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JP2006050083

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DESCRIPTION JP2006050083
An object of the present invention is to improve the ease of hearing a guidance voice while
securing an audio output. A navigation unit executes setting of a planned route of a vehicle and
output of a guidance voice for guidance by a GPS communication unit, a route setting unit, map
data, and a guidance processing unit. When the navigation unit 10 outputs a guidance voice, the
music data adjustment unit 30 adjusts the sound information output from the audio unit 20, and
suppresses the audio portion, suppresses special effects, and corrects the balance between the
seats. . [Selected figure] Figure 1
Driver assistance system, navigation apparatus and in-vehicle audio apparatus
[0001]
The present invention relates to a driving support system having an information providing
function of outputting information related to vehicle traveling by voice and an audio function of
outputting contents including sound information, or a navigation device or vehicle that
constitutes the driving support system. The present invention relates to an audio apparatus, and
more particularly to a driving support system, a navigation apparatus, and an on-vehicle audio
apparatus, in which the ease of listening to a guide voice during music reproduction is improved.
[0002]
Heretofore, a navigation device has been realized which registers a planned route of the vehicle
and performs route guidance by voice.
09-05-2019
1
In this navigation device, an intersection where the host vehicle turns right and left is specified
based on the planned route, the map information, and the current position, and traveled along
the route set by notifying the driver in advance.
[0003]
At this time, although the screen display and the voice output are used in combination for the
driver's notification, it is not preferable to focus on the display at the time of driving the vehicle,
so the voice notification is very important.
[0004]
On the other hand, install an audio device, such as a device that receives radio and television
broadcasts, stream content, and reads and outputs information such as music and video recorded
on recording media such as CDs, DVDs and HD, in vehicles. Is also conventionally performed.
[0005]
Therefore, in the vehicle, the output of the sound from the audio device and the output of the
sound (guidance voice) from the navigation device are performed.
Here, when the output volume from the audio device is high, there is a possibility that a
passenger (especially a driver) may miss a guidance voice more important for the vehicle
traveling.
[0006]
Therefore, conventionally, for example, as shown in Patent Document 1, when performing audio
output of navigation when listening to music etc. from audio, the process of reducing the volume
of the music, etc. I have tried to improve the ease.
[0007]
Japanese Patent Application Laid-Open No. 7-320195
[0008]
09-05-2019
2
However, the readability of the guidance voice does not simply depend on the output volume
from the audio device.
Specifically, when a guidance voice is output in a state where the audio device outputs sound
information including voice (such as vocals), the passenger can hear the voice from the audio
device and the guidance voice mixedly Even if the output volume of the device is small, the ease
of listening to the guidance voice is significantly reduced.
[0009]
That is, the reduction in the ease of listening to the guidance voice due to the output from the
audio device (audio output) largely depends on the audio part included in the audio output.
However, in the prior art, it has been attempted to improve the ease of listening to the guidance
voice by reducing the volume of the audio output.
[0010]
Therefore, in order to ensure sufficient readability of the guidance voice, it is necessary to make
the volume very small, and there is a problem that the audio output can not be enjoyed.
In particular, since the guidance voice is necessary for the driver, a reduction in audio output has
been felt as a big discomfort for other occupants.
[0011]
On the other hand, when the guidance voice is output while securing the audio output, there is a
problem that the ease of listening to the guidance voice is inevitably reduced.
[0012]
Therefore, the realization of a navigation system capable of improving the ease of listening to the
09-05-2019
3
guide voice and simultaneously securing the audio output has been a very serious task.
[0013]
The present invention has been made to solve the problems of the above-described prior art and
solve the problems, and improves the ease of listening to the guidance voice and can
simultaneously secure the audio output, and the navigation It aims at providing a device and an
audio device.
[0014]
In order to solve the problems described above and achieve the object, the driving support
system according to the invention of claim 1 includes an information providing function of
outputting information related to vehicle traveling by voice and an audio that outputs content
including sound information. A driving support system having a function, wherein the
information providing function includes sound information adjusting means for adjusting the
content of sound information output by the audio function when the information providing
function provides information using a voice; It features.
[0015]
According to the first aspect of the present invention, the driving support system adjusts the
content of the sound information output by the audio function when the information providing
function provides the information using the voice.
[0016]
Further, in the driving support system according to the invention of claim 2, in the invention of
claim 1, the sound information adjusting means reduces or cancels the volume of the sound
portion of the sound information outputted by the audio function. It is characterized by
[0017]
According to the second aspect of the invention, the driving support system reduces or
eliminates the volume of the sound portion of the sound information output from the audio
function when the information providing function provides the information using the sound.
[0018]
The driving support system according to the invention of claim 3 is characterized in that, in the
invention of claim 2, the sound information adjusting means regards a center output of the sound
09-05-2019
4
information as the audio part.
[0019]
According to the third aspect of the present invention, when the information providing function
provides the information using the voice, the driving support system regards the center output in
the sound information outputted by the audio function as the sound portion and reduces the
volume of the sound information. Or delete it.
[0020]
Further, in the driving support system according to the invention of claim 4, in the invention of
claim 3, the sound information adjusting means regards a common portion of right output sound
and left output sound of stereo sound source data as the center output. It is characterized by
[0021]
According to the fourth aspect of the invention, when the information providing function
provides the information using the voice, the driving support system regards the common
portion of the right output sound and the left output sound of the stereo sound source data as
the center output. Reduce or eliminate the volume.
[0022]
The driving support system according to the invention of claim 5 is characterized in that, in the
invention of claim 3 or 4, the audio function performs surround processing on stereo sound
source data to calculate the center output. Do.
[0023]
According to the fifth aspect of the invention, when the information providing function provides
the information using the voice, the driving support system performs the surround processing on
the stereo sound source data to calculate the center output, and the center output is calculated.
Reduce or eliminate
[0024]
In the driving support system according to the invention of claim 6, according to the invention of
claim 5, the sound information adjusting means is a case where the information providing
function performs information provision using voice, and the audio function is When the
surround processing is not performed, the audio function is caused to execute the surround
09-05-2019
5
processing, and the center output obtained by the surround processing is reduced or eliminated.
[0025]
According to the sixth aspect of the present invention, the driving support system automatically
performs the surround processing when the information providing function performs the
information provision using the voice and the audio function does not execute the surround
processing. Reduce or eliminate the center output obtained by running.
[0026]
In the driving support system according to the invention of claim 7, in the invention according to
any one of claims 4 to 6, the sound information adjusting means determines whether or not the
audio function has a surround processing capability. When there is no surround processing
capability, a common portion of the right output sound and the left output sound of the stereo
sound source data is regarded as the center output, and the center output is reduced or
eliminated.
[0027]
According to the seventh aspect of the present invention, when the information providing
function provides the information using the voice, the driving support system determines
whether the audio function has the surround processing ability or not, and does not have the
surround processing ability. The center output is reduced or eliminated by regarding the
common portion of the right output sound and the left output sound of the stereo sound source
data as the center output.
[0028]
In the driving support system according to the invention of claim 8, in the invention according to
any one of claims 4 to 7, the sound information adjusting means determines whether the audio
function is executing the surround processing or not. When the surround processing is being
performed, the center output calculated by the surround processing is reduced or eliminated, and
when the surround processing is not being performed, the right output sound of the stereo sound
source data is selected. A portion common to the left output sound is regarded as the center
output, and the center output is reduced or eliminated.
[0029]
According to the eighth aspect of the present invention, when the information providing function
performs the information provision using the voice, the driving support system determines
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6
whether the audio function is executing the surround process and performs the surround
process. When it is medium, the center output calculated by the surround processing is reduced
or eliminated, and when the surround processing is not being performed, the common output of
the right output sound and the left output sound of the stereo sound source data is center output
It is considered that the center output is reduced or eliminated.
[0030]
Further, in the driving assistance system according to the invention of claim 9, in the invention
according to any one of claims 3 to 8, the sound information adjusting means may include
multiple center output data in which the audio function corresponds to the center output. When
channel sound source data is read, the center output indicated by the multi-channel sound source
data is reduced or eliminated.
[0031]
According to the invention of claim 9, when the information providing function provides
information using voice, the driving support system reduces or eliminates the center output
indicated in the multi-channel sound source data read by the audio function.
[0032]
In the driving support system according to the invention of claim 10, in the invention according
to any one of claims 3 to 9, the audio function virtually realizes the center output by adding to a
plurality of speakers, It is characterized in that, when instructed to reduce or cancel the center
output from the sound information adjustment means, the amount of addition to the plurality of
speakers is reduced or eliminated.
[0033]
According to the invention of claim 10, when the information providing function provides the
information using the voice, the driving support system is virtually reduced by reducing or
eliminating the amount of addition of the center output to the plurality of speakers. Reduce and
eliminate the center output.
[0034]
In the driving support system according to the invention of claim 11, in the invention according
to any one of claims 3 to 9, the audio function outputs the center output from a center speaker,
and the sound information adjustment means outputs The apparatus is characterized in that the
volume of the output from the center speaker is reduced or eliminated when the reduction or
09-05-2019
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elimination of the output is instructed.
[0035]
According to the eleventh aspect of the present invention, the driving support system reduces or
eliminates the output sound volume from the center speaker when the information providing
function provides information using voice.
[0036]
In the driving support system according to the invention of claim 12, according to the invention
of any one of claims 3 to 11, the sound information adjusting means outputs the center output
based on the type of the sound source read by the audio function. Automatically selecting a
process to be used for reduction or elimination of
[0037]
According to the invention of claim 12, when the information providing function provides
information using voice, the driving support system identifies the type of sound source data read
by the audio function and uses it for reduction or elimination of the center output. Automatically
select the process.
[0038]
The driving support system according to the invention of claim 13 is characterized in that, in the
invention of any one of claims 1 to 12, the sound information adjusting means stops the addition
of the special effect by the audio function. .
[0039]
According to the invention of the thirteenth aspect, the driving support system stops the addition
of the special effect by the audio function when the information providing function performs the
information provision using the voice.
[0040]
The driving support system according to the invention of claim 14 is characterized in that, in the
invention of claim 13, the sound information adjusting means stops the upward localization
process for the sound information.
09-05-2019
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[0041]
According to the invention of claim 14, when the information providing function provides the
information using the voice, the driving support system stops the upward localization process for
the sound information output by the audio function.
[0042]
The driving support system according to the invention of claim 15 is characterized in that, in the
invention of claim 13 or 14, the sound information adjusting means stops the bass adjustment
processing for the sound information.
[0043]
According to the fifteenth aspect of the invention, the driving support system stops the bass
adjustment processing for the sound information output by the audio function when the
information providing function provides the information using the voice.
[0044]
The driving support system according to the invention of claim 16 is characterized in that, in the
invention of claim 13, 14 or 15, the sound information adjusting means stops the emphasizing
process of the predetermined band for the sound information.
[0045]
According to the sixteenth aspect of the present invention, when the information providing
function provides the information using the voice, the driving support system stops the
enhancement processing of the predetermined band for the sound information output by the
audio function.
[0046]
The driving support system according to the invention of claim 17 is characterized in that, in the
invention of any one of claims 13 to 15, the sound information adjusting means stops the
reverberation adding process for the sound information.
[0047]
According to the seventeenth aspect of the present invention, the driving support system stops
the reverberation adding process on the sound information output by the audio device when the
information providing function provides the information using the voice.
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9
[0048]
According to the eighteenth aspect of the present invention, in the driving support system
according to any one of the thirteenth to seventeenth aspects, the sound information adjustment
means stops the addition of the special effect at least at a driver's seat and a front passenger's
seat. It is characterized in that it is executed for output for one seat.
[0049]
According to the eighteenth aspect of the present invention, the driving support system stops the
addition of the special effect to the audio output to the driver's seat or the passenger's seat when
the information providing function provides the information using the voice.
[0050]
Further, in the driving support system according to the invention of claim 19, in the invention of
any one of claims 1 to 18, the sound information adjusting means adjusts at least the content of
the sound information to be output to the driver's seat. , And correct the sound information
output to the other seat.
[0051]
According to the invention of claim 19, when the information providing function provides
information using voice, the driving support system adjusts at least the contents of the sound
information to be output to the driver's seat, and applies to other seats. Correct the sound
information to be output.
[0052]
A navigation device according to the invention of claim 20 is a navigation device for performing
route guidance of the host vehicle, wherein guidance voice output means for executing route
guidance by voice and the guidance voice output means output guidance voice. In the case of
carrying out the method, the present invention is characterized in that sound information
adjustment means for determining the adjustment content for sound information output from the
audio device and outputting the adjustment content to the audio device is provided.
[0053]
According to the twentieth aspect of the present invention, when performing route guidance by
voice, the navigation device determines adjustment contents for sound information output from
09-05-2019
10
the audio device, and outputs it to the audio device.
[0054]
The on-vehicle audio apparatus according to the invention of claim 21 is an on-vehicle audio
apparatus for outputting contents including at least sound information, and the guidance voice
detection for detecting the output of the guidance voice by the navigation apparatus for route
guidance of the own vehicle. And means for adjusting the contents of the sound information
when the guidance voice detection means detects the output of the guidance voice.
[0055]
According to the twenty-first aspect of the present invention, the on-vehicle audio device adjusts
the content of the sound information output from the audio device when the navigation device
outputs the guidance voice.
[0056]
According to the invention of claim 1, the driving support system adjusts the content of the
sound information output by the audio function when the information providing function
provides the information using the voice, thereby improving the ease of hearing the guidance
voice. Thus, the driving support system capable of simultaneously securing the audio output can
be obtained.
[0057]
According to the invention of claim 2, the driving support system reduces or eliminates the
volume of the sound portion of the sound information output from the audio function when the
information providing function provides the information using the sound. Therefore, it is possible
to obtain a driving support system in which the ease of listening to the guide voice is improved
while the audio output is secured by selectively reducing and erasing the audio part from the
audio output.
[0058]
Further, according to the invention of claim 3, when the information providing function provides
information using voice, the driving support system regards the center output as the voice part in
the sound information outputted by the audio function and determines the volume of the sound
information. Since the reduction or elimination is performed, it is possible to obtain the driving
support system in which the voice part is appropriately eliminated and reduced to improve the
ease of hearing the guidance voice.
09-05-2019
11
[0059]
Further, according to the invention of claim 4, when the information providing function provides
information using voice, the driving support system regards the common portion of the right
output sound and the left output sound of stereo sound source data as the center output. Since
the volume is reduced or eliminated, it is possible to obtain a driving assistance system with a
simple configuration in which the audio part is appropriately eliminated and reduced to improve
the ease of hearing the guidance voice.
[0060]
Further, according to the invention of claim 5, when the information providing function provides
information using voice, the driving support system performs surround processing on stereo
sound source data to calculate the center output, and the center is calculated. Since the output is
reduced or eliminated, it is possible to obtain the driving support system in which the voice part
is surely eliminated and reduced to improve the ease of hearing the guidance voice.
[0061]
Further, according to the invention of claim 6, the driving support system automatically performs
surround processing when the information providing function performs information provision
using voice and the audio function does not execute the surround processing. Since the center
output obtained by executing the above is reduced or eliminated, it is possible to obtain a driving
support system in which the ease of hearing the guidance voice is improved by effectively
utilizing the surround processing.
[0062]
Further, according to the invention of claim 7, when the information providing function provides
information using sound, the driving support system determines whether or not the audio
function has a surround processing capability, and does not have a surround processing
capability. In this case, a common part of the right output sound and the left output sound of the
stereo sound source data is regarded as a center output and the center output is reduced or
eliminated, thereby improving the ease of listening to the guidance voice by processing suitable
for the audio function. An effect is obtained that a driving support system can be obtained.
[0063]
Further, according to the invention of claim 8, when the information providing function provides
information using sound, the driving support system determines whether or not the audio
09-05-2019
12
function is executing surround processing, and performs the surround processing. If the center
output calculated by the surround processing is reduced or eliminated if it is being performed,
and if the surround processing is not being performed, the common part of the right output
sound and the left output sound of the stereo sound source data is Since the center output is
reduced or eliminated on the assumption that it is an output, it is possible to obtain a driving
support system in which the ease of listening to the guidance voice can be improved by
processing suitable for the operation state of the audio.
[0064]
Further, according to the invention of claim 9, the driving support system reduces or eliminates
the center output indicated in the multi-channel sound source data read by the audio function
when the information providing function provides information using voice. Therefore, it is
possible to obtain a driving support system in which the audio part of the multi-channel sound
source data is appropriately erased and reduced to improve the ease of listening to the guidance
voice.
[0065]
Further, according to the invention of claim 10, when the information providing function
provides information using voice, the driving support system reduces or eliminates the add-in
amount for the center output to the plurality of speakers, thereby realizing virtual Since the
central output is reduced and eliminated, it is possible to obtain a driving support system that
improves the ease of listening to the guide voice even when the central speaker is not provided.
[0066]
Further, according to the invention of claim 11, the driving support system reduces or eliminates
the volume of the output from the center speaker when the information providing function
provides the information using voice, so that the center speaker is arranged. An effect is obtained
that it is possible to obtain a driving assistance system that can surely improve the ease of
hearing the guidance voice.
[0067]
Further, according to the invention of claim 12, when the information providing function
provides information using voice, the driving support system identifies the type of sound source
data read by the audio function, and reduces or cancels the center output. Since the process to be
used is automatically selected, it is possible to obtain a driving support system that appropriately
removes and reduces the voice portion regardless of the type of the sound source to improve the
ease of hearing the guidance voice.
09-05-2019
13
[0068]
Further, according to the invention of claim 13, when the information providing function
provides the information using the voice, the driving support system stops the addition of the
special effect by the audio function, so the guidance voice can be easily heard by the special
effect. An effect is obtained that it is possible to obtain a driving support system capable of
preventing the reduction of the driving speed.
[0069]
Further, according to the invention of claim 14, when the information providing function
provides the information using the voice, the driving support system stops the upward
localization processing for the sound information output by the audio function. An effect is
obtained that it is possible to obtain a driving support system capable of preventing a reduction
in the ease of hearing the guidance voice.
[0070]
Further, according to the invention of claim 15, the driving support system stops the bass
adjustment processing for the sound information output by the audio function when the
information provision function performs the information provision using the voice, so that the
bass adjustment processing is performed. An effect is obtained that it is possible to obtain a
driving support system capable of preventing a reduction in the ease of hearing the guidance
voice.
[0071]
Further, according to the invention of claim 16, when the information providing function
provides the information using the voice, the driving support system stops emphasizing
processing of the predetermined band for the sound information output by the audio function.
There is an effect that it is possible to obtain a driving support system capable of preventing a
reduction in the ease of listening to the guidance voice due to the emphasizing processing of the
above.
[0072]
Further, according to the invention of claim 17, the driving support system stops the
reverberation adding process for the sound information output by the audio device when the
information providing function provides the information using the voice, so the guidance by the
reverberation effect is provided. An effect is obtained that it is possible to obtain a driving
09-05-2019
14
support system capable of preventing a reduction in the ease of hearing voices.
[0073]
Further, according to the invention of claim 18, the driving support system stops the addition of
the special effect to the audio output to the driver's seat or the passenger's seat when the
information providing function provides the information using the voice, so that the driving can
be performed. It is effective in the ability to obtain the driving assistance system which can
prevent the fall of the audio output quality in other seats, improving the ease of hearing the
guidance voice in a seat.
[0074]
Further, according to the invention of claim 19, when the information providing function
provides information using voice, the driving support system adjusts at least the contents of the
sound information to be output to the driver's seat, and makes the other seats Since the sound
information to be output is corrected, it is possible to improve the ease of listening to the guide
voice at the driver's seat and obtain a driving support system capable of securing the audio
output quality at other seats. .
[0075]
Further, according to the invention of claim 20, when the navigation apparatus executes route
guidance by voice, it determines the adjustment contents for the sound information outputted by
the audio apparatus and outputs it to the audio apparatus. This has the effect of improving the
ease of hearing and providing a navigation device capable of securing the output quality of the
audio device.
[0076]
Further, according to the invention of claim 21, when the navigation device outputs the guidance
voice, the in-vehicle audio device adjusts the contents of the sound information output from the
audio device, so that it is easy to hear the guidance voice output by the navigation device. This
has the effect of being able to obtain a navigation system capable of improving the audio quality
and ensuring the quality of the audio output.
[0077]
A navigation system, which is a preferred embodiment of a driving assistance system, a
navigation device and an audio device according to the present invention, will be described in
detail with reference to the accompanying drawings.
09-05-2019
15
[0078]
FIG. 1 is a schematic configuration view showing a schematic configuration of a navigation
system 1 according to an embodiment of the present invention.
As shown in the figure, the navigation system 1 includes a navigation unit 10, an audio unit 20, a
music data adjustment unit 30, an output control unit 40, a display D1, and speakers SP1 to SP4.
[0079]
The navigation unit 2 is a unit for setting a planned route of the vehicle and performing route
guidance, in which a GPS (Global Positioning System) communication unit 11, a route setting unit
12, map data 13, and a guidance processing unit 14 are provided. Have.
Here, the GPS communication unit 11, the route setting unit 12, and the guidance processing unit
14 may be configured by a microcomputer or the like, or may be configured by an electronic
circuit.
Further, this configuration is divided according to each function, and the physical configuration
may be integrated in whole or in part.
[0080]
The GPS communication unit 11 receives information from a GPS satellite, acquires time
information, and specifies position information of the host vehicle.
Further, the GPS communication unit 11 outputs the specified position of the host vehicle to the
route setting unit 12 and the guidance processing unit 14.
09-05-2019
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[0081]
The route setting unit 12 is a processing unit that sets and stores the planned route of the host
vehicle based on user input from a driver or the like, the current position acquired from the GPS
communication unit 11, and the like.
The route setting unit 12 also outputs the set route to the guidance processing unit 14.
[0082]
The map data 13 is data of map information stored in an arbitrary recording medium such as a
hard disk drive, CD, DVD, etc., and is used for the route setting unit 12 and the guidance
processing unit 14.
Note that the recording medium for recording the map data 13 may be shared with the audio
unit 20 and other in-vehicle devices.
[0083]
The guidance processing unit 14 is a processing unit that executes route guidance based on the
outputs of the GPS communication unit 11, the route setting unit 12, and the map data 13, and
the guidance display creation unit 14a and the guidance voice creation unit 14b are provided
therein. Is equipped.
[0084]
Specifically, based on the planned route and the position of the host vehicle, the guidance
processing unit 14 detects a place (for example, an intersection where the driver turns) to be
guided to the occupant (in particular, the driver). When the place where guidance should be
performed approaches, guidance processing is performed using the guidance display creation
unit 14a and the guidance voice creation unit 14b.
[0085]
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The guidance display creation unit 14a creates display data indicating contents to be notified to
the driver by display, for example, a map in the vicinity of the intersection where the driver turns
left or right, and the direction of right or left turn, and outputs the created display data to the
output control unit 40.
In addition, the guidance voice creation unit 14b creates voice data indicating the content to be
notified to the driver by voice, such as the distance to the intersection where the driver turns left
or right, the direction of the turn, etc. Output to
[0086]
The audio unit 20 is a unit for providing a passenger with various contents such as music and
video, and includes a CD drive 21, a DVD drive 22, a radio tuner 23, a television tuner 24, and a
main control unit 25 therein.
[0087]
The CD drive 21 and the DVD drive 22 respectively read music information and video
information from CD media and DVD media, and output the read information to the main control
unit 25.
The radio tuner 23 and the television tuner 24 receive radio broadcast and television broadcast,
respectively, and output them to the main control unit 25.
[0088]
In addition to this, a configuration may be provided in which content is read from a hard disk or
content such as stream content is received via a network such as the Internet.
[0089]
The main control unit 25 performs various processes on the content read or received from the
CD drive 21, the DVD drive 22, the radio tuner 23, the television tuner 24 and the like, and
supplies the processed content to the output control unit 40.
09-05-2019
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Specifically, the main control unit 25 internally includes a stereo sound source processing unit
25a, a 5.1 ch sound source processing unit 25b, a special effect adding unit 25c, and a display
control unit 25d.
[0090]
The stereo sound source processing unit 25a is a processing unit that performs vocal off
processing and surround processing on the sound information when the sound information of
the content is a stereo sound source.
The vocal off process is a process of deleting an audio part (such as vocal) from music data or
reducing the volume of the audio part.
[0091]
The stereo sound source data is created on the premise of outputting from the two left and right
speakers, data of the right output sound assumed to be outputted from the right speaker and left
output sound assumed to be outputted from the left speaker And data.
Then, by giving a difference to the left and right output sounds, it is possible to make the listener
feel a sense of direction and a sense of distance.
[0092]
Here, in music data having an audio part including lyrics and the like and a performance part, the
audio part is equally distributed to the right output sound and the left output sound so that the
audio part can be heard from the center.
[0093]
Therefore, in the vocal-off process, data of the left and right output sounds are compared, and a
portion included in common is regarded as an audio portion, and a process of suppressing or
09-05-2019
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deleting the portion is executed.
Such vocal-off processing is conventionally used as a karaoke function for letting the user play
only the performance part and use it for the user's own singing.
[0094]
The surround processing is processing for calculating virtual output in a desired direction, such
as virtual center output, from stereo sound source data, and adjusting the output sound of each
speaker so that sound can be heard from that direction.
[0095]
5.1
The ch sound source processing unit 25 b is a processing unit that performs processing to
reproduce sound information of the content when the sound information of the content is a 5.1
ch sound source.
5.1The ch sound source data is created on the premise of being output from six speakers for the
front, right front, left front, right rear, left rear, and bass output of the listener, and has six data in
each direction. .
[0096]
Here, when a dedicated speaker can not be provided in each direction, for example, when there is
no center speaker provided on the front, another speaker, the center output to be output from
the center speaker, the right front speaker on the right front or the left front The virtual center
output is realized by assigning to the left front speaker and adding it as a center component.
[0097]
The main control unit 20 automatically identifies whether the read sound information is stereo
sound source data or 5.1ch sound source data, and which one of the stereo sound source
processing unit 25a and the 5.1ch sound source processing unit 25b is used You should decide.
[0098]
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20
The special effect adding unit 25 c is a processing unit that adds various special effects to the
output sound to realize an improvement in sound quality (improvement of a sense of reality).
Specifically, the special effect adding unit 25c executes upward localization processing, bass
adjustment processing, enhancement processing of a predetermined band, reverberation addition
processing, and the like.
[0099]
Here, the upward localization process is a process of adding an effect that the output sound can
be heard from above with respect to the speaker position, and the bass adjustment process is a
process of performing correction or synthesis on the bass range of the output sound and
emphasizing It is.
Also, enhancement processing of a predetermined band is so-called loudness processing that
enhances bass / treble.
Furthermore, the reverberation addition processing is processing for producing reverberation by
acoustic processing.
[0100]
The display control unit 25d creates the video as the display data when the content includes a
video, and the information about the music as the display data when the content is music
information not including the video, and outputs the display data to the output control unit 40.
[0101]
The output control unit 40 combines the outputs of the navigation unit 10 and the audio unit 20
as necessary to determine the output contents from the display D1 and the speakers SP1 to SP4,
and performs control to execute output processing.
[0102]
09-05-2019
21
When the navigation unit 10 outputs a guidance voice, the music data adjustment unit 30
performs processing of adjusting the content of the sound information output by the audio unit
20 to improve the ease of hearing the guidance voice.
[0103]
Specifically, the music data adjustment unit 30 internally includes a voice suppression processing
unit 31, a special effect suppression unit 32, and a balance adjustment unit 33.
[0104]
The sound suppression processing unit 31 executes processing for deleting or suppressing the
sound portion in the sound information output from the audio unit 20.
That is, when the guidance voice is output in the state where the audio unit 20 is outputting
music information, the passenger can hear the voice part (vocal part) from the audio device and
the guidance voice mixedly, so the user can hear the guidance voice correctly. It becomes
difficult.
Therefore, by removing and suppressing only the audio part from the output of the audio unit
20, the ease of listening to the guide voice can be improved while providing the music
information.
[0105]
Specifically, when the audio unit 20 reads stereo sound source data, the sound suppression
processing unit 31 executes the vocal off processing by the stereo sound source processing unit
25a and the deletion / suppression of the sound portion by stereo processing.
[0106]
Generally, when stereo processing sound information including an audio part, the audio part is
assigned to the center output.
09-05-2019
22
Therefore, in order to execute deletion / suppression of the audio part by stereo processing, the
calculated center output may be regarded as an audio part, and the volume of the center output
may be reduced.
[0107]
Similarly, even for 5.1ch sound source data, the audio part is generally assigned to the center
output.
Therefore, when the audio unit 20 reads out 5.1 ch sound source data, the sound suppression
processing unit 31 reduces the volume of the center output to improve the ease of listening to
the guidance sound.
[0108]
Here, when there is a speaker for center output (center speaker), by reducing the volume of the
center speaker, it is possible to erase / suppress the center output, that is, the audio part.
On the other hand, when there is no center speaker, in order to realize a virtual center output,
the center component to be added to other speakers (the right front speaker on the right front
and the left front speaker on the left front) is reduced or added. Eliminate and suppress the audio
part by eliminating it.
[0109]
The processing of the voice suppression processor 31 is shown in FIG.
As shown in the figure, at time t11 when the guidance voice G1 is turned on, the center
component MC1 of the audio output is decreased, and the center component MC1 is recovered at
the end of output of the guidance voice G1 (time t12).
09-05-2019
23
Further, with regard to the side component MS1 that can be heard from the lateral direction, a
constant output is secured regardless of the on / off of the guidance voice G1.
[0110]
Here, when the center component MC1 drops, by making the center component zero (erasing the
voice portion), the ease of hearing the guidance voice can be most improved.
On the other hand, leaving the center component (suppressing the audio part) makes it possible
for the passenger to hear the audio part of the audio output while improving the ease of hearing
the guidance voice.
Which one of the deletion and suppression of the audio part is used may be determined in
advance or may be selectable by the user.
Also, automatic selection may be made according to the contents of audio output.
[0111]
Also, it can be arbitrarily selected whether the sound suppression processing is realized by the
vocal off processing or the surround processing.
For example, when the audio unit 20 has a function (surround function) for executing surround
processing, the audio suppression processing is realized by the surround processing, and when
the surround function is not provided, the audio suppression processing is realized by the vocal
off processing. It is also good.
[0112]
Furthermore, it is general that the surround function can be turned on and off at the user's
designation.
09-05-2019
24
Therefore, if the surround function is turned off at the time of guidance voice output, it is forced
to be turned on to execute the surround processing to erase and suppress the center output.
[0113]
The processing operation in the case of selecting processing to be used for sound suppression
based on whether the audio unit 20 has a surround function or not is shown in the flowchart of
FIG.
The processing flow shown in FIG. 3 is repeatedly executed when the navigation system 1 is
powered on.
[0114]
First, the voice suppression processing unit 31 confirms whether or not there is a request for
output of a guidance voice from the navigation unit 10 (step S101), and ends the processing
when there is no request for output of a guidance voice (step S101, No). .
[0115]
On the other hand, when there is a request for outputting a guidance sound (Yes at step S101),
the sound suppression processing unit 31 determines whether the audio unit 20 has a surround
function (step S102).
[0116]
As a result, if there is a surround function (Yes at step S102), the surround function of the audio
unit 20 is turned on (step S103), and the addition of the center output to the front speaker is
reduced (step S104).
Thereafter, the output of the guidance voice is started (step S105), and when the output of the
guidance voice is finished (Yes in step S106), the surround function is turned off (step S107), and
the processing is ended.
09-05-2019
25
[0117]
On the other hand, if there is no surround function (step S102, No), the audio unit 20 starts the
vocal off process (step S111) and then starts outputting the guidance voice (step S112), and the
output of the guidance voice ends ((step S112) In step S113, Yes, the vocal off process is finished
(step S114), and the process flow is finished.
[0118]
Also, if the audio unit 20 is capable of performing both surround processing and vocal off
processing, the audio processing is realized by the surround processing when the surround
function is on at the time of guidance audio output, and the surround function is off. If so, vocal
suppression may be performed by vocal off processing.
[0119]
The processing operation in the case of selecting the processing used for sound suppression
based on the on / off of the surround function is shown in the flowchart of FIG.
The processing flow shown in FIG. 4 is repeatedly executed when the navigation system 1 is
powered on.
[0120]
First, the voice suppression processing unit 31 checks whether or not there is a request for
output of a guidance voice from the navigation unit 10 (step S201), and ends the processing
when there is no request for output of a guidance voice (step S201, No). .
[0121]
On the other hand, when there is a request for output of guidance voice (Yes at step S201), the
audio suppression processor 31 determines whether the surround function of the audio unit 20
is on (step S202).
[0122]
As a result, when the surround function is on (step S202, Yes), the addition of the center output
09-05-2019
26
to the front speaker is reduced (step S203) and the output of the guidance voice is started (step
S204), and the guidance voice is output. At the time when the process ends (step S205, Yes), the
addition of the center output to the front is recovered (step S206), and the process is ended.
[0123]
On the other hand, when the surround function is off (No at step S202), the audio unit 20 starts
vocal-off processing (step S211) and then starts outputting the guidance voice (step S212), and
the guidance voice output ends. The vocal off process is ended at a time point (step S213, Yes)
(step S214), and the process flow is ended.
[0124]
Next, when the navigation unit 10 outputs the guidance voice, the special effect suppression unit
32 executes the processing for stopping the addition of the special effect by the special effect
addition unit 25 c, thereby improving the ease of hearing the guidance voice. Do.
[0125]
The process of the special effect suppressing unit 32 is shown in FIG.
As shown in the figure, at time t21 when the guidance voice G2 is turned on, the special effect of
the audio output is turned off, and the special effect is recovered at the time when the output of
the guidance voice G2 ends (time t22).
[0126]
Specifically, when the special effect adding unit 25c performs the upward localization processing,
the audio part of the music information output by the audio unit 20 sounds like it is in front of
the passenger's eyes, so the guidance voice is conscious It is difficult for the passenger to miss
the guidance voice.
Therefore, the ease of listening to the guidance voice is improved by stopping the upward
localization processing while the guidance voice is being output.
09-05-2019
27
[0127]
In addition, when the special effect adding unit 25c is performing the bass adjustment
processing, masking of a high frequency band sound occurs compared to the emphasized band.
If the guidance voice is output in the band in which this masking occurs, the ease of listening is
reduced, so that the ease of hearing can be improved by stopping the bass adjustment processing
during the output of the guidance voice.
[0128]
Furthermore, even when the special effect adding unit 25c performs the emphasizing process on
the predetermined band, masking is generated as in the case of the bass adjustment process, so
the emphasizing process on the predetermined band is stopped while the guidance voice is
output. Can improve the ease of listening.
[0129]
In addition, even when the special effect adding unit 25c is performing the reverberation adding
process, the reverberation sound makes it difficult for the guidance voice to be aware of the
guidance voice, and the passenger may miss the guidance voice.
Therefore, by stopping the reverberation processing during the output of the guidance voice, the
ease of listening to the guidance voice is improved.
[0130]
By the way, the guidance voice is most important to the driver, and the other crew members may
be required to maintain the output of the audio unit 20, for example, the quality of music, rather
than the ease of hearing the guidance voice.
[0131]
Therefore, the suppression of the special effect by the special effect suppression unit 32 is
performed for the output to the driver's seat, and the addition of the special effect is continued
09-05-2019
28
for the output to the other seat, thereby the audio unit 20 for the other seat occupants. Output
quality can be maintained.
[0132]
In addition, if the speakers used for output to the driver's seat and the speakers used for output
for the passenger seat are shared due to the arrangement of speakers in the passenger
compartment (for example, the right speaker for the driver's seat side and the left for the
passenger side door) In the case where stereo output is performed by installing a speaker), if the
special effect is suppressed for the output to the driver's seat and the special effect is added to
the output for the passenger seat, the balance of the left and right sounds is broken.
[0133]
Therefore, in such a situation, it is desirable to suppress the addition of special effects on the
outputs to the driver's seat and the passenger's seat.
[0134]
Below, the process of the balance adjustment part 33 is demonstrated.
As described above, it is useful to adjust the audio output to the driver's seat to improve the
intelligibility of the guidance voice at the driver's seat.
In addition, by performing the above-described process while reducing the volume of the entire
audio output to the driver's seat, the ease of listening to the guidance voice can be further
improved.
[0135]
However, adjusting or lowering the audio output to the driver's seat or the front passenger's seat
changes the way the audio output can be heard by the occupant sitting in the rear seat.
In particular, when the output using the surround processing is performed, the quality of the
09-05-2019
29
audio output at the rear seat (volume feeling and the volume of the audio part) is reduced by
processing the audio output to the driver's seat and the passenger's seat.
[0136]
Therefore, when processing the audio output to the driver's seat or the front passenger seat, the
balance adjustment unit 33 corrects the output to the rear seat to reduce the discomfort for the
occupant of the rear seat.
[0137]
Specifically, as shown in FIG. 6, when the audio output F1 from the front speaker is decreased at
time t31 when the guide voice G3 is turned on, the audio output R1 from the rear speaker is
increased.
Then, the audio output F1 from the front speaker and the audio output R1 from the rear speaker
are respectively restored at the output end time (time t32) of the guide voice G3.
[0138]
Here, the case where the output volume from the front speakers is entirely reduced has been
described, but in the case of reducing the center component of a specific part of the output from
the front speakers, for example, the output of the rear speakers On the other hand, correction is
made by adding the center component.
[0139]
As described above, in the navigation system 1 according to the present embodiment, when the
navigation unit 10 outputs the guidance voice, the music data adjustment unit 30 adjusts the
sound information output from the audio unit 20, and By performing suppression, suppression of
special effects, and correction of the balance between the seats, the ease of listening to the guide
voice is improved while securing the audio output.
[0140]
Although the navigation system in which the navigation unit and the audio unit are integrally
formed has been described as an example in the present embodiment, the use of the present
invention is not limited to this.
09-05-2019
30
[0141]
For example, by providing the navigation device with the same function as the music data
adjustment unit 30, the present invention can be implemented as a navigation device
independent of the audio device.
In this case, the navigation device sends a signal to specifically instruct the audio device on the
adjustment content of the output sound.
[0142]
If the audio device is provided with the same function as the music data adjustment unit 30, the
present invention can be implemented as an audio device independent of the navigation device.
In this case, the audio device receives notification of execution of voice guidance from the
navigation device, and determines the specific adjustment contents for the output sound in the
audio device.
[0143]
Furthermore, in the present embodiment, 5.1ch sound source data widely used at present as
sound source data having a plurality of channels has been described as an example, but sound
source data of an arbitrary number of channels such as 7.1ch sound source data is similarly
described. It goes without saying that the present invention is applicable.
[0144]
In the present embodiment, a navigation system is given as a specific example in the case of
providing information by voice and assisting driving, but the use of the present invention is not
limited to this and it is obtained by road-to-vehicle communication. When notifying information,
it is widely applicable to provision of information to users by sound.
[0145]
09-05-2019
31
As described above, the driving support system, the navigation apparatus, and the in-vehicle
audio apparatus according to the present invention are useful for route guidance by voice, and
particularly suitable for voice guidance parallel to audio output.
[0146]
FIG. 1 is a schematic configuration view showing a schematic configuration of a navigation
system according to an embodiment of the present invention.
It is explanatory drawing explaining the process of the audio | voice suppression process part
shown in FIG.
It is an explanatory view explaining processing operation which chooses processing used for
sound control based on existence of a surround function.
It is explanatory drawing explaining the processing operation in the case of selecting the process
used for audio | voice suppression based on the on-off of a surround function.
It is explanatory drawing explaining the process of the special effect suppression part shown in
FIG.
It is explanatory drawing explaining the process of the balance adjustment part shown in FIG.
Explanation of sign
[0147]
DESCRIPTION OF SYMBOLS 1 navigation system 10 navigation unit 11 GPS communication part
12 route setting part 13 map data 14 guidance processing part 14a guidance display preparation
part 14b guidance audio creation part 20 audio unit 21 CD drive 22 DVD drive 23 radio tuner 24
television tuner 25 main control part 25a stereo sound source processing unit 25b 5.1ch sound
source processing unit 25c special effect adding unit 25d display control unit 30 music data
adjustment unit 31 audio suppression processing unit 32 special effect suppression unit 33
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32
balance adjustment unit 40 output control unit D1 display SP1 to SP4 speaker
09-05-2019
33
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