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JP2016063439

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DESCRIPTION JP2016063439
Abstract: The present invention provides an in-room conversation device in which conversation
in a vehicle room can be smoothly performed. SOLUTION: A microphone 20 is provided in a
vehicle compartment VR to collect voice and to detect a first position where a speaker of the
collected voice is present, and a speaker 30 to output the collected voice. And a control device 10
for calculating the second position separated from the first position by a predetermined distance
or more and causing the speaker 30 provided at the position according to the second position to
output the collected sound . [Selected figure] Figure 1
In-room conversation device
[0001]
BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to an inroom conversation apparatus that supports conversation of a vehicle occupant.
[0002]
The voice input to the rear seat microphone is output to the front seat speaker 8 and the voice
input to the front seat hands-free microphone to enable conversation between the front seat
passenger and the rear seat passenger in the vehicle compartment However, a technique is
known that is output to the rear seat speaker (Patent Document 1).
[0003]
JP 2003-125068 A
03-05-2019
1
[0004]
However, since the technology described in Patent Document 1 requires microphones for all the
seats provided in the vehicle, the number of microphones installed increases, resulting in a
problem of high cost. .
[0005]
The problem to be solved by the present invention is to make the conversation between the
occupants in the vehicle interior of the vehicle smoothly proceed using an inexpensive apparatus.
[0006]
According to the present invention, a speaker provided at a position corresponding to a first
position and a second position equal to or more than a predetermined distance with respect to a
predetermined reference position is detected with respect to the predetermined reference
position. The above problem is solved by selecting and outputting the collected sound to the
selected speaker.
[0007]
According to the present invention, conversations between vehicle occupants can be smoothly
performed using an inexpensive apparatus.
[0008]
It is a block block diagram of the in-room conversation device of this embodiment concerning the
present invention.
It is a flowchart which shows the control procedure of the vehicle interior conversation
apparatus of this embodiment which concerns on this invention.
[0009]
Hereinafter, embodiments of the present invention will be described based on the drawings.
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2
FIG. 1 is a block diagram of an in-room conversation device 100 according to the present
embodiment.
In the present embodiment, the case where the in-room conversation device according to the
present invention is applied to a device mounted on a vehicle will be described as an example.
[0010]
As shown in FIG. 1, the in-room conversation apparatus 100 of the present embodiment includes
a control device 10, a microphone 20, and one or more speakers 30.
[0011]
The microphone 20 according to the present embodiment is provided on the inner wall (ceiling)
of the vehicle room VR of the vehicle V, and collects a voice in the vehicle compartment and
detects a first position where the speaker of the collected voice is present. .
The first position is the position of the sound source of the uttered voice.
Information for specifying the position and direction of the detected first position is sent to the
control device 10 described later.
The microphone 20 of this embodiment has directivity, and detects the position and direction of
the sound source of the collected sound.
The method of detecting the position and direction of the sound source is not particularly limited,
and the method known at the time of filing can be applied as appropriate.
Although not particularly limited, the microphone 20 of the present embodiment is an array
microphone provided with a plurality of microphones. The microphone 20 according to the
present embodiment detects the position and direction of the sound source using phase
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differences of sounds generated from a plurality of sound sources at different positions.
[0012]
The speaker 30 of the present embodiment outputs sound in accordance with an instruction of
the control device 10. One or more speakers 30 of the present embodiment are provided on the
inner wall of the vehicle compartment VR of the vehicle V. Although not particularly limited, as
shown in FIG. 1, the speaker 30 of the present embodiment includes a speaker 30FR provided on
the door side of the driver's seat in the vehicle room VR, and a speaker 30FL provided on the
door side of the passenger seat. At least one speaker 30 is included among the speakers 30RR
and 30RR provided on the door side of the rearmost seat and the speaker 30R provided on the
back door side. Hereinafter, these may be collectively referred to as a speaker 30. The number of
speakers 30 provided is not particularly limited.
[0013]
The control device 10 of this embodiment executes a program stored in a ROM (Read Only
Memory) storing a program for controlling input / output of voice in the vehicle compartment
and a program stored in the ROM, thereby providing a vehicle interior conversation device A
central processing unit (CPU) as an operation circuit to be functioned, and a random access
memory (RAM) functioning as an accessible storage device are provided.
[0014]
The control device 10 of the in-room conversation apparatus 100 according to the present
embodiment realizes a calculation function, a selection function, and an output control function.
The in-room conversation apparatus 100 according to the present embodiment is a computer
that realizes each function by cooperation of software for realizing the above-described function
and the above-described hardware.
[0015]
Hereinafter, each function realized by the control device 10 of the in-room conversation device
100 will be described.
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[0016]
First, the calculation function of the present embodiment will be described.
The control device 10 of the in-room conversation apparatus 100 of the present embodiment
calculates a second position separated from the first position detected by the microphone 20 by
a predetermined distance or more. This is because the conversation in the vehicle compartment
is difficult to be smoothly performed as the distance between the speaker and the listener gets
farther.
[0017]
For example, as shown in FIG. 1, when the point DV corresponding to the head (speaking
position) of the driver is detected as the first position, the points PS1 and PS2 separated from the
point DV by a predetermined distance or more are Calculated as 2 positions. In the present
example, the predetermined distance is preferably set to be longer than the distance from point
DV, which is the first position, to point PS3 corresponding to the position of the passenger seated
in the front passenger seat. Between the driver sitting next to each other and the passenger on
the front passenger seat, an event such as the inability to hear a speech hardly occurs. If the
predetermined distance is shorter than the distance from the point DV to the point PS3, the
speaker 30FL on the door side of the front passenger seat may be activated.
[0018]
Further, the predetermined distance is preferably set to be equal to or less than the distance from
the point DV which is the first position to the points PS1 and PS2 corresponding to the position
of the occupant seated in the rear seat. It is most likely that the driver's voice will be difficult to
hear when the driver's seat and points PS1 and PS2 are at a distance. If the predetermined
distance is longer than the distance from the point DV to the points PS1 and PS2, the rear seat
speakers 30RR and 30RL may not operate. In addition, it may be difficult for the driver's voice to
be heard at the points PS4 and PS5 due to the influence of the seat structure and the installation
in the vehicle compartment. In this case, if the predetermined distance is longer than the distance
from the point DV to the points PS4 and PS5, the speakers 30RR and 30RL in the rear seat may
not operate. In this embodiment, a predetermined distance is defined by experimentally obtaining
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a distance at which it is difficult for the voices of other occupants, including the driver, to hear
depending on the vehicle type, the size of the vehicle, the structure of the vehicle interior, and
the like.
[0019]
When points PS1 and PS2 corresponding to the head (speaking position) of the occupant in the
rear seat are detected as the first position, and the predetermined reference position is point P, a
predetermined distance or more from point PS1 or point PS2 The separated points DV and PS3
are calculated as the second position. In this example, the predetermined distance is set to be
longer than the distance between the point PS1 which is the first position and the point PS2. The
predetermined distance is set to be equal to or less than the distance from point PS1 or point PS2
as the first position to point DV corresponding to the head of the driver (or point PS3
corresponding to the position of the occupant seated in the front passenger seat). .
[0020]
Since the occupant usually speaks in the traveling direction, it is difficult for the occupant
present on the opposite side (symmetrical position) to the speaker in the vehicle interior to hear
the speech sound. The control device 10 of the present embodiment calculates, as the second
position, a position symmetrical to the first position with respect to a predetermined reference
position set in advance. The predetermined reference position in the present embodiment is a
point P substantially at the center of the vehicle interior. The predetermined reference position in
the present embodiment may be the position where the microphone 20 is provided. The
reference position may be a point or a line. When the reference position is a point, the second
position is a point symmetrical position with respect to the first position with respect to the
reference position (point). When the reference position is a line, the second position is a line
target position relative to the first position (line). In the present embodiment, the predetermined
reference position may be a position where the microphone 20 is provided, or a line passing
through the position of the microphone 20.
[0021]
For example, as shown in FIG. 1, when the point DV corresponding to the head (speaking
position) of the driver is detected as the first position and the predetermined reference position is
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the point P, the first position A point PS2 symmetrical with the position is calculated as a second
position. Also, when the point DV corresponding to the driver's head (speaking position) is
detected as the first position and the predetermined reference position is the line (symmetrical
axis) PY passing through the point P, with respect to the line PY A point PS1 that is linesymmetrical to the first position may be calculated as the second position.
[0022]
Subsequently, the selection function of the control device 10 of the present embodiment will be
described. The control device 10 of the in-room conversation apparatus 100 of the present
embodiment selects the speaker 30 provided at the position corresponding to the second
position among the plurality of speakers 30 provided in the vehicle room VR. The control device
10 stores the position of each speaker 30 in advance. The control device 10 selects the speaker
30 having the shortest distance from the second position. The control device 10 may select the
speaker 30 whose distance from the second position is equal to or less than a predetermined
distance.
[0023]
Finally, the output control function of the present embodiment will be described. The control
device 10 of the in-room conversation apparatus 100 of the present embodiment causes the
collected sound to be output to the selected speaker 30. One or more speakers may be selected.
[0024]
As described above, the in-room conversation apparatus 100 according to the present
embodiment operates the speaker 30 near the second position separated from the first position
by a predetermined distance or more, or the second position symmetrical with the first position
with respect to the reference position. The speaker 30 near the position is operated. Since the
volume of the collected sound can be maintained and output, it can be prevented that the speech
sound is difficult to hear due to the positional relationship. As a result, even if the user can not
hear the uttered voice and the listener does not listen back or get on in front, conversation can be
smoothly performed in the vehicle interior. In addition, even if the uttered voice does not reach
and the utterer makes a loud re-speaking or does not look back to the side or back, he can talk
smoothly in the vehicle interior.
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[0025]
In a vehicle whose vehicle length is long and the vehicle room VR is wide along the traveling
direction, the distance from the driver's seat to the rear seat is long. For this reason, it is difficult
for the occupant seated in the rear seat to hear the driver's speech. In particular, since the driver
usually speaks forward, the voice is difficult for the occupant seated in the rear seat to hear.
Similarly, the driver has difficulty hearing the speech of the rear seat occupants. In particular, if
there is a backrest of another seat between the rear seat and the driver's seat (see FIG. 1) or if a
partition plate is present, the driver's voice of the rear seat is less audible to the driver. The inroom conversation apparatus 100 of the present embodiment calculates a second position
separated from the first position by a predetermined distance or more, and outputs a sound with
the first position as a sound source from the speaker 30 at a position corresponding to the
second position. Thus, the collected sound is output through the speaker 30 at a position where
the distance is long and the sound is difficult to hear. Thereby, even if the occupants are seated at
separated positions, it is possible to clearly hear each other's speech.
[0026]
In a vehicle whose vehicle width is wide and the vehicle compartment VR is wide along the
vehicle width direction, the distance from the driver's seat to the diagonal seat (rear seat
passenger side seat) is long. In addition, since the backrest of the driver's seat exists between the
rear seat behind the driver's seat and the driver's seat, the driver can not easily hear the voice of
the occupant of the rear seat behind the driver's seat. Therefore, it is difficult for the occupants in
the rear seat to hear the driver's speech, and the driver is unlikely to hear the occupant in the
rear seat. The in-room conversation apparatus 100 of the present embodiment calculates a
second position symmetrical to the first position with respect to a predetermined reference
position, and uses the first position as a sound source from the speaker 30 at a position
corresponding to the second position. Output voice. As described above, when the voice is
difficult to hear due to the positional relationship, such as the driver and the passengers sitting
on the diagonal of the vehicle compartment or the drivers and the passengers sitting on the rear
seat behind the driver's seat, Output the collected sound through 30. This makes it possible to
clearly hear each other's uttered voice, even if there is a positional relationship in which the voice
is difficult to hear. As a result, conversation in the vehicle interior VR is smoothly performed.
[0027]
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In this case, by setting the reference position substantially at the center of the vehicle room VR, it
is possible to smoothly communicate with the occupant in the entire vehicle room VR according
to the size of the vehicle room VR.
[0028]
Next, a control procedure of the in-room conversation apparatus 100 of the present embodiment
will be described based on the flowchart shown in FIG.
[0029]
First, in step S1, the microphone 20 of the in-room conversation device 100 acquires the sound
in the in-vehicle room.
In step S2, the microphone 20 according to the present embodiment detects a first position
where the speaker of the collected sound is present.
The position information and the direction information of the detected first position are sent to
the control device 10.
[0030]
In step S3, the control device 10 included in the in-room conversation apparatus 100 of the
present embodiment calculates the second position based on the first position. The control device
10 obtains a second position separated from the first position by a predetermined distance or
more. The control device 10 obtains a second position which is a position symmetrical to the first
position with respect to a predetermined reference position.
[0031]
In step S4, the control device 10 reads the position in the vehicle compartment VR of one or
more speakers 30 disposed in the vehicle compartment VR, and selects the speaker 30 closest to
the second position.
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[0032]
In step S5, the control device 10 outputs the collected sound to the selected speaker 30.
[0033]
According to the in-room conversation apparatus 100 of the present embodiment configured and
operating as described above, the following effects can be obtained.
[0034]
[1] The in-room conversation apparatus 100 of this embodiment outputs the sound collected
from the speaker 30 at the position corresponding to the second position separated by a
predetermined distance or more from the first position which is the sound source of the uttered
voice.
As a result, an occupant at a position where the distance is long and audio can not easily be
heard can be made to listen to the audio collected through the speaker 30.
As a result, even if the occupants sit at separated positions, they can clearly hear each other's
speech, and can communicate smoothly with an inexpensive device.
[0035]
[2] The in-room conversation apparatus 100 of this embodiment outputs the sound collected
from the speaker 30 at a position corresponding to the second position, which is a position
symmetrical to the first position that is the sound source of the uttered voice.
Thus, an occupant at a position where it is difficult to hear the opposite voice in the vehicle
compartment can listen to the voice collected through the speaker 30. As a result, even if the
occupants sit at positions where it is difficult to hear voices, they can clearly hear each other's
voices, and can talk smoothly with an inexpensive device.
[0036]
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[3] According to the in-room conversation apparatus 100 of the present embodiment, outputting
the sound collected at a place suitable for the size and shape of the vehicle compartment VR by
setting the reference position to the approximate center of the vehicle room VR Can. As a result,
the voices of the passengers can be easily heard from each other in the entire vehicle room VR.
As a result, conversation in the vehicle compartment can be smoothly performed by an
inexpensive device.
[0037]
In addition, all the embodiments described above are described to facilitate understanding of the
present invention, and are not described to limit the present invention. Therefore, each element
disclosed in the above embodiment is intended to include all design changes and equivalents that
fall within the technical scope of the present invention.
[0038]
In the present specification, the indoor conversation device 100 mounted on a vehicle will be
described as an example of the indoor conversation device according to the present invention,
but the present invention is not limited to this.
[0039]
In this specification, the microphone 20, the speaker 30, and the calculation function as one
mode of the in-vehicle conversation device including the array microphone, the speaker, the
calculation unit, the selection unit, and the output control unit according to the present invention.
Although it demonstrates taking the case of the vehicle interior conversation apparatus 100
provided with and the control apparatus 10 which performs a selection function and an output
control function, it is not limited to this.
[0040]
DESCRIPTION OF SYMBOLS 100 ... Car interior conversation apparatus 10 ... Control apparatus
11 ... CPU12 ... ROM13 ... RAM20 ... Microphone 30, 30FR, 30FL, 30RR, 30RL, 30R ... Speaker
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