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JP2003143253

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
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DESCRIPTION JP2003143253
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
bone conduction microphone, an interactive terminal equipped with a bone conduction speaker,
a call control method thereof, and a program thereof.
[0002]
2. Description of the Related Art Conventionally, a receiver using bone conduction has been used
for the hearing impaired and elderly people. The terminal using bone conduction converts the
voice converted from the other party's terminal into an electrical signal and transmitted to
vibration. When a user of a terminal using bone conduction applies the speaker (vibration unit)
of the terminal to his / her skull, vibration is transmitted to the cochlea through the skull.
Therefore, even if the external ear is impaired, the voice can be transmitted to the brain without
passing through the affected area.
[0003]
By the way, in recent years, portable telephones have exploded and it has become possible to
make calls as long as they are not out of range under any circumstances. Therefore, although it is
possible to make calls even in the bustle of downtown areas, the conventional interactive
terminal device such as a mobile phone is difficult for the speaker to hear the other party's voice
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1
when the surroundings are crowded, such as inside a crowd Not only that, but because it utters
at a loud volume to counter it, it was also annoying around. In addition, the other party was also
to hear voice mixed noise, it was difficult to hear.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of the above
circumstances, and it is an object of the present invention to provide an interactive terminal
device that is resistant to ambient noise and realizes a talk environment easy to hear, a call
control method thereof, and a program thereof.
[0005]
In addition, the present invention enables user-friendly interactive operation by enabling the user
to select a mode using bone conduction microphones and bone conduction speakers and a mode
using normal microphones and normal speakers in consideration of a call environment. An object
of the present invention is to provide a terminal device, a call control method thereof, and a
program thereof.
[0006]
SUMMARY OF THE INVENTION In order to achieve the above object, the invention according to
claim 1 is directed to a bone conduction microphone for picking up speech vibration from the
skull of a speaker and converting it into a transmission speech signal, and a network. A wireless
means for transmitting a transmitted voice signal and receiving a received voice signal from the
network; a bone conduction speaker for converting a received voice signal received by the
wireless means into voice vibration and conducting it to the speaker's skull; It has a normal
microphone for picking up the peripheral voice, a phase inverting circuit for inverting the phase
of the peripheral audio taken by the normal microphone, and a normal speaker for outputting the
peripheral audio inverted in phase by the phase inverting circuit as the noise neutralization audio
It is characterized by
[0007]
The invention according to claim 2 further comprises a signal subtraction circuit for subtracting
a received speech signal conducted by the bone conduction speaker from a speech transmission
signal outputted from the bone conduction microphone according to the invention according to
claim 1; The wireless means is characterized in that it transmits the transmission voice signal
subtracted by the signal subtraction circuit.
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2
[0008]
According to the third aspect of the present invention, in the first or second aspect, the reception
voice received by the wireless means is switched to output to the bone conduction speaker or to
the normal speaker by switching operation of the speaker. It is characterized by further having
an output switching means.
[0009]
According to a fourth aspect of the present invention, in the third aspect of the present invention,
the input / output switching means comprises a transmission voice signal picked up by the bone
conduction microphone according to the switching operation of the speaker and surrounding
voice and speech collected by the normal microphone. It is characterized in that which one of the
transmission voice signals including the user voice and the voice of the person is to be sent to the
network through the wireless means.
[0010]
According to the fifth aspect of the present invention, there is provided a transmitting step of
picking up voice vibration from the skull of a speaker by a bone conduction microphone,
converting it into a sending voice signal, and sending it to a network, and receiving a receiving
voice signal from the network. A call control method of an interactive terminal device comprising:
a reception step of converting sound vibration into sound vibration and transmitting the sound
vibration to a speaker's skull through a bone conduction speaker, and collecting surrounding
sound of the speaker by a normal microphone Noise-neutralized voice that outputs the peripheral
voice that is phase-reversed in the peripheral sound collected from the peripheral voicecollection step, the phase-reversal phase that reverses the phase in the phase-reversal step as the
noise-neutralized voice And an output process.
[0011]
The invention according to claim 6 further includes a signal subtraction step of subtracting the
reception voice signal conducted by the bone conduction speaker from the transmission voice
signal outputted from the bone conduction microphone in the invention according to claim 5,
The transmitting step is characterized by transmitting a transmitting voice signal subtracted by
the signal subtracting step.
[0012]
The invention according to claim 7 is the input according to the invention according to claim 5 or
6, in which the receiving voice received in the receiving step is switched to output to the bone
conduction speaker or to the normal speaker by the switching operation of the speaker. It is
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characterized by further having a switching process.
[0013]
The invention according to claim 8 is the invention according to any one of claims 5 to 7,
wherein a transmission voice signal picked up by the bone conduction microphone by the
switching operation of the speaker and a peripheral voice collected by the normal microphone
The present invention is characterized by further comprising an output switching step of
switching which one of the transmission voice signal including the voice and the speaker voice is
to be sent to the network by the sending step.
[0014]
The invention according to claim 9 picks up voice vibration from the skull of the speaker by the
bone conduction microphone, converts it into a sending voice signal, sends it to the network, and
receives a receiving voice signal from the network. And a call control program of an interactive
terminal device that causes a computer to execute reception processing for converting sound
vibration into sound vibration and conducting the sound vibration to the speaker's skull through
a bone conduction speaker, and the surrounding sound of the speaker using a normal
microphone Noise for processing surrounding sound collection processing to collect the sound,
phase inversion processing for phase inversion of the surrounding sound collected by the
peripheral sound collection processing, and surrounding sound that is phase-reversed by the
phase inversion processing from the normal speaker as noise neutralization sound It is
characterized in that the computer is caused to execute neutralization voice output processing.
[0015]
According to a tenth aspect of the present invention, in the computer according to the ninth
aspect, the computer further executes signal subtraction processing for subtracting a reception
voice signal conducted by the bone conduction speaker from a transmission voice signal output
from the bone conduction microphone. The transmission process is characterized by transmitting
a transmission voice signal subtracted by the signal subtraction process.
[0016]
The invention according to claim 11 is the input according to the invention according to claim 9
or 10, which switches whether the reception voice received by the reception processing is output
to the bone conduction speaker or the normal speaker according to the switching operation of
the speaker It is characterized in that the computer is further caused to execute switching
processing.
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[0017]
In the invention according to claim 12, in the invention according to any one of claims 9 to 11, a
transmission voice signal picked up by a bone conduction microphone by switching operation of
a speaker, and peripheral voice collected by a normal microphone It is characterized in that the
computer is further caused to execute output switching processing for switching which one of
the transmission voice signals including the voice and the speaker voice is to be sent to the
network by the voice transmission processing.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present
invention will be described in detail with reference to the attached drawings.
[0019]
FIG. 1 is a block diagram showing the configuration of the interactive terminal in the
embodiment of the present invention.
The interactive terminal device includes a bone conduction microphone 10, a bone conduction
speaker 20, a signal subtraction circuit 30, a phase inversion circuit 40, an input / output switch
50, a wireless device 60, a normal microphone 70, and a normal speaker 80.
[0020]
The interactive terminal device is a portable telephone, a PHS, or a PDA equipped with a
communication means.
In addition to these, it is also applicable to a head part as an information input / output terminal
such as a transceiver and a computer, and a bi-directional compatible device such as a helmet in
which they are incorporated.
[0021]
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5
The bone conduction microphone 10 picks up voice vibration from the skull of the speaker, and
converts the picked up voice vibration into an electrical transmission voice signal.
Then, the transmission voice signal is output to the signal subtraction circuit 30.
The bone conduction speaker 20 converts the received voice signal from the input / output
switch 50 into voice vibration and transmits the voice vibration to the skull of the speaker.
At the same time, the reception voice signal from the input / output switch 50 is output to the
signal subtraction circuit 30.
The arrangement of the bone conduction microphone 10 and the bone conduction speaker 20 on
the housing may be anywhere as long as it can contact the skull.
[0022]
The signal subtraction circuit 30 subtracts the reception voice signal input from the bone
conduction speaker 20 from the transmission voice signal input from the bone conduction
microphone 10.
This is a process to prevent voice vibration generated from the bone conduction speaker 20 from
being re-input to the bone conduction microphone 10 and interference amplification between the
voice vibration and the voice vibration from the speaker's skull to cause howling. .
The signal subtraction circuit 30 outputs the transmission voice signal after the subtraction
process to the input / output switch 50.
[0023]
The normal microphone 70 is a microphone generally used conventionally, and functions
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particularly in the present invention to collect peripheral sound (noise).
The normal microphone 70 outputs the collected audio signal to the phase inverting circuit 40
and the input / output switch 50.
[0024]
The phase inverting circuit 40 inverts the phase of the audio signal input from the normal
microphone 70.
The inverted audio signal is output to the normal speaker 80.
Moreover, although the arrow is not described in FIG. 1, an inverted audio signal may be output
to the bone conduction speaker 20.
In that case, the bone conduction speaker 20 synthesizes and outputs the voice signal and the
reception voice signal input from the phase inverting circuit 40.
[0025]
The input / output switching circuit 50 selectively switches the transmission voice signal input
from the signal subtraction circuit 30 and the transmission voice signal input from the normal
microphone 70 according to a user's instruction, and outputs the signal to the wireless device 60.
Further, it switches and controls whether the reception voice signal input from the wireless
device 60 is output to the bone conduction speaker 20 or to the normal speaker 80.
[0026]
The wireless device 60 transmits the transmission voice signal input from the input / output
switching device 50 to the access point via the wireless telephone network, and outputs the
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reception voice signal received from the wireless telephone network to the input / output
switching device 50.
[0027]
The normal speaker 80 outputs noise-neutralized sound obtained by inverting the peripheral
sound input from the phase inversion circuit 40.
Alternatively, it outputs a reception voice signal input from the input / output switching unit 50.
[0028]
Next, the operation (call control method) of the interactive terminal device in the embodiment of
the present invention will be described.
FIG. 2 is a flow chart for explaining the operation of the interactive terminal in the embodiment
of the present invention.
[0029]
First, the user selects whether to transmit only the speaker's voice to the other party or to
transmit the voice including the peripheral voice to the other party in consideration of the
surrounding environment (step S1).
When it is desired to transmit only the speaker voice, the bone conduction microphone 10 is
turned on (step S1 / Y). In that case, the input / output switching unit 50 selects only the sound
picked up from the bone conduction microphone 10 and ignores the sound collected from the
normal microphone 70. The wireless device 60 transmits only the speaker voice (step S2).
[0030]
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When the user transmits a voice including peripheral voice, the bone conduction microphone 10
is turned off (step S1 / N). In that case, the input / output switch 50 selects the sound collected
from the normal microphone 70, and the wireless device 60 transmits the sound signal from the
normal microphone 70 (step S3).
[0031]
Next, the user selects whether to output an audio signal received from the other party to the
bone conduction speaker 20 or to the normal speaker 80 (step S4). When outputting to the bone
conduction speaker 20, the bone conduction speaker 20 is turned on (step S4 / Y). In that case,
the input / output switch 50 outputs the received voice to the bone conduction speaker 20 (step
S5). Then, the sound obtained by inverting the phase of the surrounding sound collected from the
normal microphone 70 is output from the normal speaker 80 as a noise neutralization sound
(step S6).
[0032]
When the user wants to output the received voice to the normal speaker 80, the bone conduction
speaker 20 is turned off (step S4 / N). In that case, the input / output switch 50 outputs the
received voice to the normal speaker 80 (step S7).
[0033]
Next, specific examples of the operation (call control method) of the interactive terminal device
according to the embodiment of the present invention will be described. In the case of
conducting interactive communication between the speaker A and the speaker B, it is assumed
that the speaker A is the person using the interactive terminal device resistant to ambient noise
of the present invention. . The speaker B may be a conventional terminal device or that of the
present invention.
[0034]
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The speaker A is a call from a busy downtown area, and the area around the speaker A is noisy
due to the other person's speech and car noise. Here, in the case of the conventional terminal
device, the conversation contents of the speaker A as well as the noises thereof are collected by
the microphone, and the contents are hardly transmitted to the speaker B. In this respect, in the
case of the terminal device of the present invention, the contents can be clearly transmitted in
order to acquire only the conduction sound of the skull portion of the speaker A and transmit it
to the speaker B.
[0035]
Moreover, in the conventional terminal device, it becomes difficult to hear the voice of the other
party in the crowd. In this regard, in the case of the terminal device of the present invention, it
becomes easy to hear by transmitting voice directly to the skull of the speaker A using the bone
vibration speaker 20. At this time, if the conventional normal microphone 70 and the normal
speaker 80 are mounted in addition to the bone vibration speaker 20 and the ambient sound is
collected and the phase inverted sound is flowed from the normal speaker 80, the noise coming
from the ear is neutralized. Can hear more clearly.
[0036]
The use of the bone vibration microphone 10 of the present invention may cause a disadvantage
that peripheral sound can not be transmitted. As a means for solving this problem, a user
switching function is provided which makes it possible to easily switch between the conventional
normal microphone 70 and the bone vibrating microphone 10.
[0037]
The call control method of the present invention can be realized by executing a program. The
program is provided by being recorded on a semiconductor IC recording medium, an optical
recording medium, a magnetic recording medium, or a magneto-optical recording medium.
Alternatively, it is downloaded from the program server to the apparatus by FTP (File Transfer
Protocol) and provided.
[0038]
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The embodiment described above shows an example of a preferred embodiment of the present
invention, and the present invention is not limited thereto, and various modifications can be
made without departing from the scope of the invention. is there.
[0039]
As is apparent from the above description, the provision of the bone vibration microphone and
the bone vibration speaker enables clear transmission of voice information without worrying
about ambient noise, and also makes it easy to hear voice information from the other party.
[0040]
In addition, the user can select the mode using the bone conduction microphone and the bone
conduction speaker and the mode using the normal microphone and the normal speaker in
consideration of the call environment, which is convenient for use.
[0041]
In addition, since the bone vibration speaker transmits the vibration of the skull and transmits
the sound, it is easy to hear even when having a disability such as deafness.
[0042]
Furthermore, in an interactive terminal such as a mobile phone, the restriction that the speaker
must be placed around the ear and the microphone must be placed around the mouth, which also
has the feature that the design and shape of the device are significantly increased.
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