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JPH09191259

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Notice
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
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH09191259
[0001]
The present invention relates to an audio reproducing apparatus for reproducing audio based on
an audio signal obtained by demodulating a received signal from a receiver according to audio
input through a microphone body. The present invention relates to a wireless transmission
device having a function of wirelessly transmitting a formed carrier voice signal to be received by
a receiver in a voice reproduction device.
[0002]
2. Description of the Related Art A recording medium such as a magnetic tape (cassette tape) or a
compact disc (CD) housed in a tape cassette is mounted, and an information signal recorded in
the mounted recording medium is supplied from an attached speaker. A so-called "Karaoke
System" in which a reproduction accompaniment sound based on a sound signal obtained by
reading from a recording medium and a reproduction sound based on a sound signal
corresponding to a sound input through a microphone are superimposed and emitted. Electronic
devices called "etc." are widely used.
[0003]
Such an electronic apparatus called "Karaoke system" or the like is usually recorded on a
recording medium loading unit, for example, a recording medium loading unit such as a CD, from
the recording medium loaded on the recording medium loading unit. An information reading unit
that reads an information signal, an audio signal reproduction unit that reproduces an audio
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signal from an information signal read from a recording medium, an audio output unit that
includes a speaker system that obtains reproduction accompaniment sound based on the
reproduced audio signal And an audio reproduction apparatus provided with an external audio
input unit, and a microphone apparatus connected to the external audio input unit provided in
the audio reproduction apparatus via a microphone code forming a signal line. Be done.
Then, when the device main body and the microphone device are put into operation, the audio
output unit of the audio reproduction device includes an audio signal reproduced from the
recording medium obtained from the audio signal reproduction unit and a microphone connected
to the external audio input unit. The audio input signal obtained through the device is mixed, and
the synthesized audio signal obtained thereby is supplied to the speaker system to be obtained
through the microphone device from the speaker system to a reproduced accompaniment sound
based on the audio signal reproduced from the recording medium. The mixed sound obtained by
superimposing the reproduced sound based on the sound input signal being emitted is emitted.
[0004]
Under such circumstances, the audio playback device is dedicated to an electronic device called
"Karaoke system" or the like, and the function of the radio receiver and the cassette tape or CD
are loaded from the cassette tape or CD. An electronic device (a cassette tape recorder with a
radio or a CD player with a radio) or the like may be considered to have both the function of a
cassette tape recorder or a CD player that obtains reproduced sound based on the reproduced
audio signal. is there. When the audio reproduction device is dedicated to an electronic device
called "Karaoke system" or the like, the audio reproduction device is further made relatively large
by combining with an image display device or the like. In many cases where the audio
reproduction apparatus is a cassette tape recorder with a radio or a CD player with a radio, the
audio reproduction apparatus is a portable type that can be easily carried and installed. It is often
done.
[0005]
As described above, an electronic device called "Karaoke system" or the like is often configured
by an audio reproduction device and a microphone device connected thereto via a microphone
cord, but the microphone device is connected via the microphone cord. It is understood that the
connection to the audio reproduction device limits the position where the microphone device can
be used within the relatively narrow range reached by the microphone cord, and that the
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microphone device is always accompanied by the microphone cord. become. As a result, the
degree of freedom of the use position of the microphone device is reduced, or a person using the
microphone device feels bothersome to the microphone cord attached to the microphone device.
Problems occur.
[0006]
Therefore, in an electronic device called a "karaoke system" or the like, the microphone device is
separated from the sound reproduction device, not connected with the sound reproduction
device and the microphone device by the microphone cord, and the microphone device and the
sound reproduction device are It has also been proposed to perform wireless transmission and
reception of audio signals between them. That is, the audio reproduction apparatus has a
function of receiving and demodulating the carrier audio signal, and the microphone apparatus
wirelessly transmits the carrier audio signal corresponding to the audio input signal.
[0007]
In such a case, the degree of freedom in the use position of the microphone device is extremely
increased, and a person using the microphone device may feel bother with the microphone cord
attached to the microphone device. It will not be done. When the audio reproduction apparatus
is, for example, a CD player with a radio, the part serving as a radio receiver in the radio CD
player receives the carrier audio signal transmitted from the microphone apparatus as it is and It
would be very convenient to be able to use it to perform the demodulation function.
[0008]
As described above, an electronic device called "Karaoke system" or the like, in which wireless
transmission and reception of an audio signal is performed between a microphone device and an
audio reproduction device is performed. In practical use, the degree of freedom of the use
position of the microphone device is increased, and the microphone device can be used at various
positions separated from the sound reproduction device. Therefore, if it is possible to remotely
control or adjust the audio reproduction device at the use position of the microphone device, a
person using the microphone device at a position remote from the audio reproduction device
can, for example, reproduce the audio from that position. The volume adjustment of the mixed
sound emitted from the audio output unit of the device can be arbitrarily performed, which is
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extremely convenient for the person using the microphone device.
[0009]
Therefore, the remote control system that has already been put to practical use in various
electronic devices is referred to as a "karaoke system" or the like in which wireless transmission
and reception of audio signals is performed between the microphone device and the audio
reproduction device. It is conceivable that a remote control signal transmission device (remote
control commander) which is applied to an electronic device and which constitutes the remote
control system is operated by a person who uses the microphone device.
[0010]
However, in such a case, the microphone device and the remote control commander, each of
which is an individual device, are provided for one audio reproduction device, which makes
management of the microphone device and the remote control commander cumbersome. Also,
the user of the microphone device is required to operate the remote control commander in
addition to the microphone device, and is therefore required to handle two separate devices, the
microphone device is used The burden on the person who
[0011]
In view of such a point, the present invention relates to, for example, a microphone device in an
electronic apparatus called "Karaoke system" or the like in which wireless transmission and
reception of an audio signal is performed between the microphone device and the audio
reproduction device. In this case, without separately providing a remote control commander for
remote control or remote adjustment to the audio reproduction apparatus, the burden on the
user of the microphone apparatus becomes excessive. To provide a wireless transmission device
that can be performed reliably.
[0012]
According to the present invention, there is provided a wireless transmitting apparatus
comprising: a carrier signal receiving unit for reproducing an audio based on an audio signal
obtained by demodulating a received signal from a carrier signal receiving unit; A wireless
microphone unit for wirelessly transmitting a carrier voice signal formed in response to voice
input through the microphone body, and an operation unit, and forming a remote control signal
according to the operation of the operation unit; It has a wireless remote control unit that
transmits signals wirelessly to perform operation control on the audio reproduction device, and a
common case member that accommodates both the wireless microphone unit and the wireless
remote control unit in a state where they partially face the outside. Is configured.
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[0013]
Further, in an example of the wireless transmission device according to the present invention,
both the wireless microphone unit and the wireless remote control unit are supplied with power
supply voltage from a commonly provided power supply unit and operated, and the wireless
remote control unit The wireless transmission of the carrier voice signal by the wireless
microphone unit is caused to be stopped when the remote control signal is put into operation for
wirelessly transmitting the remote control signal.
[0014]
In the wireless transmission device according to the present invention thus configured, the
wireless microphone unit and the wireless remote control unit are accommodated in one case
member.
The wireless microphone unit wirelessly transmits a carrier voice signal formed according to the
voice input through the microphone body, and the wireless remote control unit controls the
remote control signal according to the operation of the operation unit. The remote control signal
is wirelessly transmitted to control the operation of the audio playback device.
[0015]
Therefore, the wireless transmission device according to the present invention includes the
wireless microphone unit, for example, a "karaoke system" in which wireless transmission and
reception of an audio signal is performed between the microphone device and the audio
reproduction device. It can be used to form a microphone device in an electronic device referred
to as etc. , and in that case, the wireless remote control unit remotely controls or adjusts the
sound reproduction device and separately controls the remote control commander. It will be
possible to do without providing it, and certainly without putting an excessive burden on the
person using the microphone device.
[0016]
Furthermore, in one example of the wireless transmission device according to the present
invention, both the wireless microphone unit and the wireless remote control unit are operated
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by supplying the power supply voltage from the commonly provided power supply unit. As a
result, simplification and cost reduction of the power supply voltage supply unit can be
effectively achieved.
In addition, when the wireless remote control unit is placed in the operation state of wirelessly
transmitting the remote control signal, the wireless transmission of the carrier voice signal by the
wireless microphone unit is stopped, so the wireless remote control unit is accompanied by the
wireless transmission of the remote control signal. Even when power supply voltage fluctuation
occurs, the power supply voltage fluctuation affects the wireless microphone unit sharing the
power supply unit with the wireless remote control unit, and as a result, the carrier voice signal
wirelessly transmitted from the wireless microphone unit There will be no situation in which
noise components resulting from voltage fluctuations are included.
[0017]
If it is assumed that the carrier voice signal wirelessly transmitted from the wireless microphone
unit contains noise components due to power supply voltage fluctuation, such carrier voice signal
is received by the receiver unit and is obtained as an audio signal obtained by demodulation. In
an audio reproduction apparatus for reproducing an audio based on the above, unwanted noise
sounds based on noise components contained in a carrier audio signal are mixed in the
reproduced audio, but an example of the wireless transmission apparatus according to the
present invention is used Such problems do not occur in the case of being
[0018]
2 and 3 show the appearance of an example of a wireless transmitter according to the present
invention.
This example includes, for example, both a function as an FM radio receiver and a function of a
cassette tape recorder to which a cassette tape is attached to obtain reproduced audio based on
an audio signal reproduced from the cassette tape. A microphone device is formed in an
electronic device called "Karaoke system" or the like, which is configured to include a
microphone device in addition to the audio reproduction device as well as the attached cassette
tape recorder.
[0019]
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In the example shown in FIGS. 2 and 3, the case member 10 is provided, and the case member 10
is housed with the wireless microphone unit and the wireless remote control unit partially
exposed to the outside. Common case member.
Then, on the top of the case member 10, a microphone cover 11 is attached, which covers the
microphone body included in the wireless microphone.
The lower part of the case member 10 forms a cylindrical grip 10A, and a common power supply
for supplying a power supply voltage to both the wireless microphone and the wireless remote
controller is provided inside the grip 10A. The battery to be formed is stored.
[0020]
Furthermore, a portion of the case member 10 between the microphone cover portion 11 and
the grip portion 10A forms a circuit system housing portion 10B, in which a wireless microphone
portion and a wireless remote control portion are provided. It contains the main parts of the
circuit system that composes both.
The facing surface portions 10BF and 10BR in the circuit system accommodation portion 10B
form a pair of facing side portions in the case member 10, and the wireless remote control
portion is provided to the facing surface portion 10BF which is one of the pair of facing side
portions. The operation buttons 12, 13 and 14 forming the operation portion included are
disposed in a state of facing the outside of the case member 10, and wireless remote control is
performed to the opposite surface portion 10BR which is the other of the pair of opposite side
surface portions. An infrared ray transmitting unit 15 provided in a control signal transmitting
unit in the unit is disposed in a state of facing the outside of the case member 10.
[0021]
The operation buttons 12, 13 and 14 disposed on the facing surface portion 10BF have a power
supply section in a radio cassette tape recorder in which the operation button 12 is an audio
reproducing apparatus constituting an electronic device called "Karaoke system" or the like. And
the operation button 13 is operated to reduce the volume of the sound reproduced in the
cassette tape recorder with radio set as the sound reproduction device. The operation button 14
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is used as the operation button, and the operation button 14 is used as the operation button
operated to increase the volume of the sound reproduced by the radio cassette tape recorder as
the sound reproduction device.
[0022]
Circuit housing unit 10B is operated to turn on / off the supply of power supply voltage to both
the wireless microphone unit and the wireless remote control unit from the power supply unit
formed by the battery stored inside grip unit 10A. The power on / off button 16 is also provided,
and the power on / off button 16 is operated on the facing surface portion 10BF in relation to
the power supply unit to both the wireless microphone unit and the wireless remote control unit.
A power on / off display unit 17 is provided which emits light when the supply of the power
supply voltage is performed.
Furthermore, from the grip portion 10A, a lead-line shaped antenna member 18 provided in the
wireless microphone portion extends to the outside of the case member 10.
[0023]
When one example of such a wireless transmission device according to the present invention is
actually used to form a microphone device constituting an electronic device called "Karaoke
system" or the like, the grip portion 10A is used by the user. , The opposite surface portion 10BF
on which the operation buttons 12, 13 and 14 are disposed is made to face the user, and the
opposite surface portion 10BR on which the infrared ray transmitting unit 15 is disposed is a
cassette with a radio The microphone cover portion 11 is brought close to the user's mouth by
being directed to the tape recorder.
[0024]
FIG. 1 shows the configuration of a circuit system and a power supply voltage supply section
therefor in an example of a wireless transmission device according to the present invention.
[0025]
In FIG. 1, a power supply unit 20 formed by a battery stored in the grip unit 10A of the case
member 10 shown in FIGS. 2 and 3 is a common power supply unit for the wireless microphone
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unit 21 and the wireless remote control unit 22. It is equipped as.
The power supply voltage Vb from the power supply unit 20 is supplied to both the wireless
microphone unit 21 and the wireless remote control unit 22 through the power supply switch 23
when the power supply switch 23 is turned on.
The power switch 23 selectively takes the on state and the off state in response to the operation
of the power on / off button 16 provided in the circuit system accommodating portion 10B of the
case member 10.
[0026]
In the wireless microphone unit 21, when a voice is input to the microphone main body 25 which
is covered by the microphone cover member 11 attached to the case member 10 and disposed in
the top of the case member 10, the voice is input from the microphone main body 25 An audio
input signal Sv corresponding to the voice is sent out.
The audio input signal Sv from the microphone main body 25 is amplified by the input
amplification unit 26 and supplied to the oscillation / modulation unit 27.
[0027]
The oscillation and modulation unit 27 includes an oscillation circuit unit that generates a carrier
wave signal having a predetermined frequency set in advance, and a carrier wave signal obtained
from the oscillation circuit unit according to an audio input signal Sv supplied through an input
amplification unit 26. A modulation circuit unit for modulation is incorporated. The modulation
of the carrier wave signal obtained from the oscillation circuit unit by the audio input signal Sv is,
for example, frequency modulation (FM), and in this case, the modulation circuit unit is an FM
circuit unit. Then, from the oscillation / modulation unit 27, a carrier voice signal SA is obtained,
which is an FM signal obtained by performing FM with the voice input signal Sv on the carrier
wave signal obtained from the oscillator circuit unit.
[0028]
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The carrier voice signal SA obtained from the oscillation / modulation unit 27 is amplified by the
amplifier unit 28 and then wirelessly transmitted by the voice signal transmission unit 29
through the antenna member 18 extending from the grip 10A of the case member 10 to the
outside.
[0029]
The power supply voltage Vb from the power supply unit 20 is supplied to the microphone body
25, the input amplification unit 26, the oscillation / modulation unit 27, the amplification unit
28, and the audio signal transmission unit 29 when the power switch 23 is on. The power is
supplied through the power switch 23, whereby the above-mentioned operation is performed.
Under such circumstances, the supply of the power supply voltage Vb from the power supply
unit 20 to the oscillation / modulation unit 27 through the power supply switch 23 is performed
through the switch 30. Therefore, the power switch 23 is turned on for the oscillation /
modulation unit 27, and the power supply voltage Vb is supplied from the power unit 20 when
the switch 30 is turned on.
[0030]
The wireless remote control unit 22 corresponds to the operation state of the operation buttons
12, 13 and 14 from the operation unit 31 formed including the operation buttons 12, 13 and 14
disposed on the facing surface portion 10BF of the case member 10. The control command
signals Cb, Cd and Cu are sent out and supplied to the control unit 32. The control command
signal Cb is a signal for commanding execution of on / off control of power supply voltage supply
from the power supply unit in the cassette tape recorder with radio set as the audio reproducing
device according to the operation of the operation button 12 The command signal Cd is a signal
for commanding execution of control to reduce the volume of the sound reproduced in the
cassette tape recorder with radio set as the sound reproducing device according to the operation
of the operation button 13, and the control command signal Cu is In response to the operation of
the operation button 14, it is a signal instructing execution of control to increase the volume of
the sound reproduced in the cassette tape recorder with radio set as the sound reproduction
device.
[0031]
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In the control unit 32, the control signal CC corresponding to the control command signal Cb, the
control command signal Cd or the control command signal Cu from the operation unit 31 is
formed, and the switch control signal CS has a low level. It is formed as Then, the control signal
CC is supplied to the remote control signal forming unit 33, and the switch control signal CS is
supplied to the switch 30 in the wireless microphone unit 21.
[0032]
The switch control signal CS supplied from the control unit 32 to the switch 30 is formed as a
high level when the control signal CC is not supplied from the control unit 32 to the remote
control signal forming unit 33, and the control unit 32 Only when the control signal CC is
supplied to the remote control signal forming unit 33. The switch 30 in the wireless microphone
unit 21 is turned on when the switch control signal CS having a high level is supplied from the
control unit 32 and is off when the switch control signal CS having a low level is supplied from
the control unit 32. Take Therefore, the switch 30 in the wireless microphone unit 21 is in the
off state only when the control signal CC is supplied from the control unit 32 to the remote
control signal forming unit 33, and is in the on state otherwise.
[0033]
In remote control signal formation unit 33, in response to control signal CC from control unit 32,
control command signal Cb, control command signal Cd or control command signal Cu supplied
from control unit 31 to control unit 32 is handled. The remote control signal CR is formed. Then,
the remote control signal CR obtained from the remote control signal formation unit 33 is
amplified by the amplification unit 34 and is supplied to the control signal transmission unit 35
provided with the infrared transmission unit 15.
[0034]
In the control signal transmission unit 35, the infrared light which is intermittently modulated in
response to the remote control signal CR is emitted, and the infrared light is transmitted from the
infrared transmission unit 15 as the infrared signal CRR. Accordingly, from the control signal
transmission unit 35, the remote control signal CR is wirelessly transmitted in the form of the
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infrared signal CRR.
[0035]
In this manner, in the wireless remote control unit 22, when any of the control command signals
Cb, Cd and Cu is supplied from the operation unit 31 to the control unit 32, the control command
signal Cb from the control unit 32. , The control command signal Cd or the control signal CC
corresponding to the control command signal Cu is supplied to the remote control signal forming
unit 33, and the remote control signal corresponding to the control command signal Cb, the
control command signal Cd or the control command signal Cu accordingly. CR is wirelessly
transmitted from the control signal transmission unit 35 in the form of an infrared signal CRR,
and along with that, a switch control signal CS which takes a low level from the control unit 32 is
supplied to the switch 30 in the wireless microphone unit 21. Is taken off.
[0036]
Each of the operation unit 31, the control unit 32, the remote control signal formation unit 33,
the amplification unit 34 and the control signal transmission unit 35 in the wireless remote
control unit 22 from the power supply unit 20 when the power switch 23 is in the on state.
Power supply voltage Vb is supplied through the power supply switch 23, whereby the abovedescribed operation is performed.
When the remote control signal CR corresponding to the control command signal Cd or the
control command signal Cu is wirelessly transmitted from the control signal transmission unit 35
in the form of the infrared signal CRR in the wireless remote control unit 22, the control signal is
mainly transmitted. Due to the operation of the unit 35, the level fluctuation of the power supply
voltage Vb from the power supply unit 20 supplied through the power supply switch 23 is
caused.
[0037]
Since the power supply voltage Vb from the power supply unit 20 supplied through the power
supply switch 23 is commonly supplied not only to the wireless remote control unit 22 but also
to the wireless microphone unit 21, mainly the control signal transmission in the wireless remote
control unit 22 If the level fluctuation of the power supply voltage Vb is caused due to the
operation of the unit 35, the influence is also applied to the wireless microphone unit 21, and if
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the switch 30 is in the on state at that time, the oscillation and modulation will occur. The power
supply voltage Vb supplied to the unit 27 is assumed to have a level fluctuation. Under the
assumption that power supply voltage Vb supplied to oscillation and modulation unit 27 causes
level fluctuation, the carrier signal obtained from the oscillating circuit unit in oscillation and
modulation unit 27 responds to the level fluctuation of power supply voltage Vb. It is subject to
unwanted modulation. At that time, when the wireless microphone unit 21 is in a state where the
carrier voice signal SA is wirelessly transmitted from the voice signal transmitter unit 29 through
the antenna member 18, the carrier voice signal SA wirelessly transmitted is oscillated. This
results in including unwanted noise components caused by level fluctuations of the power supply
voltage Vb supplied to the modulation unit 27.
[0038]
However, in reality, in the wireless remote control unit 22, the remote control signal CR
corresponding to the control command signal Cd or the control command signal Cu is wirelessly
transmitted from the control signal transmission unit 35 in the form of the infrared signal CRR.
When the level fluctuation of the power supply voltage Vb from the power supply unit 20
supplied through the power supply switch 23 is caused mainly by the operation of the control
signal transmission unit 35, the low level is outputted from the control unit 32 in the wireless
remote control unit 22. Since the switch control signal CS is supplied to the switch 30 in the
wireless microphone unit 21 and the switch 30 is turned off, the power supply voltage Vb
causing the level fluctuation in the oscillation / modulation unit 27 in the wireless microphone
unit 21. Will not be supplied Is a non-operating state by oscillation and modulation unit 27 is not
made the supply of the power supply voltage Vb. Therefore, when level fluctuation of the power
supply voltage Vb is caused mainly by the operation of the control signal transmission unit 35 in
the wireless remote control unit 22, the wireless microphone unit 21 carries from the audio
signal transmission unit 29 through the antenna member 18. Even when the audio signal SA is
wirelessly transmitted, wireless transmission of the carrier audio signal SA is temporarily
interrupted, and the level change of the power supply voltage Vb supplied to the oscillation /
modulation unit 27 causes a failure. There is no case where the carrier voice signal SA, which is
supposed to contain the desired noise component, is transmitted wirelessly.
[0039]
In the example shown in FIG. 1 described above, supply of the power supply voltage Vb to the
oscillation / modulation unit 27 in the wireless microphone unit 21 is performed through the
switch 30, and the operation of the control signal transmission unit 35 in the wireless remote
control unit 22 is mainly performed. When the level fluctuation of the power supply voltage Vb is
caused, the supply of the power supply voltage Vb to the oscillation and modulation unit 27 is
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shut off by the switch 30, whereby the wireless transmission of the carrier voice signal SA is
temporarily interrupted. However, the control signal in the wireless remote control unit 22 is
mainly controlled by another method different from the method in which the supply of the power
supply voltage Vb to the oscillation / modulation unit 27 is cut off by the switch 30. When level
fluctuation of power supply voltage Vb is caused due to the operation of transmission unit 35
Oscillation and can not be obtained conveying audio signal SA from the modulation unit 27,
whereby the wireless transmission of conveying audio signal SA may be made to be temporarily
interrupted.
[0040]
Furthermore, the supply of the power supply voltage Vb to the oscillation / modulation unit 27 is
made directly from the switch 23 without passing through the switch 30, and the operation of
the control signal transmission unit 35 mainly in the wireless remote control unit 22. When the
level fluctuation of the power supply voltage Vb is caused due to the supply of the power supply
voltage Vb to the input amplification unit 26 in the wireless microphone unit 21 is cut off, the
voice input signal Sv amplified from the input amplification unit 26 is If it is not obtained, or the
supply of the amplified voice input signal Sv from the input amplification unit 26 to the
oscillation and modulation unit 27 is cut off, the normal carrier voice from the oscillation and
modulation unit 27 is The signal SA may not be obtained.
[0041]
FIG. 4 schematically shows an example of a cassette tape recorder with a radio, which is an audio
reproduction apparatus constituting an electronic apparatus called Karaoke system or the
like together with the microphone apparatus formed in the example shown in FIG.
[0042]
In the example of the cassette tape recorder with a radio shown in FIG. 4, the receiving antenna
41 and the tuner unit 42 which originally form a carrier signal receiving unit for selectively
receiving a radio broadcast signal are provided. In this case, the reception signal selection state
corresponding to the selection control signal ST from the reception signal selection control unit
43 is taken.
The reception signal selection control unit 43 supplies the selection control signal ST to the tuner
unit 42 in accordance with the control signal CT sent from the control unit 44.
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The control unit 44 is supplied with a command signal CX issued from the operation unit 45.
[0043]
Under such circumstances, the operation in the operation unit 45 is performed, and the
operation unit 45 instructs the control unit 44 to receive the carrier voice signal SA wirelessly
transmitted from the microphone device formed in the example shown in FIG. 1. When the
command signal CX supposed to be supplied is supplied, the control unit 44 sends the control
signal CT corresponding to the command signal CX to the reception signal selection control unit
43, and the reception signal selection control unit 43 responds to the control signal CT. The
selection control signal ST is supplied to the tuner unit 42.
Thereby, in the tuner unit 42, a reception signal selection state in which the carrier voice signal
SA wirelessly transmitted from the microphone device formed in the example shown in FIG. 1 can
be received.
[0044]
The carrier voice signal SA wirelessly transmitted from the wireless microphone unit 21 in the
example shown in FIG. 1 is guided to the tuner unit 42 through the receiving antenna 41 while
such a reception signal selection state is taken by the tuner unit 42. It is received by the tuner
unit 42. Then, the carrier audio signal SA received is frequency-converted by the tuner unit 42 to
be an audio intermediate frequency signal SAI.
[0045]
The audio intermediate frequency signal SAI, which is a reception signal obtained from the tuner
unit 42, is amplified by the intermediate frequency amplification unit 46 and supplied to the
demodulation unit 47. The demodulation unit 47 performs frequency demodulation on the audio
intermediate frequency signal SAI, which is an FM signal, to obtain an audio input signal Sv as a
demodulation output. That is, the voice input signal Sv obtained by the microphone body 25 in
the wireless microphone unit 21 shown in FIG. 1 is reproduced. Then, the reproduced voice input
signal Sv is supplied to the selection contact 48 a of the switch 48. The selection contact 48b of
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the switch 48 is connected to the external input terminal 49 to which the attached microphone is
connected, and when the attached microphone is used, the audio input signal Sm obtained from
the attached microphone is the external input terminal Supplied through 49.
[0046]
The switch control signal CVM from the control unit 44 is supplied to the switch 48. Then, when
the command signal CX is supplied from the operation unit 45 to the control unit 44 to instruct
reception of the carrier voice signal SA wirelessly transmitted from the microphone device
formed in the example shown in FIG. A switch control signal CVM from unit 44 causes switch 48
to assume its movable contact 48c connected to select contact 48a. As a result, the audio input
signal Sv reproduced by the demodulator 47 is derived to the movable contact 48 c of the switch
48, and the audio input signal Sv is supplied to the signal adder 50.
[0047]
The audio signal Sx from the audio signal reproduction unit 51 is also supplied to the signal
addition unit 50. The audio signal reproduction unit 51 is formed by a cassette tape recorder
unit. Then, in the audio signal reproduction unit 51, the cassette tape is loaded, the information
signal recorded in the cassette tape is read, and the audio signal Sx is reproduced from the read
information signal. The audio signal Sx represents, for example, an accompaniment sound in
music.
[0048]
The voice signal reproduction unit 51 is supplied with the operation control signal CTC from the
control unit 44, and the carrier voice signal SA wirelessly transmitted from the microphone
device formed in the example shown in FIG. 1 from the operation unit 45 to the control unit 44.
The operation control signal CTC from the control unit 44 reproduces the audio signal Sx to the
cassette tape recorder forming the audio signal reproducing unit 51 when the command signal
CX for instructing the reception of the signal is supplied. Let me
[0049]
The signal addition unit 50 performs signal synthesis in which the audio input signal Sv
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reproduced by the demodulation unit 47 is superimposed on the audio signal Sx obtained from
the audio signal reproduction unit 51 formed by the cassette tape recorder unit. An audio signal
Sz is formed.
Then, the synthesized voice signal Sz obtained from the signal adding unit 50 is supplied to the
selection contact 52 a of the switch 52. The audio signal Sx obtained from the audio signal
reproduction unit 51 formed by the cassette tape recorder unit is directly supplied to the
selection contact 52b of the switch 52.
[0050]
The switch 52 is supplied with a switch control signal CVX from the control unit 44. Then, when
the command signal CX is supplied from the operation unit 45 to the control unit 44 to instruct
reception of the carrier voice signal SA wirelessly transmitted from the microphone device
formed in the example shown in FIG. The switch control signal CVX from the unit 44 causes the
switch 52 to be in a state where its movable contact 52c is connected to the selection contact
52a. As a result, the synthesized voice signal Sz obtained from the signal addition unit 50 is
derived to the movable contact 52 c of the switch 52, and the synthesized voice signal Sz is
supplied to the graphic equalizer unit 53.
[0051]
In the graphic equalizer unit 53, the low-frequency component to the high-frequency component
of the synthesized speech signal Sz is divided into a plurality of frequency band components, and
level adjustment is performed for each frequency band component, and as a result, a
predetermined amount is obtained. A synthetic speech signal Szo is formed which is supposed to
have frequency-level characteristics. The synthesized voice signal Szo obtained from the graphic
equalizer unit 53 is subjected to level adjustment for volume adjustment in the level adjustment
unit 54, then, power amplification is performed by the output amplification unit 55, and is
supplied to the speaker unit 56. As a result, audio based on the audio input signal Sv reproduced
by the demodulator 47 is superimposed on the accompaniment sound based on the audio signal
Sx obtained from the audio signal reproducer 51 formed by the cassette tape recorder from the
speaker 56 The resulting mixed sound is emitted.
[0052]
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Further, in the example of the cassette tape recorder with a radio shown in FIG. 4, the receiver 61
receives the infrared signal CRR sent from the wireless remote control unit 22 in the example
shown in FIG. A remote control signal CR is derived corresponding to the infrared signal CRR
received from. The remote control signal CR obtained from the receiving unit 61 is supplied to
the decoder unit 62, and based on the remote control signal CR, the decoder unit 62 emits light
from the operation unit 31 included in the wireless remote control unit 22 in the example shown
in FIG. A control signal Cr corresponding to any one of the control command signals Cb, Cd and
Cu is obtained, and the control signal Cr is supplied to the control unit 44.
[0053]
In the control unit 44 supplied with the control signal Cr, the control signal Cr corresponds to the
control command signal Cb emitted from the operation unit 31 included in the wireless remote
control unit 22 in the example shown in FIG. When the power on / off control signal CPS is
formed and the power on / off control signal CPS is an example of the cassette tape recorder with
radio shown in FIG. 4, the control unit 44, the operation unit 45, the receiving unit 61 and the
decoder It is supplied to the power supply unit 63 which supplies the power supply voltage Vbb
to each unit other than the unit 62. As a result, the power supply unit 63 is turned on or off
according to the power on / off control signal CPS.
[0054]
Further, in the control unit 44 to which the control signal Cr is supplied, the control signal Cr
corresponds to the control command signal Cd emitted from the operation unit 31 included in
the wireless remote control unit 22 in the example shown in FIG. , The level reduction control
signal CLD is formed, the level reduction control signal CLD is supplied to the level adjustment
unit 54, and the control signal Cr is further included in the wireless remote control unit 22 in the
example shown in FIG. When it corresponds to the control command signal Cu issued from the
operation unit 31, the level increase control signal CLU is formed, and the level increase control
signal CLU is supplied to the level adjustment unit 54. In the level adjustment unit 54, when the
level reduction control signal CLD is supplied from the control unit 44, the level adjustment is
performed such that the level of the synthetic speech signal Szo supplied to the output
amplification unit 55 is reduced, and When the level increase control signal CLU is supplied from
the control unit 44, level adjustment is performed such that the level of the synthetic speech
signal Szo supplied to the output amplification unit 55 is increased. As a result, the volume of the
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mixed sound emitted from the speaker unit 56 is reduced according to the level reduction control
signal CLD supplied from the control unit 44 to the level adjustment unit 54, and from the
control unit 44 to the level adjustment unit 54. It is increased according to the level increase
control signal CLU supplied.
[0055]
Thus, when the remote control signal CR is wirelessly transmitted in the form of an infrared
signal CRR from the wireless remote control unit 22 in the example shown in FIG. 1, the radio
cassette tape recorder shown in FIG. Power on / off control or volume reduction control or
volume increase control is performed for the example.
[0056]
In the example of the cassette tape recorder with radio shown in FIG. 4, when the switch 48 is
placed in a state where the movable contact 48c is connected to the selection contact 48b, the
audio input signal Sm supplied through the external input terminal 49 is The signal addition unit
50 is supplied to the selection contact 52 a of the switch 52 so as to be superimposed on the
audio signal Sx reproduced by the audio signal reproduction unit 51 or without being
superimposed on the audio signal Sx.
Further, when the switch 52 is placed in a state where the movable contact 52c is connected to
the selection contact 52b, the audio signal Sx reproduced by the audio signal reproducing unit
51 formed by the cassette tape recorder unit alone is a graphic equalizer unit. It is in the state of
being supplied to 53.
[0057]
As is apparent from the above description, the wireless transmission device according to the
present invention comprises the wireless microphone unit and the wireless remote control unit
housed in one case member, and the wireless microphone unit is configured by the microphone
It is possible to wirelessly transmit a carrier voice signal formed according to voice input through
the main body, and the wireless remote control unit forms a remote control signal according to
the operation of the operation unit, and the remote control signal In order to control the
operation of the audio reproduction apparatus, it is possible to perform an operation of wireless
transmission. Therefore, the wireless transmission device according to the present invention
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includes the wireless microphone unit, for example, a "karaoke system" in which wireless
transmission and reception of an audio signal is performed between the microphone device and
the audio reproduction device. It can be used to form a microphone device in an electronic device
referred to as etc. , and in that case, the wireless remote control unit remotely controls or
adjusts the sound reproduction device and separately controls the remote control commander. It
will be possible to do without providing it, and certainly without putting an excessive burden on
the person using the microphone device.
[0058]
Furthermore, in one example of the wireless transmission device according to the present
invention, both the wireless microphone unit and the wireless remote control unit are operated
by supplying the power supply voltage from the commonly provided power supply unit.
Effectively simplifies and reduces the cost of the power supply voltage supply unit, and wirelessly
transmits the carrier voice signal by the wireless microphone unit when the wireless remote
control unit is placed in an operating state for wirelessly transmitting the remote control signal.
When the power supply voltage fluctuates with the wireless transmission of the remote control
signal by the wireless remote control unit, the power supply voltage fluctuation affects the
wireless microphone unit sharing the power supply unit with the wireless remote control unit. As
a result, wireless transmission from the wireless microphone Is a situation the conveying audio
signals becomes as including the noise component due to power supply voltage variation will not
occur is.
[0059]
Brief description of the drawings
[0060]
1 is a block connection diagram showing the configuration of the circuit system and the power
supply voltage supply section for it in an example of the wireless transmission device according
to the present invention.
[0061]
2 is a perspective view showing the appearance of an example of a wireless transmission device
according to the present invention.
[0062]
3 is a perspective view showing the appearance of an example of a wireless transmission device
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according to the present invention.
[0063]
4 is a block diagram showing an example of an audio reproduction apparatus constituting an
electronic device called "Karaoke system" etc. together with the microphone device formed in the
example shown in FIG.
[0064]
Explanation of sign
[0065]
DESCRIPTION OF SYMBOLS 10 Case member 11 Microphone cover part 12, 13, 14 Operation
button 15 Infrared transmission part 16 Power on / off button 17 Power on / off display part 18
Antenna member 20 Power supply part 21 Wireless microphone part 22 Wireless remote
control part 23 Power switch 25 Microphone body 26 Input amplification unit 27 Oscillation and
modulation unit 28, 34 Amplification unit 29 Audio signal transmission unit 31, 45 Operation
unit 32, 44 Control unit 33 Remote control signal formation unit 35 Control signal transmission
unit 41 Reception antenna 42 Tuner unit 43 Reception Signal selection control unit 46
intermediate frequency amplification unit 47 demodulation unit 48, 52 switch 50 signal addition
unit 51 audio signal reproduction unit 53 graphic equalizer unit 54 level adjustment unit 55
output amplification unit 56 speaker unit 61 reception unit 62 decoder unit 63 power supply
unit
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