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JPWO2014125669

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DESCRIPTION JPWO2014125669
Abstract: The device of the present invention relates to a voice input device for obtaining high
quality voice with reduced mixed noise. The voice input device is attached to the sound insulation
block attached to the ceiling member in the vehicle and the side surface of the sound insulation
block on the side closer to the occupant of the vehicle or the ceiling member in the vicinity
thereof, and the voice of the occupant and noise in the vehicle are mixed. Attached to the side of
the sound insulation block on the side far from the occupant or in the vicinity of the first
microphone that outputs the first signal to the noise suppression means for inputting the mixed
sound and outputting the emphasized voice signal And a second microphone that receives noise
in the vehicle and outputs a second signal to the noise suppression unit.
Voice input device, voice processing method, voice processing program, ceiling member and
vehicle
[0001]
The present invention relates to a technique for suppressing noise from a mixed sound in which
a desired signal and noise are mixed.
[0002]
In the above technical field, Patent Document 1 is provided with a sound insulator having a cross
section of “く” or “L”, and mainly receives a first microphone for inputting a speaker's voice
and mainly inputs noise. There is disclosed a technique for isolating sound between the second
microphone and the second microphone.
03-05-2019
1
[0003]
International Publication No. 2012/09607
[0004]
However, in the technique described in the above document, the state of sound insulation
changes depending on the directions of the audio source and the noise source, and in particular,
the relationship between noises input to the first microphone and the second microphone
changes.
As a result, a high quality desired signal can not be obtained regardless of the direction of the
desired signal or noise.
[0005]
An object of the present invention is to provide a technique for solving the above-mentioned
problems.
[0006]
In order to achieve the above object, the voice input device according to the present invention is
mounted on a sound insulation block attached to a ceiling member in a vehicle and the ceiling
member on the side of the sound insulation block near the occupant of the vehicle or in the
vicinity thereof A first microphone for inputting a mixed sound in which the voice of the
occupant and noise in the vehicle are mixed, and outputting a first signal to the noise
suppression means, and a side surface of the sound insulation block on the side far from the
occupant Or a second microphone attached to the ceiling member in the vicinity thereof for
inputting noise in the vehicle and outputting a second signal to the noise suppression means.
[0007]
In order to achieve the above object, a voice processing method according to the present
invention is provided by a first microphone provided on a side surface of a sound insulation
block mounted on a ceiling member in a vehicle, the ceiling member near the occupant of the
vehicle or in the vicinity thereof And a noise isolation block attached to a ceiling member in the
vehicle, the step of outputting a first signal to the noise suppression means by inputting a mixed
sound in which the voice of the occupant of the vehicle and the noise in the vehicle are mixed
And a second microphone provided on the ceiling member at or near the side surface far from
03-05-2019
2
the occupant of the vehicle inputs noise in the vehicle and outputs a second signal to the noise
suppression means; And suppressing the noise based on the first signal and the second signal,
and outputting an enhanced voice signal.
[0008]
In order to achieve the above object, a voice processing program according to the present
invention comprises a first microphone provided on a side surface of a sound insulation block
attached to a ceiling member in a vehicle, or on the ceiling member near or near the vehicle
occupant. And a noise isolation block attached to a ceiling member in the vehicle, the step of
outputting a first signal to the noise suppression means by inputting a mixed sound in which the
voice of the occupant of the vehicle and the noise in the vehicle are mixed And a second
microphone provided on the ceiling member at or near the side surface far from the occupant of
the vehicle inputs noise in the vehicle and outputs a second signal to the noise suppression
means; The suppression means suppresses noise based on the first signal and the second signal,
and outputs the enhanced voice signal to the computer.
[0009]
In order to achieve the above-mentioned object, a ceiling member concerning the present
invention is provided with the above-mentioned voice input device.
[0010]
In order to achieve the above object, a vehicle according to the present invention includes the
voice input device.
[0011]
According to the present invention, it is possible to obtain a high-quality desired signal with
reduced mixed noise.
[0012]
FIG. 1 is a block diagram showing a configuration of a voice input device according to a first
embodiment of the present invention.
It is a block diagram which shows the structure of the speech processing system containing the
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speech input device which concerns on 2nd Embodiment of this invention.
It is a figure which shows the structure of the noise suppression circuit which concerns on 2nd
Embodiment of this invention.
It is a figure which shows the arrangement | positioning range of the speech input device based
on 2nd Embodiment of this invention.
It is a figure which shows the planar shape of the sound insulation block which concerns on 2nd
Embodiment of this invention.
It is a figure which shows the cross-sectional shape of the sound insulation block which concerns
on 2nd Embodiment of this invention.
It is a figure for showing the combination of the plane shape of the sound insulation block
concerning a 2nd embodiment of the present invention, and section shape, and its solid shape.
It is a figure explaining the speech input device concerning a 3rd embodiment of the present
invention.
It is a figure which shows the retract structure of the sound insulation block which concerns on
4th Embodiment of this invention.
It is a figure which shows the structure of the retract drive control part of the sound insulation
block which concerns on 4th Embodiment of this invention. It is a figure which shows the
structure of the retract determination table which concerns on 4th Embodiment of this invention.
It is a flowchart which shows the procedure of the retraction process of the sound insulation
block which concerns on 4th Embodiment of this invention. It is a figure explaining the speech
input device concerning a 5th embodiment of the present invention. It is a figure explaining the
speech input device concerning a 5th embodiment of the present invention. It is a figure which
shows the rotation structure of the sound insulation block which concerns on 6th Embodiment of
this invention. It is a figure which shows the structure of the rotational drive control part of the
sound insulation block which concerns on 6th Embodiment of this invention. It is a figure which
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shows the structure of the rotation determination table which concerns on 6th Embodiment of
this invention. It is a flowchart which shows the procedure of a rotation process of the sound
insulation block which concerns on 6th Embodiment of this invention. It is a figure explaining the
speech input device concerning a 7th embodiment of the present invention. It is a figure which
shows the structure of the audio | voice input set selection part which concerns on 7th
Embodiment of this invention. It is a figure which shows the structure of the audio | voice input
set selection table which concerns on 7th Embodiment of this invention. It is a flowchart which
shows the procedure of the selection process of the audio | voice input set which concerns on
7th Embodiment of this invention. It is a figure which shows the structure of the speech input
device based on 8th Embodiment of this invention. It is a figure which shows the structure of the
speech input device based on 9th Embodiment of this invention.
[0013]
Hereinafter, embodiments of the present invention will be exemplarily described in detail with
reference to the drawings. However, the components described in the following embodiments are
merely examples, and the scope of the present invention is not limited to them. For example, in
the following embodiment, the sound insulation block and the first and second microphones are
illustrated as being in contact with each other. However, from the sound insulation block, it is an
arrangement that achieves sound insulation of the desired signal input to the second microphone
by the sound insulation block and noise insulation to the noise input to the first microphone and
the second microphone by the sound insulation block. It may be a distant position.
[0014]
First Embodiment A voice input device 100 according to a first embodiment of the present
invention will be described with reference to FIG. The voice input device 100 is a device that
outputs a high quality signal to the noise suppression unit in order to obtain voice and noise in
which mixed noise is reduced.
[0015]
As shown in FIG. 1, the voice input device 100 includes a sound insulation block 101, a first
microphone 102, and a second microphone 103. Sound insulation block 101 is attached to a
ceiling member in vehicle 150. The first microphone 102 is attached to the side or ceiling
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member of the sound insulation block 101 on the side closer to the occupant of the vehicle 150.
Then, a mixed sound in which the voice 170 of the occupant 120 and the noise 180 in the
vehicle 150 are mixed is input, and the first signal 104 is output to the noise suppression unit
106. The second microphone 103 is attached to the side or ceiling member of the sound
insulation block 101 on the side far from the occupant 120, inputs the noise 180 in the vehicle
150, and outputs the second signal 105 to the noise suppression unit 106.
[0016]
According to this embodiment, the voice is input to the first microphone and the voice to the
second microphone is shut off, and the noise coming from the direction other than the voice is
similarly input to the first microphone and the second microphone. Therefore, the noise
suppression unit can obtain high-quality speech in which mixed noise is reduced.
[0017]
Second Embodiment Next, a voice input device according to a second embodiment of the present
invention will be described. In the voice input device according to the present embodiment, the
first microphone for mainly inputting voice is arranged on the both sides of the sound insulation
block near the occupant, and the second microphone for inputting noise is arranged on the far
side of the occupant. Then, the first microphone inputs mixed sound of the voice of the occupant
and the noise inside the vehicle, and the second microphone inputs noise in the vehicle in which
the noise of the passenger is isolated by the sound insulation block. A signal representing the
mixed sound of the first microphone and the noise of the second microphone is sent to a noise
suppression circuit to generate a noise-suppressed emphasis signal.
[0018]
According to the present embodiment, the noise isolation block isolates the passenger's voice
input to the second microphone, and the noise isolation block does not separate the vehicle
interior space, so there is no difference in noise input to the first microphone and the second
microphone. Therefore, it is possible to obtain high quality voice with reduced noise mixed from
the first microphone and the second microphone.
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[0019]
<< Configuration of Voice Processing System >> FIG. 2 is a block diagram showing a
configuration of a voice processing system including the voice input device 200 according to the
present embodiment. FIG. 2 shows a vehicle in which the voice input device 200 of the present
embodiment is disposed at a position where the voice 221 uttered by the driver 220 is input, that
is, a predetermined position of the ceiling member 210 above the driver's seat in the vehicle. An
audio processing system is illustrated. Although in FIG. 2 the voice input device 200 is installed
at the upper part of the driver's seat, the voice input device 200 is installed at the upper part of
the passenger seat side in order to input the voice uttered by the passenger seated in the
passenger seat. May be
[0020]
The voice input device 200 of the present embodiment includes a sound insulation block 201, a
first microphone 202, and a second microphone 203. The sound insulation block 201 isolates
the voice 221 uttered by the driver 220 to make it difficult to input to the second microphone
203. On the other hand, the sound insulation block 201 has a size and a shape in which the noise
211 in the vehicle is similarly input to the first microphone 202 and the second microphone 203,
and is installed at such a position. Therefore, when the noise input to the second microphone
203 is removed from the mixed sound of the sound 221 and the noise 211 input to the first
microphone 202, the voice 221 uttered by the driver 220 can be obtained.
[0021]
However, the sound 221 input to the second microphone 203 is not zero. Also, the noise 211
input to the first microphone 202 and the noise 211 input to the second microphone 203 are not
completely equal. Therefore, the mixed signal 204 output from the first microphone 202 is input
to the on-vehicle noise suppression circuit 230 through the signal line. On the other hand, the
noise signal 205 output from the second microphone 203 is input to the on-vehicle noise
suppression circuit 230 through a signal line. The noise suppression circuit 230 outputs an
emphasized voice signal 231 in which noise is suppressed based on the mixed signal 204 and the
noise signal 205. The emphasized voice signal 231 is input to the voice processing device 240
and processed as the voice 221 of the driver 220. The processing of the voice processing device
240 is not a feature of the present embodiment, and thus detailed description will be omitted.
03-05-2019
7
[0022]
As shown in FIG. 2, the sound insulation block 201 according to the present embodiment blocks
the input of the voice 221 uttered by the driver 220 to the second microphone 203 even if the
sound insulation block 201 does not greatly protrude from the ceiling member 210, and the
driver 220. It does not block the input to the first microphone 202 of noise coming from various
directions other than the above.
[0023]
<< Configuration of Noise Suppression Circuit >> FIG. 3 is a diagram showing the configuration of
the noise suppression circuit 230 according to the present embodiment.
Although the signal from the second microphone 203 is the noise signal 205, it is actually a
mixed signal including a slight audio signal.
[0024]
The noise suppression circuit 230 has a subtractor 301 that subtracts the estimated noise signal
Y1 estimated to be mixed in the mixed signal 204 from the mixed signal X1 (204). In addition, it
has a subtractor 303 that subtracts the estimated voice signal Y 2 estimated to be mixed with the
noise signal X 2 (205) from the noise signal 205. Further, it has an adaptive filter NF 302 that is
an estimated noise signal generation unit that generates the estimated noise signal Y 1 from the
enhanced noise signal E 2 that is the output signal of the subtractor 303. Further, it has an
adaptive filter XF 304 which is an estimated speech signal generation unit that generates an
estimated speech signal Y 2 from an enhanced speech signal E 1 (231) which is an output signal
of the subtractor 301. An example of adaptive filter XF 304 is described in WO 2005/024787.
Even when the target voice is looped around the sound insulation block 201 and input to the
second microphone 203 and the voice signal is mixed in the noise signal 205, the adaptive filter
XF 304 mixes the voice signal of the looped voice in the subtractor 301 Accidental removal from
204 can be prevented.
[0025]
With this configuration, the subtractor 301 subtracts the estimated noise signal Y1 from the
mixed signal X1 (204) transmitted from the first microphone 202, and outputs the enhanced
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voice signal E1 (231).
[0026]
Here, the estimated noise signal Y1 is generated by processing the enhanced noise signal E2 by
the adaptive filter NF302 using parameters that change based on the enhanced voice signal E1
(231).
The emphasis noise signal E2 is a signal obtained by subtracting the estimated voice signal Y2 by
the subtractor 303 from the noise signal 205 transmitted from the second microphone 203 by
the signal line.
[0027]
The estimated voice signal Y2 is generated by processing the enhanced voice signal E1 (231) by
the adaptive filter XF 304 using parameters that change based on the enhanced noise signal E2.
[0028]
The noise suppression circuit 230 may be an analog circuit, a digital circuit, or a mixed circuit
thereof.
If the noise suppression circuit 230 is an analog circuit, the enhanced voice signal E1 (231) is
converted into a digital signal by the A / D converter when it is used for digital control. On the
other hand, if the noise suppression circuit 230 is a digital circuit, the signal from the
microphone is converted into a digital signal by the A / D converter before entering the noise
suppression circuit 230. When an analog circuit and a digital circuit are mixed, for example, the
subtractors 301 and 303 may be configured by analog circuits, and the adaptive filter NF302
and the adaptive filter XF 304 may be configured by analog circuits controlled by digital circuits.
Conceivable. Further, the noise suppression circuit 230 of FIG. 3 is one of the circuit examples
suitable for the present embodiment, and an existing circuit that subtracts the estimated noise
signal from the mixed signal and outputs an emphasized voice signal can be used. The distinctive
structure of the two microphones and the sound insulation block of the embodiment enables
noise suppression. For example, adaptive filter XF 304 of FIG. 3 can be an alternative to a circuit
that outputs a constant level to filter out the diffused speech. Also, the subtractor 301 and / or
03-05-2019
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303 can be replaced with an integrator by representing the estimated noise signal Y1 and the
estimated speech signal Y2 with coefficients to be integrated on the mixed signal 204 and the
noise signal 205, respectively.
[0029]
<< Arrangement of Voice Input Device >> FIG. 4 is a view showing the arrangement range of the
voice input device 200 according to the present embodiment. FIG. 4 is a top view of the driver's
seat of the vehicle. Although the arrangement range will be described below in relation to the
driver 220 of the driver's seat, the same applies to other occupants of other seats.
[0030]
The range in which the voice input device 200 of the present embodiment is disposed is a
circular area 402 within a circular boundary 401 which is the furthest from the driver 220 right
above the driver 220. The circular boundary 401 is a limit position where the voice of the driver
220 can sufficiently reach.
[0031]
In addition, although shown by the circular boundary 401 in FIG. 4, the deformation |
transformation by the internal structure of a vehicle may also be made. Moreover, although the
arrangement | positioning range was provided also behind the driver | operator 220, the front of
the driver | operator 220 or diagonal front is desirable. Further, since the placement range also
changes according to the height of the driver 220's mouth, for example, the placement may be
moved to an appropriate position.
[0032]
<< Sound insulation block >> Hereinafter, the material and shape of the sound insulation block
201 will be described.
[0033]
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10
(Material) The sound insulation block is desirably a substance having a large mass and a high
density.
Such materials require more energy to vibrate and thus can prevent sound penetration.
Moreover, the soft material is desirable for the inside of the sound insulation block. Since soft
materials absorb sound easily, it is possible to prevent unnecessary sound penetration by using
soft materials on the inner surface of the sound insulation block. However, it is desirable that the
interior of the sound insulation block is not gas to prevent resonance. Further, it is preferable
that the material of the surface on the first microphone side and the material of the surface on
the second microphone side be divided without being continuous. If the structure is continuous,
the sound propagates through the surface material and penetrates the sound insulation block, so
it has a three-layer structure, and a soft material is sandwiched between the materials on both
surfaces. Is desirable.
[0034]
(Planar Shape) FIG. 5A is a view showing a planar shape of the sound insulation block 201
according to the present embodiment. The planar shape is a planar shape 510 obtained by
mapping the sound insulation block 201 onto the ceiling member 210, as shown at the top of
FIG. 5A. The planar shape is not limited to FIG. 5A. For example, although a quadrilateral shape, a
triangular shape, or a circular shape is shown in FIG. 5A, another polygonal shape such as a
pentagon or a hexagonal shape may be used. The first microphone 202 and the second
microphone 203 may be placed at symmetrical positions with the sound insulation block 201 at
the center.
[0035]
The planar shape 511 is rectangular, and the first microphone 202 is arranged on the side closer
to the occupant (speaker), and the second microphone 203 is arranged on the side farther to the
occupant. The planar shape 512 is a triangle, and the first microphone 202 is disposed at the
base near the occupant (speaker), and the second microphone 203 is disposed at the vertex
distant from the occupant. The planar shape 513 is a shape in which the base of the triangle is
recessed, and the first microphone 202 is disposed in the recess on the base closer to the
occupant (speaker), and the second microphone 203 is disposed at the vertex on the side distant
to the occupant. The planar shape 514 is a triangle, and the first microphone 202 is disposed at
03-05-2019
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the vertex near the occupant (speaker), and the second microphone 203 is disposed at the
bottom distant from the occupant.
[0036]
The planar shape 515 is circular, and the first microphone 202 is arranged on the side closer to
the occupant (speaker), and the second microphone 203 is arranged on the side farther to the
occupant. If it is circular, it may be an ellipse or another distorted circle. The planar shape 516 is
a circular gourd type, and the first microphone 202 is disposed in a recess near the occupant
(speaker), and the second microphone 203 is disposed in a recess distal to the occupant.
[0037]
(Cross-sectional shape) FIG. 5B is a view showing a vertical cross-sectional shape of the sound
insulation block 201 according to the present embodiment. In addition, as shown in the
uppermost part of FIG. 5B, the cross-sectional shape is a cross-sectional shape obtained by
cutting the sound insulation block 201 perpendicularly to the lower surface of the ceiling
member 210 and by a plane connecting the first microphone 202 and the second microphone
203. It is 520. The cross-sectional shape is not limited to FIG. 5B. For example, although the
characteristic shape is shown in FIG. 5B, it may be an intermediate shape of them.
[0038]
The cross-sectional shape 521 is a rectangle, and the first microphone 202 is disposed on the
side closer to the occupant (speaker), and the second microphone 203 is disposed on the side
closer to the occupant. The cross-sectional shape 522 is arcuate, and the first microphone 202 is
disposed closer to the occupant (speaker), and the second microphone 203 is disposed farther to
the occupant. The cross-sectional shape 523 is a form similar to a right triangle having the
ceiling member 210 side as one side other than the oblique side, and the first microphone 202 is
disposed on the side of the oblique side, and the second microphone 203 is the other side other
than the oblique side. Placed on the side of The first microphone 202 is disposed at the end of
the long side closer to the occupant (speaker), and the second microphone 203 is disposed at the
short side closer to the occupant. The cross-sectional shape 524 is an obtuse triangle, and is
attached such that the longer side of the sides sandwiching the obtuse angle is the ceiling
member 210 side. The first microphone 202 is disposed near where the long side (the side
03-05-2019
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opposite to the obtuse angle vertex) closer to the occupant (speaker) contacts the ceiling, and the
second microphone 203 is disposed near the obtuse vertex at the side far from the occupant. The
cross-sectional shape 525 is similar to a right triangle, and the first microphone 202 is arranged
on the short side closer to the occupant (speaker), and the second microphone 203 is arranged
on the tip of the long side farther to the occupant.
[0039]
In the cross-sectional shape 526, the bottom side is on the ceiling member 210 side, the first
microphone 202 is disposed at the end of the side closer to the occupant (speaker), and the
second microphone 203 is disposed at the end of the side farther to the occupant. Ru. The crosssectional shape 527 is a trapezoid whose bottom side is on the side of the ceiling member 210,
and the first microphone 202 is disposed at the end of the bottom near the occupant (speaker),
and the second microphone 203 is disposed at the end of the bottom far from the occupant. Ru.
The cross-sectional shape 528 has a recess on the short side of the obtuse triangle, and the first
microphone 202 is disposed at the end of the long side closer to the occupant (speaker), and the
second microphone 203 is disposed in the recess on the side distant to the occupant. Ru.
[0040]
(Three-Dimensional Shape: Combination of Planar Shape and Cross-sectional Shape) FIG. 6 is a
view showing a combination of the planar shape and the cross-sectional shape of the sound
insulation block according to this embodiment and the three-dimensional shape thereof. FIG. 6 is
a tabular form showing the plane shape of FIG. 5A horizontally and the cross-sectional shape of
FIG. 5B vertically, and describes the main characteristic three-dimensional shapes in each frame.
The three-dimensional shape is not limited to the description in the frame. The planar shape 516
in FIG. 5A is left blank because there is no appropriate name for the three-dimensional shape.
[0041]
According to the present embodiment, the noise isolation block isolates the passenger's voice
toward the second microphone, and the noise isolation block does not separate the vehicle
interior space, so there is no difference in noise input to the first and second microphones.
Therefore, high-quality speech in which mixed noise is reduced can be obtained in the noise
suppression unit.
03-05-2019
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[0042]
Third Embodiment Next, a voice input device according to a third embodiment of the present
invention will be described. The voice input device according to this embodiment is different
from the second embodiment in that the sound insulation block is retractable and can be
accommodated in the ceiling member 210 when not used. The other configuration and operation
are the same as those of the second embodiment, and thus the detailed description of the same
configuration and operation will be omitted.
[0043]
According to the present embodiment, in addition to the effects of the second embodiment, since
the sound insulation block can be accommodated when the sound insulation block is not used,
the appearance of the ceiling is less impaired.
[0044]
<< Configuration of Voice Input Device >> FIG. 7 is a view for explaining a voice input device 700
according to the present embodiment.
[0045]
In the left view of FIG. 7, the sound insulation block 201 projects from the ceiling member 210 to
isolate the voice of the passenger and work to prevent the sound from reaching the second
microphone 203.
The voice input device 700 incorporates a retract mechanism 701 that helps the sound
insulation block 201 in and out of the ceiling member 210.
The right view of FIG. 7 shows a state in which the sound insulation block 201 is housed in the
ceiling member 210. In this state, the sound insulation block 201 does not work to prevent the
voice of the occupant from reaching the second microphone 203.
03-05-2019
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[0046]
The configuration or operation of the noise suppression circuit 230 may be changed depending
on whether the sound insulation block 201 is housed in the ceiling member 210. For example,
only the input of the first microphone 202 may be used when stored.
[0047]
In FIG. 7, the user puts the sound insulation block 201 in and out of the ceiling member 210
manually. For example, the retract mechanism 701 is housed and locked in the ceiling member
210 when the sound insulation block 201 is pushed up by hand as shown in the right figure, and
when the sound insulation block 201 is slightly pushed up as shown in the left figure, the lock is
fixed. It may be an up and down movement mechanism which is separated and protrudes
downward. The structure of the retraction mechanism 701 may use any known structure and is
not limited. Furthermore, the first microphone 202 and the second microphone 203 may be
simultaneously protruded and stored while being fixed to the sound insulation block 201.
[0048]
Fourth Embodiment A voice input device according to a fourth embodiment of the present
invention will now be described. The voice input device according to the present embodiment
differs from the voice input device according to the third embodiment in that the sound
insulation block can be automatically taken out from or stored in the ceiling member based on
the environment in the vehicle. The other configuration and operation are the same as those of
the third embodiment, and thus the detailed description of the same configuration and operation
will be omitted. For example, please refer to FIG. 7 of the third embodiment for the state of
insertion and removal of the sound insulation block.
[0049]
According to the present embodiment, in addition to the effects of the third embodiment, it is not
necessary for the passenger to perform the operation of retracting the sound insulation block.
[0050]
The manual retracting process of the occupant of the third embodiment may be prioritized over
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the automatic retracting process of the present embodiment.
[0051]
<< Retract Configuration of Sound Insulation Block >> FIG. 8 is a view showing a retract
configuration 800 of the sound insulation block 201 according to the present embodiment.
The retract configuration 800 is not limited to FIG.
[0052]
The retract configuration 800 has a retract mechanism 801 that automatically takes the sound
insulation block 201 in and out of the ceiling member, and a retract drive control unit 810 that
controls the drive of the retract mechanism 801.
The retract mechanism 801 may be configured to include the retract mechanism 701 shown in
FIG. 7 and a start source such as a motor for driving the same. The retraction mechanism 801
and the retraction drive control unit 810 are connected by electric wires that apply opposite
drive voltages 802 and 803 when the sound insulation block 201 is taken out and stored. The
retract drive control unit 810 receives the input signal group from the sensor, which is a
condition for taking in and out the sound insulation block 201, and if the condition for taking in
and out the sound insulation block 201 is satisfied, between the drive voltages 802 and 803.
Current flows.
[0053]
(Retract Drive Control Unit) FIG. 9 is a view showing the configuration of the retract drive control
unit 810 of the sound insulation block 201 according to the present embodiment. Note that the
retract drive control unit 810 is not limited to FIG.
[0054]
The retract drive control unit 810 determines a retract determination unit 910 that determines
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whether to output or store the sound insulation block 201 from the input of the sensor input
group, and a drive circuit 920 that drives the retract mechanism 801 according to the result of
the retract determination unit 910. Have.
[0055]
The retract determination unit 910 includes a processor 911 that controls whether the sound
insulation block 201 is to be output or stored, and a retract determination table 912 that is used
to determine whether the sound insulation block 201 is to be output or stored.
The retract determination table 912 associates and stores the input of the sensor input group
and the determination result 913 as to whether the sound insulation block 201 is to be output or
stored.
[0056]
In addition, the drive circuit 920 receives the determination result 913 from the retract
determination unit 910 and applies drive voltages 802 and 803 to the retract mechanism 801.
Note that various known circuits can be applied to the drive circuit 920, and are not limited.
[0057]
(Retract Determination Table) FIG. 10 is a diagram showing the configuration of the retract
determination table 912 according to the present embodiment. The retraction determination
table 912 is used for the retraction determination unit 910 of the retraction drive control unit
810 to determine whether or not the sound insulation block 201 is to be retracted.
[0058]
The retraction determination table 912 is a table for determining the determination result 913 of
the insertion and removal of the sound insulation block 201 on the condition of data from
various sensor input groups. As conditions for taking out the sound insulation block 201 by
03-05-2019
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various sensor input groups, for example, 1001 when the vehicle speed exceeds the threshold α,
1002 when the air conditioner (hereinafter referred to as air conditioner) noise exceeds the
threshold β, the wiper operates There are cases such as 1003. The present invention is not
limited to the conditions shown in FIG. 10. For example, when the blinker is operating or when
the hazard is operating, or when the engine or motor rotational speed exceeds a certain value,
the audio volume exceeds a certain value In this case, even when an audio response system such
as a car navigation system is operating, it may be considered as a condition for outputting the
sound insulation block 201. The conditions are not limited to these. Basically, the noise isolation
block 201 is output when the noise exceeds the predetermined threshold, and the noise isolation
block 201 is stored when the noise is less than the predetermined threshold.
[0059]
Here, the storage is determined based on whether or not the predetermined threshold value is
exceeded. However, the threshold determination may be performed in multiple stages, and the
sound insulation block 201 may be output in multiple stages. For example, when the vehicle
speed is low, medium or high, the sound insulation block 201 may be set to 0, medium, or all.
[0060]
<< Procedure of Retract Processing >> FIG. 11 is a flow chart showing the procedure of the
retract processing of the sound insulation block 201 according to the present embodiment. This
flowchart is a procedure in which the processor 911 in FIG. 9 determines the determination
result 913 of the insertion and removal of the sound insulation block 201 on the condition of
data from various sensor input groups without using the retraction determination table 912. In
addition, FIG. 11 shows a part of the conditions of rotation of the sound insulation block 201,
and is not limited to this.
[0061]
The processor 911 determines in step S1101 whether the vehicle speed exceeds the threshold
value α. If the vehicle speed exceeds the threshold value α, the processor 911 pushes the sound
insulation block 201 out of the ceiling member in step S1109.
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[0062]
If the vehicle speed is equal to or less than the threshold value α, the processor 911 determines
in step S1103 whether the air conditioner noise has exceeded the threshold value β. If the air
conditioner noise exceeds the threshold value β, the processor 911 pushes the sound insulation
block 201 out of the ceiling member in step S1109.
[0063]
If the air conditioner noise is less than or equal to the threshold value β, the processor 911
determines in step S1105 whether the wiper is operating. If the wiper is in operation, the
processor 911 pushes the sound insulation block 201 out of the ceiling member in step S1109.
[0064]
Hereinafter, the processor 911 determines the sound insulation in step S1107 if the conditions
for pushing out the other sound insulation block 201 from the ceiling member are determined
and all the conditions are not satisfied, or if the conditions for storing the sound insulation block
201 in the ceiling member are satisfied. The block 201 is housed in the ceiling member 210.
[0065]
According to the present embodiment, in addition to the effects of the third embodiment, it is not
necessary for the passenger to perform the operation of retracting the sound insulation block.
[0066]
Fifth Embodiment Next, a voice input device according to a fifth embodiment of the present
invention will be described.
In the voice input device according to the present embodiment, compared to the first to fourth
embodiments, the sound insulation block is rotatable, and the first microphone 202 is directed in
the direction of the occupant who should receive voice. Differs in that they can
03-05-2019
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The other configuration and operation are the same as those of the first to fourth embodiments,
and thus the detailed description of the same configuration and operation will be omitted.
[0067]
According to the present embodiment, since the first microphone 202 can be directed to the
occupant who is to input a voice, it is not limited to the occupant of a specific seat, and mixed
noise from the occupant of the desired seat is reduced. High quality voice can be obtained.
[0068]
In the present embodiment, since the first microphone 202 and the second microphone 203 are
disposed on the side surface of the sound insulation block, the first microphone 202 and the
second microphone 203 also rotate as the sound insulation block 201 rotates. Do.
Alternatively, the sound insulation block, the first microphone 202, and the second microphone
203 may be installed on the same rotary plate. Furthermore, the sound insulation block 201
itself may not rotate, and only the first microphone 202 and the second microphone 203
disposed around the sound insulation block 201 may rotate.
[0069]
<< Voice Input Device >> FIG. 12A is a diagram for explaining a voice input device 1200
according to the present embodiment.
[0070]
In the upper view of FIG. 12A, the driver 1201 and the passenger 1202 are on the driver's seat
and the passenger's seat.
The voice input device 1200 rotates the sound insulation block 201, the first microphone 202,
and the second microphone 203 to input the voice uttered by the driver 1201, and the voice
uttered by the driver 1201 is input to the first microphone 202. The first microphone is directed
to the driver 1201 so as not to be input to the second microphone 203.
03-05-2019
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[0071]
In the lower part of FIG. 12A, the driver 1201 and the passenger 1202 in the driver's seat and
the passenger's seat are on. The voice input device 1200 rotates the sound insulation block 201,
the first microphone 202, and the second microphone 203 to input the voice uttered by the
occupant 1202, and the voice uttered by the occupant 1202 is input to the first microphone 202
and The first microphone is directed toward the occupant 1202 so as not to be input to the
second microphone 203.
[0072]
In FIG. 12A, the sound insulation block 201 rotates around a rotation axis 1210. The rotation is
manually performed by the driver 1201 or the occupant 1202.
[0073]
In the present embodiment, the directions of the first microphone 202 and the second
microphone 203 are changed by rotating the sound insulation block 201, but a plurality of
microphones may be arranged in advance and selectively switched. For example, as in the
example of FIG. 12B, the combination of the first microphone 202a and the second microphone
203a may be switched depending on the direction, or the combination of the first microphone
202b and the second microphone 203b may be switched. . Switching of the combination of
microphones may be performed manually by arranging a switch. Alternatively, the voice input
device 1200 may have a switching control unit that detects the direction in which the voice is
uttered and switches the combination of the microphones so that the first microphone faces in
the uttered direction. With such a configuration, it is possible to obtain the same effect without
rotating operation.
[0074]
Sixth Embodiment Next, a voice input device according to a sixth embodiment of the present
invention will be described. In the voice input device according to the present embodiment,
compared to the fifth embodiment, the sound insulation block rotates so as to direct the first
03-05-2019
21
microphone in the direction of the occupant who should automatically input the voice based on
the environment in the vehicle. It differs in the point. The same applies to the case where only
the microphones arranged around the sound insulation block are rotated without rotating the
sound insulation block itself. The other configuration and operation are the same as those of the
fifth embodiment, and thus the detailed description of the same configuration and operation is
omitted. Note that FIG. 12 of the fifth embodiment should be referred to for how the sound
insulation block rotates in the direction of the occupant who is to input a voice.
[0075]
According to the present embodiment, in addition to the effects of the fifth embodiment, the time
and effort of the rotation operation of the sound insulation block by the occupant is eliminated.
[0076]
The manual rotation processing of the occupant of the fifth embodiment may be prioritized over
the automatic rotation processing of the present embodiment.
[0077]
<< Rotation Configuration of Sound Insulation Block >> FIG. 13 is a view showing a rotation
configuration 1300 of the sound insulation block 201 according to the present embodiment.
The rotation configuration 1300 of the sound insulation block 201 is not limited to FIG.
[0078]
The rotation configuration 1300 of the sound insulation block 201 includes a rotation
mechanism 1301 that rotates the rotation shaft 1210 of the sound insulation block 201, and a
rotation drive control unit 1310 that controls the drive of the rotation mechanism 1301.
The rotation mechanism 1301 may be configured to include an activation source such as a motor
for rotating the rotation shaft 1210 of the sound insulation block 201. The rotation mechanism
1301 and the rotation drive control unit 1310 are connected by an electric wire that applies
opposite drive voltages 1302 and 1303 in the direction in which the sound insulation block 201
03-05-2019
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is rotated. The rotational drive control unit 1310 receives the input signal group from the sensor,
which is a condition of rotation of the sound insulation block 201, and if the condition for
rotating the sound insulation block 201 is satisfied, the drive voltage 1302 is between 1303 and
1303. A current flows. (Rotation Drive Control Unit) FIG. 14 is a view showing a configuration of
a rotation drive control unit 1310 of the sound insulation block 201 according to the present
embodiment. The rotational drive control unit 1310 is not limited to FIG.
[0079]
The rotation drive control unit 1310 drives the rotation mechanism 1301 according to the result
of the rotation determination unit 1410 that determines whether the sound insulation block 201
is rotated and the rotation direction from the input of the sensor input group and the rotation
determination unit 1410 And 1420.
[0080]
The rotation determination unit 1410 includes a processor 1411 that controls whether or not
the sound insulation block 201 is rotated, and determination of the rotation direction, and a
rotation determination table 1412 used to determine whether or not the sound insulation block
201 is rotated and the rotation direction. Have.
The rotation determination table 1412 associates and stores the input of the sensor input group,
whether to rotate the sound insulation block 201 and the determination result 1413 of the
rotation direction.
[0081]
Further, the drive circuit 1420 receives the determination result 1413 from the rotation
determination unit 1410 and applies drive voltages 1302 and 1303 to the rotation mechanism
1301. Note that various known circuits can be applied to the drive circuit 1420 and there is no
limitation.
[0082]
03-05-2019
23
(Rotation Determination Table) FIG. 15 is a view showing the configuration of a rotation
determination table 1412 according to the present embodiment. The rotation determination table
1412 and the rotation determination unit 1410 of the rotation drive control unit 1310 are used
to determine in what direction the sound insulation block 201 is rotated.
[0083]
The rotation determination table 1412 is a table that determines whether the sound insulation
block 201 is to be rotated and the determination result 1413 of the rotation direction based on
data from various sensor input groups. As conditions for rotating the sound insulation block 201
by various sensor input groups, for example, the direction 1501 of the voice input inputted from
the first microphone 202 and the second microphone 203, the riding position of the occupant by
the seat weight sensor under the seat There are 1502 and other manual instructions from the
driver's seat. In addition, it is not limited to the conditions of FIG. Basically, the sound insulation
block 201 rotates the sound insulation block 201 and the second microphone 203 so that the
sound insulation block 201 isolates the sound toward the riding position of the occupant who
wants to input the sound, and the direction of the occupant to input the sound as much as
possible. The first microphone 202 is rotated. In practice, the occupant and the first microphone
202, the sound insulation block 201, and the second microphone 203 are arranged so as to
rotate in a straight line from the occupant. Also, the direction of sound is estimated from the
difference between the sound levels input to the first microphone 202 and the second
microphone 203, and the sound insulation block 201 is rotated so as to direct the first
microphone 202 in the direction of the occupant who is uttering sound. May be The technique
for estimating the direction of voice from the difference between voice levels input to the two
microphones is a known technique, and thus the description thereof is omitted. Furthermore, the
direction of the sound is estimated from the phase difference between the sound signals input to
the first microphone 202 and the second microphone 203, and the sound insulation block 201 is
rotated so as to direct the first microphone 202 in the direction of the occupant uttering the
sound. You can also The technique for estimating the direction of voice from the phase difference
of voice signals input to the two microphones is a known technique known as DOA estimation,
and therefore the detailed description is omitted here.
[0084]
<< Procedure of Rotation Process >> FIG. 16 is a flowchart showing a procedure of rotation
process of the sound insulation block 201 according to the present embodiment. This flowchart
is a procedure in which the processor 1411 in FIG. 14 determines the determination result 1413
03-05-2019
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of the rotation of the sound insulation block 201 on the condition of data from various sensor
input groups without using the rotation determination table 1412. In addition, FIG. 16 shows a
part of the conditions of rotation of the sound insulation block 201, and is not limited to this.
[0085]
In step S1611, the processor 1411 determines whether the voice input direction has changed
based on the microphone input. If it is determined that the voice input direction has changed, the
processor 1411 causes the first microphone 202 to face in the voice input direction in step
S1613, and the sound input to the second microphone 203 is blocked by the sound isolation
block 201. , Sound insulation block 201 (or microphone) is rotated.
[0086]
If it is determined that the voice input direction has not changed, the processor 1411 determines
in step S1621 whether or not there is a change in the seat weight sensor. That is, the seat weight
sensor detects a change when the occupant sits or stands in the seat. If there is a change in the
seat weight sensor, in step S1623, the processor 1411 confirms the direction in which the voice
input device according to the present embodiment is directed based on the information from the
seat weight sensor. In this confirmation, not only the change in the seat weight sensor but also
the voice uttered by the occupant sitting in the back seat of the driver's seat is preferentially
input or voice input according to an algorithm set in advance by the user May be selected.
[0087]
If there is no change in the seat weight sensor, the processor 1411 determines in step S1631
whether or not the seat for which the passenger who is the object of manual voice input has
manually instructed to sit. If a seat where a passenger who is a target of voice input is seated is
instructed, the processor 1411 rotates the sound insulation block 201 toward the instructed seat
at step S1633.
[0088]
According to the present embodiment, in addition to the effects of the fifth embodiment, the time
and effort of the rotation operation of the sound insulation block by the occupant is eliminated.
03-05-2019
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[0089]
Seventh Embodiment Next, a voice input device according to a seventh embodiment of the
present invention will be described.
The voice input device according to the present embodiment includes a plurality of voice input
sets including the sound insulation block, the first microphone, and the second microphone as
compared with the second to sixth embodiments, and is disposed at a plurality of positions in the
vehicle. It differs in that it can be arranged and select an audio input set close to the seat of the
occupant who wants to input audio. The other configuration and operation are the same as those
of the second to sixth embodiments, and thus the detailed description of the same configuration
and operation will be omitted.
[0090]
According to the present embodiment, it is possible to obtain a high quality voice signal by
capturing the voice of the passenger sitting in any seat in the vehicle without being limited to the
passenger sitting in the driver's seat or the passenger seat.
[0091]
<< Configuration of Voice Input Device >> FIG. 17 is a view for explaining a voice input device
according to the present embodiment.
In FIG. 17, a plurality of voice input sets (corresponding to voice input devices in the above
embodiment) including a sound insulation block, a first microphone, and a second microphone
are disposed in the vehicle. FIG. 17 shows an example in which one voice input set 1701 is
provided for the front seat, which is the driver's seat and the front passenger seat, and one voice
input set 1702 is provided for the rear seat. However, each seat may have one voice input set.
[0092]
03-05-2019
26
The voice input set 1701 includes a sound insulation block 1711, a first microphone 1712, and a
second microphone 1713. Also, the voice input set 1702 includes a sound insulation block 1721,
a first microphone 1722, and a second microphone 1723.
[0093]
In the present embodiment, a voice input set arranged corresponding to a seat of a passenger
desired to be input is selected and instructed from a plurality of voice input sets, or automatically
selected based on an input from a sensor input group. . In the left view of FIG. 17, of the voice
input set 1701 and the voice input set 1702, the voice input set 1701 for the front seat is
selected, and is directed to the voice input by the driver 1710. On the other hand, in the right
view of FIG. 17, the voice input set 1702 for the rear seat is selected from the voice input set
1701 and the voice input set 1702, and the voice input direction of the driver 1720 behind the
driver's seat is input. It is suitable for
[0094]
(Voice Input Set Selection Unit) FIG. 18 is a diagram showing a configuration of a voice input set
selection unit 1800 according to the present embodiment. The configuration of the voice input
set selection unit 1800 is not limited to that shown in FIG.
[0095]
The voice input set selection unit 1800 includes a selection control unit 1810, a selection unit
1820, and a manual selection unit 1830.
[0096]
The selection control unit 1810 has an audio input set selection table 1812. The processor 1811
outputs an audio input set selection signal 1813 based on the input of the sensor input group.
The selection unit 1820 includes a selector 1821 that selects an input from the first microphone,
a selector 1822 that selects an input from the second microphone, and a selector 1823 that
selects a control signal of the sound insulation block, and corresponds to the selection signal.
03-05-2019
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Select inputs from multiple voice input sets. The manual selection unit 1830 generates a
selection signal 1813 for manual selection, and outputs the selection signal 1813 to the selection
unit 1820.
[0097]
(Voice Input Set Selection Table) FIG. 19 is a diagram showing the configuration of a voice input
set selection table 1812 according to the present embodiment. The voice input set selection table
1812 is used by the selection control unit 1810 of the voice input set selection unit 1800 to
generate a selection signal to the selection unit 1820.
[0098]
The voice input set selection table 1812 includes a voice analysis result (a result indicating
where the voice is emitted) 1901, a detection result 1902 of the seat weight sensor, a manual
selection instruction 1903, and the like as selection conditions of the voice input set. A voice
input set selection signal 1813 is stored corresponding to the condition 1904 of.
[0099]
<< Selection Processing of Voice Input Set >> FIG. 20 is a flowchart showing a procedure of
selection processing of a voice input set according to the present embodiment.
This flowchart is a procedure in which the processor 1811 in FIG. 18 outputs the selection signal
1813 of the voice input set on the condition of the data from various sensor input groups
without using the voice input set selection table 1812. FIG. 20 shows a part of the selection
conditions of the voice input set, and the present invention is not limited to this.
[0100]
The processor 1811 determines in step S2001 whether or not there is a manual voice input set
change instruction. If there is a voice input set change instruction, the processor 1811 analyzes
the selected content of the voice input set in step S2007, and performs selection processing of a
desired voice input set in step S2009.
03-05-2019
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[0101]
If there is no instruction to change the voice input set, the processor 1811 determines in step
S2003 whether the input from the seat weight sensor has changed. If there is a change in the
input from the seat weight sensor, the processor 1811 analyzes the selected content of the voice
input set in step S2007, and performs selection processing of the desired voice input set in step
S2009.
[0102]
If there is no change in the input from the seat weight sensor, the processor 1811 maintains the
current voice input set selection in step S2005.
[0103]
According to the present embodiment, it is possible to obtain a high quality voice signal by
capturing the voice of the passenger sitting in any seat in the vehicle without being limited to the
passenger sitting in the driver's seat or the passenger seat.
[0104]
Eighth Embodiment Next, a voice input device according to an eighth embodiment of the present
invention will be described.
The voice input device according to this embodiment is different from the second to seventh
embodiments in that the sound insulation block, the first microphone, and the second
microphone are integrated.
The other configurations and the respective operations are the same as in the second to seventh
embodiments, and thus the detailed description of the same configurations and operations will be
omitted.
[0105]
03-05-2019
29
According to the present embodiment, it is not necessary to prepare the sound insulation block,
the first microphone, and the second microphone, respectively, and it is not necessary to arrange
them, and the user can easily install the high quality with reduced mixed noise. Sound can be
obtained. In addition, easy installation is possible by wiring and connector connection in the
vehicle.
[0106]
<< Voice Input Device >> FIG. 21 is a view showing the configuration of a voice input device
2100 according to the present embodiment. The integrated structure is not limited to FIG.
[0107]
The voice input device 2100 includes a sound insulation block 2101 and a first microphone
2102 and a second microphone 2103 integrated with the sound insulation block 2101. The
signals from the first microphone 2102 and the second microphone 2103 are wired in the sound
insulation block 2101, and are taken out by the wires 2104 and 2105 connected to the
connector 2106.
[0108]
[Ninth Embodiment] Next, a voice input device according to a ninth embodiment of the present
invention will be described. The audio input device according to this embodiment is different
from the second to eighth embodiments in that the noise suppression circuit is integrated with
the sound insulation block and outputs a noise-suppressed audio signal. The other configuration
and operation are the same as those of the second to eighth embodiments, and thus the detailed
description of the same configuration and operation will be omitted.
[0109]
According to the present embodiment, even if the on-vehicle apparatus does not have the noise
suppression circuit of the present embodiment, it is possible to obtain high-quality speech in
which mixed noise is reduced.
03-05-2019
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[0110]
<< Voice Input Device >> FIG. 22 is a view showing the configuration of a voice input device
2200 according to the present embodiment.
The structure incorporated with the audio suppression circuit is not limited to that shown in FIG.
[0111]
The voice input device 2200 includes a sound insulation block 2201 and a first microphone
2202 and a second microphone 2203 integrated with the sound insulation block 2201. The
signals from the first microphone 2202 and the second microphone 2203 are led to the noise
suppression circuit 2210 incorporated in the sound insulation block 2201 by the wiring 2204
and the wiring 2205. Then, in the noise suppression circuit 2210, noise is suppressed based on
the mixed signal from the first microphone 2202 and the noise signal from the second
microphone 2203 to generate an emphasized voice signal, and the connector 2206 is generated
from the wiring 2211 and the wiring 2222. Output through. The wiring 2223 is for power
supply.
[0112]
[Other Embodiments] Although the present invention has been described above with reference to
the embodiment, the present invention is not limited to the above embodiment. Various
modifications that can be understood by those skilled in the art can be made to the configuration
and details of the present invention within the scope of the present invention. Also included
within the scope of the present invention are systems or devices that combine the different
features included in each embodiment.
[0113]
Furthermore, the present invention may be applied to a system configured of a plurality of
03-05-2019
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devices or to a single device. Furthermore, the present invention is also applicable to the case
where an audio processing program for realizing the functions of the embodiments is supplied to
a system or apparatus directly or remotely. Therefore, in order to cause the computer to execute
the functions of the present invention, a voice processing program installed on the computer, a
medium storing the voice processing program, and a WWW (World Wide Web) server for
downloading the control program are also provided. , Are included in the category of the present
invention. In particular, at least a non-transitory computer readable medium is included within
the scope of the present invention.
[0114]
This application claims priority based on Japanese Patent Application No. 2013-025000, filed
Feb. 12, 2013, the entire disclosure of which is incorporated herein.
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