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JPH02252372

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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 JPH02252372
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
wireless microphone system suitable for use in a VTR integrated camera or the like. [Prior Art]
When shooting and recording a subject with a VTR integrated camera, the camera body is
provided with a microphone so that the generated sound of the subject being shot can also be
recorded at the same time. In the case of imaging and recording, a wireless microphone system
can also be used in order to be able to input and record voices such as conversations and
dictations of a person whose input is inconvenient from the microphone. This consists of a
wireless transmitter and a wireless receiver as described in, for example, ?Video Salon March
Special Issue?, published on March 30, 631, p. 259, and the wireless transmitter has a
microphone. The wireless receiver is detachably mounted on the body of the VTR integrated
camera and supplies the received audio signal to an audio circuit in the camera body through a
signal line. FIG. 4 shows this wireless microphone system, in which 1 is a transmitter, 2 is a
power switch, 3 is a microphone (hereinafter simply referred to as a microphone), 4 is a cable, 5
is a VTR integrated camera, and 6 is reception. 7, 7 is a power switch, 8 is an antenna, 9 is a
cable, 10 is a plug, and 11 is a mounting portion. In the figure, the transmitter 1 is sized to fit in
the chest pocket of the Y-shirt, and the microphone 3 is connected via the cable 4. When this is
used, the transmitter 1 is placed in the chest pocket of the garment, such as a Y-shirt or a suit,
and the microphone 3 is attached to the appropriate part of the garment. When the power switch
2 is turned on, voice is input from the microphone 3, and the voice signal is amplified, modulated
and transmitted in the transmitter 1. Further, the receiver 6 has an antenna 8 and a cable 9, and
can be attached to a mounting portion 11 provided in the VTR integrated camera 5. When this is
used, the receiver 6 is attached to the mount 11 and the plug 10 provided at the end of the cable
9 is inserted into a predetermined insertion port provided in the VTR integrated camera 5 to turn
on the power switch 7. To turn on the power of the receiver 6. Therefore, when the VTR
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integrated camera 5 is set to the photographing / recording mode and the transmitter 1 is
operated, the transmission voice signal from the transmitter 1 is received by the antenna 6. The
received audio signal is subjected to processing such as amplification and demodulation in the
receiver 6 and then supplied to an audio circuit in the VTR integrated camera 5 through the
cable 9.
On the other hand, the VTR-integrated camera is provided with an operation unit that allows the
user to operate the VTR and the camera, but a wired remote control system has also been
developed that allows the user to operate remotely. . This comprises a remote control having an
operation unit for performing predetermined operations of the VTR and the camera, and is
connected to the VTR integrated camera by a cable. By turning on the power of the VTR
integrated camera and the remote control and operating the operation unit of the remote control,
it is possible to perform recording and reproduction of VTR, rewind, fast forward title insertion,
and the like. According to this, the user can operate the VTR while shooting with the VTR-type
camera. SUMMARY OF THE INVENTION However, according to the above-mentioned prior art,
when a person to be an object of the VTR integrated camera tries to operate the integrated
camera of the VTR while using the wireless microphone system, There is a problem that the
transmitter and the remote control have to be carried. Furthermore, since the remote control is
connected to the VTR integrated camera and the cable, the distance from the VTR integrated
camera to the person to be photographed is limited, and imaging using zooming can not be
performed, which is an advantage of using the wireless microphone system. There is no An object
of the present invention is to provide a wireless microphone system capable of solving such
problems and performing transmission and control of an audio signal. [Means for Solving the
Problems] In order to achieve the above object, according to one aspect of the present invention,
a transmitter for modulating and transmitting an audio signal is provided with means for
modulating and transmitting a control signal, and the transmitted audio signal And receiving
means for receiving and demodulating the received control signal. [Operation] In the transmitter,
not only the audio signal but also the control signal can be transmitted, and the transmitter can
control the desired device on the receiving side. Embodiments of the present invention will be
described below with reference to the drawings. FIG. 1 is a block diagram showing an
embodiment of a wireless microphone system according to the present invention, wherein 12 is a
changeover switch, 13 is a power switch, 14a to 14f are operation keys, 15 is a cable, and 16 is a
plug. The parts corresponding to the figures are given the same reference numerals. In the same
figure, a microphone 3 is connected to the transmitter 1 by a cable 4 as in the conventional
transmitter 1 shown in FIG. 4, and a power switch for turning on / off the power of the
transmitter 1 itself. Although 2 is provided.
Furthermore, one side of the transmitter 1 constitutes an operation unit, and a power switch 13
and various operation keys 14a to 14f are provided. Here, the power switch 13 is for turning on
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/ off the power of the VTR integrated camera 5. Further, the operation key 14a is a key (start /
stop key) for starting and stopping recording of the V 'l' R integrated camera 5, and the operation
key 14b is a key for adjusting the focus of the VTR integrated camera 5 (focus The operation key
14c is also a key (zoom key) for zooming, and the operation key 14d is a key for rewinding the
VTR in the VTR integrated camera 5 (REV key), and the operation key 14e is also for
reproduction. The key (play key) and the operation key 14f are also used as keys (FF key) for fast
forwarding. When the power switch 13 and the operation keys 14a to 14f are operated, a control
signal corresponding to this is generated, but the control signal generated in the transmitter 1 is
modulated and transmitted. Furthermore, the transmitter 1 is provided with the changeover
switch 12. By operating this switch, only the audio signal from the microphone 3 can be
transmitted, and only the control signal by the operation at the operation unit can be transmitted.
It is possible to select any one of the following modes and the mode in which the audio signal
and the control signal can be transmitted. On the other hand, the receiver 6 is provided with a
circuit for receiving an audio signal or control signal transmitted from the transmitter 1 and
demodulating or separating it, and the audio signal of the plug 10 is a VTR integrated camera
The audio signal in the VTR integrated camera 5 is supplied to the audio circuit in the VTR
integrated camera 5 through the cable 9 inserted into the predetermined insertion port of 5, and
the control signal is inserted into the predetermined insertion port of the VTR integrated camera
5 It is supplied to the control circuit in the VTR integrated camera 5 through the cable 15.
Therefore, when the VTR integrated camera 5 is operated, first, the receiver 6 is attached to the
mounting portion 11 of the VTR integrated camera 5, the plug 10.16 is inserted into a
predetermined insertion port, and the power switch 7 is operated. Then, the power supply of the
receiver 6 is turned on 1 Next, in the transmitter 1, the power supply switch 2 is operated to turn
on the power, and the changeover switch 12 is operated to set a mode in which the control signal
can be transmitted. Then, when the power switch 13 is operated, a control signal corresponding
to this is transmitted from the transmitter 1. The control signal is received by the receiver 6 and
supplied to the VTR integrated camera 5 through the cable 15. As a result, the VTR integrated
camera 5 is in a state where the power is turned on.
In such a state, when one of the operation keys 14a to 14f is operated, the VTR-type camera 5
operates in response to this. In the VTR-integrated camera 5, when the power switch 13 of the
transmitter 1 is operated, the camera unit starts imaging at the same time when the power is
turned on. In order to record the imaging screen, the operation key 14a (start stop key) may be
operated. When the camera unit is imaging, when the operation key 14b (focus key) is operated,
focus adjustment in the camera unit is performed. It is possible. When the operation key 14C
(zoom key) is operated, zooming is performed by the camera unit. The focus adjustment and
zooming can be performed by the user who is photographing, but the VTR-type camera 5 is
connected to a monitor receiver (not shown), and the monitor receiver monitors the image
pickup screen. It can also be done while If the VTR integrated camera 5 is connected to a monitor
receiver, the VTR unit of the VTR integrated camera 5 is controlled by operating the operation
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keys 14d, 14e or 14f of the transmitter 1, and the rewinding of the magnetic tape is performed. ,
Play back or fast forward, and can also monitor the playback image. FIG. 2 shows the circuit
configuration of the transmitter 1 in FIG. 1. 17 is an amplifier circuit, 18 is an operation key
manual power means, 19 is a control signal generating circuit, 20 is a switch, 21 is a modulation
circuit, 22 Is an antenna. In the figure, the audio signal generated by the microphone 3 is. After
being amplified by the amplifier circuit 17, it is supplied to the switch 20. Further, the operation
key manual unit 18 controls the control signal generating circuit 19 in accordance with the
operation of the power switch 13 and the operation keys 14a to 14f in the operation unit of the
transmitter 1 shown in FIG. Alternatively, control signals corresponding to the operation keys
14a to 14f are generated. This control signal is supplied to the switch 20. The switch 20 is
controlled by the changeover switch 12 of the transmitter 1 shown in FIG. 1, and selects either
an audio signal output from the amplifier circuit 17 or a control signal output from the control
signal generation circuit, and Both the audio signal and the control signal are passed. The output
signal of the switch 20 is modulated by the modulation circuit 21 and transmitted from the
antenna 22. FIG. 3 shows the circuit configuration of the receiver 6 in FIG. 1, wherein 23 is a
demodulation circuit, 24 is a separation circuit, 25 is an amplification circuit, 26 is a control
output circuit, and 27. 28 is an output terminal. . In the figure, the transmission signal of the
transmitter 1 (FIG. 1) is received by the antenna 8, is demodulated by the demodulation circuit
23, and is supplied to the separation circuit 24. The 0 separation circuit 24 converts the received
signal into an audio signal and a control signal. And the separated audio signal is amplified by the
amplifier circuit 25 and output from the power terminal 27 to the audio circuit of the VTR
integrated camera 5 via the cable 9 shown in FIG. After being processed by the control output
circuit 26, the separated control signal is supplied from the output terminal 28 to the control
circuit of the VTR integrated camera 5 via the cable 15 shown in FIG.
Therefore, in FIGS. 2 and 3, when the switch 20 of the transmitter 1 is set to select the output
signal of the amplifier circuit 17, only the audio signal from the microphone 3 is transmitted
from the antenna 22 and received. In the device 6, only the audio signal is output from the
separation circuit 24 and supplied to the VTR integrated camera 5 from the output terminal 27.
When the switch 2 o of the transmitter 1 is set to select the output signal of the control signal
generating circuit 19, only the control signal by the operation of the operation unit is transmitted
from the antenna 22, and the receiver 6 Only the control signal is output from 24 and supplied
from the output terminal 28 to the VTR integrated camera 5. Thus, unnecessary operation of the
VTR integrated camera during imaging can be prevented, and unnecessary sound generation at
the time of adjustment operation of the VTR integrated camera and the like can be prevented.
When the switch 20 of the transmitter 1 is set to pass the output signals of the amplifier 17 and
the control signal generation circuit 19, an audio signal is normally transmitted from the antenna
22, but the operation key 14a The control signal is also transmitted from the antenna 22 along
with any of the operations 14 to 14f (FIG. 1). In this case, the switch 20 mixes the audio signal
with the control signal by any method such as frequency division multiplexing or time division
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multiplexing. In the receiver 6, a normal audio signal is output from the one-minute llm 1 circuit
24, but when a control signal is received, it is separated and output to the control output circuit
26. In this way, it is possible to perform operations such as start, stop and zooming of recording
while shooting. Although the present invention has been described above in detail, the present
invention is not limited to this embodiment. For example, the operation unit of the transmitter 1
may be provided with other operation keys having functions other than the above. Alternatively,
the receiver 6 may supply the demodulated received signal to the VTR integrated camera where
it is separated into an audio signal and a control signal. As described above, according to the
present invention, an audio signal and a control signal can be transmitted and received with a
single transmitter and receiver. Functions simultaneously, and the control range is also greatly
expanded compared to conventional wired remote control systems. Further, according to the
present invention, any one of the transmission mode of only the audio signal, the transmission
mode of the control signal only, and the transmission mode of the audio signal and the control
signal can be arbitrarily selected. It is possible to prevent transmission, and to control the
receiving device while sending an audio signal to the receiving side, and the usability is greatly
improved.
In particular, when the receiving device is a VTR integrated camera, unnecessary operation at the
time of imaging and offensive sound generation at the time of adjustment operation of the VTR
integrated camera can be prevented, and at the time of imaging Desired operations such as
zooming at the same time are also possible.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a block diagram showing an embodiment of a wireless microphone system according to
the present invention, FIG. 2 is a block diagram showing a circuit configuration of a transmitter
in FIG. 1, and FIG. 3 is a block showing a circuit configuration of a receiver. FIG. 4 is a block
diagram showing an example of a conventional wireless microphone system.
DESCRIPTION OF SYMBOLS 1 ... Transmitter, 3 ... Microphone, 5 ... VTR-type camera, 6 ...
Receiver, 8 ... Antenna, 11 ... Mounting part, 12 ... Change-over switch, 13 иии Power switch, 14a to
14f иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Operation keys.
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