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DESCRIPTION JP2018125822

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DESCRIPTION JP2018125822
Abstract: An in-vehicle conversation support device capable of improving difficulty in listening to
utterance content generated according to an utterance volume. The in-vehicle conversation
support device 1 includes a microphone 10 for collecting voices of passengers in a front row, a
microphone 30 for collecting voices of passengers in a rear row, and boarding of the voices
collected by the microphones 10 in the rear rows. Audio processor 12 and amplifier 14 output
from the speaker 36 toward the disabled person, audio processor 32 outputting the audio
collected by the microphone 30 toward the passenger in the front row from the speaker 16,
amplifier 34 and boarding in the front row Voice output stop judging unit 18 for stopping the
output of voice directed to the passenger in the rear row from the speaker 36 when the voice of
the speaker reaches the passenger in the rear row, and the passenger voice of the passenger in
the rear row boarding the front row And a voice output stop judging unit 38 for stopping the
output of the voice directed from the speaker 16 to the passenger in the front row when the user
has reached the person. [Selected figure] Figure 1
In-car conversation support device
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
in-vehicle conversation support device which is mounted on a vehicle, collects voice of a
passenger's speech with a microphone and outputs the sound from a speaker.
[0002]
Conventionally, in the car while traveling, each person's voice of the driver's seat or the
passenger's seat is collected by the microphone, and the voice of the passenger of the rear seat is
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collected by the microphone and output from the speaker. There is known a car interior
conversation assistance device that makes it easy for other passengers to hear the contents of the
passengers' utterances (see, for example, Patent Document 1).
[0003]
An in-vehicle conversation support device has also been known which performs speech
recognition processing on the voice of the passenger and displays the content of the speech on a
display as text (for example, see Patent Document 2).
[0004]
JP, 2010-83452, A JP, 2014-170154, A
[0005]
By the way, in the in-vehicle conversation assistance device disclosed in Patent Document 1
described above, when the volume of the passenger who speaks is large, the output sound
obtained by outputting the speech voice from the speaker overlaps the speech voice itself, and
the other passengers There was a problem that it was difficult to hear the contents of the
utterance.
For example, when the volume of the speech of the passenger in the rear seat is large, the voice
of the speech directly reaches the passenger in the driver's seat or the passenger's seat, and the
same content is outputted from the speaker after a delay caused by the voice processing etc. As a
result, the passengers in the driver's seat and the passenger's seat are reached, which makes the
situation inconvenient for a passenger trying to understand the contents of these sounds.
[0006]
Note that, as in the case of the in-vehicle conversation support device disclosed in Patent
Document 2 described above, when the utterance content is displayed as text, the arrival timing
is not mutually shifted and the voice does not reach, but other passengers It is necessary to read
the displayed text to understand the contents uttered at a small volume that can not be
understood directly, so the burden on the conversation increases and the sense of reality of the
conversation is lacking, so it is practical I can not say.
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[0007]
The present invention has been made in view of such a point, and an object thereof is to provide
an in-vehicle conversation support device capable of improving the difficulty in listening to the
utterance content generated according to the utterance volume. .
[0008]
In order to solve the problems described above, the in-vehicle conversation support device of the
present invention includes a first microphone that collects voices of passengers in a front row,
and a second microphone that collects voices of passengers in a rear row, First voice output
means for directing the voice collected by the first microphone to the passenger in the rear row
and outputting from the speaker, and outputting the voice collected by the second microphone to
the passenger in the front row from the speaker The second voice output means, and the first
voice for stopping the output of voice directed to the rear row passenger by the first voice output
means when the voice of the passenger in the front row reaches the rear row passenger Output
stopping means and second voice output stopping means for stopping output of voice directed to
the front row passenger by the second voice output means when speech voice of the rear row
passenger reaches the front row passenger And have.
[0009]
When the speech voice of the passenger in the rear row directly reaches the passenger in the
front row, or when the speech voice of the passenger in the front row directly reaches the
passenger in the rear row, the voice output using the speaker is stopped. Therefore, it is possible
to prevent the speech of the same utterance content from reaching at the shifted timing, and it
becomes possible to improve the difficulty in listening that occurs when the speech volume is
large.
[0010]
In addition, when the presence or absence of arrival of the voice of the passenger in the front
row to the rear row of the passenger in the front row is repeatedly switched, the content of the
voice of the voice of the passenger in the front row collected by the first microphone is analyzed
When the first voice recognition processing means for displaying to the passenger and the
presence or absence of arrival of the voice of the passenger in the rear row to the front row of
the passenger in the rear row are repeatedly switched, the second microphone picks up the
sound in the rear row It is desirable to further comprise a second voice recognition processing
means for analyzing the contents of the person's uttered voice and displaying it toward the
passenger in the front row.
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As a result, although the speech voice of the passenger in the rear row directly reaches the
passenger in the front row, the volume is insufficient and the content can only be partially heard,
or the voice of the passenger in the front row is If you reach the passenger in the back row
directly, but the volume is insufficient and you can only partially hear the content, you can check
the content of the spoken voice on the display, which makes it difficult to hear due to lack of
volume It is possible to complement
[0011]
Further, the first voice output stopping means described above is a first voice when the analysis
result of the voice of the passenger in the front row is displayed toward the passenger in the rear
row by the first voice recognition processing means. The second voice output stopping means
stops the output of the voice directed to the passenger in the rear row by the output means, the
second voice recognition processing means causes the passenger in the front row to analyze the
speech of the voice of the passenger in the rear row. It is desirable to stop the output of the voice
directed to the front row passenger by the second voice output means when being directed and
displayed.
As a result, although the speech voice of the passenger in the rear row directly reaches the
passenger in the front row, the volume is insufficient and the content can only be partially heard,
or the voice of the passenger in the front row is It is an offensive sound that is fragmented by
preventing the voice from being output from the speaker when it reaches the passenger in the
rear row directly but the volume is insufficient and the content can only be partially heard. It is
possible to avoid duplication of
[0012]
Further, the first voice output stopping means described above determines whether the voice of
the passenger in the front row has reached the passenger in the rear row based on the voice
signal output from the second microphone. Preferably, the second voice output stopping means
determines whether the voice of the passenger in the rear row has reached the passenger in the
front row based on the voice signal output from the first microphone.
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The second microphone that collects the voices of the passengers in the rear row detects the
voices of the passengers in the front row, and the first microphone that collects the voices of the
passengers in the front row uses the second microphones By detecting the voice, it is not
necessary to separately prepare a configuration for voice detection, so that the cost can be
reduced by reducing the number of parts.
[0013]
In addition, the third microphone for collecting the voices of the passengers in the rear row
described above near the listening position of the passengers in the front row, and the fourth
voice for collecting the voices of the passengers in the front row near the listening positions of
the passengers in the rear row The first voice output stopping means determines whether the
voice of the passenger in the front row has reached the passenger in the rear row based on the
voice signal output from the fourth microphone. Preferably, the second voice output stopping
means determines, based on the voice signal output from the third microphone, whether the
voice of the passenger in the rear row has reached the passenger in the front row.
This makes it possible to more accurately determine whether or not the voices of the other
passengers directly reach each passenger, and to appropriately switch the presence or absence of
the voice output from the speaker to improve the difficulty of hearing. It becomes possible.
[0014]
It is a figure showing the composition of the in-vehicle conversation support device of a 1st
embodiment.
It is a figure which shows the relationship between the sound volume of the passenger | crew's
speech detected by the microphone, and the presence or absence of the audio | voice output
from a speaker.
It is a figure which shows the structure of the in-vehicle conversation assistance apparatus of
2nd Embodiment.
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It is a figure which shows the relationship between the sound volume of the passenger | crew's
speech detected by the microphone, the presence or absence of the audio | voice output from a
speaker, and the presence or absence of the audio | voice content display by a display part. It is a
figure of the modification showing the relation between the volume of the voice of the
passenger's voice detected by the microphone, the presence or absence of the voice outputted
from the speaker, and the presence or absence of the voice content display by the display unit. It
is a figure which shows the structure of the modification of the in-vehicle speech assistance
apparatus which added the microphone for audio | voice detection. It is a figure which shows the
structure of the other modification of the in-vehicle speech assistance apparatus which added the
microphone for audio | voice detection.
[0015]
An in-vehicle conversation support apparatus according to an embodiment to which the present
invention is applied will be described below with reference to the drawings.
[0016]
First Embodiment FIG. 1 is a diagram showing a configuration of an in-vehicle conversation
support device of a first embodiment.
The in-vehicle conversation support device 1 shown in FIG. 1 includes microphones 10 and 30,
voice processing units 12 and 32, amplifiers 14 and 34, speakers 16 and 36, and voice output
stop determination units 18 and 38. The in-vehicle conversation support device is mounted on a
vehicle.
[0017]
The microphone 10 collects the voice of the passenger in the front row of the host vehicle. The
microphone 10 is attached to a position where the voice of the driver and the passenger of the
front passenger seat can be collected, for example, a dashboard or a ceiling at the upper center of
the front seat.
[0018]
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The microphone 30 collects the voice of the passenger in the rear row of the host vehicle. The
microphone 30 is attached to a position at which the voice of the passenger in the rear row can
be collected, for example, a headrest at the driver's seat or a front passenger seat, a ceiling at the
upper center of the rear row, or the like.
[0019]
The voice processing unit 12 removes components irrelevant to the collected voice, such as wind
noise and road noise, and enhances the frequency component of the voice band, for the voice
collected by the front row microphone 10. Do the processing. The audio after these processing
ends is amplified by the amplifier 14 and output from the rear row speaker 36. The speaker 36 is
mounted at a position suitable for listening to a rear row passenger, for example, to the left and
right of the rear row seat.
[0020]
The voice processing unit 32 removes components unrelated to the collected voice, such as wind
noise and road noise, and enhances the frequency component of the voice band, for the voice
collected by the microphones 30 for the rear row. Do the processing. The audio after these
processing ends is amplified by the amplifier 34 and output from the front row speaker 16. The
speakers 16 are mounted at positions suitable for the passengers in the front row, for example, at
the left and right of the driver's seat and the front passenger's seat.
[0021]
The voice output stop determination unit 18 stops the output of the voice directed to the rear
row passenger by the voice processing unit 12, the amplifier 14, and the speaker 36 when the
speech voice of the front row passenger reaches the rear row passenger. . Specifically, based on
the audio signal output from the microphone 30, the voice output cancellation determination unit
18 determines whether the voice of the passenger in the front row has reached the passenger in
the rear row. The voice of the passenger in the front row is also clearly collected by the front row
microphone 10, and can be separated from ambient noise such as road noise. In addition, when
the volume of the speech of the passenger in the front row is large, the sound should be collected
by the microphone 30 for the rear row at approximately the same time. Therefore, by monitoring
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the presence or absence of the uttered voice collected by the rear row microphone 30 at the
timing when the sound is collected by the front row microphone 10 (a slight delay is caused by
passing through the voice processing unit 12 etc.) It is possible to determine whether the speech
voice of the passenger in the front row is collected by the microphone 30 for the rear row, that
is, whether the speech voice of the passenger in the front row has reached the passenger in the
rear row .
[0022]
The voice output stop determination unit 38 stops the output of the voice directed to the
passenger in the front row by the voice processing unit 32, the amplifier 34, and the speaker 16
when the voice of the passenger in the rear row reaches the passenger in the front row. .
Specifically, based on the audio signal output from the microphone 10, the voice output stop
determination unit 38 determines whether the voice of the passenger in the rear row has reached
the passenger in the front row. Speech voices of the passengers in the rear row are also clearly
collected by the microphones 30 for the rear row and can be separated from ambient noise such
as road noise. In addition, when the volume of the speech of the passenger in the rear row is
high, the sound should be collected by the microphone 10 for the front row at about the same
time. Therefore, by monitoring the presence or absence of the uttered voice collected by the front
row microphone 10 at the timing at which the sound is collected by the rear row microphone 30
(a slight delay is caused by passing through the voice processing unit 32 etc.) It is possible to
determine whether the speech voice of the passenger in the rear row is collected by the
microphone 10 for the front row, that is, whether the speech voice of the passenger in the rear
row has reached the passenger in the front row .
[0023]
The voice processing unit 12 and the amplifier 14 described above are the first voice output
means, the voice processing unit 32 and the amplifier 34 are the second voice output means, and
the voice output cancellation determination unit 18 is the first voice output stop means. The
voice output stop determination unit 38 corresponds to the second voice output stop means.
[0024]
FIG. 2 is a diagram showing the relationship between the volume of the voice of the passenger's
speech detected by the microphones 10 and 30, and the presence or absence of the sound output
from the speakers 16 and 36.
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2A shows the relationship between the volume of the voice of the voice of the passenger in the
front row detected using the rear row microphone 30 and the presence / absence (ON / OFF) of
the voice output from the speaker 36 (FIG. 2A). B) shows the relationship between the volume of
the speech of the passenger in the rear row detected using the front row microphone 10 and the
presence / absence (ON / OFF) of the sound output from the speaker 16.
[0025]
As shown in FIG. 2 (A), when the volume of the voice of the voice of the passenger in the front
row collected by the rear row microphone 30 is smaller than the reference value a, that is, the
volume of the voice of the voice of the passenger in the front row is When it is small and does
not reach the passenger in the rear row directly, the system of the voice processing unit 12, the
amplifier 14, and the speaker 36 is effective, and the voice of the passenger in the front row is
collected and amplified and output from the speaker 36 (Speaker 36 ON). The passenger in the
rear row can understand the content of the voice spoken by the passenger in the front row by
listening to the sound output from the speaker 36.
[0026]
However, if the volume of the voice of the voice of the passenger in the front row collected by the
rear row microphone 30 is larger than the reference value a, that is, the volume of the voice of
the voice of the passenger in the front row is large When it reaches, the system of the voice
processing unit 12, the amplifier 14, and the speaker 36 becomes invalid, and the voice of the
passenger in the front row is not output from the speaker 36 (speaker 36 OFF). However, since
the voice of the passenger in the front row has a large volume, the passenger in the rear row can
directly hear the voice and can understand the content of the voice of the passenger in the front
row. .
[0027]
Further, as shown in FIG. 2B, when the volume of the voice of the voice of the passenger of the
rear row collected by the front row microphone 10 is smaller than the reference value A, that is,
the voice of the voice of the passenger of the rear row When the volume is small and does not
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9
reach the passenger in the front row directly, the system of the voice processing unit 32, the
amplifier 34 and the speaker 16 is effective, and the voice of the passenger in the rear row is
collected and amplified. Output from the speaker 16 (ON). By listening to the voice output from
the speaker 16, the passenger in the front row can understand the content of the voice spoken
by the passenger in the rear row.
[0028]
However, when the volume of the voice of the voice of the passenger in the rear row collected by
the front row microphone 10 is larger than the reference value A, that is, the volume of the voice
of the voice of the passenger in the rear row is large. When it reaches, the system of the voice
processing unit 32, the amplifier 34, and the speaker 16 is disabled, and the voice of the
passenger in the rear row is not output from the speaker 16 (speaker 16 OFF). However, since
the voices of the voices of the passengers in the rear row are loud, the passengers in the front
row can directly listen to the voices of the voice and can understand the content of the voices of
the voices of the passengers in the rear row. .
[0029]
The reference values a and A for enabling / disabling the audio output from the speakers 16 and
36 do not need to use the same value, and appropriately set different values according to the
microphones 10 and 30 and the arrangement state of each passenger, etc. It is desirable to do.
[0030]
As described above, in the in-vehicle conversation support device 1 according to the present
embodiment, the speech voices of the passengers in the rear row directly reach the passengers in
the front row, or the voices of the passengers in the front row directly to the passengers in the
rear row When it arrives, in order to stop the voice output using the speakers 16 and 36, the
timing when the voice of the same utterance content is shifted by two systems (system directly
transmitted and system transmitted via the speaker) At the same time, it is possible to prevent
arrival at the same time, and to improve the difficulty of listening when the speech volume is
large.
[0031]
In addition, while detecting the voice of the passenger of the front row using the microphone 30
which collects the voice of the passenger of the rear row, the voice of the passenger of the rear
row is detected using the microphone 10 which collects the voice of the passenger of the front
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row By the detection, it is not necessary to separately prepare a configuration for voice detection,
and therefore, it is possible to reduce the cost by reducing the number of parts.
[0032]
Second Embodiment FIG. 3 is a diagram showing the configuration of the in-vehicle conversation
support device of the second embodiment.
The in-vehicle conversation support device 1A shown in FIG. 3 is different from the in-vehicle
conversation support device 1 shown in FIG. 1 in that voice recognition processing units 20 and
40 and display units 22 and 42 are added.
The following description will be given focusing on the added configuration.
[0033]
The voice recognition processing unit 20 repeats the presence or absence of arrival of the voice
of the passenger in the front row to the rear row of the passenger in the rear row repeatedly
(when the user hears or does not hear it). It analyzes the contents of the uttered voice and
displays it toward the rear row passengers.
Specifically, the content of the sound obtained by this analysis is displayed on the display unit 42
installed at a position where the rear seat passenger can see. Although the content of the
displayed sound may be hiragana display, it is preferable to display kanji kana mixed.
[0034]
The voice recognition processing unit 40 collects the sound with the microphone 30 when the
presence or absence of arrival of the voice of the passenger in the rear row to the passenger in
the front row is repeatedly switched (in the case of hearing or not hearing). It analyzes the
contents of the uttered voice and displays it to the front row passengers. Specifically, the content
of the voice obtained by this analysis is displayed on the display unit 22 installed at a position
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where the driver and the passenger at the front passenger seat can see. Although the content of
the displayed sound may be hiragana display, it is preferable to display kanji kana mixed.
[0035]
The voice recognition processing unit 20 described above corresponds to the first voice
recognition processing means, and the voice recognition processing unit 40 corresponds to the
second voice recognition processing means.
[0036]
FIG. 4 is a diagram showing the relationship between the volume of the voice of the passenger's
speech detected by the microphones 10 and 30, the presence or absence of the sound output
from the speakers 16 and 36, and the presence or absence of the sound content display by the
display units 22 and 42. is there.
In FIG. 4A, the volume of the voice of the voice of the passenger in the front row detected using
the rear row microphone 30, the presence or absence of the voice output from the speaker 36
(ON / OFF), and the display of the voice content by the display unit 42. The relationship with the
presence or absence (ON / OFF) is shown. Further, in FIG. 4B, the volume of the speech voice of
the passenger in the rear row detected using the front row microphone 10, the presence or
absence of the sound output from the speaker 16 (ON / OFF), and the sound from the display
unit 22. The relationship with the presence / absence of content display (ON / OFF) is shown.
[0037]
As shown in FIG. 4A, when the voice of the passenger in the front row collected by the rear row
microphone 30 is smaller than the reference value b1, that is, the volume of the voice of the
voice of the passenger in the front row is small. When the passenger in the rear row is not
reached at all, the system of the voice processing unit 12, the amplifier 14, and the speaker 36 is
effective, and the speech of the passenger in the front row is collected and amplified and output
from the speaker 36 (Speaker 36 ON). The passenger in the rear row can understand the content
of the voice spoken by the passenger in the front row by listening to the sound output from the
speaker 36. In addition, when the volume of the speech of the passenger in the front row
collected by the rear row microphone 30 is larger than the reference value b2 (> b1), that is, the
volume of the speech of the passenger in the front row is large. In the case of directly reaching
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the passenger, the system of the voice processing unit 12, the amplifier 14, and the speaker 36 is
invalidated, and the voice of the passenger in the front row is not output from the speaker 36
(speaker 36 OFF). However, since the voices of the passengers in this front row are loud, the
passengers in the rear row can directly listen to the voices and can clearly understand the
content of the voices of the passengers in the front row. It becomes. In these cases, since the
contents of the uttered voice can be understood by the output voice of the speaker 36 or the
voice directly reached, the analysis result of the uttered voice of the passenger in the front row
by the voice recognition processing unit 20 is It is not displayed on the display unit 42 (display
OFF).
[0038]
By the way, when the volume of the voice of the voice of the passenger in the front row collected
by the rear row microphone 30 is between the reference values b1 and b2, that is, the volume of
the voice of the voice of the passenger in the front row is so small that it can not be heard at all.
If the voice of the passenger in the front row is not large enough to be clearly heard and the
presence or absence of arrival of the voice in the rear row of the passenger in the rear row is
repeatedly switched or not heard, the voice recognition processing unit 20 The analysis result of
the voice of the passenger is displayed on the display unit 42 in the rear row. In this case, the
system of the voice processing unit 12, the amplifier 14, and the speaker 36 is effective, and the
voice of the passenger in the front row is collected, amplified, and output from the speaker 36
(speaker 36 ON) .
[0039]
Further, as shown in FIG. 4B, when the voice of the passenger in the rear row collected by the
front row microphone 10 is smaller than the reference value B1, that is, the volume of the voice
of the voice of the passenger in the rear row is When it is small and it does not reach the
passenger in the front row at all, the system of the voice processing unit 32, the amplifier 34 and
the speaker 16 is effective, and the voice of the passenger in the rear row is collected and
amplified and output from the speaker 16 (Speaker 16 ON). By listening to the voice output from
the speaker 16, the passenger in the front row can understand the content of the voice spoken
by the passenger in the rear row. When the volume of the voice of the voice of the passenger in
the rear row collected by the front row microphone 10 is larger than the reference value B2 (>
B1), that is, the volume of the voice of the voice of the passenger in the rear row is large. In the
case of directly reaching the passenger, the system of the voice processing unit 32, the amplifier
34 and the speaker 16 is invalidated, and the voice of the passenger in the rear row is not output
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from the speaker 16 (speaker 16 OFF). However, since the voices of the passengers in the rear
row are loud, the passengers in the front row can directly listen to the voice and can clearly
understand the content of the voices of the passengers in the rear row. It becomes. In these
cases, since the content of the uttered voice can be understood by the output voice of the speaker
16 or the voice directly reached, the analysis result of the uttered voice of the passenger in the
back row by the voice recognition processing unit 40 is It is not displayed on the display unit 22
(display OFF).
[0040]
By the way, when the volume of the voice of the voice of the passenger of the rear row collected
by the front row microphone 10 is between the reference values B1 and B2, that is, the volume of
the voice of the voice of the passenger of the rear row can not be heard at all If the voice of the
passenger in the rear row is not large enough to be clearly heard, and the presence or absence of
arrival of the voice in the front row of the passenger in the rear row is repeatedly heard or not
heard, the voice recognition processing unit 40 The analysis result of the voice of the passenger
is displayed on the display unit 22 of the front row. In this case, the system of the voice
processing unit 32, the amplifier 34, and the speaker 16 is effective, and the voice of the
passenger in the rear row is collected, amplified, and output from the speaker 16 (speaker 16
ON) .
[0041]
As described above, in the in-vehicle conversation support device 1A of the present embodiment,
although the speech voice of the passenger in the rear row directly reaches the passenger in the
front row, the volume is insufficient and the content can not be heard only partially. If the voice
of the passenger in the front row reaches the passenger in the rear row directly but the volume is
insufficient and the content can only be partially heard, the content of the voice is displayed. It is
possible to confirm and to compensate for the difficulty of listening due to lack of volume.
[0042]
By the way, in the second embodiment described above, as shown in FIG. 4, while displaying the
analysis result of the uttered voice (display ON), voice output is performed from the speakers 16
and 36 ( As shown in FIG. 5, while displaying the analysis result of the uttered voice (display ON),
the audio output from the speakers 16 and 36 may be stopped as shown in FIG. Speaker 16 OFF,
Speaker 36 OFF).
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This prevents the sounds of the same utterance content from being heard partially offset by two
systems (systems transmitted directly and systems transmitted via the speaker), and overlapping
of fragmentary offensive audio is avoided. It can be avoided.
[0043]
The present invention is not limited to the above embodiment, and various modifications can be
made within the scope of the present invention. For example, in the embodiment described
above, it is detected that the speech voice of the passenger in the front row has reached the
passenger in the rear row using the microphone 30 for the rear row, and the voice of the
passenger in the rear row reaches the passenger in the front row This is detected using the front
row microphone 10, but another microphone may be used to detect these sounds.
[0044]
FIG. 6 is a view showing the configuration of a modification of the in-vehicle conversation
support device in which a microphone is added for voice detection. The configuration shown in
FIG. 6 is different from the configuration shown in FIG. 1 in that microphones 24 and 44 are
added.
[0045]
FIG. 7 is a view showing the configuration of another modification of the in-vehicle conversation
support device in which a microphone is added for voice detection. The configuration shown in
FIG. 7 is different from the configuration shown in FIG. 3 in that microphones 24 and 44 are
added. The following description will be given focusing on the microphones 24 and 44 added in
these modifications.
[0046]
One of the microphones 24 is for collecting speech voice of the passenger in the rear row in the
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vicinity of the listening position of the passenger in the front row, and is installed, for example, in
the headrest of the driver's seat corresponding to the position of the driver's ear. ing. The other
microphone 44 is for collecting speech voice of the passenger in the front row in the vicinity of
the listening position of the passenger in the rear row, and, for example, the passenger in the
rear row (one of the left and right passengers) It is installed on the headrest of the rear seat
corresponding to the position of the ear of the. In addition, these installation positions are an
example, Comprising: You may make it change suitably.
[0047]
The voice output stop determination unit 18 determines whether the voice of the passenger in
the front row has reached the passenger in the rear row based on the voice signal output from
the microphone 44 installed in the rear seat. Further, the voice output stop determination unit 38
determines whether the voice of the passenger in the rear row has reached the passenger in the
front row based on the voice signal output from the microphone 24 installed in the driver's seat.
[0048]
Thus, by using the microphones 24 and 44 added to detect the presence or absence of voice
arrival, it can be determined more accurately whether voices of other passengers directly reach
each passenger or not. It is possible to appropriately switch the presence or absence of the audio
output from the speakers 16 and 36 in order to improve the difficulty of listening.
[0049]
Further, in the embodiment described above, the present invention is applied to a two-row seat
vehicle consisting of a front row and a rear row, but the present invention can be applied to a
three-row seat vehicle or more.
[0050]
As described above, according to the present invention, when the speech voice of the passenger
in the rear row directly reaches the passenger in the front row, or the speech voice of the
passenger in the front row directly reaches the passenger in the rear row In this case, since the
voice output using the speaker is stopped, it is possible to prevent the voice of the same
utterance content from reaching at the shifted timing, and it is possible to improve the difficulty
of listening when the speech volume is large. It becomes.
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16
[0051]
1 In-car conversation support device 10, 24, 30, 44 Microphone 12, 32 Voice processing unit 14,
34 Amplifier 16, 36 Speaker 18, 38 Voice output stop judging unit 20, 40 Voice recognition
processing unit 22, 42 Display unit
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