JP2007053507

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DESCRIPTION JP2007053507
[Problem] Even if there is an incoming call during music playback, it is not necessary to remove
an earphone or the like. A volume control device 24 adjusts the volume of the R output of the
music reproduction device 12 between the speaker 22 of the headphone 10 and the R output of
the music reproduction device 12 according to the approach of the portable terminal 14.
Connecting. An RFID tag reader 26 is connected to the volume control device 24. When the RFID
tag reader 26 detects the RFID tag 16 attached to the portable terminal 14, the volume control
device 24 reduces the volume of the R output of the music reproduction device 12 according to
the output of the RFID tag reader 26. [Selected figure] Figure 1
Voice output device
[0001]
The present invention relates to a portable audio output device such as a headphone or an
earphone, and more particularly to an audio output device capable of listening to a call voice
from a portable terminal without having to remove the speaker unit from the ear.
[0002]
In headphones and earphones, the sound of the outside world is cut off, although it may be
partially leaked.
Recently, products with high sound insulation performance have been commercialized so that
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almost no external sound can be heard. This type of audio output device is used to listen to the
playback music of a portable music playback device on the go.
[0003]
With the spread of mobile phones, there are often incoming calls while watching music. When
listening to the playback sound of the portable music playback device with headphones or
earphones and receiving an incoming call to the mobile phone, it is necessary to keep the
headphones etc. away from the ear to hear the voice from the other party. Even sound-insulated
earphones must at least mute or turn off the portable music player output.
[0004]
An object of the present invention is to present a voice output device capable of hearing a voice
from the other party of a portable terminal without such a complicated operation.
[0005]
A voice output device according to the present invention includes a voice input terminal, a
speaker, an approach detecting means for detecting the approach of the portable terminal, and a
detection result indicating the approach of the portable terminal of the approach detecting
means, the voice input terminal And sound volume reducing means for reducing the level of the
audio signal to the speaker.
[0006]
The audio output device according to the present invention combines the audio input terminal,
the microphone, the speaker, the audio signal from the audio input terminal, and the output
audio signal of the microphone at a specified synthesis ratio, and outputs the synthesized signal
to the speaker The audio signal level from the audio input terminal to the speaker is reduced
according to the device, approach detection means for detecting the approach of the portable
terminal, and the detection result indicating the approach of the portable terminal of the
approach detection means, and the microphone And a controller for controlling the designated
combining ratio of the synthesizer so as to output the output audio signal of the speaker from the
speaker.
[0007]
According to the present invention, it is possible to hear the voice of the other party of
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communication without any troublesome operation even if the mobile terminal receives an
incoming call while listening to the playback music etc. of the portable music playback device.
[0008]
Hereinafter, embodiments of the present invention will be described in detail with reference to
the drawings.
[0009]
FIG. 1 is a schematic configuration diagram showing the relationship among a headphone 10, a
music reproduction device 12, and a portable terminal 14 according to an embodiment of the
present invention.
The mobile terminal 14 is, for example, a mobile phone, and includes a microphone 14a and a
speaker 14b for conversation with a calling party.
Further, an RFID tag 16 is attached to the portable terminal 14 for the purpose of detecting the
approach of the headphone 10 to the speaker 22.
[0010]
The headphone 10 has two speakers 20, 22 corresponding to stereo.
One speaker 20 is connected to one output (in the illustrated example, an L signal) of stereo
sound of the music reproduction device 12.
Between the other speaker 22 and the R output of the music reproduction device 12, a volume
control device 24 for adjusting the volume of the R output of the music reproduction device 12 is
connected according to the approach of the portable terminal 14.
Of course, a volume control device having the same function as the volume control device 24
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may be connected to the speaker 20 as well. Whether the volume control device 24 is connected
to which speaker 20, 22 depends on which ear the user wishes to hear the audio from the
portable terminal 14. In this regard, it is convenient for the volume control 24 to be removable
from the speaker 22.
[0011]
An RFID tag reader 26 is connected to the volume control device 24. The RFID tag reader 26 is
provided to detect the RFID tag 16 bonded to the portable terminal 14. The RFID tag reader 26 is
set to detect when the tag 16 approaches a distance of several centimeters.
[0012]
FIG. 2 shows a schematic block diagram of the volume control device 24. As shown in FIG. The
volume control device 24 includes an audio input terminal 30 to which the R output signal of the
music reproduction device 12 is input. The output of the RFID tag reader 26, ie, the read result, is
applied to the control circuit 34.
[0013]
The audio signal input from the music reproduction device 12 to the audio input terminal 30 is
supplied to the speaker 22 via the variable gain amplifier 36.
[0014]
The control circuit 34 controls the gain of the variable gain amplifier 36 in accordance with the
output of the RFID tag reader 26 as follows.
When the portable terminal 14 is separated from the speaker 22 by several centimeters or more,
the controller 34 controls the gain of the variable gain amplifier 36 so that the reproduced sound
from the music reproducing device 12 is output from the speaker 22 at an appropriate volume.
Control.
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[0015]
On the other hand, it is assumed that the portable terminal 14 receives an incoming call, and the
user presses the call start button to bring the portable terminal 14 close to the ear near the
speaker 22. Of course, the voice from the other party is output as a voice from the speaker 14 b
of the portable terminal 14. The RFID tag reader 26 detects the RFID tag 16 bonded to the
portable terminal 14, and supplies its ID to the control device 34.
[0016]
The control device 34 makes the gain of the variable gain amplifier 36 zero according to the
input of the ID information from the RFID tag reader 26, or the reproduction music of the music
reproduction device 12 does not get in the way of listening to the voice from the other party.
Make it smaller. As a result, the user can simply reduce the reproduction volume of the audio
reproduction device 12 simply by bringing the speaker 14 b of the portable terminal 14 close to
the ear of the speaker 22 to hear the voice from the other party of the portable terminal 14. it
can.
[0017]
In order to limit such an action to a specific portable terminal 14, the ID of the RFID tag 16 to
which the portable terminal 14 adheres may be stored in the control device 34 in advance. The
controller 34 controls the gain of the variable gain amplifier 36 as described above when the
prestored ID is supplied from the RIFID tag reader 26.
[0018]
The RFID tag 16 and the RFID tag reader 26 are described as an example of a proximity sensor
that detects an approach within a predetermined distance, and it goes without saying that other
proximity sensors can be used.
[0019]
FIG. 3 is a schematic block diagram showing the relationship between the headphone 110, the
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music reproduction device 112, and the portable terminal 114 in the second embodiment of the
present invention.
The portable terminal 114 is, for example, a portable telephone, and includes a microphone 114a
and a speaker 114b for conversation with the other party. Further, an RFID tag 116 is attached
to the portable terminal 114 for the purpose of detecting the approach of the headphone 110 to
the speaker 122.
[0020]
The headphone 110 has two speakers 120, 122 corresponding to stereo. One speaker 120 is
connected to one output (in the illustrated example, an L signal) of stereo sound of the music
reproduction device 112. Between the other speaker 122 and the R output of the music
reproduction device 112, a volume control device 124 for adjusting the volume of the R output
of the music reproduction device 112 is connected according to the approach of the portable
terminal 114. The volume control device 124 further has a function of capturing the sound from
the portable terminal 114 and supplying it to the speaker 122. Of course, a volume control
device having the same function as the volume control device 124 may be connected to the
speaker 120 as well. Whether the volume control device 24 is connected to which speaker 120,
122 depends on which ear the user wishes to hear the audio from the portable terminal 114. In
this regard, the volume control 124 is conveniently removable from the speaker 122.
[0021]
An RFID tag reader 126 and a microphone 128 are connected to the volume control device 124.
The RFID tag reader 126 is provided to detect the RFID tag 116 bonded to the portable terminal
114, and the microphone 128 is provided to capture sound from the speaker 114b of the
portable terminal 114 that has approached. The RFID tag reader 126 is set to detect when the
tag 116 approaches a distance of several centimeters.
[0022]
FIG. 4 shows a schematic block diagram of the volume control device 124. As shown in FIG. The
volume control device 124 includes an audio input terminal 130 to which the R output signal of
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the music reproduction device 112 is input, and a microphone input terminal 132 to which the
microphone 128 is connected. The output of the RFID tag reader 126, ie, the read result, is
applied to the control circuit 134.
[0023]
The audio signal input from the music reproduction device 112 to the audio input terminal 130
is input to the variable gain amplifier 136. The output sound signal of the microphone 128 is
input to the variable gain amplifier 138 via the microphone input terminal 132. The mixer 140
mixes the output sound signals of the variable gain amplifiers 136 and 138, and outputs the
mixed sound signal to the speaker 122.
[0024]
The control circuit 134 controls the gains of the variable gain amplifiers 136 and 138 in
accordance with the output of the RFID tag reader 126 as follows. When the portable terminal
114 is separated from the speaker 122 by several centimeters or more, the controller 134 makes
the gain of the variable gain amplifier 138 zero, and the reproduced sound from the music
reproducing device 112 is output from the speaker 122 at an appropriate volume. The gain of
the variable gain amplifier 136 is increased to the extent that
[0025]
On the other hand, it is assumed that the portable terminal 114 receives a call and the user
presses the call start button to bring the portable terminal 114 close to the speaker 122. At this
time, the voice from the other party is output as a voice from the speaker 114 b of the portable
terminal 114. The RFID tag reader 126 detects the RFID tag 116 bonded to the portable terminal
114 and supplies its ID to the controller 134.
[0026]
The controller 134 increases the gain of the variable gain amplifier 138 and decreases the gain
of the variable gain amplifier 136 according to the input of the ID information from the RFID tag
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reader 126. That is, the control device 134 makes the gain of the variable gain amplifier 136
zero or reduces the reproduction music of the music reproduction device 112 so as not to disturb
the voice from the other party. Conversely, the controller 134 increases the gain of the variable
gain amplifier 138 to such an extent that the sound output from the speaker 114 b of the
portable terminal 114 and picked up by the microphone 128 can be clearly heard from the
speaker 126. As a result, the reproduction volume of the audio reproduction device 112 is
reduced, and the user can automatically hear the voice from the other party of the portable
terminal 114 through the speaker 122 simply by bringing the portable terminal 114 close to the
speaker 122. .
[0027]
When such an action is limited to a specific portable terminal 114, the ID of the RFID tag 116
attached to the portable terminal 114 may be stored in the control device 134 in advance. The
controller 134 raises the gain of the variable gain amplifier 138 and lowers the gain of the
variable gain amplifier 136 as described above when the prestored ID is supplied from the RIFID
tag reader 126.
[0028]
The RFID tag 116 and the RFID tag reader 126 are described as an example of a proximity
sensor that detects an approach within a predetermined distance, and it goes without saying that
other proximity sensors can be used.
[0029]
A third embodiment of the present invention will be described.
FIG. 5 shows a schematic block diagram of the whole, and FIG. 6 shows a schematic block
diagram of the volume control device 124a. The same components as those in the embodiment
shown in FIGS. 3 and 4 are designated by the same reference numerals.
[0030]
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The portable terminal 150 includes a light emitting element (for example, a light emitting diode)
150c that generates an optical signal indicating a communication state, in addition to the
microphone 150a and the speaker 150b for calling. A light receiving element 152 is connected
to the volume control device 124 a of the headphone 110 a instead of the RFID tag reader 126.
[0031]
In the present embodiment, a light emitting element 150 c and a light receiving element 152 are
used instead of the RFID tags 16 and 116 and the RFID tag readers 26 and 126 as means for
detecting the approach of the portable terminal.
[0032]
The modified part of this embodiment will be described.
The light emitting element 150c of the portable terminal 150 lights up or blinks in a call state, or
generates an optical signal for carrying the unique identification information of the portable
terminal 150a. The light receiving element 152 receives the light from the light emitting element
150c, converts it into an electric signal, and supplies the electric signal to the control device
134a of the volume control device 124a. The controller 134 a controls the variable gain
amplifiers 136 and 138 in the same manner as the controller 134 in accordance with the output
of the light receiving element 152.
[0033]
That is, when the output electric signal level of the light receiving element 152 is less than the
predetermined value, the controller 134a makes the gain of the variable gain amplifier 138 zero,
and the reproduced sound from the music reproducing device 112 is output from the speaker
122 at an appropriate volume. The gain of the variable gain amplifier 136 is increased to a
certain extent. On the other hand, when the output electrical signal level of the light receiving
element 152 is equal to or higher than the predetermined value, the controller 134a raises the
gain of the variable gain amplifier 138 and lowers the gain of the variable gain amplifier 136.
[0034]
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When it is desired to operate the volume control device 124 a for a specific portable terminal
150, the light emitting element 150 c generates an optical signal that carries an identification
signal that identifies the portable terminal 150. The light receiving element 152 converts the
light signal from the light emitting element 150c into an electric signal, and supplies the electric
signal to the control device 134a. The controller 134a raises the gain of the variable gain
amplifier 138 and lowers the gain of the variable gain amplifier 136 only when the output signal
of the light receiving element 152 carries the identification signal of the specific portable
terminal registered in advance.
[0035]
Also in the present embodiment, as in the case of the second embodiment, the user can
automatically listen to the voice from the other party of the portable terminal 150 with the
speaker 122 simply by bringing the portable terminal 150 close to the speaker 122. it can.
[0036]
Although the invention has been described with reference to specific illustrative embodiments,
various modifications and alterations may be made to the embodiments described above without
departing from the technical scope of the invention as defined in the claims. These are obvious to
those skilled in the art to which the present invention belongs, and such modifications and
alterations are included in the technical scope of the present invention.
[0037]
It is a schematic block diagram which shows the relationship between 1st Example of this
invention, a music reproducing apparatus, and a portable terminal.
FIG. 2 is a schematic block diagram of a volume control circuit 24.
It is a schematic block diagram which shows the relationship between 2nd Example of this
invention, a music reproducing apparatus, and a portable terminal. FIG. 2 is a schematic block
diagram of a volume control circuit 124. It is a schematic block diagram which shows the
relationship between 3rd Example of this invention, a music reproducing apparatus, and a
portable terminal. It is a schematic block diagram of volume control circuit 124a.
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Explanation of sign
[0038]
10: Headphones 12: Music playback device 14: Mobile terminal 14a: Microphone 14b: Speaker
16: RFID tag 20, 22: Speaker 24: Volume control device 26: RFID tag reader 30: Audio input
terminal 34: Control device 36: Variable gain amplifier 110, 110a: Headphones 112: Music
playback device 114: Mobile terminal 114a: Microphone 114b: Speaker 116: Light emitting
element 120, 122: Speaker 124, 124a: Volume control device 126: RFID tag reader 128:
Microphone 130: Voice input terminal 132: Microphone input terminal 134, 134a: Control
device 136, 138: Variable gain amplifier 140: Mixer 150: Mobile terminal 150a: Microphone
150b: Speaker 150c: Light emitting element 152: Light receiving element
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