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DESCRIPTION JP2006295443

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DESCRIPTION JP2006295443
PROBLEM TO BE SOLVED: To reduce the degree to which music heard by a passenger is
distorted in a voice control apparatus which outputs guidance voice to a speaker for an audio
device and changes the left / right balance of music output at the time of voice guidance.
SOLUTION: The sound source switching unit 34 outputs an R channel sound of stereo music
reproduced by the audio device 2 to the driver's seat side speaker 4 at the same time as an audio
guidance is not performed at the same time. At the timing of controlling the switches 32 and 33
so as to output to 5 and performing voice guidance, the driver's seat side speaker 4 is caused to
output only the guidance voice from the vehicle navigation device 1 and at the same time The
switches 32 and 33 are controlled so as to output the mixed voice of the channel voice and the L
channel voice. [Selected figure] Figure 2
Voice output control device and voice output control program
[0001]
The present invention relates to an audio output control device and an audio output control
program for controlling the output of guidance voice and music to a speaker in a car.
[0002]
Conventionally, in a navigation device for a vehicle, there is a case where a speaker for an audio
device in a vehicle outputs a guidance voice.
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In such a configuration, there is a problem that when the music reproduced by the audio device
and the guidance voice are simultaneously output from the speaker, it becomes difficult to hear
the guidance voice. As a method of coping with such a problem, a method of making it easy to
listen to the guidance voice is put into practical use by muting the music output in the speaker
near the driver's seat in the car and making the speaker output the voice guidance during voice
guidance. ing.
[0003]
However, in such a technique, when stereo audio guidance is performed, the music that can be
heard by the occupant may be distorted due to the change in the balance between the left and
right of the music output. For example, when the guitar part is recorded only in the driver's seat
side channel, the guitar part is removed at the time of voice guidance, and the occupant feels
uncomfortable.
[0004]
In view of the above points, the present invention reduces the degree to which the music heard
by the passenger is distorted in a voice control apparatus that outputs guidance voice to a
speaker for an audio device and changes the left / right balance of music output at the time of
voice guidance. The purpose is
[0005]
The invention according to claim 1 for achieving the above object is characterized in that the
right audio signal of stereo music reproduced by the stereo music reproducing device is used as
the first speaker based on the fact that the audio guidance device is not at the timing of audio
guidance. At the same time as outputting, the first audio signal and the left audio signal of the
stereo music reproduced by the stereo music reproducing device are output to the second
speaker, and the first and the second are based on the timing when the audio guiding device
performs audio guidance. Among the two speakers, the guidance voice signal for voice guidance
is mainly output to the speaker closer to the driver's seat, and at the same time, the speaker
farther from the driver's seat among the first and second speakers is The audio output control
device outputs a music signal in which the left and right sounds of stereo music to be reproduced
by the stereo music reproducing device are mixed.
[0006]
As described above, at the timing at which the voice control device causes the first speaker to
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output the right audio of stereo music at the same time as the voice guidance is not performed
and at the same time the left voice is output to the second speaker, Of the speakers, the guidance
sound is mainly output to the driver's seat, thereby changing the balance between the left and
right of the music output, and at the same time, the speaker far from the driver's seat It is
designed to output voice.
[0007]
In many cases, stereo music can not ignore cases provided by monaural audio such as AM radio
broadcasting, so it is considered that the reproduced audio will not be distorted even if the right
audio and left audio are mixed into monaural audio. Has been created.
Therefore, it is unlikely that the left-right mixed sound of stereo music as described above will
cause the occupant to feel distorted.
In this way, it is possible to reduce the degree to which the music output is distorted during voice
guidance.
[0008]
Further, according to the invention as set forth in claim 2, based on the fact that the audio
guidance apparatus does not perform the audio guidance, the right audio of stereo music
reproduced by the stereo music reproducing apparatus is simultaneously outputted to the first
speaker. First control means for outputting to the second speaker the left sound of the stereo
music reproduced by the stereo music reproducing device, detection means for detecting that the
audio guidance device is at the timing of audio guidance, and the detection means Among the
first and second speakers, at the same time the guidance voice for the voice guidance is mainly
outputted to the speaker closer to the driver's seat among the first and second speakers based on
the detection of The speaker far from the driver's seat is made to output a sound obtained by
mixing the left sound and the right sound of stereo music reproduced by the stereo music
reproducing device As second controller, an audio output control program for causing a
computer to function.
[0009]
Thus, the invention according to claim 1 can be grasped as a program.
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[0010]
Hereinafter, an embodiment of the present invention will be described.
FIG. 1 shows a configuration diagram of an audio output system mounted in a vehicle in the
present embodiment.
This voice output system comprises a vehicle navigation device 1, an audio device 2, a voice
output control device 3, a driver side speaker 4, and a passenger side speaker 5.
In the present embodiment, it is assumed that the right-hand drive vehicle is equipped with an
audio output system. Therefore, the driver's seat side speaker 4 is attached near the front seat
right side seat, and the front passenger's seat side speaker 5 is attached near the front seat left
side seat. In the present embodiment, as described in detail below, when the vehicle navigation
device 1 performs voice guidance during stereo music reproduction by the audio device 2, only
the guidance voice is output from the driver's seat side speaker 4, and the passenger seat The
side speaker 5 outputs only the sound in which the sound of the right channel and the left
channel of stereo music is mixed.
[0011]
The vehicle navigation device 1 has a position detector 11, an operation switch group 12, an
image display device 13, a navigation sound output unit 14, an external storage medium 15, a
RAM 16, a ROM 17, and a control circuit 18.
[0012]
The position detector 11 has sensors such as a vehicle speed sensor and a GPS receiver, and
outputs information for specifying the current position and direction of the vehicle to the control
circuit 18 based on the properties of each of these sensors. .
The operation switch group 12 includes an input device such as a mechanical switch or a touch
panel. The navigation voice output unit 14 converts voice data received from the control circuit
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18 into an analog voice signal (hereinafter referred to as a guidance voice signal) and outputs the
voice data to the voice output control device 3. The external storage unit 18 includes a nonvolatile storage medium such as a DVD, a CD, and an HDD, and an apparatus for reading (and
writing if possible) data to the storage medium, and a program read and executed by the control
circuit 18 , Map data for route guidance, etc. are stored.
[0013]
The control circuit 18 executes a program for the operation of the vehicle navigation device 1
read out from the ROM 17 and the external storage medium 15, and reads out information from
the RAM 16, the ROM 17 and the external storage medium 15 when it is executed. / Operates by
controlling writing. Specifically, the control circuit 18 receives an input of a destination by the
user from the operation switch group 12 and calculates an optimal guidance route from the
current position specified based on the signal from the position detector 11 to the destination
Output an image in which the guidance route, the destination, the current position, etc. are
superimposed on the map indicated by the map data to the image display device 13 and turn
right when the own vehicle has arrived in front of the guidance intersection The guidance voice
data for instructing left turn, etc. is output to the navigation voice output unit 14. The control
circuit 18 outputs a predetermined voice guidance output start signal to the voice output control
device 3 immediately before outputting the guidance voice data, and immediately after
outputting the guidance voice data, the predetermined voice guidance output end signal Are
output to the audio output control device 3.
[0014]
The audio device 2 includes an AM / FM receiver 21, a cassette player 22, a CD player 23, an MD
player 24, an operation switch group 25, an image display device 26, an audio signal output unit
27, and a control circuit 28. The control circuit 28 controls the operation of the AM / FM
receiver 21, the cassette player 22, the CD player 23, and the MD player 24 based on the content
of the user's operation on the operation switch group 25, and these AM / FM receiver 21, It
receives a digital or analog stereo music signal output from the cassette player 22, the CD player
23, and the MD player 24, and outputs the received signal to the audio signal output unit 27. The
image display device 26 displays information such as the content of control by the control circuit
28 and the name of reproduced music based on a signal from the control circuit 28. The audio
signal output unit 27 outputs the analog or digital audio signal received from the control circuit
28 to the audio output control device 3 as an analog signal of two systems of an R (right) channel
audio signal and an L (left) channel audio signal. Output.
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[0015]
The audio output control device 3 includes an audio mixing unit 31, a driver seat side speaker
switch 32, a passenger seat side speaker switch 33, a sound source switching unit 34, an
amplifier 35, and an amplifier 36.
[0016]
The audio mixing unit 31 mixes the R channel audio signal and the L channel audio signal output
from the audio signal output unit 27 of the audio apparatus 2 and outputs a monaural signal of
the result of the mixing to the passenger seat side speaker switch 33 .
The mix ratio may be 1: 1, or may be another ratio that does not greatly deviate from 1: 1. The
monaural signal output by the audio mixing unit 31 is hereinafter referred to as a mixed music
signal.
[0017]
The driver's seat side speaker switch 32 includes an R channel terminal 32a, a navigation
terminal 32b, and an output side terminal 32c, and based on the switching signal from the sound
source switching unit 34, the output side terminal 32c is an R channel terminal 32a or a
navigation terminal. Connect to one of 32b. When the R channel terminal 32 a and the output
side terminal 32 c are connected, the R channel audio signal from the audio signal output unit 27
is input to the amplifier 35. When the navigation terminal 32 b and the output terminal 32 c are
connected, the guidance voice signal from the navigation voice output unit 14 is input to the
amplifier 35.
[0018]
The passenger's seat side speaker switch 33 includes an L channel terminal 33a, a mix terminal
33b, and an output side terminal 33c, and the output side terminal 33c is an L channel terminal
33a or a mix terminal based on the switching signal from the sound source switching unit 34.
Connect to one of 33b. When the L channel terminal 33 a and the output side terminal 33 c are
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connected, the L channel audio signal from the audio signal output unit 27 is input to the
amplifier 36. When the mix terminal 33 b and the output side terminal 33 c are connected, the
mix music signal from the audio mixing unit 31 is input to the amplifier 36.
[0019]
The amplifier 35 amplifies the signal received from the driver's seat side speaker switch 32 and
outputs the amplified signal to the driver's seat side speaker 4, and the amplifier 36 has the same
degree as the amplifier 35 as the signal received from the passenger seat side speaker switch 33.
And output to the speaker 5 on the passenger side.
[0020]
The sound source switching unit 34 (corresponding to a computer) is a known microcomputer
provided with a CPU, a RAM, a ROM, an I / O, etc., which are not shown.
Then, the CPU always executes the program stored in the ROM. FIG. 2 shows a flowchart of the
voice output control program 100 executed by the CPU.
[0021]
In the execution of the audio output control program 100, the CPU of the sound source switching
unit 34 first switches the switches 32 and 33 for stereo output at step 110. Specifically, the
driver's seat side speaker switch 32 is controlled so that the R channel terminal 32a and the
output side terminal 32c are connected, and the passenger seat side speaker switch 33 is
provided with the L channel terminal 33a and the output side terminal It controls so that 33c is
connected.
[0022]
Subsequently, in step 120, the process waits until the vehicle navigation device 1 detects that
voice guidance is to be started, that is, until it receives a voice guidance output start signal from
the control circuit 18, and detects voice guidance start. Run.
[0023]
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At step 130, the switches 32, 33 are switched for guidance / monaural output.
Specifically, the driver's seat side speaker switch 32 is controlled so that the navigation terminal
32b and the output side terminal 32c are connected, and the passenger seat side speaker switch
33 is provided with the mix terminal 33b and the output side terminal 33c. Control to be
connected.
[0024]
Subsequently, in step 140, the process waits until detection of the end of voice guidance by the
vehicle navigation device 1, that is, until reception of a voice guidance output end signal from the
control circuit 18 is detected. Run.
[0025]
When the CPU executes the voice output control program 100 as described above, the sound
source switching unit 34 immediately after the activation of the sound source switching unit 34
or when the end of the voice guidance by the vehicle navigation device 1 is detected (step 140)
(Refer to the above), that is, when it is not the timing to perform voice guidance, to output the R
channel audio of stereo music reproduced by the audio device 2 to the driver's seat side speaker
4 and simultaneously output the L channel The driver's side speaker switch 32 and the
passenger's side speaker switch 33 are controlled (see step 110).
Further, when the sound source switching unit 34 detects the start of voice guidance by the
vehicle navigation device 1 (see step 120), based on the detection, only the guidance voice from
the vehicle navigation device 1 is transmitted to the driver's seat side speaker 4 The driver's side
speaker switch 32 and the passenger's side speaker switch 33 are controlled so that the
monaural music in which the R channel sound and the L channel sound are mixed is output to
the front passenger side speaker 5 at the same time as the output. See 130).
[0026]
By such operation of the voice output control device 3, while the voice guidance by the vehicle
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navigation device 1 is not performed, the R channel voice signal of stereo music is output to the
driver's seat side speaker 4, and the passenger's seat side speaker 5 L channel audio signal is
output to Further, while the voice guidance by the vehicle navigation device 1 is being
performed, only the guidance voice signal is output to the driver's seat side speaker 4 so that the
balance of the music output on the left and right is changed. Only a monaural music signal, in
which the R channel audio signal and the L channel audio signal are mixed, is output.
[0027]
In many cases, stereo music can not be ignored when it is provided in monaural such as AM
radio broadcast, so it is created in consideration that the reproduced audio will not be distorted
even if the right audio and left audio are mixed into monaural. It is done. Therefore, it is unlikely
that the left-right mixed sound of stereo music as described above will cause the occupant to feel
distorted. In this way, it is possible to reduce the degree to which the music output reproduced
by the audio device 2 becomes distorted during voice guidance. Further, since only the guidance
voice is output by the speaker 4 closer to the driver's seat, the driver can easily hear the
guidance voice.
[0028]
The sound output control device 3 is configured such that a popping sound (shock sound) is not
output to the speakers 4 and 5 when the switches 32 and 33 are switched by the sound source
switching unit 34. In order to realize this configuration, for example, as the switch 32 for the
driver's seat side speaker and the switch 33 for the front passenger's seat side speaker, a switch
that suppresses generation of a pop noise may be used. Further, the amplification factor may be
reduced to near zero amplification factor of the amplifier 35 and the amplifier 36 immediately
before switching by the sound source switching unit 34, and the amplification factor may be
restored immediately after switching.
[0029]
In the above embodiment, the vehicle navigation device 1 corresponds to a voice guidance
device, the audio device 2 corresponds to a stereo music reproduction device, the driver's seat
side speaker 4 corresponds to a first speaker, and the passenger's seat side The speaker 5
corresponds to a second speaker. Further, the CPU of the sound source switching unit 34
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executes step 110 of the voice output control program 100 to function as a first control unit, and
executing step 120 functions as a detection unit to execute step 130. Function as a second
control unit.
[0030]
Other Embodiments The embodiments of the present invention have been described above, but
the configuration of the present invention is not limited to the above embodiments, and various
functions that can realize the functions of the components of the present invention can be
realized. It includes the form.
[0031]
For example, in the above embodiment, only the monaural music mixed with the passenger side
speaker 5 is output at the time of voice guidance, but the guidance sound is output from the
passenger side speaker 5 together with the monaural music It may be
[0032]
Further, although the driver's seat side speaker 4 outputs only the guide voice, monaural music
mixed with the guide voice may be outputted from the driver's seat side speaker 4.
However, it is necessary for the guidance voice to occupy the main part of the outputted voice
(for example, 60% or more in average sound pressure).
[0033]
Further, in the above embodiment, the driver's seat side speaker 4 mainly outputs the guidance
voice at the time of voice guidance, and the assistant's seat side speaker 5 outputs monaural
music, but this is not always the case. It is good.
For example, when there are speakers on the left and right of the rear seat, at the time of voice
guidance, the guidance voice is output to the speaker on the rear right side (left side in the case
of left-hand drive car). The speaker of may be muted. That is, the relationship between a speaker
that mainly outputs guidance voice at the time of voice guidance (hereinafter referred to as a
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guidance speaker) and a speaker that outputs monaural music mixed at the time of voice
guidance (hereinafter referred to as a mix speaker) performs voice guidance. It is sufficient if the
different sides (i.e. right or left) of the stereo music are output when not being used, and the
guidance speakers are closer to the driver's seat than the mix speakers.
[0034]
The audio apparatus 2 also has a DVD player and a TV receiver, and the control circuit 28
controls them and outputs stereo audio signals received from them to the audio signal output
unit 27. It is also good.
[0035]
Further, the control circuit 18 of the vehicle navigation device 1 reproduces stereo music data
recorded in the external storage medium 15, and R channel audio signal and L channel audio
signal based on the music data are respectively transmitted by signal lines not shown. It may
output to the R channel terminal 32a and the L channel terminal 33a.
In this case, the vehicle navigation device 1 also functions as a stereo music playback device.
[0036]
Also, the audio output control program 100 may be executed by the control circuit 18. In this
case, the determinations in steps 120 and 140 are performed based on the operation state of the
voice guidance process of one's own, and the control circuit 18 directly controls the driver seat
speaker switch 32 and the passenger seat speaker switch 33. Good. In this case, the vehicle
navigation device 1 also functions as an audio output control device.
[0037]
In addition, the navigation sound output unit 18 may be connected to the driver's seat side
speaker 4 and the passenger's seat side speaker 5 via the I / O (not shown) without passing
through the voice output control device 3. Then, when stereo audio reproduction in the external
storage medium 15 is not performed, the control circuit 18 performs the R channel audio signal
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and the L channel audio signal based on the music data in the driver's seat side speaker 4 and
the passenger's seat, respectively. When output to the side speaker 5 and voice guidance is
performed, the guidance voice signal is mainly output to the driver's seat side speaker 4, and a
signal obtained by mixing the L channel voice signal and the R channel voice signal is output to
the passenger side speaker 5 You may come to In this case, the vehicle navigation device 1 also
functions as an audio output control device and a stereo music reproduction device.
[0038]
In the above embodiment, the vehicle navigation device 1 is shown as a specific example of the
voice guidance device, but the voice guidance device is not limited to the vehicle navigation
device, and a collision warning device may be used. It may be a device or a vehicle failure
notification device. That is, the voice guidance device may be any device that notifies of some
information by voice.
[0039]
FIG. 1 is a block diagram showing a configuration of a vehicle navigation device 1, an audio
device 2, a voice control device 3, a driver's seat side speaker 4, and a passenger's seat side
speaker 5 according to an embodiment of the present invention. 7 is a flowchart of an audio
output control program 100 executed by the CPU of the sound source switching unit 34.
Explanation of sign
[0040]
DESCRIPTION OF SYMBOLS 1 ... Navigation apparatus for vehicles, 2 ... Audio apparatus, 3 ...
Audio output control apparatus, 4 ... Driver side speaker, 5 ... Passenger side speaker, 11 ...
Position detector, 12 ... Operation switch group, 13 ... Image display apparatus 14 Navigation
audio output unit 15 External storage medium 16 RAM 17 ROM 18 Control circuit 21 AM / FM
receiver 22 Cassette player 23 CD player 24 MD player Reference Signs List 25 operation switch
group 26 image display device 27 audio signal output unit 28 control circuit 31 audio mixing
unit 32 driver side speaker switch 33 front passenger side speaker switch 34 Sound source
switching unit, 35, 36: amplifier, 100: sound output control program.
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