JP2001296889

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DESCRIPTION JP2001296889
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
voice input device which comprises a dialog device for using information media such as the
Internet and a recording device in a dialog with a user, together with a dialog generation device
for outputting information by voice.
[0002]
Nowadays, along with the generalization of voice-based operations of information terminals,
there is a demand for improvement of voice input characteristics and voice-based operability. For
example, in an interactive apparatus that uses information media such as the Internet and a
recording device in an interactive manner with the user, even if the user changes the position
with respect to the interactive apparatus, the voice input characteristics do not deteriorate, and
the user It is necessary to be able to interact with the lubrication while viewing the running state
of the interaction device sideways.
[0003]
For this reason, as a voice input device, it is necessary to match the direction of high sensitivity
of the microphone to the sound source, and the user can intuitively sense the input state of the
voice and the execution state of the interactive device even through the eyes Need to be
presented.
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[0004]
2. Description of the Related Art In a conventional voice input device, the positional relationship
between the user's mouth as a sound source and the microphone is maintained by using a
headset type microphone.
[0005]
However, the act of the user of the dialog device equipping a headset type microphone is not
acceptable in daily life, and the microphone of the headset type makes the microphone for the
user's mouth. The user's breath has to be input as noise because it must be placed at a close
distance.
[0006]
Also, in the conventional voice input device, in order to recognize whether the user's voice is
being input, it is necessary to stare and decode the display and the comment on the display, as in
the case of a car navigation system However, when there is a distance or an angle between the
user and the display, the user can not gaze at the display, and there is a problem that the
operability is not good.
[0007]
In view of such a point, the present invention prevents degradation of the voice input
characteristic even when the user changes the position with respect to the dialog device, and
presents the voice input level so that the user can intuitively It is an object of the present
invention to provide a voice input device capable of performing a lubricious interaction between
the two.
[0008]
SUMMARY OF THE INVENTION The present invention is a voice input device comprising a dialog
device for performing use of an information medium in the form of dialog with a user, together
with a dialog generation device for outputting information by voice, comprising two voice input
devices The voice input units are arranged symmetrically so as to face the same direction, and a
swing unit that horizontally turns so that the voice input levels to the two voice input units
become equal, and the voice input to the two voice input units It has a voice input state
presentation unit that presents a level.
[0009]
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According to the present invention, the two voice input units are disposed symmetrically in the
same direction so as to turn in the same direction, and provided with a turning unit that
horizontally turns so that the voice input levels to the two voice input units become equal.
Therefore, even if the user changes the position with respect to the interactive device, the two
voice input units can be directed toward the user.
[0010]
In addition, since the voice input state presentation unit is provided to present voice input levels
to the two voice input units, the user can intuitively determine whether or not his / her voice is
input. .
[0011]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 3 are a front view,
a right side view and a left side view schematically showing the appearance of an example of an
interactive device provided with a voice input device according to one embodiment of the present
invention. FIGS. 4, 5 and 6 are respectively a front view, a right side view and a left side view
schematically showing the structure of an example of the interactive device provided with the
voice input device according to the embodiment of the present invention.
[0012]
In FIG. 1 to FIG. 6, 1 is a voice input device according to an embodiment of the present invention,
and 2 is an output information by accessing an information medium such as the Internet or a
recording device according to contents instructed by voice input to the voice input device 1 Is a
dialog generation device that outputs the acquired output information by voice.
[0013]
The voice input device 1 and the dialogue generation device 2 are configured to be freely
coupled or separated, and the user mounts the voice input device 1 on the dialogue generation
device 2 and sets the voice input device 1 and the dialogue generation device 2 The voice input
device 1 and the dialogue generation device 2 can be used separately without mounting the
speech input device 1 in the dialogue generation device 2.
[0014]
In the voice input device 1, 3L and 3R are voice input units arranged symmetrically in the same
direction, 4L and 4R are microphones, 5L is for suppressing the propagation of sound to the
microphone 4R, and to the microphone 4L. The horn unit includes a cylindrical shield-shaped
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horn 6L capable of emphasizing the sound propagation of sound, 5R suppresses the propagation
of sound to the microphone 4L, and can enhance the sound transmission to the microphone 4R.
Of the horn 6R.
[0015]
Further, 7L is a horn support portion for supporting the horn portion 5L, 7R is a horn support
portion for supporting the horn portion 5R, and 8L is provided to the horn support portion 7L
for presenting a voice input level to the voice input portion 3L. A voice input state presentation
unit 8R is a voice input state presentation unit provided in the horn support unit 7R to present a
voice input level to the voice input unit 3R.
[0016]
The voice input state presentation unit 8L arranges the light emitting elements (for example,
LEDs) 9L from the vicinity of the microphone 4L to the vicinity of the execution state
presentation unit described later on the horn support unit 7L, as conceptually shown in FIG. The
light emitting element 9L is configured so that the user can visually sense the voice input level to
the voice input unit 3L visually even if the user is looking sideways, and according to the voice
input level to the voice input unit 3L, that is, When the audio input level is high, the light
emitting elements 9L are driven to blink sequentially from the upper side to the lower side as
indicated by an arrow AL in FIG. 1 so that more light emitting elements 9L blink.
[0017]
The voice input state presentation unit 8R is configured by arranging the light emitting elements
9R in the horn support 7R from the vicinity of the microphone 4R to the vicinity of the execution
state presentation unit described later, as conceptually shown in FIG. The light emitting element
9R allows the user to visually sense the voice input level to the voice input unit 3R visually even
if the user views it horizontally, and according to the voice input level to the voice input unit 3R,
that is, the voice input level If larger, the light emitting elements 9R are driven to blink
sequentially from the upper side to the lower side as indicated by an arrow AR in FIG. 1 so that
more light emitting elements 9R blink.
[0018]
Reference numeral 10 denotes a pivoting part fixed to the horn support parts 7L and 7R and
configured to horizontally turn so that the voice input levels to the voice input parts 3L and 3R
become equal, and 11 and 12 are disposed back and forth Universal wheels 13L and 13R are
drive wheels disposed on the left and right, 14L is a drive device for driving the drive wheel 13L,
14R is a drive device for driving the drive wheel 13R, 15 is a pivot for controlling the drive
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devices 14L and 14R It is a control unit.
[0019]
In the turning control unit 15, the drive wheels 13L and 13R are driven forward and reversely,
respectively, or the drive wheels 13L and 13R are driven reversely and forwardly, or both the
drive wheels 13L and 13R are braked. The drive devices 14L and 14R are controlled so that the
drive wheels 13L and 13R are both in the free state.
[0020]
Further, in the dialogue generation device 2, 16 is a base provided for mounting the speech input
device 1, and when the speech input device 1 is mounted on the dialogue generation device 2,
the speech input device 1 is free. It will be mounted on the base 16 of the interaction generation
device 2 via the wheels 11, 12 and the drive wheels 13L, 13R.
[0021]
Further, 17 is an interaction for accessing an information medium such as the Internet or a
recording device to obtain output information according to the content (command) instructed by
the voice input to the voice input device 1 and generating an audio signal from the obtained
output information The generation units 18L and 18R are speakers that output sound based on
the sound signal generated by the dialogue generation unit 17.
[0022]
Reference numeral 19 denotes an execution state presentation unit which presents that the
dialogue generation device 2 is executing the content (command) instructed by the voice input to
the voice input device 1, and the execution state presentation unit 19 is As shown in FIG. 5 and
FIG. 6, the light emitting element (for example, LED) 21 is arranged along the annular member
20 fixed to the turning portion 10, and the light emitting element 21 While running, it is driven
to flash sequentially in an annular direction so that the user can visually and intuitively, even as a
side-view, in particular as shown by arrow B in FIG.
[0023]
Reference numeral 22 denotes a connection cable for electrically connecting the voice input
device 1 and the execution state presentation unit 19 to the dialogue generation device 2.
Reference numeral 23 denotes an electricity connection for the dialogue generation device 2 to
the Internet or a recording medium. Connection cable.
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[0024]
FIG. 7 is a block diagram showing an example of the configuration of a dialog device provided
with the voice input device according to an embodiment of the present invention.
In FIG. 7, in the audio input unit 3L, 24L is an amplification circuit for amplifying the output
signal of the microphone 4L, and 25L is a band pass filter to which the output signal of the
amplification circuit 24L is input.
The band pass filter 25L sets the pass band to a voice band (for example, 200 Hz to 2 KHz), and
extracts only a range component from the output signal of the amplifier circuit 24L. It is for
reducing the sensitivity of low frequency sound such as wind and high frequency sound.
[0025]
Further, 26L is a rectifier circuit that rectifies the output signal of the band pass filter 25L and
outputs an absolute value voltage VL, and 27L drives the light emitting element 9L of the voice
input state presentation unit 8L based on the output signal of the band pass filter 25L. It is a
drive circuit.
The amplifier circuit 24L and the band pass filter 25L are built in the horn unit 5L as the circuit
unit 28L, and the rectifier circuit 26L and the drive circuit 27L are built in the horn support unit
7L as the circuit unit 29L.
[0026]
Further, in the voice input unit 3R, 24R is an amplification circuit for amplifying the output
signal of the microphone 4R, and 25R is a band pass filter to which the output signal of the
amplification circuit 24R is input.
The band pass filter 25R has the same characteristic as the band pass filter 25L.
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[0027]
A rectifying circuit 26R rectifies an output signal of the band pass filter 25R and outputs an
absolute value voltage VR. A driving circuit 27R drives the light emitting element 9R of the voice
input state presentation unit 8R based on the output signal of the band pass filter 25R. It is a
drive circuit.
The amplifier circuit 24R and the band pass filter 25R are built in the horn unit 5R as the circuit
unit 28R, and the rectifier circuit 26R and the drive circuit 27R are built in the horn support unit
7R as the circuit unit 29R.
[0028]
Further, in the swing control unit 15, a comparator 30 compares the absolute value voltage VL
with the reference voltage Vref, and turns on the output S30 when VL> Vref, and 31 indicates the
absolute value voltage VR and the reference voltage Vref. The comparator 32 turns on the output
S31 when VR> Vref, 32 compares the difference between the absolute value voltage VL and VR
(VL−VR) and the reference voltage Vref, and When VR)> Vref, a comparator that turns on its
output S32, 33 compares the difference between the absolute value voltages VR and VL
(VR−VL) with the reference voltage Vref, and (VR−VL)> Vref It is a comparator that turns on its
output S33.
[0029]
Also, 34 is a timer that turns on its output T34 for a fixed period when the output S30 of the
comparator 30 is turned on, and 35 turns its output T35 on for a fixed period when the output
S31 of the comparator 31 is turned on. The timer 36 turns on its output T36 for a fixed period
when the output S32 of the comparator 32 is turned on, and 37 turns on its output T37 for a
fixed period when the output S33 of the comparator 33 is turned on. A timer 38 is a
microcontroller that receives the outputs T34 to T37 of the timers 34 to 37 and controls the
driving devices 14L, 14R and the like according to a built-in program.
[0030]
Here, the length of the ON period of the outputs S30 to S33 of the comparators 30 to 33 can not
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read that the outputs S30 to S33 of the comparators 30 to 33 are turned ON from the
characteristics of the audio signal. It is usually the case that it becomes short enough.
Therefore, when the outputs S30 to S33 of the comparators 30 to 33 are directly input to the
microcontroller 38, the ON period is too large even when the outputs S30 to S33 of the
comparators 30 to 33 are turned ON. If it is short, the microcontroller 38 can not read this even
though the outputs S30 to S33 of the comparators 30 to 33 are turned ON, and a situation
occurs in which the drive wheels 13L and 13R can not be driven.
Therefore, timers 34 to 37 are provided to adjust the ON period of the outputs S30 to S33 of the
comparators 30 to 33.
[0031]
Although the illustration is omitted, the dialogue generation unit 17 receives voice output by the
output signals of the band pass filters 25L and 25R to recognize voice input and content
indicated by voice recognized by the voice recognition means (command Means for
communicating with an information medium such as the Internet or a recording device to obtain
output information corresponding to a), and a voice synthesizing means for synthesizing output
information acquired from the information medium such as the Internet or a recording device as
voice Also, a driving device for driving the light emitting element 21 of the execution state
presentation unit 19 is provided.
[0032]
FIG. 8 is a diagram showing an element action (a unit of action for transitioning a finite number
of states according to a condition) performed by the voice input device 1 and a suppression
relationship, and "S" indicates a suppression node.
In the voice input device 1, an element action [turning], an element action [braking], and other
element actions (for example, an action of periodically turning to attract the attention of a distant
user) are performed every control cycle. Although it is performed, the element action [turning]
has a first priority, and the element action [braking] has a second priority.
[0033]
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FIG. 9 is a state transition diagram of the element action [turning] performed by the voice input
device 1, and FIG. 10 is a state transition diagram of the element action [braking] performed by
the voice input device 1.
The element action [turning] includes left turn and right turn, and the left turn is an action to
turn the turning portion 10 to the left by reversing the left drive wheel 13L and rotating the right
drive wheel 13R forward, right The turning is an action of turning the turning portion 10 to the
right by rotating the left driving wheel 13L forward and the right driving wheel 13R in reverse.
FIG. 11 shows the voice input device 1 mounted on the dialogue generation device 2 turned 90
° to the left, and FIG. 12 shows the voice input device 1 mounted on the dialogue generation
device 2 turned 90 ° to the right There is.
Note that turning stop does not drive the drive wheels 13L and 13R, and does not brake the drive
wheels 13L and 13R, and puts the drive wheels 13L and 13R in a free state, so that the element
action [braking] And other element actions are not suppressed.
[0034]
In addition, there is only a braking action in the element action [braking], and the braking action
is an action of braking the driving wheels 13L and 13R.
The braking stop does not drive the drive wheels 13L and 13R, and does not apply a brake to the
drive wheels 13L and 13R, and puts the drive wheels 13L and 13R in a free state. It does not
suppress.
[0035]
Here, for example, when the output T36 of the timer 36 or the output T37 of the timer 37 is ON,
an element action [turning] appears, and the element action [braking] and other element actions
are suppressed.
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In this case, if the output T36 of the timer 36 is ON (VL-VR> Vref), that is, if the sound pressure
to the left microphone 4L is stronger than the sound pressure to the right microphone 4R, the
turning is performed. The unit 10 turns to the left, and if the output T37 of the timer 37 is ON
(VR-VL> Vref), that is, the sound pressure to the right microphone 4R is higher than the sound
pressure to the left microphone 4L. If it is stronger than a predetermined value, the turning unit
10 turns to the right.
[0036]
On the other hand, if the sound pressure difference to the left and right microphones 4L and 4R
is less than a predetermined value, the element action [braking] appears, and in this case, the
output T34 of the timer 34 is ON (VL> Vref) and the timer If the output T35 of 35 is ON (VR>
Vref), braking of the turning portion 10 is performed, and other element actions are suppressed.
[0037]
In the voice input device according to the embodiment of the present invention configured as
above, the voice emitted by the user is input to the voice input units 3L and 3R.
In this case, when the user is not in front of the voice input device 1, the sound pressures
received by the microphones 4L and 4R of the voice input units 3L and 3R are different, but the
voice input units 3L and 3R are the other voices. Since the horns 6L and 6R are provided to
suppress the sound propagation from the input unit side and emphasize the sound propagation
in the own direction, the sound pressure difference received by the microphones 4L and 4R of
the sound input units 3L and 3R is relatively emphasized Be done.
[0038]
Here, the voice of the user is voltage-converted by the microphones 4L and 4R and amplified by
the amplifier circuits 24L and 24R.
Then, the output signals of the amplifier circuits 24L and 24R are input to the band pass filters
25L and 25R, and only the voice component is extracted from the output signals of the amplifier
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circuits 24L and 24R.
[0039]
The output signals of the band pass filters 25L and 25R are supplied to drive circuits 27L and
27R for driving the light emitting elements 9L and 9R of the audio input state presentation units
8L and 8R, and according to the output signals of the band pass filters 25L and 25R. That is, the
light emitting elements 9L and 9R of the audio input state presentation units 8L and 8R are
blinked according to the level of the audio input level.
[0040]
Further, output signals of the band pass filters 25L and 25R are supplied to the dialogue
generation unit 17 of the dialogue generation device 2, and recognition of contents (commands)
instructed by speech by speech recognition means, information medium such as the Internet,
recording device and the like While securing the output information by the communication
means, converting the output information into voice signal by the voice synthesizing means, and
outputting the voice by the speaker, the light emitting elements of the execution state presenting
unit 19 are executed while the content (command) instructed by the voice is being executed. 21
blinks.
[0041]
Further, output signals of the band pass filters 25L and 25R are supplied to the rectifier circuits
26L and 26R, and absolute value voltages VL and VR formed by rectifying the output signals of
the band pass filters 25L and 25R from the rectifier circuits 26L and 26R are It is output.
The comparator 30 compares the absolute value voltage VL with the reference voltage Vref, the
comparator 31 compares the absolute value voltage VR with the reference voltage Vref, and the
comparator 32 compares the difference between the absolute value voltages VL and VR (VL -VR)
is compared with the reference voltage Vref, and the comparator 33 compares the difference
between the absolute value voltages VR and VL (VR-VL) with the reference voltage Vref.
[0042]
Then, the outputs S30 to S33 of the comparators 30 to 33 are supplied to the timers 34 to 37,
and the timers 34 to 37 generate the outputs T34 to T37 in which the ON periods of the outputs
S30 to S33 of the comparators 30 to 33 are adjusted. It is supplied to the controller 38, and the
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micro controller 38 controls the driving devices 14L and 14R, and the turning to the direction in
which the sound pressure difference to the left and right microphones 4L and 4R decreases is
repeated. It is controlled to turn in the direction of
[0043]
Thus, according to the voice input device 1 of the embodiment of the present invention, the voice
input units 3L and 3R suppress the voice propagation from the other voice input unit side and
emphasize the voice propagation in the own direction. Since the horns 6L and 6R are provided,
the sound pressure difference to the microphones 4L and 4R of the voice input units 3L and 3R
can be relatively emphasized, and the turning can be sensitive to the movement of the user.
Therefore, even if the user changes the position with respect to the dialog device, the voice input
units 3L and 3R can be directed toward the user, and the voice input characteristics can be
prevented from being degraded.
[0044]
In addition, the light emitting element 9L is provided with voice input state presentation units 8L
and 8R so that the user can visually sense that the user's voice is being input to the voice input
units 3L and 3R through visual observation 9R is used to present that speech input is being
transmitted to the dialogue generation device 2, so that the user can perform a pleasant dialogue
with the dialogue device.
[0045]
In addition, since the execution state presentation unit 19 is provided so that the user can
visually sense that the dialogue generation device 2 is executing a voice command so that the
user can feel even if he is looking sideways, from this point of view as well. Can interact with the
interaction device.
[0046]
Further, since the voice input device 1 and the dialogue generation device 2 are configured to be
freely coupled or separated, the voice input device 1 is mounted on the dialogue generation
device 2 at the convenience of the user (restriction of the size of the generated sound, etc.) The
voice input device 1 can be used without being installed in the dialog generation device 2, and
high convenience can be obtained.
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[0047]
In addition, the voice input units 3L and 3R have a voice band (for example, 200 Hz to 2 Kz) as a
pass band, and reduce the sensitivity of low-frequency sound or high-frequency sound such as air
turbulence or wind when the voice input device 1 turns. Since the band pass filters 25L and 25R
of the above are provided so that the voice component emitted by the user can be extracted
favorably, the voice component generated by the user by the voice input condition presentation
by the voice input condition presentation units 8L and 8R And the speech recognition in the
dialogue generation device 2 can be performed with high accuracy.
[0048]
Further, when the difference (VL-VR) between the absolute value voltages VL and VR is equal to
or higher than the reference voltage Vref, the turning control unit 15 turns left, and the
difference (VR-VL) between the absolute value voltages VR and VL becomes the reference voltage
Vref. In the above case, the element action [turning] and the element action [braking] for braking
when both of the absolute value voltages VL and VR are equal to or higher than the reference
voltage Vref (1) The element action [braking] is expressed under the second priority, so that even
if the user moves around, it is preferable to follow the turning of the voice input units 3L and 3R
well. it can.
[0049]
Here, when the voice input device of the present invention is organized, the voice input device of
the present invention includes at least the following voice input device.
[0050]
[1] A voice input device that configures a dialog device that uses information media in a dialog
style with a user together with a dialog generation device that outputs information by voice, so
that two voice input units face in the same direction And a voice input state presentation that
presents voice input levels to the two voice input units, and a swing unit that is horizontally
arranged symmetrically and turns horizontally so that voice input levels to the two voice input
units become equal. A voice input device comprising:
[0051]
[2] The voice input device according to [1], further including an execution state presentation unit
that presents an execution state of the dialogue generation device.
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[0052]
[3] In the voice input device according to [1] or [2], it can be used by being installed in the
dialogue generation device or can be used without being installed in the dialogue generation
device. A voice input device characterized by
[0053]
[4] In the voice input device according to [2] or [3], the voice input state display unit arranges a
plurality of light emitting elements from the vicinity of the microphone to the vicinity of the
execution state presentation unit, A voice input device driven so as to sequentially blink from a
light emitting element near the microphone to a light emitting element near the execution state
presentation unit according to an output signal voltage of the band pass filter.
[0054]
[5] In the voice input device according to the above [4], the execution state presentation unit
arranges the plurality of light emitting elements in a ring shape, and a part of the light emission
elements is close to the end of the voice input state presentation unit. An audio input device,
wherein the plurality of light emitting elements are driven to blink sequentially in an annular
direction when a command of the dialog generation device is executed.
[0055]
[6] In the voice input device according to [1], [2], [3], [4] or [5], the voice input unit suppresses
voice propagation from the other voice input unit side. A voice input device, comprising: a horn
surrounding the microphone to emphasize the voice propagation in its own direction.
[0056]
[7] In the voice input device according to the above [6], the voice input unit includes an amplifier
circuit for amplifying an output signal of the microphone, and a band having a voice band as a
pass band and the output signal of the amplifier circuit being input. What is claimed is: 1. A voice
input device comprising: a pass filter; and a rectifying circuit that rectifies an output signal of the
band pass filter and outputs an absolute value voltage.
[0057]
[8] In the voice input device according to the above [1], the swing unit is configured such that a
swing mechanism including independent drive wheels on the left and right sides and the voice
input level to the two voice input units is equal. A voice input device characterized by comprising
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a turning control unit for controlling a mechanism.
[0058]
[9] In the voice input device described in [8], the absolute value voltage output from the rectifier
circuit of the left voice input unit is VL, and the absolute value voltage output from the rectifier
circuit of the right voice input unit is VR. If the difference between the absolute value voltages VL
and VR (VL-VR) is equal to or higher than the reference voltage, the turning control unit turns
left, and the difference (VR-VL) between the absolute value voltages VR and VL is the reference
Elemental action [turning] that turns to the right when the voltage is higher, and element action
[braking] that performs braking when both of the absolute value voltages VL and VR are higher
than the reference voltage A voice input device characterized by causing the element action
[braking] to appear under a second priority.
[0059]
[10] In the voice input device according to [9], the swing control unit compares an absolute value
voltage VL with the reference voltage, and turns on an output when the absolute value voltage
VL is equal to or higher than the reference voltage. A first comparator for comparing the
absolute value voltage VR with the reference voltage, and the second comparator for turning on
the output when the absolute value voltage VR is higher than the reference voltage, and the
absolute value voltage A third comparison in which the difference between VL and VR (VL-VR) is
compared with the reference voltage, and when the difference between the absolute value
voltages VL and VR (VL-VR) is greater than the reference voltage, the output is turned ON And
the difference between the absolute value voltages VR and VL (VR-VL) and the reference voltage,
and when the difference between the absolute value voltages VR and VL (VR-VL) is greater than
the reference voltage, the output is turned on. When the output of the fourth comparator and the
first comparator are turned on, When the first timer that turns on the output, the second timer
that turns on the output for a fixed period when the output of the second comparator turns on,
and the output when the third comparator turns on A third timer for turning on the output for a
fixed period, and a fourth timer for turning on the output for a fixed period when the output of
the fourth comparator is turned on, and the first, second, and fourth timers. 3. A voice input
device comprising a microcontroller for controlling the turning mechanism by receiving an
output of a fourth timer.
[0060]
As described above, according to the present invention, two voice input units are arranged
symmetrically so as to face the same direction, and the voice input levels to the two voice input
units become equal. (2), so that even if the user changes the position with respect to the dialog
device, the two voice input units can be directed toward the user and the voice input
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characteristics are not deteriorated. And a voice input state presentation unit that presents voice
input levels to the two voice input units, so that the user can intuitively see through their eyes
whether or not their voice is being input. It can be determined and can interact with the dialogue
device.
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