.
[0074]
Furthermore, the processing may be executed by controlling the time lag adaptively according to
the position condition or the set value of the acoustic characteristic or the speed.
In this case, when approaching a crossing or the like, if the speed is high, the control of the
playback voice is started from a place far from the crossing position, and if the speed is slow, the
control of the playback voice is started from a place near the crossing. The time from the start to
the arrival at the crossing can be the same.
[0075]
According to the present invention, it is possible to output from the output means the sound
adjusted in accordance with the volume or frequency characteristics according to the current
position of the moving body.
[0076]
Brief description of the drawings
[0077]
1 is a block diagram showing the overall configuration of an embodiment of the audio output
device according to the present invention
[0078]
Figure 2 block diagram of the vehicle position detection device of one embodiment
[0079]
Fig. 3 A block diagram of an on-vehicle audio reproduction apparatus according to one
embodiment
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[0080]
4 is a diagram showing a position condition table of one embodiment
[0081]
FIG. 5 is a diagram showing an acoustic characteristic table according to one embodiment.
[0082]
6 is a diagram showing the map data of one embodiment
[0083]
Flow chart showing the procedure of the audio reproduction method of FIG. 7 embodiment
[0084]
Flow chart showing another procedure of the audio reproduction method of FIG. 8 embodiment
[0085]
FIG. 9 shows a conventional audio reproduction apparatus
[0086]
Explanation of sign
[0087]
DESCRIPTION OF SYMBOLS 1 Voice reproduction apparatus 2 Vehicle position detection means
(present position detection means) 3 Map data readout means 5 Arbitrary position storage
means (storage control means) 7 Volume / frequency characteristic storage means (acoustic
characteristic storage means) 8 Volume / frequency characteristic automatic Changing means
(acoustic characteristic control means) 9 Input device (input means) 10 Output device (voice
output means) 50 Position condition table 60 Acoustic characteristic table
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