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DESCRIPTION JP2002078037

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DESCRIPTION JP2002078037
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
wireless loudspeaker system, and more particularly, to a system capable of optimizing the
loudspeaker output of voice input to a wireless microphone on site according to the use
environment.
[0002]
2. Description of the Related Art Conventionally, in broadcast stations, schools, hotels, wedding
halls, stations, etc., voices input from wireless microphones are modulated into radio waves and
transmitted in the air, and the voices are amplified and output on the receiving side. It is done.
[0003]
[0003] A wireless loudspeaker of this type performs FM modulation or digital modulation of
voice input from a wireless microphone and applies a 300 MHz band or 800 MHz band micro
power standard according to the radio method or a weak radio wave. It is designed to transmit in
the air, and the wireless receiver side that receives this radio wave is designed to modulate and
amplify a voice signal and then to make it louder through a speaker.
[0004]
However, in such a conventional wireless loudspeaker system, it is necessary to change the
volume and the sound quality in accordance with the environment in which the wireless
microphone is used. Since the operator standing by at the receiving device is adjusting the
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volume etc., the status of the environment using the wireless microphone can not be known, and
in order to obtain an appropriate volume etc., from the person at that location There was a
problem that it would be trial and error according to the instruction of.
[0005]
The present invention has been made to solve such a problem, and provides a wireless
loudspeaker capable of optimally amplifying input speech within a wireless microphone usage
environment.
[0006]
SUMMARY OF THE INVENTION According to the present invention, there is provided a wireless
amplification device including: a wireless microphone for modulating an audio signal to be
collected and input into a radio wave and transmitting the radio signal; and an audio signal
obtained by receiving and demodulating the radio wave. A wireless output apparatus for
outputting a voice output from the remote control device, the remote control device for
transmitting an instruction input signal from the input unit in the air without interrupting the
transmission of the radio wave, the wireless microphone being transmitted from the remote
control Receiving the instructed input signal and transmitting it to the reception output device
together with the radio wave, while the reception output device receives the instruction input
signal sent together with the radio wave from the wireless microphone and outputs the voice
signal The above-mentioned loud speaker output is controlled.
[0007]
According to this configuration, while confirming the loud sound output of the input voice signal
by the wireless microphone to be used, an instruction input for controlling the loud sound output
of the voice signal by operating the remote control in the environment using the wireless
microphone The signal can be sent to the receive output device via a wireless microphone.
Therefore, it is possible to optimally adjust the volume and the sound quality for expanding the
input sound in the environment using the wireless microphone.
[0008]
Here, as the wireless microphone, the instruction input signal sent from the remote control may
be at a specific frequency outside the voice band so that the present invention can be constructed
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inexpensively by utilizing the configuration of a normal wireless microphone. It is preferable to
adopt a configuration in which the signal is modulated to the sub-carrier and transmitted to the
reception output device together with the radio wave of the voice signal.
[0009]
Also, when the wireless microphone adopts a configuration in which the remote control receives
the instruction input signal transmitted in the air by optical communication, the instruction input
from the input unit of the remote control used in another device Is preferably designed to receive
the instruction input signal, so that, for example, an optical remote control for a television
receiver can be shared as the remote control, which is preferable.
[0010]
DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below
based on the drawings.
1 to 6 are views showing an embodiment of a wireless loudspeaker according to the present
invention.
[0011]
In FIG. 1, the wireless loudspeaker is constructed by a wireless microphone 11, a receiver 12, an
amplifier 13 and a recording / reproducing device 14, and the voice of the utterer inputted from
the wireless microphone 11. S is amplified and FM-modulated or digital-modulated, and then airtransmitted to the receiving device 12 by radio waves W of micropower or weak power
transmission power, after which the voice signal received by the receiving device 12 is
demodulated and then amplified The sound signal received by the receiving device 12 can be
recorded and held in the recording medium by the recording and reproducing device 14, and the
recording medium can be recorded in the recording and reproducing device 14. The basic
performance is that the audio signal recorded by setting can be amplified from the speaker of the
amplification device 13 To have.
That is, the reception device 12 and the amplification device 13 constitute a reception output
device.
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[0012]
As shown in FIG. 2, the wireless microphone 11 transmits the microphone unit 21, the
amplification circuit 22, the modulation circuit 23, the multiplication circuit 24, the output
circuit 25, the filter circuit 26, the antenna 27, and The transmitting circuit 28 includes a circuit
28, a tone signal circuit 29, and a modulation circuit 30, and amplifies the sound S input from
the microphone unit 21 by the amplification circuit 22 and converts it into a radio wave W to be
transmitted in the air. After the frequency modulation is performed by the modulation circuit 23
according to the source oscillation frequency, the frequency of unnecessary radiation outside the
transmission frequency is removed by the filter circuit 26 as the transmission frequency through
the multiplication circuit 24 and the output circuit 25. Send to 12
At this time, the tone signal circuit 29 generates a tone signal T (subcarrier) for opening and
closing the squelch circuit 56 illustrated in FIG. 6 of the receiving device 12 so that noise of
interference waves is not generated. The tone signal T is mixed with the input voice signal from
the microphone unit 21 and is transmitted from the antenna 27 to the receiving apparatus 12 by
being input to the amplification circuit 22 through 30.
The battery 31 and the stabilization circuit 32 function as a power supply for stably supplying
power for use as the wireless microphone 11.
[0013]
The wireless loudspeaker apparatus is configured to be able to adjust the volume and the sound
quality by the receiving device 12 for expanding the audio signal from the wireless microphone
11 from the optical remote controller 15, and the optical remote controller 15 is As shown in
FIG. 3, according to an instruction input key from the input unit 41, a control data signal
(instruction input signal) is generated by the data circuit 42 and is output as an optical signal R
from the light transmission sensor 44 via the output circuit 43. While transmitting in the air, the
wireless microphone 11 receives the optical signal R of the control data signal from the optical
remote controller 15 by the optical reception sensor 33 disposed on the opposite side of the
microphone head (microphone unit 21 side) and receives the reception circuit 34 and The tone
signal T is input to the modulation circuit 30 via the matching circuit 35 and transferred to the
receiver 12.
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[0014]
Specifically, in general, the wireless microphone 11 is interfered by another strong radio wave
due to a very weak transmission output of minute power or weak power, and the radio wave W
to be transmitted is suppressed, and the interference radio wave is In order to prevent strong
noise from being output from the receiving device 12, as shown in FIG. 4, the tone signal T is
prepared outside the band of the voice S input from the microphone unit 21, When the
interference wave from other than the wireless microphone 11 suppresses the transmission radio
wave W from the wireless microphone 11, the tone signal T is controlled so as not to transmit
and output to the receiving device 12, while the receiving device 12 controls the wireless
microphone When the reception / reproduction of the tone signal T that recognizes and identifies
11 is not performed, the noise of the interference wave is reduced by closing the squelch circuit
56 to restrict the signal passage. It is controlled so as not to live.
[0015]
From this, the wireless microphone 11 modulates and superimposes the control data signal sent
from the optical remote controller 15 by the optical signal R on the tone signal T and transfers it
to the receiving device 12 It has become.
[0016]
At this time, the wireless microphone 11 generates the tone signal T of approximately 35 kHz to
40 kHz by the tone signal circuit 29 so as to be outside the band of 30 Hz to 10 kHz of the
sound. The control data signal received by the reception sensor 33 is reproduced by the
reception circuit 34 and converted to low speed data by the matching circuit 35, and then data in
which the tone signal T generated by the tone signal circuit 29 is amplitude modulated (so-called
A1 modulation) As shown in FIG. 5 (b), the tone signal T at the timing corresponding to the
control data signal shown in FIG. 5 (a) is identified as a data modulation. 100% amplitude
modulation at a speed that does not close the squelch circuit 56 so that While maintaining the
amplitude for opening and closing the squelch circuit 56 as the tone signal T by amplitude
modulation of about 30 to 50% which does not close the squelch circuit 56 at least, it is also
transmitted to the receiver 12 as a control data signal by the change of the amplitude. Are set so
that they can be played back and recognized.
[0017]
On the other hand, the receiver 12 includes an antenna 51, a high frequency amplification circuit
52, a mixing circuit 53, an intermediate frequency amplification circuit 54, a detection circuit 55,
a squelch circuit 56, a low frequency amplification circuit 57, and an output. The circuit 58, the
local transmission circuit 59, the tone signal detection circuit 60, the tone signal detection circuit
61, the matching circuit 62, the control circuit 63, the storage circuit 64, the output circuit 65,
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and the output terminals 66 and 67 The audio signal etc. received from the wireless microphone
11 by the antenna 51 is sent from the local transmission circuit 59 by the mixing circuit 53
while being appropriately amplified while removing frequencies outside the target by the high
frequency amplification circuit 52. The intermediate frequency is generated by mixing with the
transmission signal, and an audio signal or the like having this intermediate frequency is
amplified by the intermediate frequency amplification circuit 54 with a high amplification factor,
and then detected. It adapted to process separate and play to the audio signal and tone signal T
and FM detection by 55.
[0018]
In the receiver 12, only the very high Q signal which is recognized as the tone signal T for the
wireless microphone by the tone signal detection circuit 60 is not shown in the tone signal T
reproduced by the detection circuit 55. After being taken out by the filter circuit, the tone signal
detection circuit 61 separates it into an ON signal as the original tone signal T and low speed
data which is a control data signal from the optical remote controller 15, and turns it on as the
tone signal T. The signal is output to the squelch circuit 56, while the control data signal of low
speed data is output to the matching circuit 62, and the ON signal of the tone signal T is input to
the squelch circuit 56, thereby the squelch circuit The gate of 56 is opened, and the volume of
the audio signal separated from the tone signal by the detection circuit 55 is set by the low
frequency amplification circuit 57. The low-speed data is controlled via the matching circuit 62
while outputting to the amplifying device 13 as a loudspeaker as a loudspeaker that is amplified
so as to be sound quality and connected to the output terminal 66 via the output circuit 58 and
output from a speaker not shown. The data signal is read at high speed from the control data
signal by the CPU contained in the control circuit 63 and collated with data stored in advance in
the storage circuit 64 to make the output circuit 65 serving as a buffer circuit. The signal is
output to the low frequency amplification circuit 57 as a signal for controlling the volume and
the sound quality of the voice S being amplified.
[0019]
Therefore, while the ON signal of the tone signal T is output to the squelch circuit 56 and the
voice S sent from the wireless microphone 11 is outputted as a loud voice, the input operation of
the optical remote controller 15 separated from the tone signal T is performed. Based on the
control data signal, it is possible to adjust the volume and sound quality of the voice S to be
amplified.
The control signal generated by the control circuit 63 based on the control data signal separated
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from the tone signal T output to the low frequency amplification circuit 57 is not limited to the
type output to the low frequency amplification circuit 57, but an output The recording /
reproducing apparatus 14 connected to the terminal 67 may be controlled to be ON / OFF.
[0020]
As described above, in the present embodiment, while confirming the sound expansion state of
the voice S input from the wireless microphone 11, the optical remote controller 15 is operated
in the environment where the wireless microphone 11 is used, and the voice S is detected. It is
possible to construct a wireless loudspeaker system having an excellent effect of transmitting an
optical signal R that does not affect the radio wave W and adjusting the volume and sound
quality of the voice S to be amplified.
[0021]
In another aspect of the present embodiment, the optical remote controller 15 for transmitting
the optical signal R to the wireless microphone 11 is provided so that the adjustment of the
channel and volume of the television receiver can be performed wirelessly. It may be configured
such that it can be used by diverting the television optical remote control attached to the
television receiver.
As this television optical remote control uses the same data format standardized by EIAJ (Japan
Electronic Machinery Manufacturers Association), the hardware and data system of the optical
remote control 15 do not have to be determined in particular. Also, since the optical remote
control for television can be used as it is, the cost for constructing the system can be reduced, for
example, because the development cost and the work of standard standardization in the industry
can be omitted.
[0022]
Specifically, since the optical remote controller 15 for television is provided with the input unit
41 for selecting the volume and channel, as an example of diverting the input unit 41, the
volume function is used as it is for adjusting the volume. While the channel 1 selection button is
pressed continuously, the volume of the bass region increases while the channel 2 selection
button is pressed continuously, the volume of the low region decreases. Pressing the select
button on channel "12" continuously increases the volume of the high range, while pressing the
select button on channel "11" decreases the volume of the high range etc. It is sufficient to use
the functions of 15 to perform various operations.
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[0023]
Here, according to the above-described embodiment, the wireless microphone 11 is used to
adjust the volume and sound quality of the voice S input to the wireless microphone 11 so as to
increase the volume and sound quality in the related art. By relaying and transmitting the control
data signal by the operation of the optical remote controller 15 to the wireless microphone 11 in
the operating environment, the volume and the sound quality can be adjusted in the same
manner as the wireless microphone 11 amplifies the voice S. It is also considered that the control
operation itself may be configured to be performed by a wireless microphone.
[0024]
However, if the volume is set low on the side where the voice S is loudened, the loudness level is
increased on the wireless microphone side.
[0025]
Then, for example, when the user of the wireless microphone moves the microphone head away
from his / her mouth or adjusts the volume to increase, the dynamic range of the low frequency
amplification circuit of the wireless microphone has The head margin of the low-frequency
amplifier circuit is set small, so if the user of the wireless microphone brings the microphone
head closer to the mouth or makes a loud voice at that setting, the audio peak will be located at a
position beyond the head margin It is assumed that a problem will occur that the voice that is
reached and loudened will be in a distorted state.
[0026]
Therefore, by adopting the configuration described in the above embodiment, the dynamic range
of the wireless microphone 11 is set to the maximum state so that the level of the input voice S is
not varied. By adjusting the volume on the output side of the receiving device 12, it is possible to
enable the volume adjustment to effectively use the dynamic range on the wireless microphone
11 and the receiving device 12 side.
[0027]
Also, if the user of the wireless microphone is configured to adjust the volume by himself, he will
hear and adjust the voice that has been loudened at the position of the user, and the user should
adjust the voice from the point of view of the listener. According to the above-described
embodiment, the listener operates the optical remote controller 15 to optimally adjust the
volume and the like of the loud sound from the viewpoint of the listener according to the
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embodiment described above. It is possible to
[0028]
As described above, according to the present invention, the device on the reception output side
can be remote-controlled while checking the volume and sound quality for loudening the input
voice by the wireless microphone on the spot. The person near the user of the wireless
microphone can adjust the volume and the sound quality according to the use environment.
Therefore, it is possible to provide a wireless loudspeaker having an excellent effect that the
input speech can be optimally amplified in the use environment of the wireless microphone.
[0029]
Brief description of the drawings
[0030]
1 is a view showing an embodiment of a wireless loudspeaker according to the present invention,
is a perspective view showing the general overall configuration thereof.
[0031]
2 is a block diagram showing the configuration of the wireless microphone.
[0032]
3 is a block diagram showing the configuration of the remote control.
[0033]
4 is a graph illustrating the transmission of the voice.
[0034]
5 is a graph illustrating the transmission of the control data.
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[0035]
6 is a block diagram showing the configuration of the receiving apparatus.
[0036]
Explanation of sign
[0037]
11 wireless microphone 12 receiver 13 amplifier 14 recording / reproducing device 15 optical
remote control 27 antenna 29 tone signal circuit 30 modulation circuit 33 light reception sensor
34 reception circuit 35 matching circuit 41 input circuit 42 data circuit 43 output circuit 44
light transmission sensor 51 antenna 55 detection circuit 56 squelch circuit 57 low frequency
amplification circuit 59 local transmission circuit 60 tone signal detection circuit 61 tone signal
detection circuit 62 matching circuit 63 control circuit 64 storage circuit 65 output circuit
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