JPH03204245A - Two-way voice ordering communication equipment - Google Patents

Abstract

PURPOSE:To attain communication in an emergency not through a base station by using an emergency switch so as to select simplex and duplex talking. CONSTITUTION:A slave set is in talking with other slave set via a base station normally at a frequency in the duplex mode, and when the base station is faulty, a slave set operates an emergency switch 38 to throw forcibly a simplex/duplex transmission reception changeover device 33 to the position of the simplex SMP thereby receiving a frequency f1. When the user of the slave set depresses a talk switch 37, a transmission reception antenna changeover switch 26 is thrown to the position of a receiver RX the same as the case with the duplex mode and a CS reception section 31 receives the same frequency f1 as the transmission frequency. Thus, the simplex talking with reception priority is started when a reception carrier is not sensed. Thus, the slave set makes simplex talking with other slave set not through the base station by the operation of the emergency switch 38.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a two-way audio communication device used for communicating progress in program production at a broadcasting station or on a theater stage.

(Prior art) For example, when giving progress instructions in the production of a broadcast program, clear instructions can be given in a noisy environment or, conversely, in a quiet environment.
Alternatively, wireless voice communication devices are used to communicate with producers and directors without breaking the silence.

FIG. 2 shows the configuration of such a conventional two-way voice communication device, and FIG. 2(a) and FIG. 9(b) are a diagram of a mode and a diagram of a communication system, respectively.

In figure (a), 1 to 4 are receivers, respectively, and one channel (hereinafter, ch
The reception input from the antenna is connected to the mixer/distributor 5, and the audio output signal is input to the transmission controller 6 and can be transmitted and received from the antenna 7 or 8.

In addition, 9 to 12 are slave units, and each Chi
One wave of channels 1 to 4 can be received, and a herad set 13 is detachably connected to each channel.

In the above configuration, as shown in Figure (b), the base station 14 has a frequency f
, is the transmission frequency, and the handsets 9 to 12 communicate with the base station 14 by transmitting one wave of the channel frequencies f to f4 assigned to them respectively.

To start the call, for example, when the handset 9 calls the handset 10, the handset 9 first presses the talk switch it has and uses the built-in carrier sense (hereinafter abbreviated as C8) receiver 15 to self-identify. When used for a call, the same frequency f1 is received, and after confirming that there is no carrier input, the transmitter TXI is activated and transmits using the transmission frequency f1 of the handset 9.

In the base station 14, the receiver RX1 of the reception frequency f1 receives the signal, and the demodulated audio output is sent to the transmission controller 6.
The transmitter TXB is activated and relay transmission is performed to the handset 10 using the base station frequency fll.

As described above, even in the past, calls between the handset 9 and handset 10 are possible via the base station, and due to frequency allocation, simultaneous calls can be made between multiple stations with the base station 14 as the chairperson. did it.

(Problems to be Solved by the Invention) As mentioned above, voice communication is fully possible with the conventional two-way voice communication device, but the call must always be made via a base station. If there is a failure of the base station, power outage, construction work, or other disturbance, there is a problem that calls may become impossible.

It is an object of the present invention to eliminate the above-mentioned problems and provide a two-way voice communication device that allows handsets to communicate directly with each other without going through a base station.

(Means for Solving the Problems) The present invention achieves the above object by providing a base station and a plurality of slave units each having an O8 reception unit, wherein the slave units are configured such that the same carrier is not used by the O8 reception unit. After confirming that
In a two-way voice communication device that enables communication with other handsets via a base station, an audio demodulation section is provided in the C8 receiving section of the handset, and the demodulated high power is converted into received audio for duplexing. By amplifying the signal using the circuit section, direct communication with other slave devices is possible and achieved.

(Function) According to the present invention, handsets can communicate directly with each other without going through a base station.

(Example) Hereinafter, the present invention will be explained by examples using the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention.

The present invention makes it possible to make simple calls between handsets 21, 22, and 23 as shown in FIG. 2(a).

Figure (b) is a block diagram showing one embodiment of the configuration of the handset.
24 is an antenna, and an antenna transmission/reception distributor 25? ,
Connected to 25□. 26 is an antenna changeover switch for C8 reception, and transmitting circuit section 27. Transmission local oscillation circuit section 28. Transmission audio circuit section 29. and a transmission system consisting of a microphone 30 as an audio input section, and a C8 reception section 3.
1. a demodulator 32, and a simplex/duplex transmitter/receiver switch 33 for switching between simplex, duplex, and transmit/receive.

The C8 reception system consisting of the reception audio circuit section 34 and the speaker 35 is switched.

Reference numeral 36 denotes a control unit which performs switching between CS31 talk, duplex call, and transmission/reception, to which a talk switch 37 and an emergency switch 38 are connected, and controls switching of the single/duplex transmission/reception switch 33.

Further, 39 is a duplex receiving section, the output of which is inputted to the single/duplex transmit/receive switch 33 via the demodulator 40. 41 is a reception local oscillation section which is switched by the control section 36 mentioned above.

Figure (C) shows a perspective view of the external appearance of the handset, 37 and 38 are the talk switch and emergency switch of Figure (b), 42 is the volume volume, 43 is the power back, and 44
is a connection terminal of the herad set 13 (see Fig. 2).

In the present invention configured as described above, firstly, in a normal duplex call (communication relayed at a base station), the single-duplex transmission/reception switch 33
is switched to the duplex side DUP and is being received.

When the talk switch 37 is pressed in the handset (this handset is assigned a transmission frequency of f), the controller 36 brings the antenna changeover switch 26 into contact with the receiving side RX, and the C8 receiving section 31, the same frequency f1 as the transmitting frequency is received, and if there is no receiving carrier, the transmitting/receiving antenna changeover switch 26 is connected to the transmitting side TX at the same time.

Transmission circuit section 27. Transmission local oscillation circuit section 28. Transmission audio circuit section 29. Then, the microphone 30 is activated to transmit the voice of the handset at the frequency f1. The duplex receiving unit 39 has already been activated and is receiving the transmission frequency fIl of the base station.

As described above, the frequency f+f is normally set in duplex mode.
I am using the base station to relay calls to other handsets, but
If there is a failure in the base station 14, the handset will switch to the emergency switch 38.
, and forcibly switches the single/duplex transmission/reception switch 33 to the simplex side SMP so that frequency f1 can be received, and when the user of the handset presses the talk switch 37, it is the same as in the case of duplex.

The transmitting/receiving antenna changeover switch 26 is connected to the receiving RX side, and the C8 receiving section 31 selects the same frequency f as the transmitting frequency.
If there is no interest from the receiving carrier, it becomes possible to start a simple call with reception priority.

As described above, the present invention utilizes the audio signal of the C8 receiver 31 by operating the emergency switch 38,
Simplex calls can be made between other handsets without relaying through the base station, and since it is a simplex call that prioritizes reception, simultaneous transmission is not possible, so there is the advantage that beat interference does not occur.

In addition, if the handset uses another frequency, press the emergency switch 3.
At the time of operation 7, if the oscillation frequencies of the transmitting local oscillation circuit section 28 and the receiving local oscillating section 41 are simultaneously switched to be suitable for the frequency f4, the above-mentioned telephone conversation becomes possible.

(Effects of the Invention) As is clear from the above explanation, the present invention uses an emergency switch to switch between simplex and duplex calls, and in addition to normal duplex calls, the base station is It has the great advantage of being able to make calls without going through the phone, and since it is a simplex call that prioritizes reception, the C8 function has the advantage of not oscillating beats due to simultaneous transmission on the same frequency.
It can be used to great effect.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing the configuration of a conventional two-way voice communication device. 25? , 25R...Antenna transmission/reception distributor, 26
...Antenna changeover switch, 27...Transmission circuit section, 2
8... Transmission local oscillation circuit section. 29...Transmission audio circuit section, 31...C8 reception section,
32... Demodulation unit, 33... Single/duplex transmission/reception switch, 34
- Receiving audio circuit section, 36...control section, 37...
Talk switch, 38...Emergency switch, 39
... Duplex receiving section, 41... Receiving local oscillation section, 44...
・Headset connection terminal.

Claims (1)

[Claims] Consisting of a base station and a plurality of slave units each having a carrier sense receiver, each slave unit transmits information to other slave units via the base station after confirming that the same carrier is not being used by the carrier sense receiver. In the two-way voice communication device that can talk to other users, an audio demodulation section is provided in the carrier sense reception section of the handset, and the demodulated output is amplified by the receiving audio circuit section for duplexing. A two-way voice communication device characterized by enabling direct communication with a handset.